1
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Yu S, Dai W, Su C, Milosavic N, Wang Z, Wang X, Zhu Y, He M, Landry DW, Stojanovic MN, Lin Q. An Internally Attached Aptameric Graphene Nanosensor for Sensitive Vasopressin Measurement in Critical Patient Monitoring. ACS Sens 2024; 9:4915-4923. [PMID: 39268764 DOI: 10.1021/acssensors.4c01519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2024]
Abstract
This paper presents an aptameric graphene nanosensor for rapid and sensitive measurement of arginine vasopressin (AVP) toward continuous monitoring of critical care patients. The nanosensor is a field-effect transistor (FET) with monolayer graphene as the conducting channel and is functionalized with a new custom-designed aptamer for specific AVP recognition. Binding between the aptamer and AVP induces a change in the carrier density in the graphene and resulting in measurable changes in FET characteristics for determination of the AVP concentration. The aptamer, based on the natural enantiomer D-deoxyribose, possess optimized kinetic binding properties and is attached at an internal position to the graphene for enhanced sensitivity to low concentrations of AVP. Experimental results show that this aptameric graphene nanosensor is highly sensitive (with a limit of detection of 0.3 pM and a resolution of 0.1 pM) to AVP, and rapidly responsive (within 90 s) to both increasing and decreasing AVP concentration changes. The device is also reversable (within 4%), repeatable (within 4%) and reproducible (within 5%) in AVP measurements.
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Affiliation(s)
- Shifeng Yu
- College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Wenting Dai
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Chao Su
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
- Department of Power and Energy Engineering, Xian Jiaotong University, Xian, Shaanxi 710049, China
| | - Nenad Milosavic
- Department of Medicine, Columbia University, New York, New York 10032, United States
| | - Ziran Wang
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Xuejun Wang
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Yibo Zhu
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Maogang He
- Department of Power and Energy Engineering, Xian Jiaotong University, Xian, Shaanxi 710049, China
| | - Donald W Landry
- Department of Medicine, Columbia University, New York, New York 10032, United States
| | - Milan N Stojanovic
- Department of Medicine, Columbia University, New York, New York 10032, United States
| | - Qiao Lin
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
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2
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Han J, Choi Y, Lee H, Lee DC, Lim J. Oligomeric Zinc Thiolates Tethering Multidentate Carboxylates for Nondestructive Aqueous Phase Transfer of Quantum Dots. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309284. [PMID: 38359073 DOI: 10.1002/smll.202309284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/15/2024] [Indexed: 02/17/2024]
Abstract
Functionalization of quantum dots (QDs) via ligand exchange is prone to debase their photoluminescence quantum yield (PL QY) owing to the unavoidable surface damage by excess reactants, and even worse in aqueous medium. Herein, the oligomeric zinc thiolate as the multidentate hydrophilic ligand featuring facile synthetic protocol is proposed. A simple reaction between ZnCl2 and 3-mercaptopropionic acid produces oligomeric ligands containing 3-6 zinc thiolate units, where the terminal moieties provide multidentate anchoring to the surface as well as hydrophilicity. 2D proton nuclear Overhauser effect spectroscopy (2D 1H NOESY) and X-ray photoelectron spectroscopy (XPS) reveal that the oligomeric zinc thiolate ligands adsorb on the surface via multidentate metal carboxylate bindings without destruction of molecular structure, regardless of partial dissociation of thiolate branches in aqueous phase. Enhanced binding affinity granted by the multidentate nature allows for the effective exchange of original surface ligands without considerable surface deterioration. The zinc thiolate-capped Cd-free aqueous QDs exhibit a high photoluminescence quantum yield of ≈90% and extended stability against long-term storage and photochemical stress.
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Affiliation(s)
- Jisu Han
- Department of Energy Science, Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Yeongho Choi
- Department of Energy Science, Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Hyeonjun Lee
- Department of Chemical and Biomolecular Engineering, KAIST Institute for the Nanocentury (KINC), Energy and Environmental Research Center (EERC), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Doh C Lee
- Department of Chemical and Biomolecular Engineering, KAIST Institute for the Nanocentury (KINC), Energy and Environmental Research Center (EERC), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Jaehoon Lim
- Department of Energy Science, Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do, 16419, Republic of Korea
- SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea
- Department of Future Energy Engineering (DFEE), Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea
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3
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Kshirsagar AS, Koch KA, Srimath Kandada AR, Gangishetty MK. Unraveling the Luminescence Quenching Mechanism in Strong and Weak Quantum-Confined CsPbBr 3 Triggered by Triarylamine-Based Hole Transport Layers. JACS AU 2024; 4:1229-1242. [PMID: 38559743 PMCID: PMC10976578 DOI: 10.1021/jacsau.4c00083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/16/2024] [Accepted: 02/21/2024] [Indexed: 04/04/2024]
Abstract
Luminescence quenching by hole transport layers (HTLs) is one of the major issues in developing efficient perovskite light-emitting diodes (PeLEDs), which is particularly prominent in blue-emitting devices. While a variety of material systems have been used as interfacial layers, the origin of such quenching and the type of interactions between perovskites and HTLs are still ambiguous. Here, we present a systematic investigation of the luminescence quenching of CsPbBr3 by a commonly employed hole transport polymer, poly[(9,9-dioctylfluorenyl-2,7diyl)-co-(4,4'-(N-(4-sec-butylphenyl) diphenylamine)] (TFB), in LEDs. Strong and weak quantum-confined CsPbBr3 (nanoplatelets (NPLs)/nanocrystals (NCs)) are rationally selected to study the quenching mechanism by considering the differences in their morphology, energy level alignments, and quantum confinement. The steady-state and time-resolved Stern-Volmer plots unravel the dominance of dynamic and static quenching at lower and higher concentrations of TFB, respectively, with a maximum quenching efficiency of 98%. The quenching rate in NCs is faster than that in NPLs owing to their longer PL lifetimes and weak quantum confinement. The ultrafast transient absorption results support these dynamics and rule out the involvement of Forster or Dexter energy transfer. Finally, the 1D 1H and 2D nuclear overhauser effect spectroscopy nuclear magnetic resonance (NOESY NMR) study confirms the exchange of native ligands at the NCs surface with TFB, leading to dark CsPbBr3-TFB ensemble formation accountable for luminescence quenching. This highlights the critical role of the triarylamine functional group on TFB (also the backbone of many HTLs) in the quenching process. These results shed light on the underlying reasons for the luminescence quenching in PeLEDs and will help to rationally choose the interfacial layers for developing efficient LEDs.
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Affiliation(s)
- Anuraj S. Kshirsagar
- Department
of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Katherine A. Koch
- Department
of Physics and Center for Functional Materials, Wake Forest University, 2090 Eure Drive, Winston Salem, North Carolina 27109, United
States
| | - Ajay Ram Srimath Kandada
- Department
of Physics and Center for Functional Materials, Wake Forest University, 2090 Eure Drive, Winston Salem, North Carolina 27109, United
States
| | - Mahesh K. Gangishetty
- Department
of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
- Department
of Physics and Astronomy, Mississippi State
University, Mississippi State, Mississippi 39762, United States
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4
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Tosa K, Ding C, Chen S, Hayase S, Shen Q. Classifying the Role of Surface Ligands on the Passivation and Stability of Cs 2NaInCl 6 Double Perovskite Quantum Dots. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:376. [PMID: 38392749 PMCID: PMC10892567 DOI: 10.3390/nano14040376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/01/2024] [Accepted: 02/10/2024] [Indexed: 02/24/2024]
Abstract
Cs2NaInCl6 double perovskites, which have excellent photoelectric conversion properties and are non-toxic and lead-free, have recently gained significant attention. In particular, double-perovskite quantum dots (QDs) are viewed as a promising material for optoelectronic device applications. Ligands such as oleic acid (OA) and oleylamine (OAm) are essential for the synthesis of perovskite QDs, but their specific roles in double-perovskite QDs remain unclear. In this study, we have investigated the binding of OA and OAm to Cs2NaInCl6 QDs through FTIR and NMR and their effects on the surface defect reduction and stability improvement for Cs2NaInCl6 QDs. We found that only OAm was bound to the QD surfaces while OA was not. The OAm has a significant effect on the photoluminescence quantum yield (PLQY) improvement by passivating the QD surface defects. The stability of the QDs was also evaluated, and it was observed that OA played a significant role in the stability of the QDs. Our findings provide valuable insights into the roles of ligands in influencing the photophysical properties and stability of lead-free double-perovskite QDs.
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Affiliation(s)
- Keita Tosa
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan; (K.T.); (S.C.); (S.H.)
| | - Chao Ding
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China
| | - Shikai Chen
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan; (K.T.); (S.C.); (S.H.)
| | - Shuzi Hayase
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan; (K.T.); (S.C.); (S.H.)
| | - Qing Shen
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan; (K.T.); (S.C.); (S.H.)
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5
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Cao W, Yakimov A, Qian X, Li J, Peng X, Kong X, Copéret C. Surface Sites and Ligation in Amine-capped CdSe Nanocrystals. Angew Chem Int Ed Engl 2023; 62:e202312713. [PMID: 37869935 DOI: 10.1002/anie.202312713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 10/24/2023]
Abstract
Converting colloidal nanocrystals (NCs) into devices for various applications is facilitated by designing and controlling their surface properties. One key strategy for tailoring surface properties is thus to choose tailored surface ligands. In that context, amines have been universally used, with the goal to improve NCs synthesis, processing and performances. However, understanding the nature of surface sites in amine-capped NCs remains challenging, due to the complex surface compositions as well as surface ligands dynamic. Here, we investigate both surface sites and amine ligation in CdSe NCs by combining advanced NMR spectroscopy and computational modelling. Notably, dynamic nuclear polarization (DNP) enhanced 113 Cd and 77 Se 1D NMR helps to identify both bulk and surface sites of NCs, while 113 Cd 2D NMR spectroscopy enables to resolve amines terminated sites on both Se-rich and nonpolar surfaces. In addition to directly bonding to surface sites, amines are shown to also interact through hydrogen-bonding with absorbed water as revealed by 15 N NMR, augmented with computations. The characterization methodology developed for this work provides unique molecular-level insight into the surface sites of a range of amine-capped CdSe NCs, and paves the way to identify structure-function relationships and rational approaches towards colloidal NCs with tailored properties.
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Affiliation(s)
- Weicheng Cao
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland
- Department of Chemistry, Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Alexander Yakimov
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Xudong Qian
- Department of Chemistry, Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Jiongzhao Li
- Department of Chemistry, Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Xiaogang Peng
- Department of Chemistry, Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Xueqian Kong
- Institute of Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Chemistry, Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, Hangzhou, 310058, China
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093, Zürich, Switzerland
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6
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Branzi L, Lavet O, Gun'ko YK. Ligand induced chirality in In 2S 3 nanoparticles. NANOSCALE 2023; 15:18753-18761. [PMID: 37953729 DOI: 10.1039/d3nr04320g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Chiral inorganic nanostructures have attracted a lot of attention over the last few years. Here we report the first observation of chirality in indium sulfide nanoparticles, which have been produced by a co-precipitation reaction in the presence of cysteine as a chiral agent. The process resulted in the production of spherical nanoparticles with an average diameter of around 3.6 nm. Circular dichroism spectroscopy of the nanoparticles showed an intense chiroptical signal corresponding to the indium sulfide excitonic transition, confirming the successful transfer of chirality to the In2S3 inorganic matrix. Nuclear magnetic resonance analysis of a colloidal solution of the nanoparticles demonstrated critical evidence of chemisorption of the chiral ligand on the surface of the nanoparticles and revealed a characteristic fast chemical exchange between the ligand chemisorbed on the surface of the nanoparticles and the free ligand in solution. Finally, the effect of the chiral ligand's structure on the transfer of chirality was investigated, with consideration of other amino acid ligands, and the critical role of the thiolate group in the optimisation of the chiral transfer was observed. This research is expected to stimulate further development and applications of new chiral semiconductor nanomaterials.
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Affiliation(s)
- Lorenzo Branzi
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland.
| | - Oriane Lavet
- Chemistry Department, University of Clermont Auvergne, Antenne du Puy en Velay, 43009 Le Puy en Velay Cedex, France
| | - Yurii K Gun'ko
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland.
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7
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Mouat JM, Widness JK, Enny DG, Meidenbauer MT, Awan F, Krauss TD, Weix DJ. CdS Quantum Dots for Metallaphotoredox-Enabled Cross-Electrophile Coupling of Aryl Halides with Alkyl Halides. ACS Catal 2023; 13:9018-9024. [PMID: 38283073 PMCID: PMC10812861 DOI: 10.1021/acscatal.3c01984] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Semiconductor quantum dots (QDs) offer many advantages as photocatalysts for synthetic photoredox catalysis, but no reports have explored the use of QDs with nickel catalysts for C-C bond formation. We show here that 5.7 nm CdS QDs are robust photocatalysts for photoredox-promoted cross-electrophile coupling (40 000 TON). These conditions can be utilized on small scale (96-well plate) or adapted to flow. NMR studies show that triethanolamine (TEOA) capped QDs are the active catalyst and that TEOA can displace native phosphonate and carboxylate ligands, demonstrating the importance of QD surface chemistry.
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Affiliation(s)
- Julianna M. Mouat
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, WI 53706 USA
| | - Jonas K. Widness
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, WI 53706 USA
| | - Daniel G. Enny
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, WI 53706 USA
| | | | - Farwa Awan
- Department of Chemistry, University of Rochester, Rochester, NY 14627 USA
| | - Todd D. Krauss
- Department of Chemistry, University of Rochester, Rochester, NY 14627 USA
- Institute of Optics, University of Rochester, Rochester, NY 14627 USA
| | - Daniel J. Weix
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, WI 53706 USA
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8
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Niebur A, Söll A, Haizmann P, Strolka O, Rudolph D, Tran K, Renz F, Frauendorf AP, Hübner J, Peisert H, Scheele M, Lauth J. Untangling the intertwined: metallic to semiconducting phase transition of colloidal MoS 2 nanoplatelets and nanosheets. NANOSCALE 2023; 15:5679-5688. [PMID: 36861175 DOI: 10.1039/d3nr00096f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
2D semiconducting transition metal dichalcogenides (TMDCs) are highly promising materials for future spin- and valleytronic applications and exhibit an ultrafast response to external (optical) stimuli which is essential for optoelectronics. Colloidal nanochemistry on the other hand is an emerging alternative for the synthesis of 2D TMDC nanosheet (NS) ensembles, allowing for the control of the reaction via tunable precursor and ligand chemistry. Up to now, wet-chemical colloidal syntheses yielded intertwined/agglomerated NSs with a large lateral size. Here, we show a synthesis method for 2D mono- and bilayer MoS2 nanoplatelets with a particularly small lateral size (NPLs, 7.4 nm ± 2.2 nm) and MoS2 NSs (22 nm ± 9 nm) as a reference by adjusting the molybdenum precursor concentration in the reaction. We find that in colloidal 2D MoS2 syntheses initially a mixture of the stable semiconducting and the metastable metallic crystal phase is formed. 2D MoS2 NPLs and NSs then both undergo a full transformation to the semiconducting crystal phase by the end of the reaction, which we quantify by X-ray photoelectron spectroscopy. Phase pure semiconducting MoS2 NPLs with a lateral size approaching the MoS2 exciton Bohr radius exhibit strong additional lateral confinement, leading to a drastically shortened decay of the A and B exciton which is characterized by ultrafast transient absorption spectroscopy. Our findings represent an important step for utilizing colloidal TMDCs, for example small MoS2 NPLs represent an excellent starting point for the growth of heterostructures for future colloidal photonics.
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Affiliation(s)
- André Niebur
- Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, D-30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
| | - Aljoscha Söll
- Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, D-30167 Hannover, Germany.
| | - Philipp Haizmann
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Onno Strolka
- Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, D-30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Dominik Rudolph
- Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, D-30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
| | - Kevin Tran
- Institute of Inorganic Chemistry, Leibniz University Hannover, Callinstr. 9, D-30167 Hannover, Germany
- Laboratory of Nano and Quantum Engineering (LNQE), Leibniz University Hannover, Schneiderberg 39, D-30167 Hannover, Germany
| | - Franz Renz
- Institute of Inorganic Chemistry, Leibniz University Hannover, Callinstr. 9, D-30167 Hannover, Germany
- Laboratory of Nano and Quantum Engineering (LNQE), Leibniz University Hannover, Schneiderberg 39, D-30167 Hannover, Germany
| | - André Philipp Frauendorf
- Institute of Solid State Physics, Leibniz University Hannover, Appelstr. 2, D-30167 Hannover, Germany
| | - Jens Hübner
- Laboratory of Nano and Quantum Engineering (LNQE), Leibniz University Hannover, Schneiderberg 39, D-30167 Hannover, Germany
- Institute of Solid State Physics, Leibniz University Hannover, Appelstr. 2, D-30167 Hannover, Germany
| | - Heiko Peisert
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Marcus Scheele
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Jannika Lauth
- Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, D-30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering - Innovation Across Disciplines), Hannover, Germany
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
- Laboratory of Nano and Quantum Engineering (LNQE), Leibniz University Hannover, Schneiderberg 39, D-30167 Hannover, Germany
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9
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Scalon L, Freitas FS, Marques FDC, Nogueira AF. Tiny spots to light the future: advances in synthesis, properties, and application of perovskite nanocrystals in solar cells. NANOSCALE 2023; 15:907-941. [PMID: 36629010 DOI: 10.1039/d2nr05043a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Perovskites are in the hotspot of material science and technology. Outstanding properties have been discovered, fundamental mechanisms of defect formation and degradation elucidated, and applications in a wide variety of optoelectronic devices demonstrated. Advances through adjusting the bulk-perovskite composition, as well as the integration of layered and nanostructured perovskites in the devices, allowed improvement in performance and stability. Recently, efforts have been devoted to investigating the effects of quantum confinement in perovskite nanocrystals (PNCs) aiming to fabricate optoelectronic devices based solely on these nanoparticles. In general, the applications are focused on light-emitting diodes, especially because of the high color purity and high fluorescence quantum yield obtained in PNCs. Likewise, they present important characteristics featured for photovoltaic applications, highlighting the possibility of stabilizing photoactive phases that are unstable in their bulk analog, the fine control of the bandgap through size change, low defect density, and compatibility with large-scale deposition techniques. Despite the progress made in the last years towards the improvement in the performance and stability of PNCs-based solar cells, their efficiency is still much lower than that obtained with bulk perovskite, and discussions about upscaling of this technology are scarce. In light of this, we address in this review recent routes towards efficiency improvement and the up-scaling of PNC solar cells, emphasizing synthesis management and strategies for solar cell fabrication.
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Affiliation(s)
- Lucas Scalon
- Institute of Chemistry, University of Campinas, Campinas, São Paulo 13083-970, Brazil.
| | - Flavio Santos Freitas
- Centro Federal de Educação Tecnológica de Minas Gerais, Minas Gerais 30421-169, Brazil
| | | | - Ana Flávia Nogueira
- Institute of Chemistry, University of Campinas, Campinas, São Paulo 13083-970, Brazil.
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10
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Mashiach R, Avram L, Bar-Shir A. Diffusion 19F-NMR of Nanofluorides: In Situ Quantification of Colloidal Diameters and Protein Corona Formation in Solution. NANO LETTERS 2022; 22:8519-8525. [PMID: 36255401 PMCID: PMC9650773 DOI: 10.1021/acs.nanolett.2c02994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/08/2022] [Indexed: 06/16/2023]
Abstract
The NMR-detectability of elements of organic ligands that stabilize colloidal inorganic nanocrystals (NCs) allow the study of their diffusion characteristics in solutions. Nevertheless, these measurements are sensitive to dynamic ligand exchange and often lead to overestimation of diffusion coefficients of dispersed colloids. Here, we present an approach for the quantitative assessment of the diffusion properties of colloidal NCs based on the NMR signals of the elements of their inorganic cores. Benefiting from the robust 19F-NMR signals of the fluorides in the core of colloidal CaF2 and SrF2, we show the immunity of 19F-diffusion NMR to dynamic ligand exchange and, thus, the ability to quantify, with high accuracy, the colloidal diameters of different types of nanofluorides in situ. With the demonstrated ability to characterize the formation of protein corona at the surface of nanofluorides, we envision that this study can be extended to additional formulations and applications.
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Affiliation(s)
- Reut Mashiach
- Department
of Molecular Chemistry and Materials Science and Department of
Chemical Research Support, Weizmann Institute
of Science, Rehovot, 7610001, Israel
| | - Liat Avram
- Department
of Molecular Chemistry and Materials Science and Department of
Chemical Research Support, Weizmann Institute
of Science, Rehovot, 7610001, Israel
| | - Amnon Bar-Shir
- Department
of Molecular Chemistry and Materials Science and Department of
Chemical Research Support, Weizmann Institute
of Science, Rehovot, 7610001, Israel
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11
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Busatto S, Spallacci C, Meeldijk JD, Howes S, de Mello Donega C. Room-Temperature Interconversion Between Ultrathin CdTe Magic-Size Nanowires Induced by Ligand Shell Dynamics. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:15280-15297. [PMID: 36147520 PMCID: PMC9483966 DOI: 10.1021/acs.jpcc.2c04113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 08/10/2022] [Indexed: 06/16/2023]
Abstract
The formation mechanisms of colloidal magic-size semiconductor nanostructures have remained obscure. Herein, we report the room temperature synthesis of three species of ultrathin CdTe magic-size nanowires (MSNWs) with diameters of 0.7 ± 0.1 nm, 0.9 ± 0.2 nm, and 1.1 ± 0.2 nm, and lowest energy exciton transitions at 373, 418, and 450 nm, respectively. The MSNWs are obtained from Cd(oleate)2 and TOP-Te, provided diphenylphosphine and a primary alkylamine (RNH2) are present at sufficiently high concentrations, and exhibit sequential, discontinuous growth. The population of each MSNW species is entirely determined by the RNH2 concentration [RNH2] so that single species are only obtained at specific concentrations, while mixtures are obtained at concentrations intermediate between the specific ones. Moreover, the MSNWs remain responsive to [RNH2], interconverting from thinner to thicker upon [RNH2] decrease and from thicker to thinner upon [RNH2] increase. Our results allow us to propose a mechanism for the formation and interconversion of CdTe MSNWs and demonstrate that primary alkylamines play crucial roles in all four elementary kinetic steps (viz., monomer formation, nucleation, growth in length, and interconversion between species), thus being the decisive element in the creation of a reaction pathway that leads exclusively to CdTe MSNWs. The insights provided by our work thus contribute toward unravelling the mechanisms behind the formation of shape-controlled and atomically precise magic-size semiconductor nanostructures.
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Affiliation(s)
- Serena Busatto
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Claudia Spallacci
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Johannes D. Meeldijk
- Materials
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Stuart Howes
- Structural
Biochemistry, Bijvoet Centre for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Celso de Mello Donega
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
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12
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Branzi L, Purcell-Milton F, Cressoni C, Back M, Cattaruzza E, Speghini A, Gun'ko YK, Benedetti A. Chiral non-stoichiometric ternary silver indium sulfide quantum dots: investigation on the chirality transfer by cysteine. NANOSCALE 2022; 14:12174-12182. [PMID: 35968905 DOI: 10.1039/d2nr03330e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Chiral semiconductor quantum dots have recently received broad attention due to their promising application in several fields such as sensing and photonics. The extensive work in the last few years was focused on the observation of the chiroptical properties in binary Cd based systems. Herein, we report on the first evidence of ligand-induced chirality in silver indium sulfide semiconductor quantum dots. Ternary disulfide quantum dots are of great interest due to their remarkable optical properties and low toxicity. Non-stoichiometric silver indium sulfide quantum dots were produced via a room temperature coprecipitation in water, in the presence of cysteine as a capping agent. The obtained nanocrystals show a notable photoluminescence quantum yield of 0.24 in water dispersions. Several critical aspects of the nanocrystal growth and chemico-physical characterization, and the optimisation of the surface passivation by the chiral ligand in order to optimize the nanoparticle chirality are thoroughly investigated. Optical spectroscopy methods such as circular dichroism and luminescence as well as nuclear magnetic resonance techniques are exploited to analyze the coordination processes leading to the formation of the ligand-nanocrystal chiral interface. This study highlights the dynamic nature of the interaction between the nanocrystal surface and the chiral ligand and clarifies some fundamental aspects for the transfer and optimization of the chiroptical properties.
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Affiliation(s)
- Lorenzo Branzi
- Department of Molecular Science and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
| | - Finn Purcell-Milton
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland.
- School of Chemical & Pharmaceutical Sciences, Technological University Dublin, Grangegorman, Dublin 2, Ireland
| | - Chiara Cressoni
- Nanomaterials Research Group, Department of Biotechnology and INSTM, RU of Verona, University of Verona, Strada le Grazie 15, Verona, Italy.
| | - Michele Back
- Department of Molecular Science and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
| | - Elti Cattaruzza
- Department of Molecular Science and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
| | - Adolfo Speghini
- Nanomaterials Research Group, Department of Biotechnology and INSTM, RU of Verona, University of Verona, Strada le Grazie 15, Verona, Italy.
| | - Yurii K Gun'ko
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland.
| | - Alvise Benedetti
- Department of Molecular Science and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
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13
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Sanmartín-Matalobos J, Bermejo-Barrera P, Aboal-Somoza M, Fondo M, García-Deibe AM, Corredoira-Vázquez J, Alves-Iglesias Y. Semiconductor Quantum Dots as Target Analytes: Properties, Surface Chemistry and Detection. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2501. [PMID: 35889725 PMCID: PMC9318497 DOI: 10.3390/nano12142501] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 07/17/2022] [Accepted: 07/19/2022] [Indexed: 02/04/2023]
Abstract
Since the discovery of Quantum Dots (QDs) by Alexey I. Ekimov in 1981, the interest of researchers in that particular type of nanomaterials (NMs) with unique optical and electrical properties has been increasing year by year. Thus, since 2009, the number of scientific articles published on this topic has not been less than a thousand a year. The increasing use of QDs due to their biomedical, pharmaceutical, biological, photovoltaics or computing applications, as well as many other high-tech uses such as for displays and solid-state lighting (SSL), has given rise to a considerable number of studies about its potential toxicity. However, there are a really low number of reported studies on the detection and quantification of QDs, and these include ICP-MS and electrochemical analysis, which are the most common quantification techniques employed for this purpose. The knowledge of chemical phenomena occurring on the surface of QDs is crucial for understanding the interactions of QDs with species dissolved in the dispersion medium, while it paves the way for a widespread use of chemosensors to facilitate its detection. Keeping in mind both human health and environmental risks of QDs as well as the scarcity of analytical techniques and methodological approaches for their detection, the adaptation of existing techniques and methods used with other NMs appears necessary. In order to provide a multidisciplinary perspective on QD detection, this review focused on three interrelated key aspects of QDs: properties, surface chemistry and detection.
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Affiliation(s)
- Jesús Sanmartín-Matalobos
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
| | - Pilar Bermejo-Barrera
- Trace Element, Speciation and Spectroscopy Group (GETEE), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (P.B.-B.); (M.A.-S.)
| | - Manuel Aboal-Somoza
- Trace Element, Speciation and Spectroscopy Group (GETEE), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (P.B.-B.); (M.A.-S.)
| | - Matilde Fondo
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
| | - Ana M. García-Deibe
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
| | - Julio Corredoira-Vázquez
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
| | - Yeneva Alves-Iglesias
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
- Trace Element, Speciation and Spectroscopy Group (GETEE), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (P.B.-B.); (M.A.-S.)
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14
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Mir WJ, Alamoudi A, Yin J, Yorov KE, Maity P, Naphade R, Shao B, Wang J, Lintangpradipto MN, Nematulloev S, Emwas AH, Genovese A, Mohammed OF, Bakr OM. Lecithin Capping Ligands Enable Ultrastable Perovskite-Phase CsPbI 3 Quantum Dots for Rec. 2020 Bright-Red Light-Emitting Diodes. J Am Chem Soc 2022; 144:13302-13310. [PMID: 35834433 DOI: 10.1021/jacs.2c04637] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bright-red light-emitting diodes (LEDs) with a narrow emission line width that emit between 620 and 635 nm are needed to meet the latest industry color standard for wide color gamut displays, Rec. 2020. CsPbI3 perovskite quantum dots (QDs) are one of the few known materials that are ideally suited to meet these criteria. Unfortunately, CsPbI3 perovskite QDs are prone to transform into a non-red-emitting phase and are subject to further degradation mechanisms when their luminescence wavelength is tuned to match that of the Rec. 2020 standard. Here, we show that zwitterionic lecithin ligands can stabilize the perovskite phase of CsPbI3 QDs for long periods in air for at least 6 months compared to a few days for control samples. LEDs fabricated with our ultrastable lecithin-capped CsPbI3 QDs exhibit an external quantum efficiency (EQE) of 7.1% for electroluminescence centered at 634 nm─a record for all-inorganic perovskite nanocrystals in Rec. 2020 red. Our devices achieve a maximum luminance of 1391 cd/m2 at 7.5 V, and their operational half-life is 33 min (T50) at 200 cd/m2─a 10-fold enhancement compared to control samples. Density functional theory results suggest that the surface strain in CsPbI3 QDs capped with the conventional ligands, oleic acid and oleylamine, contributes to the instability of the perovskite structural phase. On the other hand, lecithin binding induces virtually no surface strain and shows a stronger binding tendency for the CsPbI3 surface. Our study highlights the tremendous potential of zwitterionic ligands in stabilizing the perovskite phase and particle size of CsPbI3 QDs for various optoelectronic applications.
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Affiliation(s)
- Wasim J Mir
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ahmed Alamoudi
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jun Yin
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.,Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Khursand E Yorov
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Partha Maity
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.,Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Rounak Naphade
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Bingyao Shao
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jiayi Wang
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Muhammad Naufal Lintangpradipto
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Saidkhodzha Nematulloev
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Abdul-Hamid Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Alessandro Genovese
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Omar F Mohammed
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia.,Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M Bakr
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
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15
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Widness JK, Enny DG, McFarlane-Connelly KS, Miedenbauer MT, Krauss TD, Weix DJ. CdS Quantum Dots as Potent Photoreductants for Organic Chemistry Enabled by Auger Processes. J Am Chem Soc 2022; 144:12229-12246. [PMID: 35772053 DOI: 10.1021/jacs.2c03235] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Strong reducing agents (<-2.0 V vs saturated calomel electrode (SCE)) enable a wide array of useful organic chemistry, but suffer from a variety of limitations. Stoichiometric metallic reductants such as alkali metals and SmI2 are commonly employed for these reactions; however, considerations including expense, ease of use, safety, and waste generation limit the practicality of these methods. Recent approaches utilizing energy from multiple photons or electron-primed photoredox catalysis have accessed reduction potentials equivalent to Li0 and shown how this enables selective transformations of aryl chlorides via aryl radicals. However, in some cases, low stability of catalytic intermediates can limit turnover numbers. Herein, we report the ability of CdS nanocrystal quantum dots (QDs) to function as strong photoreductants and present evidence that a highly reducing electron is generated from two consecutive photoexcitations of CdS QDs with intermediate reductive quenching. Mechanistic experiments suggest that Auger recombination, a photophysical phenomenon known to occur in photoexcited anionic QDs, generates transient thermally excited electrons to enable the observed reductions. Using blue light-emitting diodes (LEDs) and sacrificial amine reductants, aryl chlorides and phosphate esters with reduction potentials up to -3.4 V vs SCE are photoreductively cleaved to afford hydrodefunctionalized or functionalized products. In contrast to small-molecule catalysts, QDs are stable under these conditions and turnover numbers up to 47 500 have been achieved. These conditions can also effect other challenging reductions, such as tosylate protecting group removal from amines, debenzylation of benzyl-protected alcohols, and reductive ring opening of cyclopropane carboxylic acid derivatives.
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Affiliation(s)
- Jonas K Widness
- Department of Chemistry, UW─Madison, Madison, Wisconsin 53706, United States
| | - Daniel G Enny
- Department of Chemistry, UW─Madison, Madison, Wisconsin 53706, United States
| | | | - Mahilet T Miedenbauer
- Materials Science Program, University of Rochester, Rochester, New York 14627, United States
| | - Todd D Krauss
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States.,Materials Science Program, University of Rochester, Rochester, New York 14627, United States.,Institute of Optics, University of Rochester, Rochester, New York 14627, United States
| | - Daniel J Weix
- Department of Chemistry, UW─Madison, Madison, Wisconsin 53706, United States
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16
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Parvizian M, Duràn Balsa A, Pokratath R, Kalha C, Lee S, Van den Eynden D, Ibáñez M, Regoutz A, De Roo J. The Chemistry of Cu 3 N and Cu 3 PdN Nanocrystals. Angew Chem Int Ed Engl 2022; 61:e202207013. [PMID: 35612297 PMCID: PMC9400990 DOI: 10.1002/anie.202207013] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Indexed: 12/25/2022]
Abstract
The precursor conversion chemistry and surface chemistry of Cu3 N and Cu3 PdN nanocrystals are unknown or contested. Here, we first obtain phase-pure, colloidally stable nanocubes. Second, we elucidate the pathway by which copper(II) nitrate and oleylamine form Cu3 N. We find that oleylamine is both a reductant and a nitrogen source. Oleylamine is oxidized by nitrate to a primary aldimine, which reacts further with excess oleylamine to a secondary aldimine, eliminating ammonia. Ammonia reacts with CuI to form Cu3 N. Third, we investigated the surface chemistry and find a mixed ligand shell of aliphatic amines and carboxylates (formed in situ). While the carboxylates appear tightly bound, the amines are easily desorbed from the surface. Finally, we show that doping with palladium decreases the band gap and the material becomes semi-metallic. These results bring insight into the chemistry of metal nitrides and might help the development of other metal nitride nanocrystals.
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Affiliation(s)
- Mahsa Parvizian
- Department of Chemistry, University of Basel, 4058, Basel, Switzerland
| | | | - Rohan Pokratath
- Department of Chemistry, University of Basel, 4058, Basel, Switzerland
| | - Curran Kalha
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Seungho Lee
- IST Austria, Am Campus 1, 3400, Klosterneuburg, Austria
| | | | - Maria Ibáñez
- IST Austria, Am Campus 1, 3400, Klosterneuburg, Austria
| | - Anna Regoutz
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Jonathan De Roo
- Department of Chemistry, University of Basel, 4058, Basel, Switzerland
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17
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Parvizian M, Balsa AD, Pokratath R, Kalha C, Lee S, Van den Eynden D, Ibáñez M, Regoutz A, De Roo J. The chemistry of Cu3N and Cu3PdN nanocrystals. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | | | - Curran Kalha
- University College London chemistry UNITED KINGDOM
| | - Seungho Lee
- IST Austria: Institute of Science and Technology Austria chemistry AUSTRIA
| | | | - Maria Ibáñez
- IST Austria: Institute of Science and Technology Austria chemistry AUSTRIA
| | - Anna Regoutz
- University College London chemistry UNITED KINGDOM
| | - Jonathan De Roo
- University of Basel: Universitat Basel Chemistry Mattenstrasse 24aBioPark Rosenthal 1096 4058 Basel SWITZERLAND
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18
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Segura Lecina O, Hope MA, Venkatesh A, Björgvinsdóttir S, Rossi K, Loiudice A, Emsley L, Buonsanti R. Colloidal-ALD-Grown Hybrid Shells Nucleate via a Ligand-Precursor Complex. J Am Chem Soc 2022; 144:3998-4008. [PMID: 35195415 DOI: 10.1021/jacs.1c12538] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Colloidal atomic layer deposition (c-ALD) enables the growth of hybrid organic-inorganic oxide shells with tunable thickness at the nanometer scale around ligand-functionalized inorganic nanoparticles (NPs). This recently developed method has demonstrated improved stability of NPs and of their dispersions, a key requirement for their application. Nevertheless, the mechanism by which the inorganic shells form is still unknown, as is the nature of multiple complex interfaces between the NPs, the organic ligands functionalizing the surface, and the shell. Here, we demonstrate that carboxylate ligands are the key element that enables the synthesis of these core-shell structures. Dynamic nuclear polarization surface-enhanced nuclear magnetic resonance spectroscopy (DNP SENS) in combination with density functional theory (DFT) structure calculations shows that the addition of the aluminum organometallic precursor forms a ligand-precursor complex that interacts with the NP surface. This ligand-precursor complex is the first step for the nucleation of the shell and enables its further growth.
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Affiliation(s)
- Ona Segura Lecina
- Laboratory of Nanochemistry for Energy, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland
| | - Michael A Hope
- Laboratory of Magnetic Resonance, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Amrit Venkatesh
- Laboratory of Magnetic Resonance, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Snædís Björgvinsdóttir
- Laboratory of Magnetic Resonance, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Kevin Rossi
- Laboratory of Nanochemistry for Energy, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland
| | - Anna Loiudice
- Laboratory of Nanochemistry for Energy, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland
| | - Lyndon Emsley
- Laboratory of Magnetic Resonance, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Raffaella Buonsanti
- Laboratory of Nanochemistry for Energy, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland
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19
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Naqvi SMZA, Zhang Y, Ahmed S, Abdulraheem MI, Hu J, Tahir MN, Raghavan V. Applied surface enhanced Raman Spectroscopy in plant hormones detection, annexation of advanced technologies: A review. Talanta 2022; 236:122823. [PMID: 34635213 DOI: 10.1016/j.talanta.2021.122823] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/20/2021] [Accepted: 08/22/2021] [Indexed: 12/13/2022]
Abstract
Plant hormones are the molecules that control the vigorous development of plants and help to cope with the stress conditions efficiently due to vital and mechanized physiochemical regulations. Biologists and analytical chemists, both endorsed the extreme problems to quantify plant hormones due to their low level existence in plants and the technological support is devastatingly required to established reliable and efficient detection methods of plant hormones. Surface Enhanced Raman Spectroscopy (SERS) technology is becoming vigorously favored and can be used to accurately and specifically identify biological and chemical molecules. Subsistence molecular properties with varying excitation wavelength require the pertinent substrate to detect SERS signals from plant hormones. Three typical mechanisms of Raman signal enhancement have been discovered, electromagnetic, chemical and Tip-enhanced Raman spectroscopy (TERS). Though, complex detection samples hinder in consistent and reproducible results of SERS-based technology. However, different algorithmic models applied on preprocessed data enhanced the prediction performances of Raman spectra by many folds and decreased the fluorescence value. By incorporating SERS measurements into the microfluidic platform, further highly repeatable SERS results can be obtained. This review paper tends to study the fundamental working principles, methods, applications of SERS systems and their execution in experiments of rapid determination of plant hormones as well as several ways of integrated SERS substrates. The challenges to develop an SERS-microfluidic framework with reproducible and accurate results for plant hormone detection are discussed comprehensively and highlighted the key areas for future investigation briefly.
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Affiliation(s)
- Syed Muhammad Zaigham Abbas Naqvi
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China; Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China.
| | - Yanyan Zhang
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China; Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China.
| | - Shakeel Ahmed
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China; Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China.
| | - Mukhtar Iderawumi Abdulraheem
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China; Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China; Oyo State College of Education, Lanlate, 202001, Nigeria.
| | - Jiandong Hu
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China; Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China.
| | - Muhammad Naveed Tahir
- Department of Agronomy, PMAS-Arid Agriculture University Rawalpindi, 46300, Pakistan.
| | - Vijaya Raghavan
- Department of Bioresource Engineering, Faculty of Agriculture and Environmental Studies, McGill University, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada
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20
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Fan Y, You E, Xu Z, Lin W. A Substrate-Binding Metal-Organic Layer Selectively Catalyzes Photoredox Ene-Carbonyl Reductive Coupling Reactions. J Am Chem Soc 2021; 143:18871-18876. [PMID: 34738806 DOI: 10.1021/jacs.1c10180] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intermolecular photoredox ene-carbonyl reductive coupling reactions typically have low product selectivity owing to competing dimerization and/or reduction of ketyl radicals. Herein, we report a metal-organic layer (MOL), Hf-Ir-OTf, as a bifunctional photocatalyst for selective photoredox reductive coupling of ketones or aldehydes with electron-deficient alkenes. Composed of iridium-based photosensitizers (Ir-PSs) and triflated Hf12 clusters, Hf-Ir-OTf uses Lewis acidic Hf sites to bind and activate electron-deficient alkenes to accept ketyl radicals generated by adjacent Ir-PSs, thereby suppressing undesired dimerization and reduction of ketyl radicals to enhance the selectivity for the cross-coupling products. The MOL-catalyzed reductive coupling reaction accommodates a variety of olefinic substrates and tolerates reducible groups, nicely complementing current methods for cross-coupling reactions.
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Affiliation(s)
- Yingjie Fan
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Eric You
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Ziwan Xu
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Wenbin Lin
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
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21
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Wang Y, Coppel Y, Lepetit C, Marty JD, Mingotaud C, Kahn ML. Anisotropic growth of ZnO nanoparticles driven by the structure of amine surfactants: the role of surface dynamics in nanocrystal growth. NANOSCALE ADVANCES 2021; 3:6088-6099. [PMID: 36133935 PMCID: PMC9418458 DOI: 10.1039/d1na00566a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 08/11/2021] [Indexed: 05/15/2023]
Abstract
Herein, we elucidate the key role of amine surfactants in the controlled anisotropic growth of ZnO nanoparticles that is achieved under mild conditions by organometallic hydrolysis. The structuring influence of alkyl substituents on the nitrogen atom of amines is jointly analyzed theoretically by DFT modeling, and experimentally by multinuclear NMR (1H, 13C and 17O) spectroscopy. We demonstrate that in initial steps leading to the growth of colloidal ZnO particles, the nature of molecular species that are involved in the solution strongly depends on the structure of the amine surfactant. By using tertiary, secondary or primary amines, no or weak adducts between the amine and zinc, or stable adducts, or adduct oligomers were identified, respectively. Afterwards, following the course of the reaction, the dynamic behavior of the amines on the grown ZnO nanocrystal surfaces is also strongly correlated with their structure. We identified that in the presence of tertiary, secondary or primary amines, no significant [Zn⋯N] adsorption, or surface adsorption with notable surface mobility, or a very strong adsorption is achieved, respectively. The last case, primary amines, significantly involves the structuring of a hydrogen bonding network. Therefore, such surface dynamic behavior has a predominant role in driving the nanocrystal growth, and orienting the ZnO material final morphology. By forming hydrogen bonds at the nanoparticle surface during the growth process, primary amines specifically lead to the formation of nanorods. Conversely, isotropic nanoparticles and aggregates are obtained when secondary and tertiary amines are used, respectively. These findings shed light on the role of weak surface interactions, herein H-bonding, that rule the growth of nano-objects and are as such crucial to identify, study, and control for achieving progress in nanoscience.
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Affiliation(s)
- Yinping Wang
- Laboratoire de Chimie de Coordination, CNRS, UPR-8241 205 route de Narbonne 31077 Toulouse Cedex 04 France
- Laboratoire des IMRCP, CNRS UMR 5623, University of Toulouse 118 route de Narbonne 31062 Toulouse Cedex 9 France
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination, CNRS, UPR-8241 205 route de Narbonne 31077 Toulouse Cedex 04 France
| | - Christine Lepetit
- Laboratoire de Chimie de Coordination, CNRS, UPR-8241 205 route de Narbonne 31077 Toulouse Cedex 04 France
| | - Jean-Daniel Marty
- Laboratoire des IMRCP, CNRS UMR 5623, University of Toulouse 118 route de Narbonne 31062 Toulouse Cedex 9 France
| | - Christophe Mingotaud
- Laboratoire des IMRCP, CNRS UMR 5623, University of Toulouse 118 route de Narbonne 31062 Toulouse Cedex 9 France
| | - Myrtil L Kahn
- Laboratoire de Chimie de Coordination, CNRS, UPR-8241 205 route de Narbonne 31077 Toulouse Cedex 04 France
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22
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23
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Lesiak A, Banski M, Halicka K, Cabaj J, Żak A, Podhorodecki A. pH-dependent fluorescence of thiol-coated CdSe/CdS quantum dots in an aqueous phase. NANOTECHNOLOGY 2021; 32:075705. [PMID: 33105119 DOI: 10.1088/1361-6528/abc4a0] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The results presented in this paper show how the optical properties and colloidal stability of quantum dots (QDs) vary depending on pH conditions. For this investigation, as-synthesized hydrophobic CdSe/CdS QDs were transferred to an aqueous medium by surface modification with 3-mercaptopropionic acid. The ligand exchange procedure was applied under three different pH conditions: acidic, neutral and alkaline, to obtain three kinds of hydrophilic QDs dispersed in phosphate buffer. The efficiency of the functionalization of QDs was estimated based on the changes in ABS and the highest value was obtained under acidic conditions (45%). The efficiency of photoluminescence (PL) was also best preserved under these conditions, although it was 30 times less than the PL of hydrophobic QDs. Then, all three kinds of hydrophilic QDs were dispersed in solutions with a wide range of pH (2-12) and investigated by absorbance and PL measurements. The results show that QDs subjected to a ligand exchange procedure are characterized by intensive PL at the selected pH values, which correspond to pKa of the ligand. This phenomenon is independent of the pH at which the ligand exchange procedure is conducted. Moreover, it was found that the PL intensity is preserved during the experiment for QDs functionalized under neutral conditions, whereas it decreases for acidic and increases for alkaline conditions.
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Affiliation(s)
- Anna Lesiak
- Wroclaw University of Science and Technology, Faculty of Chemistry and Faculty of Fundamental Problems of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Mateusz Banski
- Wroclaw University of Science and Technology, Faculty of Fundamental Problems of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Kinga Halicka
- Wroclaw University of Science and Technology, Faculty of Chemistry, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Joanna Cabaj
- Wroclaw University of Science and Technology, Faculty of Chemistry, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Andrzej Żak
- Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Electron Microscopy Laboratory, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Artur Podhorodecki
- Wroclaw University of Science and Technology, Faculty of Fundamental Problems of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
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Imran M, Ramade J, Di Stasio F, De Franco M, Buha J, Van Aert S, Goldoni L, Lauciello S, Prato M, Infante I, Bals S, Manna L. Alloy CsCd x Pb 1-x Br 3 Perovskite Nanocrystals: The Role of Surface Passivation in Preserving Composition and Blue Emission. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2020; 32:10641-10652. [PMID: 33384476 PMCID: PMC7768894 DOI: 10.1021/acs.chemmater.0c03825] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/20/2020] [Indexed: 05/18/2023]
Abstract
Various strategies have been proposed to engineer the band gap of metal halide perovskite nanocrystals (NCs) while preserving their structure and composition and thus ensuring spectral stability of the emission color. An aspect that has only been marginally investigated is how the type of surface passivation influences the structural/color stability of AMX3 perovskite NCs composed of two different M2+ cations. Here, we report the synthesis of blue-emitting Cs-oleate capped CsCd x Pb1-x Br3 NCs, which exhibit a cubic perovskite phase containing Cd-rich domains of Ruddlesden-Popper phases (RP phases). The RP domains spontaneously transform into pure orthorhombic perovskite ones upon NC aging, and the emission color of the NCs shifts from blue to green over days. On the other hand, postsynthesis ligand exchange with various Cs-carboxylate or ammonium bromide salts, right after NC synthesis, provides monocrystalline NCs with cubic phase, highlighting the metastability of RP domains. When NCs are treated with Cs-carboxylates (including Cs-oleate), most of the Cd2+ ions are expelled from NCs upon aging, and the NCs phase evolves from cubic to orthorhombic and their emission color changes from blue to green. Instead, when NCs are coated with ammonium bromides, the loss of Cd2+ ions is suppressed and the NCs tend to retain their blue emission (both in colloidal dispersions and in electroluminescent devices), as well as their cubic phase, over time. The improved compositional and structural stability in the latter cases is ascribed to the saturation of surface vacancies, which may act as channels for the expulsion of Cd2+ ions from NCs.
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Affiliation(s)
- Muhammad Imran
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Julien Ramade
- Electron
Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Francesco Di Stasio
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Manuela De Franco
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Joka Buha
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Sandra Van Aert
- Electron
Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Luca Goldoni
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Simone Lauciello
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Mirko Prato
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Ivan Infante
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
- Department
of Theoretical Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Sara Bals
- Electron
Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Liberato Manna
- Nanochemistry
Department, Photonic Nanomaterials Lab, Analytical Chemistry Lab, Electron Microscopy
Facility, Materials Characterization Facility, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
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25
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Bottari F, Daems E, de Vries AM, Van Wielendaele P, Trashin S, Blust R, Sobott F, Madder A, Martins JC, De Wael K. Do Aptamers Always Bind? The Need for a Multifaceted Analytical Approach When Demonstrating Binding Affinity between Aptamer and Low Molecular Weight Compounds. J Am Chem Soc 2020; 142:19622-19630. [DOI: 10.1021/jacs.0c08691] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fabio Bottari
- AXES Research Group, Department of Bioscience Engineering, University of Antwerp, Antwerp, 2020, Belgium
| | - Elise Daems
- AXES Research Group, Department of Bioscience Engineering, University of Antwerp, Antwerp, 2020, Belgium
- BAMS Research Group, Department of Chemistry, University of Antwerp, Antwerp, 2020, Belgium
| | - Anne-Mare de Vries
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, 9000, Belgium
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, 9000, Belgium
| | - Pieter Van Wielendaele
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, 2610, Belgium
| | - Stanislav Trashin
- AXES Research Group, Department of Bioscience Engineering, University of Antwerp, Antwerp, 2020, Belgium
| | - Ronny Blust
- Sphere Research Group, Department of Biology, University of Antwerp, Antwerp, 2020, Belgium
| | - Frank Sobott
- BAMS Research Group, Department of Chemistry, University of Antwerp, Antwerp, 2020, Belgium
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Annemieke Madder
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, 9000, Belgium
| | - José C. Martins
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, 9000, Belgium
| | - Karolien De Wael
- AXES Research Group, Department of Bioscience Engineering, University of Antwerp, Antwerp, 2020, Belgium
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26
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Park J, Jang HM, Kim S, Jo SH, Lee TW. Electroluminescence of Perovskite Nanocrystals with Ligand Engineering. TRENDS IN CHEMISTRY 2020. [DOI: 10.1016/j.trechm.2020.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Nagy LN, Dhaene E, Szigyártó IC, Mihály J, May Z, Varga Z, Van Driessche I, Martins JC, Fehér K. An unsought and expensive way to make gold nanoparticles on the way to the development of SiO2@ZrO2 nanocarriers for cancer vaccination. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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28
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Grisorio R, Fanizza E, Allegretta I, Altamura D, Striccoli M, Terzano R, Giannini C, Vergaro V, Ciccarella G, Margiotta N, Suranna GP. Insights into the role of the lead/surfactant ratio in the formation and passivation of cesium lead bromide perovskite nanocrystals. NANOSCALE 2020; 12:623-637. [PMID: 31829364 DOI: 10.1039/c9nr08079a] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This study aims at rationalizing the effects of the lead/surfactant ratio on the structural evolution of cesium lead-bromide perovskite nanocrystals (NCs), ascertaining how their shape and surface composition can be modulated by suitably adjusting the ligand amount (an equivolumetric mixture of oleic acid and oleyl amine) relatively to lead bromide. The tailoring of the reaction conditions allows the obtainment of blue-emitting CsPbBr3 nanoplatelets in the presence of ligand excess, while green-emitting nanocubes are achieved under low-surfactant conditions. An insight into the NC's shape evolution dictated by the different reaction conditions suggests that the generation of CsPbBr3 nanoplatelets is controlled by the dimensions of [(RNH3)2(PbBr4)]n layers formed before the injection of cesium oleate. The growth step promoted by preformed layers is concomitant to (but independent from) the nucleation process of lead-based species, leading to centrosymmetric nanocubes (prevalent in low-surfactant regimes) or Cs4PbBr6 NCs (prevalent in high-surfactant regimes). The proposed NC growth is supported by the analysis of the optical properties of non-purified samples, which reveal the selective presence of structures endowed with four cell unit average thickness accompanying larger emissive nanocubes. By combining nuclear magnetic resonance (NMR) and UV-Vis spectroscopy techniques, it is ascertained that the lead/surfactant ratio also controls the relative proportion between lead-based species (PBr2, PbBr3-, PbBr42- and plausibly PbBr53- or PbBr64-) formed before cesium injection, which regulate the size of [(RNH3)2(PbBr4)]n layers as well as the formation of Cs4PbBr6 NCs during the nucleation stage. The surface chemistry of the differently structured perovskite NCs is investigated by correlating the elemental composition of the nanoparticles with specific NMR signals ascribable to the surface ligands. This level of investigation also sheds light on the stability of the time-dependent fluorescence exhibited by differently composed perovskite NCs before the loss of their colloidal integrity. Our findings can bring about a fine tuning of the synthetic methods currently employed for controlling the shape and surface chemistry of perovskite NCs.
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Affiliation(s)
- Roberto Grisorio
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy.
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29
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Arcudi F, Westmoreland DE, Weiss EA. Colloidally Stable CdS Quantum Dots in Water with Electrostatically Stabilized Weak-Binding, Sulfur-Free Ligands. Chemistry 2019; 25:14469-14474. [PMID: 31486120 DOI: 10.1002/chem.201903908] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Indexed: 01/19/2023]
Abstract
Colloidal quantum dot (QD) photocatalysts have the electrochemical and optical properties to be highly effective for a range of redox reactions. QDs are proven photo-redox catalysts for a variety of reactions in organic solvents but are less prominent for aqueous reactions. Aqueous QD photocatalysts require hydrophilic ligand shells that provide long-term colloidal stability but are not so tight-binding as to prevent catalytic substrates from accessing the QD surface. Common thiolate ligands, which also poison many co-catalysts and undergo photo-oxidative desorption, are therefore often not an option. This paper describes a framework for the design of water-solubilizing ligands that are in dynamic exchange on and off the QD surface, but still provide long-term colloidal stability to CdS QDs. The binding affinity and inter-ligand electrostatic interactions of a bifunctional ligand, aminoethyl phosphonic acid (AEP), are tuned with the pH of the dispersion. The key to colloidal stability is electrostatic stabilization of the monolayer. This work demonstrates a means of mimicking the stabilizing power of a thiolate-bound ligand with a zwitterionic tail group, but without the thiolate binding group.
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Affiliation(s)
- Francesca Arcudi
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL-60208-3113, USA
| | - Dana Emily Westmoreland
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL-60208-3113, USA
| | - Emily Allyn Weiss
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL-60208-3113, USA
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30
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Schechtel E, Dören R, Frerichs H, Panthöfer M, Mondeshki M, Tremel W. Mixed Ligand Shell Formation upon Catechol Ligand Adsorption on Hydrophobic TiO 2 Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12518-12531. [PMID: 31487189 DOI: 10.1021/acs.langmuir.9b02496] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Modifying the surfaces of metal oxide nanoparticles (NPs) with monolayers of ligands provides a simple and direct method to generate multifunctional coatings by altering their surface properties. This works best if the composition of the monolayers can be controlled. Mussel-inspired, noninnocent catecholates stand out from other ligands like carboxylates and amines because they are redox-active and allow for highly efficient surface binding and enhanced electron transfer to the surface. However, a comprehensive understanding of their surface chemistry, including surface coverage and displacement of the native ligand, is still lacking. Here, we unravel the displacement of oleate (OA) ligands on hydrophobic, OA-stabilized TiO2 NPs by catecholate ligands using a combination of one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy techniques. Conclusive pictures of the ligand shells before and after surface modification with catecholate were obtained by 1H and 13C NMR spectroscopy (the 13C chemical shift being more sensitive and with a broader range). The data could be explained using a Langmuir-type approach. Gradual formation of a mixed ligand shell was observed, and the surface processes of catecholate adsorption and OA desorption were quantified. Contrary to the prevailing view, catecholate displaces only a minor fraction (∼20%) of the native OA ligand shell. At the same time, the total ligand density more than doubled from 2.3 nm-2 at native oleate coverage to 4.8 nm-2 at maximum catecholate loading. We conclude that the catecholate ligand adsorbs preferably to unoccupied Ti surface sites rather than replacing native OA ligands. This unexpected behavior, reminiscent of the Vroman effect for protein corona formation, appears to be a fundamental feature in the widely used surface modification of hydrophobic metal oxide NPs with catecholate ligands. Moreover, our findings show that ligand displacement on OA-capped TiO2 NPs is not suited for a full ligand shell refunctionalization because it produces only mixed ligand shells. Therefore, our results contribute to a better understanding and performance of photocatalytic applications based on catecholate ligand-sensitized TiO2 NPs.
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Affiliation(s)
- Eugen Schechtel
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - René Dören
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Hajo Frerichs
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Martin Panthöfer
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Mihail Mondeshki
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität Mainz , Duesbergweg 10-14 , D-55128 Mainz , Germany
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31
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Zhang J, Zhang H, Cao W, Pang Z, Li J, Shu Y, Zhu C, Kong X, Wang L, Peng X. Identification of Facet-Dependent Coordination Structures of Carboxylate Ligands on CdSe Nanocrystals. J Am Chem Soc 2019; 141:15675-15683. [PMID: 31503473 DOI: 10.1021/jacs.9b07836] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Aliphatic carboxylates are the most common class of surface ligands to stabilize colloidal nanocrystals. The widely used approach to identify the coordination modes between surface cationic sites and carboxylate ligands is based on the empirical infrared (IR) spectroscopic assignment, which is often ambiguous and thus hampers the practical control of surface structures. In this report, multiple techniques based on nuclear magnetic resonance (NMR) and IR spectra are applied to distinguish the different coordination structures in a series of zinc-blende CdSe nanocrystals with unique facet structures, including nanoplatelets dominated with {100} basal planes, hexahedrons with only three types of low-index facets (i.e., {100}, {110}, and {111}), and spheroidal dots without well-defined facets. Interpretation and assignment of NMR and IR signals were assisted by density functional theory (DFT) calculations. In addition to the identification of facet-sensitive bonding modes, the present methods also allow a nondestructive quantification of mixed ligands.
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Affiliation(s)
- Jun Zhang
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Haibing Zhang
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Weicheng Cao
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Zhenfeng Pang
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Jiongzhao Li
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Yufei Shu
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Chenqi Zhu
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Xueqian Kong
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Linjun Wang
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
| | - Xiaogang Peng
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , P. R. China
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32
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Grisorio R, Quarta D, Fiore A, Carbone L, Suranna GP, Giansante C. The dynamic surface chemistry of colloidal metal chalcogenide quantum dots. NANOSCALE ADVANCES 2019; 1:3639-3646. [PMID: 36133571 PMCID: PMC9417341 DOI: 10.1039/c9na00452a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 07/29/2019] [Indexed: 05/03/2023]
Abstract
The chemical species (ligands) at the surface of colloidal inorganic semiconductor nanocrystals (QDs) mediate their interactions with the surroundings. The solvation of the QDs reflects a subtle interplay between ligand-solvent and ligand-ligand interactions, which eventually compete with the coordination of the ligands at the QD surface. The QD surface coordination and solvation are indeed fundamental to preserve their optoelectronic properties and to foster the effective application of QD-based inks and nanocomposites. Here we investigate such ligand interactions by exploiting diffusion ordered NMR spectroscopy (DOSY), which is suggested as an essential complement to spectral line width analysis. To this end, we use colloidal metal chalcogenide (CdS, CdSe, and PbS) QDs with (metal-)oleate ligands at their surface in several solvents exhibiting different viscosities and polarities. We demonstrate that the ligand shell is dynamically bound to the metal chalcogenide QDs, and is thus in equilibrium between the QD surface and the surrounding solvent. Such dynamic equilibria depend on ligand-solvent interactions, which are more prominent in aliphatic, rather polar solvents that favor the solvation of the ligands and, as a consequence, their displacement from the QD surface. In addition, the ligand-ligand interactions, which are more relevant for larger QDs, contribute to the stabilization of the ligand bonding at the QD surface.
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Affiliation(s)
- Roberto Grisorio
- CNR NANOTEC, Istituto di Nanotecnologia via Monteroni 73100 Lecce Italy
- DICATECh - Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari via Orabona 4 70125 Bari Italy
| | - Danila Quarta
- CNR NANOTEC, Istituto di Nanotecnologia via Monteroni 73100 Lecce Italy
- Dipartimento di Matematica e Fisica 'E. De Giorgi', Università del Salento via per Arnesano 73100 Lecce Italy
| | - Angela Fiore
- CNR NANOTEC, Istituto di Nanotecnologia via Monteroni 73100 Lecce Italy
- Dipartimento di Matematica e Fisica 'E. De Giorgi', Università del Salento via per Arnesano 73100 Lecce Italy
| | - Luigi Carbone
- CNR NANOTEC, Istituto di Nanotecnologia via Monteroni 73100 Lecce Italy
| | - Gian Paolo Suranna
- CNR NANOTEC, Istituto di Nanotecnologia via Monteroni 73100 Lecce Italy
- DICATECh - Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari via Orabona 4 70125 Bari Italy
| | - Carlo Giansante
- CNR NANOTEC, Istituto di Nanotecnologia via Monteroni 73100 Lecce Italy
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33
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Boles MA, Talapin DV. Binary Assembly of PbS and Au Nanocrystals: Patchy PbS Surface Ligand Coverage Stabilizes the CuAu Superlattice. ACS NANO 2019; 13:5375-5384. [PMID: 31017762 DOI: 10.1021/acsnano.9b00006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Self-assembly of two sizes of nearly spherical colloidal nanocrystals (NCs) capped with hydrocarbon surface ligands has been shown to produce more than 20 distinct phases of binary nanocrystal superlattices (BNSLs). Such structural diversity, in striking contrast to binary systems of micron-sized colloidal beads, cannot be rationalized by models assuming entropy-driven crystallization of simple spheres. In this work, we show that the PbS ligand binding equilibrium controls the relative stability of two closely related BNSL structures featuring alternating layers of PbS and Au NCs. At an intermediate size ratio, as-prepared PbS NCs assemble with Au NCs into CuAu BNSLs featuring orientational coherence of PbS NCs across the lattice. Measurement of interparticle separations within CuAu and modeling of the structure reveal that PbS inorganic cores are nearly in contact through (100) NC surfaces in the square tiling of the CuAu basal plane. On the other hand, AlB2 BNSLs with PbS NCs packed in random orientations were found to be the dominant self-assembly product when the same binary NC solution was evaporated in the presence of added oleic acid (OAH). Solution nuclear magnetic resonance titration experiments confirmed that added OAH binds to PbS NCs, implicating ligand surface coverage as an important factor influencing the relative stability of CuAu and AlB2 BNSLs at the experimental size ratio. From these results, we conclude that as-prepared PbS NCs feature sparsely covered (100) surfaces and thus effectively flat patches along NC x-, y-, and z-directions. Such anisotropic PbS-PbS interactions can be efficiently screened by restoring effectively spherical NC shape via addition of OAH to the binary assembly solution. Our findings underscore the important contribution of NC surfaces to superlattice phase stability and offer a strategy for targeted BNSL assembly.
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Affiliation(s)
- Michael A Boles
- Department of Chemistry and James Franck Institute , University of Chicago , Chicago , Illinois 60637 , United States
| | - Dmitri V Talapin
- Department of Chemistry and James Franck Institute , University of Chicago , Chicago , Illinois 60637 , United States
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34
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Bronstein ND, Martinez MS, Kroupa DM, Vörös M, Lu H, Brawand NP, Nozik AJ, Sellinger A, Galli G, Beard MC. Designing Janus Ligand Shells on PbS Quantum Dots using Ligand-Ligand Cooperativity. ACS NANO 2019; 13:3839-3846. [PMID: 30855942 DOI: 10.1021/acsnano.9b00191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present a combined experimental and theoretical study of ligand-ligand cooperativity during X-type carboxylate-to-carboxylate ligand exchange reactions on PbS quantum dot surfaces. We find that the ligand dipole moment (varied through changing the substituents on the benzene ring of cinnamic acid derivatives) impacts the ligand-exchange isotherms; in particular, ligands with large electron withdrawing character result in a sharper transition from an oleate-dominated ligand shell to a cinnamate-dominated ligand shell. We developed a two-dimensional lattice model to simulate the ligand-exchange isotherms that accounts for the difference in ligand binding energy as well as ligand-ligand cooperativity. Our model shows that ligands with larger ligand-ligand coupling energy exhibit sharper isotherms indicating an order-disorder phase transition. Finally, we developed an anisotropic Janus ligand shell by taking advantage of the ligand-ligand cooperative ligand exchanges. We monitored the Janus ligand shell using 19F nuclear magnetic resonance, showing that when the ligand-ligand coupling energy falls within the order region of the phase diagram, Janus ligand shells can be constructed.
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Affiliation(s)
- Noah D Bronstein
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
| | - Marissa S Martinez
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| | - Daniel M Kroupa
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| | - Márton Vörös
- Materials Science Division , Argonne National Laboratory , Lemont , Illinois 60439 , United States
- Institute for Molecular Engineering, University of Chicago , Chicago , Illinois 60637 , United States
| | - Haipeng Lu
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
| | - Nicholas P Brawand
- Institute for Molecular Engineering, University of Chicago , Chicago , Illinois 60637 , United States
| | - Arthur J Nozik
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| | - Alan Sellinger
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
- Department of Chemistry and Materials Science Program , Colorado School of Mines , Golden , Colorado 80401 , United States
| | - Giulia Galli
- Materials Science Division , Argonne National Laboratory , Lemont , Illinois 60439 , United States
- Institute for Molecular Engineering, University of Chicago , Chicago , Illinois 60637 , United States
- Department of Chemistry , University of Chicago , Chicago , Illinois 60637 , United States
| | - Matthew C Beard
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
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35
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Grisorio R, Di Clemente ME, Fanizza E, Allegretta I, Altamura D, Striccoli M, Terzano R, Giannini C, Irimia-Vladu M, Suranna GP. Exploring the surface chemistry of cesium lead halide perovskite nanocrystals. NANOSCALE 2019; 11:986-999. [PMID: 30569929 DOI: 10.1039/c8nr08011a] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Colloidal nanocrystals (NCs) of cesium lead halide perovskites (CsPbX3, X = Cl, Br or I) are emerging as an exciting class of optoelectronic materials, but the retention of their colloidal and structural integrity during isolation, purification and handling still represents a critical issue. The impelling questions concerning their intrinsic chemical instability are connected to the dynamic nature of the bonding between the inorganic surface and the long-chain capping ligands. However, the key aspects of CsPbX3's surface chemistry that directly impact their stability remain elusive. In this contribution, we provide an in-depth investigation of the surface properties of differently composed CsPbX3 NCs, prepared by traditional hot-injection methods. The study, mainly relying on solution NMR spectroscopy, is backed up by elemental analysis as well as morphological, structural and optical investigations. We ascertained that the nature of the ligand adsorption/desorption processes at the NC surface is dependent on its elemental composition, thus explaining the origin of the instability afflicting CsPbI3 NCs. We also evaluated the effect of NC purification as well as of the degradation pathways involving the organic shell on the surface chemistry of CsPbX3 NCs. This study paves the way for new post-functionalization strategies for this promising class of nanomaterials.
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Affiliation(s)
- Roberto Grisorio
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy.
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36
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Wang X, Wang X, Bai X, Yan L, Liu T, Wang M, Song Y, Hu G, Gu Z, Miao Q, Chen C. Nanoparticle Ligand Exchange and Its Effects at the Nanoparticle-Cell Membrane Interface. NANO LETTERS 2019; 19:8-18. [PMID: 30335394 DOI: 10.1021/acs.nanolett.8b02638] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The nanoparticle (nano)-cell membrane interface is one of the most important interactions determining the fate of nanoparticles (NPs), which can stimulate a series of biological events, allowing theranostic and other biomedical applications. So far, there remains a lack of knowledge about the mechanisms governing the nanoparticle-cell membrane interface, especially the impact of ligand exchange, in which molecules on the nanosurface become replaced with components of the cell membrane, resulting in unique interfacial phenomena. Herein, we describe a family of gold nanoparticles (AuNPs) of the same core size (∼13 nm core), modified with 12 different kinds of surface ligands, and the effects of their exchangeable ligands on both nanoparticle-supported lipid bilayers (SLBs) and nanoparticle-natural cell membrane interfaces. The ligands are categorized according to their molecular weight, charge, and bonding modes (physisorption or chemisorption). Importantly, we found that, depending on the adsorption affinity and size of ligand molecules, physisorbed ligands on the surface of NPs can be exchanged with lipid molecules. At a ligand exchange-dominated interface, the AuNPs typically aggregated into an ordered monolayer in the lipid bilayers, subsequently affecting cell membrane integrity, NP uptake efficiency, and the NP endocytosis pathways. These findings advance our understanding of the underlying mechanisms of the biological effects of nanoparticles from a new point of view and will aid in the design of novel, safe, and effective nanomaterials for biomedicine.
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Affiliation(s)
- Xinyi Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, & CAS Center for Excellence in Nanoscience , National Center for Nanoscienceand Technology of China, and University of Chinese Academy of Sciences , Beijing 100190 , China
- College of Sciences , Shenyang Agricultural University , Shenyang 110161 , China
- College of Environment , Liaoning University , Shenyang 110036 , China
| | - Xiaofeng Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics , Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xuan Bai
- The State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics , Chinese Academy of Sciences, and University of Chinese Academy of Sciences , Beijing 100190 , China
| | - Liang Yan
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics , Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Tao Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, & CAS Center for Excellence in Nanoscience , National Center for Nanoscienceand Technology of China, and University of Chinese Academy of Sciences , Beijing 100190 , China
| | - Mingzhe Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, & CAS Center for Excellence in Nanoscience , National Center for Nanoscienceand Technology of China, and University of Chinese Academy of Sciences , Beijing 100190 , China
| | - Youtao Song
- College of Environment , Liaoning University , Shenyang 110036 , China
| | - Guoqing Hu
- The State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics , Chinese Academy of Sciences, and University of Chinese Academy of Sciences , Beijing 100190 , China
| | - Zhanjun Gu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics , Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Qing Miao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, & CAS Center for Excellence in Nanoscience , National Center for Nanoscienceand Technology of China, and University of Chinese Academy of Sciences , Beijing 100190 , China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, & CAS Center for Excellence in Nanoscience , National Center for Nanoscienceand Technology of China, and University of Chinese Academy of Sciences , Beijing 100190 , China
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37
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Zheng Z, Mounsamy M, Lauth-de Viguerie N, Coppel Y, Harrisson S, Destarac M, Mingotaud C, Kahn ML, Marty JD. Luminescent zinc oxide nanoparticles: from stabilization to slow digestion depending on the nature of polymer coating. Polym Chem 2019. [DOI: 10.1039/c8py01387j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PEG-b-PAA and PEG-b-PVPA copolymers stabilize luminescent ZnO NPs in THF and enable their transfer to water.
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Affiliation(s)
- Zhiqin Zheng
- Laboratoire des IMRCP CNRS UMR 5623
- University of Toulouse
- Toulouse Cedex 9
- France
- Laboratoire de Chimie de Coordination CNRS UPR 8241
| | - Margaux Mounsamy
- Laboratoire des IMRCP CNRS UMR 5623
- University of Toulouse
- Toulouse Cedex 9
- France
| | | | - Yannick Coppel
- Laboratoire de Chimie de Coordination CNRS UPR 8241
- University of Toulouse
- 31062 Toulouse Cedex 9
- France
| | - Simon Harrisson
- Laboratoire des IMRCP CNRS UMR 5623
- University of Toulouse
- Toulouse Cedex 9
- France
| | - Mathias Destarac
- Laboratoire des IMRCP CNRS UMR 5623
- University of Toulouse
- Toulouse Cedex 9
- France
| | | | - Myrtil L. Kahn
- Laboratoire de Chimie de Coordination CNRS UPR 8241
- University of Toulouse
- 31062 Toulouse Cedex 9
- France
| | - Jean-Daniel Marty
- Laboratoire des IMRCP CNRS UMR 5623
- University of Toulouse
- Toulouse Cedex 9
- France
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38
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Nenon DP, Pressler K, Kang J, Koscher BA, Olshansky JH, Osowiecki WT, Koc MA, Wang LW, Alivisatos AP. Design Principles for Trap-Free CsPbX3 Nanocrystals: Enumerating and Eliminating Surface Halide Vacancies with Softer Lewis Bases. J Am Chem Soc 2018; 140:17760-17772. [DOI: 10.1021/jacs.8b11035] [Citation(s) in RCA: 320] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- David P. Nenon
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | - Jun Kang
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Brent A. Koscher
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jacob H. Olshansky
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Wojciech T. Osowiecki
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Matthew A. Koc
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Lin-Wang Wang
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - A. Paul Alivisatos
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
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39
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Kirkwood N, Monchen JOV, Crisp RW, Grimaldi G, Bergstein HAC, du Fossé I, van der Stam W, Infante I, Houtepen AJ. Finding and Fixing Traps in II-VI and III-V Colloidal Quantum Dots: The Importance of Z-Type Ligand Passivation. J Am Chem Soc 2018. [PMID: 30375226 DOI: 10.1021/ja-2018-07783h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
Abstract
Energy levels in the band gap arising from surface states can dominate the optical and electronic properties of semiconductor nanocrystal quantum dots (QDs). Recent theoretical work has predicted that such trap states in II-VI and III-V QDs arise only from two-coordinated anions on the QD surface, offering the hypothesis that Lewis acid (Z-type) ligands should be able to completely passivate these anionic trap states. In this work, we provide experimental support for this hypothesis by demonstrating that Z-type ligation is the primary cause of PL QY increase when passivating undercoordinated CdTe QDs with various metal salts. Optimized treatments with InCl3 or CdCl2 afford a near-unity (>90%) photoluminescence quantum yield (PL QY), whereas other metal halogen or carboxylate salts provide a smaller increase in PL QY as a result of weaker binding or steric repulsion. The addition of non-Lewis acidic ligands (amines, alkylammonium chlorides) systematically gives a much smaller but non-negligible increase in the PL QY. We discuss possible reasons for this result, which points toward a more complex and dynamic QD surface. Finally we show that Z-type metal halide ligand treatments also lead to a strong increase in the PL QY of CdSe, CdS, and InP QDs and can increase the efficiency of sintered CdTe solar cells. These results show that surface anions are the dominant source of trap states in II-VI and III-V QDs and that passivation with Lewis acidic Z-type ligands is a general strategy to fix those traps. Our work also provides a method to tune the PL QY of QD samples from nearly zero up to near-unity values, without the need to grow epitaxial shells.
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Affiliation(s)
- Nicholas Kirkwood
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Julius O V Monchen
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ryan W Crisp
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Gianluca Grimaldi
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Huub A C Bergstein
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Indy du Fossé
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ward van der Stam
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ivan Infante
- Department of Theoretical Chemistry, Faculty of Science , Vrije Universiteit Amsterdam , de Boelelaan 1083 , 1081 HV Amsterdam , The Netherlands
| | - Arjan J Houtepen
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
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40
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Kirkwood N, Monchen JOV, Crisp RW, Grimaldi G, Bergstein HAC, du Fossé I, van der Stam W, Infante I, Houtepen AJ. Finding and Fixing Traps in II-VI and III-V Colloidal Quantum Dots: The Importance of Z-Type Ligand Passivation. J Am Chem Soc 2018; 140:15712-15723. [PMID: 30375226 PMCID: PMC6257620 DOI: 10.1021/jacs.8b07783] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
Energy levels in
the band gap arising from surface states can dominate
the optical and electronic properties of semiconductor nanocrystal
quantum dots (QDs). Recent theoretical work has predicted that such
trap states in II–VI and III–V QDs arise only from two-coordinated
anions on the QD surface, offering the hypothesis that Lewis acid
(Z-type) ligands should be able to completely passivate these anionic
trap states. In this work, we provide experimental support for this
hypothesis by demonstrating that Z-type ligation is the primary cause
of PL QY increase when passivating undercoordinated CdTe QDs with
various metal salts. Optimized treatments with InCl3 or
CdCl2 afford a near-unity (>90%) photoluminescence quantum
yield (PL QY), whereas other metal halogen or carboxylate salts provide
a smaller increase in PL QY as a result of weaker binding or steric
repulsion. The addition of non-Lewis acidic ligands (amines, alkylammonium
chlorides) systematically gives a much smaller but non-negligible
increase in the PL QY. We discuss possible reasons for this result,
which points toward a more complex and dynamic QD surface. Finally
we show that Z-type metal halide ligand treatments also lead to a
strong increase in the PL QY of CdSe, CdS, and InP QDs and can increase
the efficiency of sintered CdTe solar cells. These results show that
surface anions are the dominant source of trap states in II–VI
and III–V QDs and that passivation with Lewis acidic Z-type
ligands is a general strategy to fix those traps. Our work also provides
a method to tune the PL QY of QD samples from nearly zero up to near-unity
values, without the need to grow epitaxial shells.
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Affiliation(s)
- Nicholas Kirkwood
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Julius O V Monchen
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ryan W Crisp
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Gianluca Grimaldi
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Huub A C Bergstein
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Indy du Fossé
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ward van der Stam
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ivan Infante
- Department of Theoretical Chemistry, Faculty of Science , Vrije Universiteit Amsterdam , de Boelelaan 1083 , 1081 HV Amsterdam , The Netherlands
| | - Arjan J Houtepen
- Optoelectronic Materials Section, Faculty of Applied Sciences , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
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41
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Almeida G, Ashton OJ, Goldoni L, Maggioni D, Petralanda U, Mishra N, Akkerman QA, Infante I, Snaith HJ, Manna L. The Phosphine Oxide Route toward Lead Halide Perovskite Nanocrystals. J Am Chem Soc 2018; 140:14878-14886. [PMID: 30358392 PMCID: PMC6438589 DOI: 10.1021/jacs.8b08978] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Indexed: 12/18/2022]
Abstract
We report an amine-free synthesis of lead halide perovskite (LHP) nanocrystals, using trioctylphosphine oxide (TOPO) instead of aliphatic amines, in combination with a protic acid (e.g., oleic acid). The overall synthesis scheme bears many similarities to the chemistry behind the preparation of LHP thin films and single crystals, in terms of ligand coordination to the chemical precursors. The acidity of the environment and hence the extent of protonation of the TOPO molecules tune the reactivity of the PbX2 precursor, regulating the size of the nanocrystals. On the other hand, TOPO molecules are virtually absent from the surface of our nanocrystals, which are simply passivated by one type of ligand (e.g., Cs-oleate). Furthermore, our studies reveal that Cs-oleate is dynamically bound to the surface of the nanocrystals and that an optimal surface coverage is critical for achieving high photoluminescence quantum yield. Our scheme delivers NCs with a controlled size and shape: only cubes are formed, with no contamination with platelets, regardless of the reaction conditions that were tested. We attribute such a shape homogeneity to the absence of primary aliphatic amines in our reaction environment, since these are known to promote the formation of nanocrystals with sheet/platelet morphologies or layered phases under certain reaction conditions. The TOPO route is particularly appealing with regard to synthesizing LHP nanocrystals for large-scale manufacturing, as the yield in terms of material produced is close to the theoretical limit: i.e., almost all precursors employed in the synthesis are converted into nanocrystals.
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Affiliation(s)
- Guilherme Almeida
- Department
of Nanochemistry and Analytical Chemistry
Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Olivia J. Ashton
- Clarendon
Laboratory, Department of Physics, University
of Oxford, Parks Road, OX1 3PU, Oxford, U.K.
| | - Luca Goldoni
- Department
of Nanochemistry and Analytical Chemistry
Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Daniela Maggioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Urko Petralanda
- Department
of Nanochemistry and Analytical Chemistry
Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Nimai Mishra
- Department
of Nanochemistry and Analytical Chemistry
Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Quinten A. Akkerman
- Department
of Nanochemistry and Analytical Chemistry
Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Ivan Infante
- Department
of Theoretical Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Henry J. Snaith
- Clarendon
Laboratory, Department of Physics, University
of Oxford, Parks Road, OX1 3PU, Oxford, U.K.
| | - Liberato Manna
- Department
of Nanochemistry and Analytical Chemistry
Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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42
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Interface Engineering Strategies for Fabricating Nanocrystal-Based Organic–Inorganic Nanocomposites. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8081376] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hybrid organic–inorganic nanocomposites have attracted considerable attention because they have the advantages of both conjugated polymers (CPs) and nanocrystals (NCs). Recent developments in the interfacial engineering of CP–NC organic–inorganic nanocomposites enabled the formation of an intimate contact between NCs and CPs, facilitating electronic interactions between these two constituents. To design CP–NC nanocomposites, several approaches have been introduced, including ligand refluxing, direct grafting methods, direct growth of NCs in proximity to CPs, and template-guided strategies. In this review, the general reactions of ligand exchange processes, purification methods, and characterization techniques have been briefly introduced. This is followed by a highlight of recent advances in the synthesis of hybrid CP–NC nanocomposites and newly developed inorganic surface treatments, as well as their applications. An outlook for future directions in this area is also presented.
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Lee SW, Joh H, Seong M, Lee WS, Choi JH, Oh SJ. Transition States of Nanocrystal Thin Films during Ligand-Exchange Processes for Potential Applications in Wearable Sensors. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25502-25510. [PMID: 29968456 DOI: 10.1021/acsami.8b06754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Ligand exchange is an advanced technique for tuning the various properties of nanocrystal (NC) thin films, widely used in the NC thin-film device applications. Understanding how the NC thin films transform into functional thin-film devices upon ligand exchange is essential. Here, we investigated the process of structural transformation and accompanying property changes in the NC thin films, by monitoring the various characteristics of silver (Ag) NC thin films at each stage of the ligand-exchange process. A transition state was identified in which the ligands are partially exchanged, where the NC thin films showed unexpected electromechanical features with high gauge factors up to 300. A model system was established to explain the origin of the high gauge factors, supported by the observation of spontaneously formed nanocracks and metal-insulator transition from the structural analysis and charge transport study, respectively. Taking advantages of the unique electromechanical properties of the NC thin films, we fabricated flexible strain gauge sensor devices with high sensitivity, reliability, and stability. We introduce a one-step fabrication process, namely, "the time- and spatial-selective ligand-exchange process", for the design of low-cost and high-performance wearable sensors that effectively detect human motion, such as finger or neck muscle movement. This study provides a fundamental understanding of the ligand-exchange process in NCs, as well as an insight into the functionalities of the NC thin films for technological applications.
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Affiliation(s)
| | | | | | | | - Ji-Hyuk Choi
- Resource Utilization Research Center , Korea Institute of Geoscience and Mineral Resources , Daejeon 34132 , Republic of Korea
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44
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Anderson NC, Chen PE, Buckley AK, De Roo J, Owen JS. Stereoelectronic Effects on the Binding of Neutral Lewis Bases to CdSe Nanocrystals. J Am Chem Soc 2018; 140:7199-7205. [DOI: 10.1021/jacs.8b02927] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Nicholas C. Anderson
- Department of Chemistry, Columbia University, New York, New York, 10027, United States
| | - Peter. E. Chen
- Department of Chemistry, Columbia University, New York, New York, 10027, United States
| | - Aya K. Buckley
- Department of Chemistry, Columbia University, New York, New York, 10027, United States
| | - Jonathan De Roo
- Department of Chemistry, Columbia University, New York, New York, 10027, United States
| | - Jonathan S. Owen
- Department of Chemistry, Columbia University, New York, New York, 10027, United States
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45
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Kim BH, Yang J, Lee D, Choi BK, Hyeon T, Park J. Liquid-Phase Transmission Electron Microscopy for Studying Colloidal Inorganic Nanoparticles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:1703316. [PMID: 29178589 DOI: 10.1002/adma.201703316] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 09/01/2017] [Indexed: 05/26/2023]
Abstract
For the past few decades, nanoparticles of various sizes, shapes, and compositions have been synthesized and utilized in many different applications. However, due to a lack of analytical tools that can characterize structural changes at the nanoscale level, many of their growth and transformation processes are not yet well understood. The recently developed technique of liquid-phase transmission electron microscopy (TEM) has gained much attention as a new tool to directly observe chemical reactions that occur in solution. Due to its high spatial and temporal resolution, this technique is widely employed to reveal fundamental mechanisms of nanoparticle growth and transformation. Here, the technical developments for liquid-phase TEM together with their application to the study of solution-phase nanoparticle chemistry are summarized. Two types of liquid cells that can be used in the high-vacuum conditions required by TEM are discussed, followed by recent in situ TEM studies of chemical reactions of colloidal nanoparticles. New findings on the growth mechanism, transformation, and motion of nanoparticles are subsequently discussed in detail.
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Affiliation(s)
- Byung Hyo Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jiwoong Yang
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Donghoon Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Back Kyu Choi
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jungwon Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
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46
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Lin W, Schmidt J, Mahler M, Schindler T, Unruh T, Meyer B, Peukert W, Segets D. Influence of Tail Groups during Functionalization of ZnO Nanoparticles on Binding Enthalpies and Photoluminescence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13581-13589. [PMID: 29099602 DOI: 10.1021/acs.langmuir.7b03079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report on the tailoring of ZnO nanoparticle (NP) surfaces by catechol derivatives (CAT) with different functionalities: tert-butyl group (tertCAT), hydrogen (pyroCAT), aromatic ring (naphCAT), ester group (esterCAT), and nitro group (nitroCAT). The influence of electron-donating/-withdrawing properties on enthalpy of ligand binding (ΔH) was resolved and subsequently linked with optical properties. First, as confirmed by ultraviolet/visible (UV/vis) and Fourier transform infrared (FT-IR) spectroscopy results, all CAT molecules chemisorbed to ZnO NPs, independent of the distinct functionality. Interestingly, the ζ-potentials of ZnO after functionalization shifted to more negative values. Then, isothermal titration calorimetry (ITC) and a mass-based method were applied to resolve the heat release during ligand binding and the adsorption isotherm, respectively. However, both heat- and mass-based approaches alone did not fully resolve the binding enthalpy of each molecule adsorbing to the ZnO surface. This is mainly due to the fact that the Langmuir model oversimplifies the underlying adsorption mechanism, at least for some of the tested CAT molecules. Therefore, a new, fitting-free approach was developed to directly access the adsorption enthalpy per molecule during functionalization by dividing the heat release measured via ITC by the amount of bound molecules determined from the adsorption isotherm. Finally, the efficiency of quenching the visible emission caused by ligand binding was investigated by photoluminescence (PL) spectroscopy, which turned out to follow the same trend as the binding enthalpy. Thus, the functionality of ligand molecules governs the binding enthalpy to the particle surface, which in turn, at least in the current case of ZnO, is an important parameter for the quenching of visible emission. We believe that establishing such correlations is an important step toward a more general way of selecting and designing ligand molecules for surface functionalization. This allows developing strategies for tailored colloidal surfaces beyond empirically driven formulation on a case by case basis.
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Affiliation(s)
- Wei Lin
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Haberstraße 9a, 91058 Erlangen, Germany
| | - Jochen Schmidt
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Haberstraße 9a, 91058 Erlangen, Germany
| | - Michael Mahler
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstraße 4, 91058 Erlangen, Germany
| | - Torben Schindler
- Chair of Crystallography and Structural Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Staudtstraße 3, 91058 Erlangen, Germany
| | - Tobias Unruh
- Chair of Crystallography and Structural Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Staudtstraße 3, 91058 Erlangen, Germany
| | - Bernd Meyer
- Interdisciplinary Center for Molecular Materials (ICMM) and Computer-Chemistry-Center (CCC), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Nägelsbachstraße 25, 91052 Erlangen, Germany
| | - Wolfgang Peukert
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Haberstraße 9a, 91058 Erlangen, Germany
| | - Doris Segets
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Haberstraße 9a, 91058 Erlangen, Germany
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Gromova M, Lefrançois A, Vaure L, Agnese F, Aldakov D, Maurice A, Djurado D, Lebrun C, de Geyer A, Schülli TU, Pouget S, Reiss P. Growth Mechanism and Surface State of CuInS2 Nanocrystals Synthesized with Dodecanethiol. J Am Chem Soc 2017; 139:15748-15759. [DOI: 10.1021/jacs.7b07401] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Marina Gromova
- Université Grenoble Alpes, CEA, INAC, MEM, Grenoble 38000, France
| | - Aurélie Lefrançois
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
| | - Louis Vaure
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
| | - Fabio Agnese
- Université Grenoble Alpes, CEA, INAC, MEM, Grenoble 38000, France
| | - Dmitry Aldakov
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
| | - Axel Maurice
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
| | - David Djurado
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
| | - Colette Lebrun
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
| | - Arnaud de Geyer
- Université Grenoble Alpes, CEA, INAC, MEM, Grenoble 38000, France
| | - Tobias U. Schülli
- The European Synchrotron ESRF, BP 220, Grenoble 38043 Cedex 9, France
| | - Stéphanie Pouget
- Université Grenoble Alpes, CEA, INAC, MEM, Grenoble 38000, France
| | - Peter Reiss
- Université Grenoble Alpes, CEA, CNRS, INAC, UMR5819 SyMMES, Grenoble 38000, France
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Whitham K, Hanrath T. Formation of Epitaxially Connected Quantum Dot Solids: Nucleation and Coherent Phase Transition. J Phys Chem Lett 2017; 8:2623-2628. [PMID: 28530835 DOI: 10.1021/acs.jpclett.7b00846] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The formation of epitaxially connected quantum dot solids involves a complex interplay of interfacial assembly, surface chemistry, and irreversible-directed attachment. We describe the basic mechanism in the context of a coherent phase transition with distinct nucleation and propagation steps. The proposed mechanism explains how defects in the preassembled structure influence nucleation and how basic geometric relationships govern the transformation from hexagonal assemblies of isolated dots to interconnected solids with square symmetry. We anticipate that new mechanistic insights will guide future advances in the formation of high-fidelity quantum dot solids with enhanced grain size, interconnectivity, and control over polymorph structures.
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Affiliation(s)
- Kevin Whitham
- Department of Materials Science and Engineering, and ‡Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University , Ithaca, New York 14853, United States
| | - Tobias Hanrath
- Department of Materials Science and Engineering, and ‡Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University , Ithaca, New York 14853, United States
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49
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Reinhart CC, Johansson E. Colloidal 3-Mercaptopropionic Acid Capped Lead Sulfide Quantum Dots in a Low Boiling Point Solvent. J Am Chem Soc 2017; 139:5827-5835. [PMID: 28394592 DOI: 10.1021/jacs.7b00158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Colloidal 3-mercaptopropionic acid (3-MPA) capped lead sulfide quantum dots were prepared in a variety of organic solvents stabilized with a quaternary ammonium halide salt. The stabilized colloids' optical properties were studied through optical absorption and emission spectroscopy and found to be dependent on both the concentration of a new ligand and stabilizer, and sample age. Nanocrystal ligand chemistry was studied through a combination of 1H NMR and two-dimensional Nuclear Overhauser Effect Spectroscopy (NOESY) which revealed full displacement of the original oleate ligand to form a dynamically exchanging ligand shell. The colloids were studied optically and via NMR as they aged and revealed a quantitative conversion of monomeric 3-mercaptopropionic acid to its dimer, dithiodipropionic acid (dTdPA).
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Affiliation(s)
- Chase C Reinhart
- Department of Chemistry, Portland State University , 1719 SW 10th Avenue, Portland, Oregon 97201, United States
| | - Erik Johansson
- Department of Chemistry, Portland State University , 1719 SW 10th Avenue, Portland, Oregon 97201, United States
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50
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Gupta A, Arunachalam V, Vasudevan S. Liquid-Phase Exfoliation of MoS 2 Nanosheets: The Critical Role of Trace Water. J Phys Chem Lett 2016; 7:4884-4890. [PMID: 27934056 DOI: 10.1021/acs.jpclett.6b02405] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Sonication-assisted liquid-phase exfoliation of layered materials in suitable organic solvents offers a simple scalable route for the production of 2D nanomaterials. N-methyl-2-pyrrolidone (NMP) is one of the most efficient solvents for liquid-phase exfoliation of a variety of layered solids, including MoS2. We show here that trace water present in NMP is crucial for the stability of MoS2 nanosheets in NMP dispersions. In the absence of water, the sheets are fragmented and chemically unstable. Using solution NMR techniques, 2D nuclear Overhauser effect and spin-lattice relaxation measurements, supported by classical molecular dynamics simulations, we are able to establish the role of water molecules in stabilizing the dispersion. We show that water molecules are localized at the Mo-terminated edges of the MoS2 sheets, thereby inhibiting chemical erosion of the sheets, and they also exhibit enhanced interactions with the solvent NMP molecules, leading to the stability of the dispersion.
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Affiliation(s)
- Amit Gupta
- Department of Inorganic and Physical Chemistry, Indian Institute of Science , Bangalore 560012, India
| | - Vaishali Arunachalam
- Department of Inorganic and Physical Chemistry, Indian Institute of Science , Bangalore 560012, India
| | - Sukumaran Vasudevan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science , Bangalore 560012, India
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