1
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Wu L, Li Y, Liu GQ, Yu SH. Polytypic metal chalcogenide nanocrystals. Chem Soc Rev 2024; 53:9832-9873. [PMID: 39212091 DOI: 10.1039/d3cs01095c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
By engineering chemically identical but structurally distinct materials into intricate and sophisticated polytypic nanostructures, which often surpass their pure phase objects and even produce novel physical and chemical properties, exciting applications in the fields of photovoltaics, electronics and photocatalysis can be achieved. In recent decades, various methods have been developed for synthesizing a library of polytypic nanocrystals encompassing IV, III-V and II-VI polytypic semiconductors. The exceptional performances of polytypic metal chalcogenide nanocrystals have been observed, making them highly promising candidates for applications in photonics and electronics. However, achieving high-precision control over the morphology, composition, crystal structure, size, homojunctions, and periodicity of polytypic metal chalcogenide nanostructures remains a significant synthetic challenge. This review article offers a comprehensive overview of recent progress in the synthesis and control of polytypic metal chalcogenide nanocrystals using colloidal synthetic strategies. Starting from a concise introduction on the crystal structures of metal chalcogenides, the subsequent discussion delves into the colloidal synthesis of polytypic metal chalcogenide nanocrystals, followed by an in-depth exploration of the key factors governing polytypic structure construction. Subsequently, we provide comprehensive insights into the physical properties of polytypic metal chalcogenide nanocrystals, which exhibit strong correlations with their applications. Thereafter, we emphasize the significance of polytypic nanostructures in various applications, such as photovoltaics, photocatalysis, transistors, thermoelectrics, stress sensors, and the electrocatalytic hydrogen evolution. Finally, we present a summary of the recent advancements in this research field and provide insightful perspectives on the forthcoming challenges, opportunities, and future research directions.
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Affiliation(s)
- Liang Wu
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
| | - Yi Li
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
| | - Guo-Qiang Liu
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
| | - Shu-Hong Yu
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
- Department of Chemistry, Institute of Innovative Materials, Department of Materials Science and Engineering, Southern University of Science and Technology of China, Shenzhen 518055, China.
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2
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Endres EJ, Bairan Espano JR, Koziel A, Peng AR, Shults AA, Macdonald JE. Controlling Phase in Colloidal Synthesis. ACS NANOSCIENCE AU 2024; 4:158-175. [PMID: 38912287 PMCID: PMC11191733 DOI: 10.1021/acsnanoscienceau.3c00057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 06/25/2024]
Abstract
A fundamental precept of chemistry is that properties are manifestations of the elements present and their arrangement in space. Controlling the arrangement of atoms in nanocrystals is not well understood in nanocrystal synthesis, especially in the transition metal chalcogenides and pnictides, which have rich phase spaces. This Perspective will cover some of the recent advances and current challenges. The perspective includes introductions to challenges particular to chalcogenide and pnictide chemistry, the often-convoluted roles of bond dissociation energies and mechanisms by which precursors break down, using very organized methods to map the synthetic phase space, a discussion of polytype control, and challenges in characterization, especially for solving novel structures on the nanoscale and time-resolved studies.
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Affiliation(s)
| | | | | | | | | | - Janet E. Macdonald
- Department of Chemistry, Vanderbilt
University, 2301 Vanderbilt Place, Nashville, Tennessee 37235, United States
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3
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Aragoni MC, Podda E, Chaudhary S, Bhasin AKK, Bhasin KK, Coles SJ, Orton JB, Isaia F, Lippolis V, Pintus A, Slawin AMZ, Woollins JD, Arca M. An Experimental and Theoretical Insight into I 2 /Br 2 Oxidation of Bis(pyridin-2-yl)Diselane and Ditellane. Chem Asian J 2023; 18:e202300836. [PMID: 37843415 DOI: 10.1002/asia.202300836] [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: 09/23/2023] [Revised: 10/12/2023] [Accepted: 10/12/2023] [Indexed: 10/17/2023]
Abstract
The reactivity between bis(pyridin-2-yl)diselane o Py2 Se2 and ditellane o Py2 Te2 (L1 and L2, respectively; o Py=pyridyn-2-yl) and I2 /Br2 is discussed. Single-crystal structure analysis revealed that the reaction of L1 with I2 yielded [(HL1+ )(I- )⋅5/2I2 ]∞ (1) in which monoprotonated cations HL1+ template a self-assembled infinite pseudo-cubic polyiodide 3D-network, while the reaction with Br2 yielded the dibromide Ho PySeII Br2 (2). The oxidation of L2 with I2 and Br2 yielded the compounds Ho PyTeII I2 (3) and Ho PyTeIV Br4 (6), respectively, whose structures were elucidated by X-ray diffraction analysis. FT-Raman spectroscopy measurements are consistent with a 3c-4e description of all the X-Ch-X three-body systems (Ch=Se, Te; X=Br, I) in compounds 2, 3, Ho PyTeII Br2 (5), and 6. The structural and spectroscopic observations are supported by extensive theoretical calculations carried out at the DFT level that were employed to study the electronic structure of the investigated compounds, the thermodynamic aspects of their formation, and the role of noncovalent σ-hole halogen and chalcogen bonds in the X⋅⋅⋅X, X⋅⋅⋅Ch and Ch⋅⋅⋅Ch interactions evidenced structurally.
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Affiliation(s)
- M Carla Aragoni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042, Monserrato (Cagliari), Italy
| | - Enrico Podda
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042, Monserrato (Cagliari), Italy
- Centro Servizi di Ateneo per la Ricerca (CeSAR), Università degli Studi di Cagliari, S.S. 554 bivio Sestu, 09042, Monserrato (Cagliari), Italy
| | - Savita Chaudhary
- Department of Chemistry, Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Aman K K Bhasin
- Department of Chemistry, Amity University, Sector 82 A, Mohali, Punjab-140306, India
| | - Kuldip K Bhasin
- Department of Chemistry, Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Simon J Coles
- UK National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - James B Orton
- UK National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Francesco Isaia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042, Monserrato (Cagliari), Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042, Monserrato (Cagliari), Italy
| | - Anna Pintus
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042, Monserrato (Cagliari), Italy
| | - Alexandra M Z Slawin
- EaStCHEM School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, UK
| | - J Derek Woollins
- EaStCHEM School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, UK
- Department of Chemistry, Khalifa University, Abu Dhabi, 127788, United Arab Emirates
| | - Massimiliano Arca
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042, Monserrato (Cagliari), Italy
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4
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Abusa Y, Yox P, Cady SD, Viswanathan G, Opare-Addo J, Smith EA, Mudryk Y, Lebedev OI, Perras FA, Kovnir K. Make Selenium Reactive Again: Activating Elemental Selenium for Synthesis of Metal Selenides Ranging from Nanocrystals to Large Single Crystals. J Am Chem Soc 2023; 145:22762-22775. [PMID: 37813388 DOI: 10.1021/jacs.3c08637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
The inertness of elemental selenium is a significant obstacle in the synthesis of selenium-containing materials at low reaction temperatures. Over the years, several recipes have been developed to overcome this hurdle; however, most of the methods are associated with the use of highly toxic, expensive, and environmentally harmful reagents. As such, there is an increasing demand for the design of cheap, stable, and nontoxic reactive selenium precursors usable in the low-temperature synthesis of transition metal selenides with vast applications in nanotechnology, thermoelectrics, and superconductors. Herein, a novel synthetic route has been developed for activating elemental selenium by using a solvothermal approach. By comprehensive 77Se NMR, Raman, and infrared spectroscopies and gas chromatography-mass spectrometry, we show that the activated Se solution contained HSe-, [Se-Se]2-, and Se2- ions, as well as dialkyl selenide (R2Se) and dialkyl diselenide (R-Se-Se-R) species in dynamic equilibrium. This also corresponded to the first observation of naked Se22- in solution. The versatility of the developed Se precursor was demonstrated by the successful synthesis of (i) the polycrystalline room-temperature modification of the β-Ag2Se thermoelectric material; (ii) large single crystals of superconducting β-FeSe; (iii) CdSe nanocrystals with different particle sizes (3-10 nm); (iv) nanosheets of PtSe2; and (v) mono- and dibenzyl selenides and diselenides at room temperature. The simplicity and diversity of the developed Se activation method holds promise for applied and fundamental research.
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Affiliation(s)
- Yao Abusa
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Philip Yox
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Sarah D Cady
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Gayatri Viswanathan
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Jemima Opare-Addo
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Emily A Smith
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Yaroslav Mudryk
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Oleg I Lebedev
- Laboratoire CRISMAT, ENSICAEN, CNRS UMR 6508, 14050 Caen, France
| | - Frédéric A Perras
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Kirill Kovnir
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
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5
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Williamson E, Sun Z, Tappan BA, Brutchey RL. Predictive Synthesis of Copper Selenides Using a Multidimensional Phase Map Constructed with a Data-Driven Classifier. J Am Chem Soc 2023; 145:17954-17964. [PMID: 37540836 PMCID: PMC10436277 DOI: 10.1021/jacs.3c05490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Indexed: 08/06/2023]
Abstract
Copper selenides are an important family of materials with applications in catalysis, plasmonics, photovoltaics, and thermoelectrics. Despite being a binary material system, the Cu-Se phase diagram is complex and contains multiple crystal structures in addition to several metastable structures that are not found on the thermodynamic phase diagram. Consequently, the ability to synthetically navigate this complex phase space poses a significant challenge. We demonstrate that data-driven learning can successfully map this phase space in a minimal number of experiments. We combine soft chemistry (chimie douce) synthetic methods with multivariate analyses via classification techniques to enable predictive phase determination. A surrogate model was constructed with experimental data derived from a design matrix of four experimental variables: C-Se bond strength of the selenium precursor, time, temperature, and solvent composition. The reactions in the surrogate model resulted in 11 distinct phase combinations of copper selenide. These data were used to train a classification model that predicts the phase with 95.7% accuracy. The resulting decision tree enabled conclusions to be drawn about how the experimental variables affect the phase and provided prescriptive synthetic conditions for specific phase isolation. This guided the accelerated phase targeting in a minimum number of experiments of klockmannite CuSe, which could not be isolated in any of the reactions used to construct the surrogate model. The reaction conditions that the model predicted to synthesize klockmannite CuSe were experimentally validated, highlighting the utility of this approach.
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Affiliation(s)
- Emily
M. Williamson
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Zhaohong Sun
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Bryce A. Tappan
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Richard L. Brutchey
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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6
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Koziel AC, Goldfarb RB, Endres EJ, Macdonald JE. Molecular Decomposition Routes of Diaryl Diselenide Precursors in Relation to the Phase Determination of Copper Selenides. Inorg Chem 2022; 61:14673-14683. [PMID: 36069603 DOI: 10.1021/acs.inorgchem.2c02042] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1H nuclear magnetic resonance (NMR), 77Se NMR, and powder X-ray diffraction (XRD) were used to monitor the thermal decomposition of diphenyl and dibenzyl diselenide precursors toward the synthesis of copper selenides. Copper was found to promote the decomposition of both precursors. The inorganic nanocrystals and organic byproducts were sensitive to the specific diaryl diselenides and the presence of oleylamine and copper. Molecular mechanistic routes are proposed. Berzelianite (Cu1.8Se), klockmannite (CuSe), umangite (Cu3Se2), and both petřı́čekite (m-CuSe2) and krutaite (p-CuSe2) were identified as products. Multistep transformations between phases were discovered through reactions with the organoselenium precursors, and organic decomposition products are proposed.
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Affiliation(s)
- Alexandra C Koziel
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States.,Vanderbilt Institute for Nanoscale Science and Engineering, Nashville, Tennessee 37235, United States
| | - Ralston B Goldfarb
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Emma J Endres
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States.,Vanderbilt Institute for Nanoscale Science and Engineering, Nashville, Tennessee 37235, United States
| | - Janet E Macdonald
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States.,Vanderbilt Institute for Nanoscale Science and Engineering, Nashville, Tennessee 37235, United States
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7
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Mishra S. Ultra-mild synthesis of nanometric metal chalcogenides using organyl chalcogenide precursors. Chem Commun (Camb) 2022; 58:10136-10153. [PMID: 36004549 DOI: 10.1039/d2cc03458a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis(trialkylsilyl) monochalcogenides and diorganyl dichalcogenides, (R3Si)2E and R2E2 (E = S, Se or Te and R = alkyl, aryl or allyl group), have emerged in the past decade as excellent reagents for the synthesis of metal chalcogenide nanoparticles (NPs) and clusters owing to their ability to transfer the chalcogenide anion (E2-) under ultra-mild conditions and versatility in reacting even with non-conventional metal reagents or being employed in a variety of synthetic methods. In comparison, the related non-silylated diorganyl monochalcogenides R2E have received attention only recently for the solution phase synthesis of metal chalcogenide NPs. In spite of sharing many similarities, these three families of organyl chalcogenides are different in their coordination ability and decomposition behavior, and therefore in reactivities towards metal reagents. This feature article provides a concise overview on the use of these three families as synthons for the ultralow-temperature synthesis of metal chalcogenide nanomaterials, deliberating their different decomposition mechanisms and critically assessing their advantages for certain applications. More specifically, it discusses their usefulness in (i) affording molecular precursors with different kinetic and thermal stabilities, (ii) isolating reactive intermediates for comprehending the mechanism of molecule-to-nanoparticle transformation and, therefore, achieving fine control over the synthesis, (iii) stabilizing isolable metastable or difficult-to-achieve phases, and (iv) yielding complex ternary nanoparticles with controlled stoichiometry or composites with sensitive materials without modifying the characteristics of the latter. Besides providing a perspective on the low-temperature synthesis of nanomaterials, this overview is expected to assist further progress, particularly in the field of R2E, leading to interesting materials including metastable ones for new applications.
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Affiliation(s)
- Shashank Mishra
- Université Claude Bernard Lyon 1, CNRS, UMR 5256, Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), 2 Avenue Albert Einstein, 69626 Villeurbanne, France.
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8
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Dhaene E, Pokratath R, Aalling-Frederiksen O, Jensen KMØ, Smet PF, De Buysser K, De Roo J. Monoalkyl Phosphinic Acids as Ligands in Nanocrystal Synthesis. ACS NANO 2022; 16:7361-7372. [PMID: 35476907 DOI: 10.1021/acsnano.1c08966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ligands play a crucial role in the synthesis of colloidal nanocrystals. Nevertheless, only a handful molecules are currently used, oleic acid being the most typical example. Here, we show that monoalkyl phosphinic acids are another interesting ligand class, forming metal complexes with a reactivity that is intermediate between the traditional carboxylates and phosphonates. We first present the synthesis of n-hexyl, 2-ethylhexyl, n-tetradecyl, n-octadecyl, and oleylphosphinic acid. These compounds are suitable ligands for high-temperature nanocrystal synthesis (240-300 °C) since, in contrast to phosphonic acids, they do not form anhydride oligomers. Consequently, CdSe quantum dots synthesized with octadecylphosphinic acid are conveniently purified, and their UV-vis spectrum is free from background scattering. The CdSe nanocrystals have a low polydispersity and a photoluminescence quantum yield up to 18% (without shell). Furthermore, we could synthesize CdSe and CdS nanorods using phosphinic acid ligands with high shape purity. We conclude that the reactivity toward TOP-S and TOP-Se precursors decreases in the following series: cadmium carboxylate > cadmium phosphinate > cadmium phosphonate. By introducing a third and intermediate class of surfactants, we enhance the versatility of surfactant-assisted syntheses.
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Affiliation(s)
- Evert Dhaene
- Department of Chemistry, Ghent University, Gent B-9000, Belgium
| | - Rohan Pokratath
- Department of Chemistry, University of Basel, Basel CH-4058, Switzerland
| | | | - Kirsten M Ø Jensen
- Department of Chemistry, University of Copenhagen, 2100 Copenhagen Ø, Denmark
| | - Philippe F Smet
- Department of Solid State Sciences, Ghent University, Gent B-9000, Belgium
| | | | - Jonathan De Roo
- Department of Chemistry, University of Basel, Basel CH-4058, Switzerland
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9
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Gahlot S, Purohit B, Jeanneau E, Mishra S. Coinage Metal Complexes with Di‐tertiary‐butyl Sulfide as Precursors with Ultra‐Low Decomposition Temperature. Chemistry 2021; 27:10826-10832. [DOI: 10.1002/chem.202101471] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Sweta Gahlot
- Université Lyon 1 CNRS UMR 5256 IRCELYON Institut de recherches sur la catalyse et l'environnement de Lyon 2 avenue Albert Einstein 69626 Villeurbanne France
| | - Bhagyesh Purohit
- Université Lyon 1 CNRS UMR 5256 IRCELYON Institut de recherches sur la catalyse et l'environnement de Lyon 2 avenue Albert Einstein 69626 Villeurbanne France
| | - Erwann Jeanneau
- Université Lyon 1 Centre de Diffractométrie Henri Longchambon 5 rue de La Doua 69100 Villeurbanne France
| | - Shashank Mishra
- Université Lyon 1 CNRS UMR 5256 IRCELYON Institut de recherches sur la catalyse et l'environnement de Lyon 2 avenue Albert Einstein 69626 Villeurbanne France
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10
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Wang F, Javaid S, Chen W, Wang A, Buntine MA, Jia G. Synthesis of Atomically Thin CdTe Nanoplatelets by Using Polytelluride Tellurium Precursors. Aust J Chem 2021. [DOI: 10.1071/ch20174] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Colloidal two-dimensional (2D) semiconductor nanocrystals are of great importance due to their remarkable optical and electronic properties. Herein, shape-controllable synthesis of 2D wurtzite CdTe nanoplatelets (NPLs) by simply tailoring the reactivity of a tellurium (Te) precursor is reported. Ribbon-, shield-, and bullet-like 2D CdTe NPLs were prepared by a stepwise conversion from CdTe magic-size nanoclusters (MSNCs) by using Te32–, Te22–, and Te2– polytellurides as the tellurium precursor, respectively. This work not only develops a synthetic strategy capable of synthesising wurtzite CdTe nanoplatelets with controlled shapes by tailoring the reactivity of tellurium precursors but also gives insights into the growth mechanisms of colloidal 2D semiconductor nanocrystals.
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11
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Robinson EH, Dwyer KM, Koziel AC, Nuriye AY, Macdonald JE. Synthesis of vulcanite (CuTe) and metastable Cu 1.5Te nanocrystals using a dialkyl ditelluride precursor. NANOSCALE 2020; 12:23036-23041. [PMID: 33174553 DOI: 10.1039/d0nr06910h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This study demonstrates that a dialkyl ditelluride reagent can produce metastable and difficult-to-achieve metal telluride phases in nanocrystal syntheses. Using didodecyl ditelluride and without the need for phosphine precursors, nanocubes of the pseudo-cubic phase (Cu1.5Te) were synthesized at the moderate temperature of 135 °C. At the higher temperature of 155 °C, 2-D nanosheets of vulcanite (CuTe) resulted, a nanomaterial in a phase that has not been previously achieved through thermal decomposition methods. Materials were characterized with TEM, powder XRD and UV-Vis-NIR absorbance spectroscopy.
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Affiliation(s)
- Evan H Robinson
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA.
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12
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Bhardwaj K, Pradhan S, Basel S, Clarke M, Brito B, Thapa S, Roy P, Borthakur S, Saikia L, Shankar A, Stasiuk GJ, Pariyar A, Tamang S. Tunable NIR-II emitting silver chalcogenide quantum dots using thio/selenourea precursors: preparation of an MRI/NIR-II multimodal imaging agent. Dalton Trans 2020; 49:15425-15432. [PMID: 33140785 DOI: 10.1039/d0dt02974b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Aqueous-stable, Cd- and Pb-free colloidal quantum dots with fluorescence properties in the second near-infrared region (NIR-II, 1000-1400) are highly desirable for non-invasive deep-tissue optical imaging and biosensing. The low band-gap semiconductor, silver chalcogenide, offers a non-toxic and stable alternative to existing Pd, As, Hg and Cd-based NIR-II colloidal quantum dots (QDs). We report facile access to NIR-II emission windows with Ag2X (X = S, Se) QDs using easy-to-prepare thio/selenourea precursors and their analogues. The aqueous phase transfer of these QDs with a high conservation of fluorescence quantum yield (retention up to ∼90%) and colloidal stability is demonstrated. A bimodal NIR-II/MRI contrast agent with a tunable fluorescence and high T1 relaxivity of 408 mM-1 s-1 per QD (size ∼ 2.2 nm) and 990 mM-1 s-1 per QD (size ∼ 4.2 nm) has been prepared by grafting 50 and 120 monoaqua Gd(iii) complexes respectively to two differently sized Ag2S QDs. The size of the nanocrystals is crucial for tuning the Gd payload and the relaxivity.
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Affiliation(s)
- Karishma Bhardwaj
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
| | - Sajan Pradhan
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
| | - Siddhant Basel
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
| | - Mitchell Clarke
- Department of Biomedical Sciences, University of Hull, Hull, HU6 7RX, UK
| | - Beatriz Brito
- Department of Biomedical Sciences, University of Hull, Hull, HU6 7RX, UK and Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging, King's College London, St Thomas' Hospital, London, SE1 7EH, UK.
| | - Surakcha Thapa
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
| | - Pankaj Roy
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
| | - Sukanya Borthakur
- Department of Material Science, North East Institute of Science and Technology (NEIST), Assam 785006, India
| | - Lakshi Saikia
- Department of Material Science, North East Institute of Science and Technology (NEIST), Assam 785006, India
| | - Amit Shankar
- Department of Physics, Kurseong College, West Bengal 734203, India
| | - Graeme J Stasiuk
- Department of Biomedical Sciences, University of Hull, Hull, HU6 7RX, UK and Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging, King's College London, St Thomas' Hospital, London, SE1 7EH, UK.
| | - Anand Pariyar
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
| | - Sudarsan Tamang
- Department of Chemistry, School of Physical Sciences, Sikkim University, Sikkim 737102, India.
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13
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Abstract
Surfaces-and interfaces-are ubiquitous at the nanoscale. Their relevance to nanoscience and nanotechnology is therefore inherent. Colloidal inorganic nanocrystals (NCs), which can show more than a half of their atoms at the surface, are paradigmatic of the role of surfaces in determining materials' form and functions. Therefore, colloidal NCs may be regarded as soluble surfaces, allowing convenient study of ensemble structure and properties in the solution phase.Colloidal NCs commonly bear chemical species at their surface. Such species (generally referred to as ligands) are introduced already in the synthetic procedures and are added postsynthesis in surface chemistry modification (ligand exchange) reactions. Ligands (i) affect the reactivity and diffusion of the synthetic precursors, (ii) mediate NC interactions with the surroundings, and (iii) contribute to the overall electronic structure. In principle, a vast amount of ligands, as large as our imagination, could be used to coordinate the surface of colloidal NCs. In practice and despite the plethora of studies on NC surface chemistry, a relatively limited number of ligands have been explored. In addition, the importance of designing a set of ligands with tailored features (a ligand library), which may permit comprehensive discussion and explanation of the role of surfaces in the NC structure and properties, is often overlooked. Ligand libraries may also foster heuristic access to novel, unexpected observations.Here, the rational design of ligand libraries is discussed, suggesting that it may be a general method to advance knowledge on colloidal NCs and nanomaterials at large.First, a general ligand framework is introduced. The main subunits are identified: ligands are constituted by a binding group and a pendant moiety, bearing functional substituent groups. On this basis, ligand binding at the NC surface is discussed borrowing concepts from coordination chemistry. Dynamic equilibria at the NC surface are highlighted, revealing the compromise between forming and breaking bonds at interfaces and its intricate interplay with the surroundings. Tailoring of the ligand subunits may impart functions to the whole ligand, eventually transposable to the ligated NC.On these bases, it is shown how ligand design may be exploited to (i) exert control on the size and shape of the NCs, (ii) determine NCs' dispersibility in a solvent and affect their self-assembly, and (iii) tune the NCs' optical and electronic properties. These observations point to a description of colloidal NCs as un-decomposable species: ligands may be conceived as an integral part of the overall chemical and electronic structure of the colloidal NC and should not be considered as mere appendages that weakly perturb the inorganic core features.Finally, a perspective on the ligand library design is given. Function-oriented design of the ligand subunits is foreseen as an effective strategy to explore the chemical diversity space. High-throughput screening processes by using computation may represent a valuable tool for such an exploration. The whole ligand features, which depend on the subunits, can be implemented in the final NCs, providing feedback for refined design, toward a priori materials design. Ligand libraries can be fundamental to enabling colloidal NCs as reliable luminophores and (photo)catalysts.
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Affiliation(s)
- Carlo Giansante
- CNR NANOTEC, Istituto di Nanotecnologia, Via Monteroni, 73100 Lecce, Italy
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14
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Gahlot S, Jeanneau E, Singh D, Panda PK, Mishra YK, Ahuja R, Ledoux G, Mishra S. Molecules versus Nanoparticles: Identifying a Reactive Molecular Intermediate in the Synthesis of Ternary Coinage Metal Chalcogenides. Inorg Chem 2020; 59:7727-7738. [DOI: 10.1021/acs.inorgchem.0c00758] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sweta Gahlot
- Institut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), Université Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5256, 2 avenue Albert Einstein, 69626 Villeurbanne, France
| | - Erwann Jeanneau
- Centre de Diffractométrie Henri Longchambon, Université Lyon, Université Claude Bernard Lyon 1, 5 rue de La Doua, 69100 Villeurbanne, France
| | - Deobrat Singh
- Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
| | - Pritam Kumar Panda
- Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
| | | | - Rajeev Ahuja
- Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
| | - Gilles Ledoux
- Institut Lumière Matière, Université Lyon, Université Claude Bernard Lyon 1, CNRS, 69626 Villeurbanne, France
| | - Shashank Mishra
- Institut de Recherches sur la Catalyse et l’Environnement de Lyon (IRCELYON), Université Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5256, 2 avenue Albert Einstein, 69626 Villeurbanne, France
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15
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Newton KA, Ju Z, Tabatabaei K, Kauzlarich SM. Diorganyl Dichalcogenides as Surface Capping Ligands for Germanium Nanocrystals. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00749] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kathryn A. Newton
- Department of Chemistry, One Shields Avenue, University of California, Davis, California 95616, United States
| | - Zheng Ju
- Department of Chemistry, One Shields Avenue, University of California, Davis, California 95616, United States
| | - Katayoon Tabatabaei
- Department of Chemistry, One Shields Avenue, University of California, Davis, California 95616, United States
| | - Susan M. Kauzlarich
- Department of Chemistry, One Shields Avenue, University of California, Davis, California 95616, United States
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16
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Lee JM, Kraynak LA, Prieto AL. A Directed Route to Colloidal Nanoparticle Synthesis of the Copper Selenophosphate Cu
3
PSe
4. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jennifer M. Lee
- Department of Chemistry Colorado State University Fort Collins CO 80523 USA
| | - Leslie A. Kraynak
- Department of Chemistry Colorado State University Fort Collins CO 80523 USA
| | - Amy L. Prieto
- Department of Chemistry Colorado State University Fort Collins CO 80523 USA
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17
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Lee JM, Kraynak LA, Prieto AL. A Directed Route to Colloidal Nanoparticle Synthesis of the Copper Selenophosphate Cu 3 PSe 4. Angew Chem Int Ed Engl 2020; 59:3038-3042. [PMID: 31828911 DOI: 10.1002/anie.201911385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Indexed: 11/08/2022]
Abstract
The first colloidal nanoparticle synthesis of the copper selenophosphate Cu3 PSe4 , a promising new material for photovoltaics, is reported. Because the formation of binary copper selenide impurities seemed to form more readily, two approaches were developed to install phosphorus bonds directly: 1) the synthesis of molecular P4 Se3 and subsequent reaction with a copper precursor, (P-Se)+Cu, and 2) the synthesis of copper phosphide, Cu3 P, nanoparticles and subsequent reaction with a selenium precursor, (Cu-P)+Se. The isolation and purification of Cu3 P nanoparticles and subsequent selenization yielded phase-pure Cu3 PSe4 . Solvent effects and Se precursor reactivities were elucidated and were key to understanding the final reaction conditions.
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Affiliation(s)
- Jennifer M Lee
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
| | - Leslie A Kraynak
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
| | - Amy L Prieto
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
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18
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Prodanov M, Diakov M, Vashchenko V. A facile non-injection phosphorus-free synthesis of semiconductor nanoparticles using new selenium precursors. CrystEngComm 2020. [DOI: 10.1039/c9ce01467e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New Se-precursors enable the phosphorus-free non-injection synthesis of luminescent quantum dots and nanotetrapods as well as the injection-based synthesis of quantum rods.
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Affiliation(s)
- Maksym Prodanov
- State Key Laboratory of Advanced Displays and Optoelectronics Technologies
- Department of Electronics & Computer Engineering
- The Hong Kong University of Science and Technology
- Kowloon
- Hong Kong
| | - Maksym Diakov
- Department of Technology of Organic Materials
- State Scientific Institution ‘Institute for Single Crystals’
- NAS of Ukraine
- 61001 Kharkiv
- Ukraine
| | - Valerii Vashchenko
- State Key Laboratory of Advanced Displays and Optoelectronics Technologies
- Department of Electronics & Computer Engineering
- The Hong Kong University of Science and Technology
- Kowloon
- Hong Kong
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19
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Controlled synthesis of SnSxSe2−x nanoplate alloys via synergetic control of reactant activity and surface defect passivation control with surfactant and co-surfactant mixture. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.07.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Hanrahan MP, Chen Y, Blome-Fernández R, Stein JL, Pach GF, Adamson MAS, Neale NR, Cossairt BM, Vela J, Rossini AJ. Probing the Surface Structure of Semiconductor Nanoparticles by DNP SENS with Dielectric Support Materials. J Am Chem Soc 2019; 141:15532-15546. [PMID: 31456398 DOI: 10.1021/jacs.9b05509] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Surface characterization is crucial for understanding how the atomic-level structure affects the chemical and photophysical properties of semiconducting nanoparticles (NPs). Solid-state nuclear magnetic resonance spectroscopy (NMR) is potentially a powerful technique for the characterization of the surface of NPs, but it is hindered by poor sensitivity. Dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS) has previously been demonstrated to enhance the sensitivity of surface-selective solid-state NMR experiments by 1-2 orders of magnitude. Established sample preparations for DNP SENS experiments on NPs require the dilution of the NPs on mesoporous silica. Using hexagonal boron nitride (h-BN) to disperse the NPs doubles DNP enhancements and absolute sensitivity in comparison to standard protocols with mesoporous silica. Alternatively, precipitating the NPs as powders, mixing them with h-BN, and then impregnating the powdered mixture with radical solution leads to further 4-fold sensitivity enhancements by increasing the concentration of NPs in the final sample. This modified procedure provides a factor of 9 improvement in NMR sensitivity in comparison to previously established DNP SENS procedures, enabling challenging homonuclear and heteronuclear 2D NMR experiments on CdS, Si, and Cd3P2 NPs. These experiments allow NMR signals from the surface, subsurface, and core sites to be observed and assigned. For example, we demonstrate the acquisition of DNP-enhanced 2D 113Cd-113Cd correlation NMR experiments on CdS NPs and natural isotropic abundance 2D 13C-29Si HETCOR of functionalized Si NPs. These experiments provide a critical understanding of NP surface structures.
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Affiliation(s)
- Michael P Hanrahan
- Iowa State University , Department of Chemistry , Ames , Iowa 50011 , United States.,US DOE Ames Laboratory , Ames , Iowa 50011 , United States
| | - Yunhua Chen
- Iowa State University , Department of Chemistry , Ames , Iowa 50011 , United States.,US DOE Ames Laboratory , Ames , Iowa 50011 , United States
| | | | - Jennifer L Stein
- University of Washington , Department of Chemistry , Seattle , Washington 98195 , United States
| | - Gregory F Pach
- Chemistry and Nanoscience Center , National Renewable Energy Laboratory , 15013 Denver West Parkway , Golden , Colorado 80401 , United States
| | - Marquix A S Adamson
- Iowa State University , Department of Chemistry , Ames , Iowa 50011 , United States
| | - Nathan R Neale
- Chemistry and Nanoscience Center , National Renewable Energy Laboratory , 15013 Denver West Parkway , Golden , Colorado 80401 , United States
| | - Brandi M Cossairt
- University of Washington , Department of Chemistry , Seattle , Washington 98195 , United States
| | - Javier Vela
- Iowa State University , Department of Chemistry , Ames , Iowa 50011 , United States.,US DOE Ames Laboratory , Ames , Iowa 50011 , United States
| | - Aaron J Rossini
- Iowa State University , Department of Chemistry , Ames , Iowa 50011 , United States.,US DOE Ames Laboratory , Ames , Iowa 50011 , United States
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21
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Hamachi LS, Yang H, Jen-La Plante I, Saenz N, Qian K, Campos MP, Cleveland GT, Rreza I, Oza A, Walravens W, Chan EM, Hens Z, Crowther AC, Owen JS. Precursor reaction kinetics control compositional grading and size of CdSe 1-x S x nanocrystal heterostructures. Chem Sci 2019; 10:6539-6552. [PMID: 31367306 PMCID: PMC6615248 DOI: 10.1039/c9sc00989b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/14/2019] [Indexed: 12/13/2022] Open
Abstract
We report a method to control the composition and microstructure of CdSe1-x S x nanocrystals by the simultaneous injection of sulfide and selenide precursors into a solution of cadmium oleate and oleic acid at 240 °C. Pairs of substituted thio- and selenoureas were selected from a library of compounds with conversion reaction reactivity exponents (k E) spanning 1.3 × 10-5 s-1 to 2.0 × 10-1 s-1. Depending on the relative reactivity (k Se/k S), core/shell and alloyed architectures were obtained. Growth of a thick outer CdS shell using a syringe pump method provides gram quantities of brightly photoluminescent quantum dots (PLQY = 67 to 90%) in a single reaction vessel. Kinetics simulations predict that relative precursor reactivity ratios of less than 10 result in alloyed compositions, while larger reactivity differences lead to abrupt interfaces. CdSe1-x S x alloys (k Se/k S = 2.4) display two longitudinal optical phonon modes with composition dependent frequencies characteristic of the alloy microstructure. When one precursor is more reactive than the other, its conversion reactivity and mole fraction control the number of nuclei, the final nanocrystal size at full conversion, and the elemental composition. The utility of controlled reactivity for adjusting alloy microstructure is discussed.
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Affiliation(s)
- Leslie S Hamachi
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Haoran Yang
- The Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA
| | - Ilan Jen-La Plante
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Natalie Saenz
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Kevin Qian
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Michael P Campos
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Gregory T Cleveland
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Iva Rreza
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Aisha Oza
- Department of Chemistry , Barnard College , New York , New York 10027 , USA .
| | - Willem Walravens
- Physics and Chemistry of Nanostructures Group (PCN) , Ghent University , B-9000 Ghent , Belgium
| | - Emory M Chan
- The Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA
| | - Zeger Hens
- Physics and Chemistry of Nanostructures Group (PCN) , Ghent University , B-9000 Ghent , Belgium
- Center of Nano and Biophotonics , Ghent University , B-9000 Ghent , Belgium
| | - Andrew C Crowther
- Department of Chemistry , Barnard College , New York , New York 10027 , USA .
| | - Jonathan S Owen
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
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22
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Lee JM, Miller RC, Moloney LJ, Prieto AL. The development of strategies for nanoparticle synthesis: Considerations for deepening understanding of inherently complex systems. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.12.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Daniels C, Mendivelso-Perez DL, Rosales BA, You D, Sahu S, Jones JS, Smith EA, Gabbaï F, Vela J. Heterobimetallic Single-Source Precursors: A Springboard to the Synthesis of Binary Intermetallics. ACS OMEGA 2019; 4:5197-5203. [PMID: 31459692 PMCID: PMC6648806 DOI: 10.1021/acsomega.9b00088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/25/2019] [Indexed: 05/04/2023]
Abstract
Intermetallics are atomically ordered crystalline compounds containing two or more main group and transition metals. In addition to their rich crystal chemistry, intermetallics display unique properties of interest for a variety of applications, including superconductivity, hydrogen storage, and catalysis. Because of the presence of metals with a wide range of reduction potentials, the controlled synthesis of intermetallics can be difficult. Recently, soft chemical syntheses such as the modified polyol and ship-in-a-bottle methods have helped advance the preparation of these materials. However, phase-segregated products and complex multistep syntheses remain common. Here, we demonstrate the use of heterobimetallic single-source precursors for the synthesis of 10-15 and 11-15 binary intermetallics. The coordination environment of the precursor, as well as the exact temperature used play a critical role in determining the crystalline intermetallic phase that is produced, highlighting the potential versatility of this approach in the synthesis of a variety of compounds. Furthermore, we show that a recently developed novel plasma-processing technique is successful in removing the surface graphitic carbon observed in some of the prepared compounds. This new single-source precursor approach is a powerful addition to the synthesis of atomically ordered intermetallic compounds and will help facilitate their further study and development for future applications.
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Affiliation(s)
- Carena
L. Daniels
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Deyny L. Mendivelso-Perez
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames
Laboratory, Ames, Iowa 50011, United
States
| | - Bryan A. Rosales
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Di You
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Sumit Sahu
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - J. Stuart Jones
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Emily A. Smith
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames
Laboratory, Ames, Iowa 50011, United
States
| | - François
P. Gabbaï
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Javier Vela
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames
Laboratory, Ames, Iowa 50011, United
States
- E-mail:
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24
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Scott JA, Angeloski A, Aharonovich I, Lobo CJ, McDonagh A, Toth M. In situ study of the precursor conversion reactions during solventless synthesis of Co 9S 8, Ni 3S 2, Co and Ni nanowires. NANOSCALE 2018; 10:15669-15676. [PMID: 30091764 DOI: 10.1039/c8nr02093k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Synthesis of Co9S8, Ni3S2, Co and Ni nanowires by solventless thermolysis of a mixture of metal(ii) acetate and cysteine in vacuum is reported. The simple precursor system enables the nanowire phase to be tuned from pure metal (Co or Ni) to metal sulfide (Co9S8, Ni3S2) by varying the relative concentration of the metal(ii) acetate. The growth environment facilitates new insights through in situ characterization using field-emission scanning electron microscopy (FESEM) and thermogravimetric analysis with gas chromatography-mass spectrometry (TGA-GC-MS). Direct observation by FESEM shows the temperature at which nanowire growth occurs and suggests adatoms are incorporated into the base of the growing nanowire. TGA-GC-MS reveals the rates of precursor decomposition and identity of the volatilized ligand fragments during heat-up and at the nanowire growth temperature. Our results constitute a new approach for the selective fabrication of high quality Co9S8 and Ni3S2 nanowires and more importantly provides new understanding of precursor decomposition reactions that support symmetry-breaking growth in nanocrystals by heat-up synthesis.
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Affiliation(s)
- John A Scott
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo 2007, Australia.
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25
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Kshirsagar AS, Khanna PK. Reaction Tailoring for Synthesis of Phase-Pure Nanocrystals of AgInSe2
, Cu3
SbSe3
and CuSbSe2. ChemistrySelect 2018. [DOI: 10.1002/slct.201702986] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anuraj S. Kshirsagar
- Department of Applied Chemistry; Defence Institute of Advanced Technology (DIAT); Girinagar Pune-411025, Maharashtra India
| | - Pawan. K. Khanna
- Department of Applied Chemistry; Defence Institute of Advanced Technology (DIAT); Girinagar Pune-411025, Maharashtra India
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26
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Wurmbrand D, Fischer JWA, Rosenberg R, Boldt K. Morphogenesis of anisotropic nanoparticles: self-templating via non-classical, fibrillar Cd2Se intermediates. Chem Commun (Camb) 2018; 54:7358-7361. [DOI: 10.1039/c8cc02058b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Semiconductor nanorods nucleate via a fibrillar intermediate that is able to template its own preferential growth direction.
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Affiliation(s)
- Daniel Wurmbrand
- University of Konstanz
- Department of Chemistry
- 78457 Konstanz
- Germany
| | | | - Rose Rosenberg
- University of Konstanz
- Department of Chemistry
- 78457 Konstanz
- Germany
| | - Klaus Boldt
- University of Konstanz
- Department of Chemistry
- 78457 Konstanz
- Germany
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27
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Fortney-Zirker RG, Henderson W, Tiekink ER. Mixed-chalcogenide diplatinum complexes; an investigation of ligand exchange processes using ESI mass spectrometry. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Rusek M, Bendt G, Wölper C, Bläser D, Schulz S. Intramolecularly-stabilized Group 14 Alkoxides - Promising Precursors for the Synthesis of Group 14-Chalcogenides by Hot-Injection Method. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Monika Rusek
- Faculty of Chemistry, Inorganic Chemistry, and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 7 45114 Essen Germany
| | - Georg Bendt
- Faculty of Chemistry, Inorganic Chemistry, and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 7 45114 Essen Germany
| | - Christoph Wölper
- Faculty of Chemistry, Inorganic Chemistry, and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 7 45114 Essen Germany
| | - Dieter Bläser
- Faculty of Chemistry, Inorganic Chemistry, and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 7 45114 Essen Germany
| | - Stephan Schulz
- Faculty of Chemistry, Inorganic Chemistry, and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 7 45114 Essen Germany
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29
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Reiss P, Carrière M, Lincheneau C, Vaure L, Tamang S. Synthesis of Semiconductor Nanocrystals, Focusing on Nontoxic and Earth-Abundant Materials. Chem Rev 2016; 116:10731-819. [DOI: 10.1021/acs.chemrev.6b00116] [Citation(s) in RCA: 382] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Peter Reiss
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-STEP/LEMOH, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
- CNRS, SPrAM, F-38054 Grenoble Cedex 9, France
| | - Marie Carrière
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-CIBEST/LAN, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
| | - Christophe Lincheneau
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-STEP/LEMOH, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
- CNRS, SPrAM, F-38054 Grenoble Cedex 9, France
| | - Louis Vaure
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-STEP/LEMOH, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
- CNRS, SPrAM, F-38054 Grenoble Cedex 9, France
| | - Sudarsan Tamang
- Department
of Chemistry, Sikkim University, Sikkim 737102, India
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30
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Faller JW, Parr J. A convenient synthesis of cadmium chalcogenide quantum dots from cadmium acetate and bis(diphenylphosphino)methane monosulfide and –selenide or 1,4-bis(diphenylphosphino)butane monoselenide. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1100188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- J. W. Faller
- Department of Chemistry, Yale University, New Haven, CT, 06520-8107, USA
| | - Jonathan Parr
- Department of Chemistry, Yale University, New Haven, CT, 06520-8107, USA
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31
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Kshirsagar AS, More PV, Khanna PK. Synthesis of shape and size controlled copper indium diselenide (CuInSe2) via extrusion of selenium from 1,2,3-selenadiazole. RSC Adv 2016. [DOI: 10.1039/c6ra16933c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CISe NPs were successfully synthesized via extrusion of selenium from 1,2,3-selenadiazole. The effect of various reaction parameters on the size and shape of CISe were studied.
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Affiliation(s)
- Anuraj S. Kshirsagar
- Nano Chemistry and Quantum Dots R & D Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| | - Priyesh V. More
- Nano Chemistry and Quantum Dots R & D Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
| | - Pawan K. Khanna
- Nano Chemistry and Quantum Dots R & D Lab
- Department of Applied Chemistry
- Defence Institute of Advanced Technology (DIAT)
- Ministry of Defence
- Govt. of India
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32
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Matxain JM, Asua JM, Ruipérez F. Design of new disulfide-based organic compounds for the improvement of self-healing materials. Phys Chem Chem Phys 2015; 18:1758-70. [PMID: 26675660 DOI: 10.1039/c5cp06660c] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Self-healing materials are a very promising kind of materials due to their capacity to repair themselves. Among others, diphenyl disulfide-based compounds (Ph2S2) appear to be among the best candidates to develop materials with optimum self-healing properties. However, few is known regarding both the reaction mechanism and the electronic structure that make possible such properties. In this vein, theoretical approaches are of great interest. In this work, we have carried out theoretical calculations on a wide set of different disulfide compounds, both aromatic and aliphatic, in order to elucidate the prevalent reaction mechanism and the necessary electronic conditions needed for improved self-healing properties. Two competitive mechanisms were considered, namely, the metathesis and the radical-mediated mechanism. According to our calculations, the radical-mediated mechanism is the responsible for this process. The formation of sulfenyl radicals strongly depends on the S-S bond strength, which can be modulated chemically by the use of proper derivatives. At this point, amino derivatives appear to be the most promising ones. In addition to the S-S bond strength, hydrogen bonding between disulfide chains seems to be relevant to favour the contact among disulfide units. This is crucial for the reaction to take place. The calculated hydrogen bonding energies are of the same order of magnitude as the S-S bond energies. Finally, reaction barriers have been analysed for some promising candidates. Two reaction mechanisms were compared, namely, the [2+2] metathesis reaction mechanism and the [2+1] radical-mediated mechanism. No computational evidence for the existence of any transition state for the metathesis mechanism was found, which indicates that the radical-mediated mechanism is the one responsible in the self-healing process of these materials. Interestingly, the calculated reaction barriers are around 10 kcal mol(-1) regardless the substituent employed. All these results suggest that the radical formation and the structural role of the hydrogen bonding prevale over kinetics. Having this in mind, as a conclusion, some new compounds are proposed for the design of future self-healing materials with improved features.
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Affiliation(s)
- Jon M Matxain
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU and Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain
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Brutchey RL. Diorganyl dichalcogenides as useful synthons for colloidal semiconductor nanocrystals. Acc Chem Res 2015; 48:2918-26. [PMID: 26545235 DOI: 10.1021/acs.accounts.5b00362] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The ability to synthesize colloidal semiconductor nanocrystals in a well-controlled manner (i.e., with fine control over size, shape, size dispersion, and composition) has been mastered over the past 15 years. Much of this success stems from careful studies of precursor conversion and nanocrystal growth with respect to phosphine chalcogenide precursors for the synthesis of metal chalcogenide nanocrystals. Despite the high level of success that has been achieved with phosphine chalcogenides, there has been a longstanding interest in exploring alternate chalcogenide precursors because of issues associated with phosphine chalcogenide cost, purity, toxicity, etc. This has resulted in a large body of literature on the use of sulfur and selenium dissolved in octadecene or amines, thio- and selenoureas, and silyl chalcogenides as alternate chalcogenide precursors for metal chalcogenide nanocrystal synthesis. In this Account, emerging work on the use of diorganyl dichalcogenides (R-E-E-R, where E = S, Se, or Te and R = alkyl, allyl, benzyl, or aryl) as alternate chalcogenide precursors for the synthesis of metal chalcogenide nanocrystals is summarized. Among the benefits of these dichalcogenide synthons are the following: (i) they represent the first and only common precursor type that can function as chalcogen transfer reagents for each of the group VI elements (i.e., to make metal oxide, metal sulfide, metal selenide, and metal telluride nanocrystals); (ii) they possess relatively weak E-E bonds that can be readily cleaved under mild thermolytic or photolytic conditions; and (iii) the organic substituents can be tuned to affect the reactivity. These combined attributes have allowed dichalcogenide precursors to be employed for a wide range of metal chalcogenide nanocrystal syntheses, including those for In2S3, SnxGe1-xSe, SnTe, Cu2-xSySe1-y, ZnSe, CdS, CdSe, MoSe2, WSe2, BiSe, and CuFeS2. Interestingly, a number of metastable phases of compositionally complex semiconductors can be kinetically accessed through syntheses utilizing dichalcogenide precursors, likely as a result of their ability to convert at relatively low temperatures. These include the hexagonal wurtzite phases of CuInS2, CuInSe2, Cu2ZnSn(S1-xSex)4, and Cu2SnSe3 nanocrystals. The discovery of crystal phases on the nanoscale that do not exist in their bulk analogues is a developing area of nanocrystal chemistry, and dichalcogenides are proving to be a useful synthetic tool in this regard. The most recent application of dichalcogenide synthons for semiconductor nanocrystals is their use as precursors for surface ligands. While there is a rich history of using thiol ligands for semiconductor nanocrystals, the analogous selenol and tellurol ligands have not been studied, likely because of their oxidative instability. Dichalcogenides have proven useful in this regard, as they can be reduced in situ with diphenylphosphine to give the corresponding selenol or tellurol ligand that binds to the nanocrystal surface. This chemistry has been applied to the in situ synthesis and ligand binding of selenols to PbSe nanocrystals and both selenols and tellurols to CdSe nanocrystals. These initial studies have allowed the photophysics of these nanocrystal-ligand constructs to be investigated; in both cases, it appears that the selenol and tellurol ligands act as hole traps that quench the photoluminescence of the semiconductor nanocrystals.
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Affiliation(s)
- Richard L. Brutchey
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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Alvarado SR, Shortt IA, Fan HJ, Vela J. Assessing Phosphine–Chalcogen Bond Energetics from Calculations. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00428] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Samuel R. Alvarado
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, Ames, Iowa 50011, United States
| | - Ian A. Shortt
- Department of Chemistry, Prairie View A&M University, Prairie View, Texas 77446, United States
| | - Hua-Jun Fan
- Department of Chemistry, Prairie View A&M University, Prairie View, Texas 77446, United States
| | - Javier Vela
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- Ames Laboratory, Ames, Iowa 50011, United States
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35
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Hendricks MP, Campos MP, Cleveland GT, Jen-La Plante I, Owen JS. A tunable library of substituted thiourea precursors to metal sulfide nanocrystals. Science 2015; 348:1226-30. [DOI: 10.1126/science.aaa2951] [Citation(s) in RCA: 271] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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36
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Abstract
A new local film heating system (LFHS) can precisely control the local mold wall temperature in the nanoinjection molding process.
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Affiliation(s)
- Hwa Jin Oh
- Research Institute of Advanced Materials (RIAM)
- Department of Materials Science and Engineering
- Seoul National University
- Seoul
- Korea
| | - Young Seok Song
- Polymer System Division
- Fiber System Engineering
- Dankook University
- Suji-Gu
- Korea
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37
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Ortiz N, Weiner RG, Skrabalak SE. Ligand-controlled Co-reduction versus electroless Co-deposition: synthesis of nanodendrites with spatially defined bimetallic distributions. ACS NANO 2014; 8:12461-12467. [PMID: 25490676 DOI: 10.1021/nn5052822] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The predictable synthesis of bimetallic nanostructures via co-reduction of two metal precursors is challenging due to our limited understanding of precursor ligand effects. Here, the influence of different metal-ligand environments is systematically examined in the synthesis of Pd-Pt nanostructures as a model bimetallic system. Nanodendrites with different spatially defined Pd-Pt compositions are achieved, where the local ligand environments of metal precursors dictate if temporally separated co-reduction dominates to achieve core-shell nanostructures or whether electroless co-deposition proceeds to facilitate alloyed nanostructure formation. As the properties of bimetallic nanomaterials depend on crystal ordering and composition, chemical routes to structurally defined bimetallic nanomaterials are critically needed. The approaches reported here should be applicable to other bimetallic compositions given the established reactivity of coordination complexes available for use as precursors.
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Affiliation(s)
- Nancy Ortiz
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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García-Rodríguez R, Liu H. A nuclear magnetic resonance study of the binding of trimethylphosphine selenide to cadmium oleate. J Phys Chem A 2014; 118:7314-9. [PMID: 24410663 DOI: 10.1021/jp411681f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We report an NMR study on the binding of trimethylphosphine selenide (Se═PMe3) to cadmium oleate (Cd(OA)2) in CDCl3 and toluene-d8. At room temperature in CDCl3, Se═PMe3 binds to Cd(OA) 2 in 1:1 ratio with a binding constant of 20 ± 3 as determined by NMR titration. The Cd-bound and free Se═PMe3 are in fast exchange on the NMR time scale at room temperature and gives only one (31)P NMR peak. At ca. 190 K, three (31)P NMR peaks were observed for a toluene-d8 solution of 1:1 mixture of Cd(OA)2 and Se═PMe3. These three peaks were tentatively assigned to free Se═PMe3 (9.0 ppm), 1:1 (19.5 ppm), and 2:1 complex between Se═PMe3 and Cd(OA)2 (18.8 ppm).
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Affiliation(s)
- Raúl García-Rodríguez
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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Yan K, Zhang L, Kuang Q, Wei Z, Yi Y, Wang J, Yang S. Solution-processed, barrier-confined, and 1D nanostructure supported quasi-quantum well with large photoluminescence enhancement. ACS NANO 2014; 8:3771-3780. [PMID: 24580094 DOI: 10.1021/nn500465w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Planar substrate supported semiconductor quantum well (QW) structures are not amenable to manipulation in miniature devices, while free-standing QW nanostructures, e.g., ultrathin nanosheets and nanoribbons, suffer from mechanical and environmental instability. Therefore, it is tempting to fashion high-quality QW structures on anisotropic and mechanically robust supporting nanostructures such as nanowires and nanoplates. Herein, we report a solution quasi-heteroepitaxial route for growing a barrier-confined quasi-QW structure (ZnSe/CdSe/ZnSe) on the supporting arms of ZnO nanotetrapods, which have a 1D nanowire structure, through the combination of ion exchange and successive deposition assembly. This resulted in highly crystalline and highly oriented quasi-QWs along the whole axial direction of the arms of the nanotetrapod because a transition buffer layer (Zn(x)Cd(1-x)Se) was formed and in turn reduced the lattice mismatch and surface defects. Significantly, such a barrier-confined QW emits excitonic light ∼17 times stronger than the heterojunction (HJ)-type structure (ZnSe/CdSe, HJ) at the single-particle level. Time-resolved photoluminescence from ensemble QWs exhibits a lifetime of 10 ns, contrasting sharply with ∼300 ps for the control HJ sample. Single-particle PL and Raman spectra suggest that the barrier layer of QW has completely removed the surface trap states on the HJ and restored or upgraded the photoelectric properties of the semiconductor layer. Therefore, this deliberate heteroepitaxial growth protocol on the supporting nanotetrapod has realized a several micrometer long QW structure with high mechanical robustness and high photoelectric quality. We envision that such QWs integrated on 1D nanostructures will largely improve the performance of solar cells and bioprobes, among others.
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Affiliation(s)
- Keyou Yan
- Nano Science and Technology Program, Department of Chemistry, and ‡Department of Physics, William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
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40
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A quantitative study of chemical kinetics for the synthesis of doped oxide nanocrystals using FTIR. Sci Rep 2014; 4:4353. [PMID: 24619066 PMCID: PMC3950640 DOI: 10.1038/srep04353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 02/21/2014] [Indexed: 11/09/2022] Open
Abstract
The synthesis of Mg-doped ZnO nanocrystals was employed as a model system to quantitatively study the chemical kinetics of the precursor conversion reactions at synthetic conditions and the correlations with the formation of doped nanocrystals. An accurate method using Fourier transform infrared spectroscopy was developed to explore the alcoholysis reactions of the cationic precursors. Our study showed that three independent factors, molar ratio of dopant precursor, reaction temperature and coordination ligands of cationic precursors influenced the relative reactivity of magnesium to zinc precursor, and in turn the formation of Mg-doped ZnO nanocrystals with defined shapes and properties. This understanding underpins the advancement of the syntheses of doped nanocrystals and should be useful for future rational design of new synthetic systems.
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41
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Alvarado SR, Guo Y, Ruberu TPA, Tavasoli E, Vela J. Inorganic chemistry solutions to semiconductor nanocrystal problems. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.09.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Romashov LV, Ananikov VP. Self-assembled selenium monolayers: from nanotechnology to materials science and adaptive catalysis. Chemistry 2013; 19:17640-60. [PMID: 24288138 DOI: 10.1002/chem.201302115] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Self-assembled monolayers (SAMs) of selenium have emerged into a rapidly developing field of nanotechnology with several promising opportunities in materials chemistry and catalysis. Comparison between sulfur-based self-assembled monolayers and newly developed selenium-based monolayers reveal outstanding complimentary features on surface chemistry and highlighted the key role of the headgroup element. Diverse structural properties and reactivity of organosulfur and organoselenium groups on the surface provide flexible frameworks to create new generations of materials and adaptive catalysts with unprecedented selectivity. Important practical utility of adaptive catalytic systems deals with development of sustainable technologies and industrial processes based on natural resources. Independent development of nanotechnology, materials science and catalysis has led to the discovery of common fundamental principles of the surface chemistry of chalcogen compounds.
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Affiliation(s)
- Leonid V Romashov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991 (Russia)
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