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Jin YR, Liu Y, Jiang FL. Positive Sorption Behaviors in the Ligand Exchanges for Water-Soluble Quantum Dots and a Strategy for Specific Targeting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51746-51758. [PMID: 34672524 DOI: 10.1021/acsami.1c15022] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
N,N,N',N'-Tetramethylethylenediamine (TMEDA) and ethylenediamine (EDA) were investigated in-depth in the ligand exchanges for water-soluble CdSe quantum dots (QDs). TMEDA could assist the phase transfer of QDs from apolar solvents to the aqueous solutions as stabilized by mercaptopropionic acid (MPA). We successfully maintained the stability of a series of MPA-capped QDs of different ligand densities for NMR characterizations in aqueous solutions. The proton NMR spectroscopies of MPA of the binding state were used to analyze the ligand densities on the surface of QDs, which were not explored in the past. The binding thermodynamics of the surface ligands of QDs, as analyzed using the Hill equation, demonstrated a positive promoting effect and possible interactions between ligands. EDA in the purification process underwent a spontaneous adsorption with two-stage thermodynamic behaviors as characterized by isothermal titration calorimetry. Due to the positive role of the already adsorbed ligands, excess EDA would further attach to the surface of QDs in the form of non-bonded physisorption, greatly improving the quantum yield (QY) of QDs, and the ligand of this part would almost not change the stability of QDs. We proposed a strategy for the preparation of aqueous QDs with a high QY, followed by fluorescence quenching-enhancement cycles caused by purification-adsorption operations. The strategy made it possible for the preparation of functional QDs with small molecules after purification operations. Kinetics of the sorption of ligands on the surface of QDs were determined by fluorescence spectroscopy. Modified pseudo-second-order kinetics after consideration of the ligand-ligand interaction effect could well analyze the kinetic data. This kinetic model had advantages over the previous ligand exchange model in terms of accuracy, reproducibility, and physical significance. Finally, we used the above strategy for the design of fluorescent QDs for bioimaging of lysosomes, mitochondria, and cancer cells. This work can simplify the preparation of multifunctional fluorescent QDs and avoid complicated ligand design.
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Affiliation(s)
- Yi-Rou Jin
- Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Yi Liu
- Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
- College of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300387, P. R. China
| | - Feng-Lei Jiang
- Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
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2
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Luise D, Wilbraham L, Labat F, Ciofini I. Modeling UV-Vis spectra of low dimensional materials using electrostatic embedding: The case of CdSe. J Comput Chem 2021; 42:1212-1224. [PMID: 33978978 DOI: 10.1002/jcc.26534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 11/08/2022]
Abstract
We present a generalization of a self-consistent electrostatic embedding approach (SC-Ewald) devised to investigate the photophysical properties of 3D periodic materials, to systems in one- or two-dimensional (2D) reduced periodicity. In this approach, calculations are carried out on a small finite molecular cluster extracted from a periodic model, while the crystalline environment is accounted for by an array of point charges which are fitted to reproduce the exact electrostatic potential (at ground or the excited state) of the infinite periodic system. Periodic density functional theory (DFT) calculations are combined with time dependent DFT calculations to simulate absorption and emission properties of the extended system under investigation. We apply this method to compute the UV-Vis. spectra of bulk and quantum-confined 0D quantum dots and 2D extended nanoplatelets of CdSe, due to their relevance as sensitizers in solar cells technologies. The influence of the size and shape of the finite cluster model chosen in the excited state calculations was also investigated and revealed that, although the long-range electrostatics of the environment are important for the calculation of the UV-Vis, a subtle balance between short- and long-range effects exists. These encouraging results demonstrate that this self-consistent electrostatic embedding approach, when applied in different dimensions, can successfully model the photophysical properties of diverse material classes, making it an attractive low-cost alternative to far more computationally demanding electronic structure methods for excited state calculations.
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Affiliation(s)
- Davide Luise
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Chemical Theory and Modelling Group, Paris, France
| | | | - Frédéric Labat
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Chemical Theory and Modelling Group, Paris, France
| | - Ilaria Ciofini
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Chemical Theory and Modelling Group, Paris, France
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3
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Du N, Cui Y, Zhang L, Yang M. Effect of Mn doping on the electron injection in CdSe/TiO 2 quantum dot sensitized solar cells. Phys Chem Chem Phys 2021; 23:647-656. [PMID: 33332495 DOI: 10.1039/d0cp03866k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Promotion in power conversion efficiency is an appealing task for quantum dot-sensitized solar cells that have emerged as promising materials for the utilization of clean and sustainable energy. Doping of Mn atoms into quantum dots (QD) has been proven to be one of the effective approaches, although the origin of such a promotion remains controversial. While several procedures are involved in the power conversion process, electron injection from the QD to the semiconductor oxide substrate is focused on in this work using first-principles calculations. Based on the Marcus theory, the electron injection rates are evaluated for the quantum dot-sensitized solar cell models in which the pure and Mn-doped core-shell CdSe clusters are deposited on a semiconductor titanium dioxide substrate. Enhanced rates are obtained for the Mn-doped structure, which is in qualitative agreement with the experiments. A large number of dominant injection channels and strong QD-substrate coupling are responsible for the Mn-induced rate enhancement, which could be achieved by manipulating the band structure mapping between the QD and the semiconductor oxide. By addressing the role of an Mn dopant in the electron injection process, strategies for the promotion of electron injection rates are proposed for the design of quantum dot-sensitized solar cells.
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Affiliation(s)
- Ning Du
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.
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4
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Jäger M, Schäfer R, Johnston RL. GIGA: a versatile genetic algorithm for free and supported clusters and nanoparticles in the presence of ligands. NANOSCALE 2019; 11:9042-9052. [PMID: 31025685 DOI: 10.1039/c9nr02031d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present a versatile parallelised genetic algorithm, which is able to perform global optimisation from first principles for pure and mixed free clusters in the gas phase, supported on surfaces or in the presence of one or several atomic or molecular species (ligands or adsorbates). The genetic algorithm is coupled to different quantum chemical software packages in order to permit a large variety of methods for the global optimisation. The genetic algorithm is also capable of optimising different electronic spin multiplicities explicitly, which allows global optimisation on several potential energy hypersurfaces in parallel. We employ the genetic algorithm to study ligand-passivated clusters [Cd3Se3(H2S)3]+ and to investigate adsorption of [Pt6(H2O)2]+ supported on graphene. The explicit consideration of the electronic spin multiplicity during global optimisation is investigated for nanoalloy clusters Pt4V2.
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Affiliation(s)
- Marc Jäger
- Technische Universität Darmstadt, Eduard-Zintl Institut für Anorganische und Physikalische Chemie, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany.
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5
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Ghosh S, Asher JC, Gagliardi L, Cramer CJ, Govind N. A semiempirical effective Hamiltonian based approach for analyzing excited state wave functions and computing excited state absorption spectra using real-time dynamics. J Chem Phys 2019; 150:104103. [DOI: 10.1063/1.5061746] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Soumen Ghosh
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, USA
| | - Jason C. Asher
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, USA
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, USA
| | - Christopher J. Cramer
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, USA
| | - Niranjan Govind
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99338, USA
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6
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Jäger M, Shayeghi A, Klippenstein V, Johnston RL, Schäfer R. Chemical bonding in initial building blocks of semiconductors: Geometrical structures and optical absorption spectra of isolated CdSe2+ and Cd2Se2+ species. J Chem Phys 2018; 149:244308. [DOI: 10.1063/1.5066414] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- Marc Jäger
- Technische Universität Darmstadt, Eduard-Zintl-Institut, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Armin Shayeghi
- Technische Universität Darmstadt, Eduard-Zintl-Institut, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
- Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
| | - Viktor Klippenstein
- Technische Universität Darmstadt, Eduard-Zintl-Institut, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Roy L. Johnston
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Rolf Schäfer
- Technische Universität Darmstadt, Eduard-Zintl-Institut, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
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7
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Zhu Y, Herbert JM. Self-consistent predictor/corrector algorithms for stable and efficient integration of the time-dependent Kohn-Sham equation. J Chem Phys 2018; 148:044117. [PMID: 29390834 DOI: 10.1063/1.5004675] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ying Zhu
- Department of Chemistry and Biochemistry, and Chemical Physics Program, The Ohio State University, Columbus, Ohio 43210, USA
| | - John M. Herbert
- Department of Chemistry and Biochemistry, and Chemical Physics Program, The Ohio State University, Columbus, Ohio 43210, USA
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9
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Ding WL, Peng XL, Sun ZZ, Li ZS. The electron injection rate in CdSe quantum dot sensitized solar cells: from a bifunctional linker and zinc oxide morphology. NANOSCALE 2017; 9:16806-16816. [PMID: 29072766 DOI: 10.1039/c7nr04847e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Herein, we have investigated the effect of both the bifunctional linker (L1, L2, L3, and L4) and ZnO morphology (porous nanoparticles (NPs), nanowires (NWs), and nanotubes (NTs-A and NTs-Z)) on the electron injection in CdSe QD sensitized solar cells by first-principles simulation. Via calculating the partitioned interfaces formed by different components (linker/QDs and ZnO/linker), we found that the electronic states of QDs and every ZnO substrate are insensitive to any linker, while the frontier orbitals of L1-L4 (with increased delocalization) manifest a systematical negative-shift. Because of the lowest unoccupied molecular orbital (LUMO) of L1 compared to its counterparts aligned in the region of the virtual states of QDs or the substrate with a high density of states, it always yields a stronger electronic coupling with QDs and varied substrates. After characterization of the complete ZnO/linker/QD system, we found that the electron injection time (τ) vastly depends on both the linker and substrate. On the one hand, L1 bridged QDs and every substrate always achieve the shortest τ compared to their counterpart associated cases. On the other hand, NW supported systems always yield the shortest τ no matter what the linker is. Overall, the NW/L1/QD system achieves the fastest injection by ∼160 fs. This essentially stems from the shortest molecular length of L1 decreasing the distance between QDs and the substrate, subsequently improving the interfacial coupling. Meanwhile, the NW supported cases generate the less sensitive virtual states for both the QDs and NWs, ensuring a less variable interfacial coupling. These facts combined can provide understanding of the effects contributed from the linker and the oxide semiconductor morphology on charge transfer with the aim of choosing an appropriate component with fast directional electron injection.
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Affiliation(s)
- Wei-Lu Ding
- Beijing Key Laboratory of Cluster Science of Ministry of Education, Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
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10
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Rossi TP, Kuisma M, Puska MJ, Nieminen RM, Erhart P. Kohn–Sham Decomposition in Real-Time Time-Dependent Density-Functional Theory: An Efficient Tool for Analyzing Plasmonic Excitations. J Chem Theory Comput 2017; 13:4779-4790. [DOI: 10.1021/acs.jctc.7b00589] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tuomas P. Rossi
- COMP
Centre of Excellence, Department of Applied Physics, Aalto University, P.O.
Box 11100, FI-00076 Aalto, Finland
| | - Mikael Kuisma
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- Department
of Chemistry, Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Martti J. Puska
- COMP
Centre of Excellence, Department of Applied Physics, Aalto University, P.O.
Box 11100, FI-00076 Aalto, Finland
| | - Risto M. Nieminen
- COMP
Centre of Excellence, Department of Applied Physics, Aalto University, P.O.
Box 11100, FI-00076 Aalto, Finland
| | - Paul Erhart
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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11
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12
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Paes LWC, Suárez JA, Márquez AM, Sanz JF. First-principles study of nickel complex with 1,3-dithiole-2-thione-4,5-dithiolate ligands as model photosensitizers. Theor Chem Acc 2017. [DOI: 10.1007/s00214-017-2098-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Wang X, Cui Y, Yu S, Zeng Q, Yang M. Core-shell interaction and its impact on the optical absorption of pure and doped core-shell CdSe/ZnSe nanoclusters. J Chem Phys 2016; 144:134307. [PMID: 27059570 DOI: 10.1063/1.4944985] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structural, electronic, and optical properties of core-shell nanoclusters, (CdSe)(x)@(CdSe)(y) and their Zn-substituted complexes of x = 2-4 and y = 16-28, were studied with density functional theory calculations. The substitution was applied in the cores, the shells, and/or the whole clusters. All these clusters are characterized by their core-shell structures in which the core-shell interaction was found different from those in core or in shell, as reflected by their bondlengths, volumes, and binding energies. Moreover, the core and shell combine together to compose a new cluster with electronic and optical properties different from those of separated individuals, as reflected by their HOMO-LUMO gaps and optical absorptions. With the substitution of Cd by Zn, the structural, electronic, and optical properties of clusters change regularly. The binding energy increases with Zn content, attributed to the strong Zn-Se bonding. For the same core/shell, the structure with a CdSe shell/core has a narrower gap than that with a ZnSe shell/core. The optical absorption spectra also change accordingly with Zn substitution. The peaks blueshift with increasing Zn concentration, accompanying with shape variations in case large number of Cd atoms are substituted. Our calculations reveal the core-shell interaction and its influence on the electronic and optical properties of the core-shell clusters, suggesting a composition-structure-property relationship for the design of core-shell CdSe and ZnSe nanoclusters.
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Affiliation(s)
- Xinqin Wang
- Institute of Atomic and Molecular Physics, Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, People's Republic of China
| | - Yingqi Cui
- Institute of Atomic and Molecular Physics, Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, People's Republic of China
| | - Shengping Yu
- College of Chemistry and Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, People's Republic of China
| | - Qun Zeng
- Institute of Atomic and Molecular Physics, Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, People's Republic of China
| | - Mingli Yang
- Institute of Atomic and Molecular Physics, Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, People's Republic of China
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14
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Sluydts M, De Nolf K, Van Speybroeck V, Cottenier S, Hens Z. Ligand Addition Energies and the Stoichiometry of Colloidal Nanocrystals. ACS NANO 2016; 10:1462-1474. [PMID: 26714878 DOI: 10.1021/acsnano.5b06965] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Experimental nonstoichiometries of colloidal nanocrystals such as CdSe and PbS are accounted for by attributing to each constituent atom and capping ligand a formal charge equal to its most common oxidation state to obtain an overall neutral nanocrystal. In spite of its apparent simplicity, little theoretical support of this approach-called here the oxidation-number sum rule-is present in the current literature. Here, we introduce the ligand addition energy, which we define as the energy gained or expended upon the transfer of one ligand from a reference state to a metal-rich solid surface. For the combination of CdSe, ZnSe and InP with either chalcogen, halogen or hydrochalcogen ligands, we compute successive ligand addition energies using ab initio methods and determine the thermodynamically stable surface composition as that composition where ligand addition turns endothermic. We find that the oxidation-number sum rule is valid in many situations, although exceptions occur for each material studied, most notably when exposed to small oxidative ligands. In the case of InP, however, violations are more severe, extending toward the entire chalcogen ligand family. In addition, we find that electronegativity rather than chemical hardness is a reasonable predictor for ligand addition energies, with the most electronegative ligands yielding the most exothermic addition energies. Finally, we argue that the ligand addition energy will be a most useful quantity for future computational studies on the structure, stability and reactivity of nanocrystal surfaces.
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Affiliation(s)
- Michael Sluydts
- Center for Molecular Modeling, Ghent University , 9000 Gent, Belgium
| | - Kim De Nolf
- Physics and Chemistry of Nanostructures, Ghent University , 9000 Gent, Belgium
- Center for Nano and Biophotonics, Ghent University , 9000 Gent, Belgium
| | | | - Stefaan Cottenier
- Center for Molecular Modeling, Ghent University , 9000 Gent, Belgium
- Department of Materials Science and Engineering, Ghent University , 9000 Gent, Belgium
| | - Zeger Hens
- Physics and Chemistry of Nanostructures, Ghent University , 9000 Gent, Belgium
- Center for Nano and Biophotonics, Ghent University , 9000 Gent, Belgium
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15
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Cd/Hg cationic substitution in magic-sized CdSe clusters: Optical characterization and theoretical studies. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.04.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Fernando A, Weerawardene KLDM, Karimova NV, Aikens CM. Quantum Mechanical Studies of Large Metal, Metal Oxide, and Metal Chalcogenide Nanoparticles and Clusters. Chem Rev 2015; 115:6112-216. [PMID: 25898274 DOI: 10.1021/cr500506r] [Citation(s) in RCA: 217] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Amendra Fernando
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | | | - Natalia V Karimova
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Christine M Aikens
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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17
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Nadler R, Sanz JF. Effect of Capping Ligands and TiO2 Supporting on the Optical Properties of a (CdSe)13 Cluster. J Phys Chem A 2015; 119:1218-27. [DOI: 10.1021/acs.jpca.5b00625] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roger Nadler
- Department of Physical Chemistry, University of Seville, 41012 Seville, Spain
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18
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Cui Y, Lou Z, Wang X, Yu S, Yang M. A study of optical absorption of cysteine-capped CdSe nanoclusters using first-principles calculations. Phys Chem Chem Phys 2015; 17:9222-30. [DOI: 10.1039/c4cp06103a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Optical absorption of cysteine-capped CdSe nanoclusters varies with cluster size, ligands and solvents.
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Affiliation(s)
- Yingqi Cui
- Institute of Atomic and Molecular Physics
- Sichuan University
- Chengdu 610065
- China
| | - Zhaoyang Lou
- Institute of Atomic and Molecular Physics
- Sichuan University
- Chengdu 610065
- China
| | - Xinqin Wang
- Institute of Atomic and Molecular Physics
- Sichuan University
- Chengdu 610065
- China
| | - Shengping Yu
- Institute of Atomic and Molecular Physics
- Sichuan University
- Chengdu 610065
- China
| | - Mingli Yang
- Institute of Atomic and Molecular Physics
- Sichuan University
- Chengdu 610065
- China
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19
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Gao Y, Zhou B, Kang SG, Xin M, Yang P, Dai X, Wang Z, Zhou R. Effect of ligands on the characteristics of (CdSe)13quantum dots. RSC Adv 2014. [DOI: 10.1039/c4ra03202k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The absorption peak displays a clear blue-shift on the scale of 95 nm for quantum dots (CdSe)13passivated by OPMe2(CH2)nMe ligands in the ultraviolet-visible (UV-vis) spectra.
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Affiliation(s)
- Yang Gao
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun, China
| | - Bo Zhou
- Bio-X Lab
- Department of Physics
- Zhejiang University
- Hangzhou, China
| | - Seung-gu Kang
- Computational Biology Center
- IBM Thomas J. Watson Research Center
- , USA
| | - Minsi Xin
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun, China
| | - Ping Yang
- Environmental Molecular Sciences Laboratory
- Pacific Northwest National Laboratory
- Richland, USA
| | - Xing Dai
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun, China
| | - Zhigang Wang
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun, China
- State Key Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry Jilin University
| | - Ruhong Zhou
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun, China
- Computational Biology Center
- IBM Thomas J. Watson Research Center
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20
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Elward JM, Chakraborty A. Effect of Dot Size on Exciton Binding Energy and Electron-Hole Recombination Probability in CdSe Quantum Dots. J Chem Theory Comput 2013; 9:4351-9. [PMID: 26589152 DOI: 10.1021/ct400485s] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jennifer M Elward
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - Arindam Chakraborty
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
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