Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate

Amin, Victor A.; Aruda, Kenneth O.; Lau, Bryan; Rasmussen, Andrew M.; Edme, Kedy; Weiss, Emily A.

doi:10.1021/acs.jpcc.5b04306

Title: Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate

Abstract

Displacement of native octylphosphonate (OPA) ligands for methylthiophenolate (CH₃-TP) on the surfaces of CdSe quantum dots (QDs) causes a moderate (up to 50 meV) decrease in the band gap (E_g) of the QD. Plots of the corresponding increase in apparent excitonic radius, ΔR, of the QDs versus the surface coverage of CH₃-TP, measured by ¹H NMR, for several sizes of QDs reveal that this ligand adsorbs in two distinct binding modes, (1) a tightly bound mode (K_a = 1.0 ± 0.3 × 10⁴ M^–1) capable of exciton delocalization, and (2) a more weakly bound mode (K_a = 8.3 ± 9.9 × 10² M^–1) that has no discernible effect on exciton confinement. For tightly bound CH₃-TP, the degree of delocalization induced in the QD is approximately linearly related to the fractional surface area occupied by the ligand for all sizes of QDs. Finally, comparison of the dependence of ΔR on surface coverage of CH₃-TP over a range of physical radii of the QDs, R = 1.1–2.4 nm, to analogous plots simulated using a 3D spherical potential well model yield a value for the confinement barrier presented to the excitonic hole by tightly bound CH₃-TP of ~1 eV.

Authors:

Amin, Victor A. ^[1]; Aruda, Kenneth O. ^[1]; Lau, Bryan ^[1]; Rasmussen, Andrew M. ^[1]; Edme, Kedy ^[1]; Weiss, Emily A. ^[1]

Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry

Publication Date:: Fri Jul 24 00:00:00 EDT 2015

Research Org.:: Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:: 1386061

Grant/Contract Number:: SC0000989; SC0003998; DGE-1324585

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Physical Chemistry. C

Additional Journal Information:: Journal Volume: 119; Journal Issue: 33; Related Information: CBES partners with Northwestern University (lead); Harvard University; New York University; Pennsylvania State University; University of Michigan; University of Pittsburgh; Journal ID: ISSN 1932-7447

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Binding modes; Excitons; Quantum dots; Ligands; Quantum confinement; Catalysis (homogeneous); Solar (photovoltaic); Bio-inspired; Charge transport; Mesostructured materials; Materials and chemistry by design; Synthesis (novel materials); Synthesis (self-assembly)

Citation Formats


                    Amin, Victor A., Aruda, Kenneth O., Lau, Bryan, Rasmussen, Andrew M., Edme, Kedy, and Weiss, Emily A. Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate.  United States: N. p., 2015. 
Web.  doi:10.1021/acs.jpcc.5b04306.

Copy to clipboard


                    Amin, Victor A., Aruda, Kenneth O., Lau, Bryan, Rasmussen, Andrew M., Edme, Kedy, & Weiss, Emily A. Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate.  United States.  https://doi.org/10.1021/acs.jpcc.5b04306

Copy to clipboard


                    Amin, Victor A., Aruda, Kenneth O., Lau, Bryan, Rasmussen, Andrew M., Edme, Kedy, and Weiss, Emily A. Fri .  
"Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate".  United States.  https://doi.org/10.1021/acs.jpcc.5b04306.  https://www.osti.gov/servlets/purl/1386061.

Copy to clipboard


                    
@article{osti_1386061,

  title        = {Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate},

  author       = {Amin, Victor A. and Aruda, Kenneth O. and Lau, Bryan and Rasmussen, Andrew M. and Edme, Kedy and Weiss, Emily A.},

  abstractNote = {Displacement of native octylphosphonate (OPA) ligands for methylthiophenolate (CH3-TP) on the surfaces of CdSe quantum dots (QDs) causes a moderate (up to 50 meV) decrease in the band gap (Eg) of the QD. Plots of the corresponding increase in apparent excitonic radius, ΔR, of the QDs versus the surface coverage of CH3-TP, measured by 1H NMR, for several sizes of QDs reveal that this ligand adsorbs in two distinct binding modes, (1) a tightly bound mode (Ka = 1.0 ± 0.3 × 104 M–1) capable of exciton delocalization, and (2) a more weakly bound mode (Ka = 8.3 ± 9.9 × 102 M–1) that has no discernible effect on exciton confinement. For tightly bound CH3-TP, the degree of delocalization induced in the QD is approximately linearly related to the fractional surface area occupied by the ligand for all sizes of QDs. Finally, comparison of the dependence of ΔR on surface coverage of CH3-TP over a range of physical radii of the QDs, R = 1.1–2.4 nm, to analogous plots simulated using a 3D spherical potential well model yield a value for the confinement barrier presented to the excitonic hole by tightly bound CH3-TP of ~1 eV.},

  doi          = {10.1021/acs.jpcc.5b04306},

  journal      = {Journal of Physical Chemistry. C},

  number       = 33,

  volume       = 119,

  place        = {United States},

  year         = {Fri Jul 24 00:00:00 EDT 2015},

  month        = {Fri Jul 24 00:00:00 EDT 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1021/acs.jpcc.5b04306

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 36 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Differences in Cross-Link Chemistry between Rigid and Flexible Dithiol Molecules Revealed by Optical Studies of CdTe Quantum Dots
journal, August 2007

Koole, R.; Luigjes, B.; Tachiya, M.
The Journal of Physical Chemistry C, Vol. 111, Issue 30
DOI: 10.1021/jp072407x

Controlling the Electronic Coupling between CdSe Quantum Dots and Thiol Capping Ligands via pH and Ligand Selection
journal, July 2012

Liang, Yongqi; Thorne, James E.; Parkinson, B. A.
Langmuir, Vol. 28, Issue 30
DOI: 10.1021/la301237p

Colloidal Arenethiolate-Capped PbS Quantum Dots: Optoelectronic Properties, Self-Assembly, and Application in Solution-Cast Photovoltaics
journal, June 2013

Giansante, Carlo; Carbone, Luigi; Giannini, Cinzia
The Journal of Physical Chemistry C, Vol. 117, Issue 25
DOI: 10.1021/jp403066q

“Darker-than-Black” PbS Quantum Dots: Enhancing Optical Absorption of Colloidal Semiconductor Nanocrystals via Short Conjugated Ligands
journal, January 2015

Giansante, Carlo; Infante, Ivan; Fabiano, Eduardo
Journal of the American Chemical Society, Vol. 137, Issue 5
DOI: 10.1021/ja510739q

Relaxation of Exciton Confinement in CdSe Quantum Dots by Modification with a Conjugated Dithiocarbamate Ligand
journal, May 2010

Frederick, Matthew T.; Weiss, Emily A.
ACS Nano, Vol. 4, Issue 6
DOI: 10.1021/nn1007435

A Molecule to Detect and Perturb the Confinement of Charge Carriers in Quantum Dots
journal, December 2011

Frederick, Matthew T.; Amin, Victor A.; Cass, Laura C.
Nano Letters, Vol. 11, Issue 12
DOI: 10.1021/nl203222m

Control of Exciton Confinement in Quantum Dot–Organic Complexes through Energetic Alignment of Interfacial Orbitals
journal, December 2012

Frederick, Matthew T.; Amin, Victor A.; Swenson, Nathaniel K.
Nano Letters, Vol. 13, Issue 1
DOI: 10.1021/nl304098e

Optical Properties of Strongly Coupled Quantum Dot–Ligand Systems
journal, February 2013

Frederick, Matthew T.; Amin, Victor A.; Weiss, Emily A.
The Journal of Physical Chemistry Letters, Vol. 4, Issue 4
DOI: 10.1021/jz301905n

Photoemission Spectroscopy of Tethered CdSe Nanocrystals: Shifts in Ionization Potential and Local Vacuum Level As a Function of Nanocrystal Capping Ligand
journal, March 2010

Munro, Andrea M.; Zacher, Brian; Graham, Amy
ACS Applied Materials & Interfaces, Vol. 2, Issue 3
DOI: 10.1021/am900834y

Enhanced Rate of Radiative Decay in CdSe Quantum Dots upon Adsorption of an Exciton-Delocalizing Ligand
journal, August 2014

Jin, Shengye; Harris, Rachel D.; Lau, Bryan
Nano Letters, Vol. 14, Issue 9
DOI: 10.1021/nl5023699

A Solution NMR Toolbox for Characterizing the Surface Chemistry of Colloidal Nanocrystals
journal, February 2013

Hens, Zeger; Martins, José C.
Chemistry of Materials, Vol. 25, Issue 8
DOI: 10.1021/cm303361s

Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals
journal, July 2003

Yu, W. William; Qu, Lianhua; Guo, Wenzhuo
Chemistry of Materials, Vol. 15, Issue 14, p. 2854-2860
DOI: 10.1021/cm034081k

An in situ infrared spectroscopic study of ligand adsorption from aqueous solutions to cadmium telluride particle films
journal, December 2001

De Silva, K. T. L.; McQuillan, A. J.
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 194, Issue 1-3
DOI: 10.1016/S0927-7757(01)00787-7

The Effects of Chemisorption on the Luminescence of CdSe Quantum Dots
journal, March 2006

Bullen, C.; Mulvaney, P.
Langmuir, Vol. 22, Issue 7
DOI: 10.1021/la051898e

Quantitative Study of the Effects of Surface Ligand Concentration on CdSe Nanocrystal Photoluminescence
journal, May 2007

Munro, Andrea M.; Jen-La Plante, Ilan; Ng, Marsha S.
The Journal of Physical Chemistry C, Vol. 111, Issue 17
DOI: 10.1021/jp068733e

Time-Dependent Photoluminescence Spectroscopy as a Tool to Measure the Ligand Exchange Kinetics on a Quantum Dot Surface
journal, August 2008

Koole, Rolf; Schapotschnikow, Philipp; de Mello Donegá, Celso
ACS Nano, Vol. 2, Issue 8
DOI: 10.1021/nn8003247

Size-Dependent Dissociation pH of Thiolate Ligands from Cadmium Chalcogenide Nanocrystals
journal, February 2005

Aldana, Jose; Lavelle, Natasha; Wang, Yunjun
Journal of the American Chemical Society, Vol. 127, Issue 8
DOI: 10.1021/ja047000+

Adsorption and Binding of Ligands to CdSe Nanocrystals
journal, June 2009

Schapotschnikow, Philipp; Hommersom, Bob; Vlugt, Thijs J. H.
The Journal of Physical Chemistry C, Vol. 113, Issue 29
DOI: 10.1021/jp903291d

Ion-solvent molecule interactions in the gas phase. The potassium ion and benzene
journal, June 1981

Sunner, Jan; Nishizawa, Kazushige; Kebarle, Paul
The Journal of Physical Chemistry, Vol. 85, Issue 13
DOI: 10.1021/j150613a011

The Cation−π Interaction
journal, June 2012

Dougherty, Dennis A.
Accounts of Chemical Research, Vol. 46, Issue 4
DOI: 10.1021/ar300265y

Aromatic rings act as hydrogen bond acceptors
journal, June 1988

Levitt, Michael; Perutz, Max F.
Journal of Molecular Biology, Vol. 201, Issue 4
DOI: 10.1016/0022-2836(88)90471-8

CH/π hydrogen bonds in organic and organometallic chemistry
journal, January 2009

Nishio, Motohiro; Umezawa, Yoji; Honda, Kazumasa
CrystEngComm, Vol. 11, Issue 9
DOI: 10.1039/b902318f

The nature of .pi.-.pi. interactions
journal, July 1990

Hunter, Christopher A.; Sanders, Jeremy K. M.
Journal of the American Chemical Society, Vol. 112, Issue 14
DOI: 10.1021/ja00170a016

Symmetry-Controlled Colloidal Nanocrystals: Nonhydrolytic Chemical Synthesis and Shape Determining Parameters
journal, August 2005

Jun, Young-wook; Lee, Jae-Hyun; Choi, Jin-sil
The Journal of Physical Chemistry B, Vol. 109, Issue 31
DOI: 10.1021/jp052257v

The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide
journal, December 2009

Morris-Cohen, Adam J.; Donakowski, Martin D.; Knowles, Kathryn E.
The Journal of Physical Chemistry C, Vol. 114, Issue 2
DOI: 10.1021/jp909492w

Organic Surfactant-Controlled Composition of the Surfaces of CdSe Quantum Dots
journal, March 2010

Morris-Cohen, Adam J.; Frederick, Matthew T.; Lilly, G. Daniel
The Journal of Physical Chemistry Letters, Vol. 1, Issue 7
DOI: 10.1021/jz100224q

Short-Chain Alcohols Strip X-Type Ligands and Quench the Luminescence of PbSe and CdSe Quantum Dots, Acetonitrile Does Not
journal, December 2012

Hassinen, Antti; Moreels, Iwan; De Nolf, Kim
Journal of the American Chemical Society, Vol. 134, Issue 51
DOI: 10.1021/ja308861d

Ligand Exchange and the Stoichiometry of Metal Chalcogenide Nanocrystals: Spectroscopic Observation of Facile Metal-Carboxylate Displacement and Binding
journal, November 2013

Anderson, Nicholas C.; Hendricks, Mark P.; Choi, Joshua J.
Journal of the American Chemical Society, Vol. 135, Issue 49, p. 18536-18548
DOI: 10.1021/ja4086758

Works referencing / citing this record:

Influence of an exciton-delocalizing ligand on the structural, electronic, and spectral features of the Cd ₃₃ S ₃₃ quantum dot: insights from computational studies
journal, January 2018

Li, Wei; Lu, Teng-Fei; Ren, Wenhui
Journal of Materials Chemistry C, Vol. 6, Issue 32
DOI: 10.1039/c8tc03342k

Similar Records in DOE PAGES and OSTI.GOV collections:

Description of the Adsorption and Exciton Delocalizing Properties of p -Substituted Thiophenols on CdSe Quantum Dots

Journal Article Aruda, Kenneth O. ; Amin, Victor A. ; Thompson, Christopher M. ; ... - Langmuir

Here, we describe the quantitative characterization of the interfacial chemical and electronic structure of CdSe quantum dots (QDs) coated in one of five p-substituted thiophenolates (X-TP, X = NH₂, CH₃O, CH₃, Cl, or NO₂), and the dependence of this structure on the p-substituent X. ¹H NMR spectra of mixtures of CdSe QDs and X-TPs yield the number of X-TPs bound to the surface of each QD. The binding data, in combination with the shift in the energy of the first excitonic peak of the QDs as a function of the surface coverage of X-TP and Raman and NMR analysis ofmore »« less
Cited by 18
https://doi.org/10.1021/acs.langmuir.6b00689

Full Text Available
Role of Interligand Coupling in Determining the Interfacial Electronic Structure of Colloidal CdS Quantum Dots

Journal Article Harris, Rachel D. ; Amin, Victor A. ; Lau, Bryan ; ... - ACS Nano

Displacement of cadmium oleate (Cd(oleate)₂) ligands for the exciton-delocalizing ligand 4-hexylphenyldithiocarbamate (C6-PTC) on the surfaces of CdS quantum dots (QDs) causes a decrease in the band gap (E_g) of the QD of ~100 meV for QDs with a radius of 1.9 nm and ~50 meV for QDs with a radius of 2.5 nm. The primary mechanism of this decrease in band gap, deduced in previous work, is a decrease in the confinement barrier for the excitonic hole. The increase in apparent excitonic radius of the QD that corresponds to this decrease in E_g is denoted ΔR. The dependence of ΔRmore »« less
Cited by 36
https://doi.org/10.1021/acsnano.5b06837

Full Text Available
Chemical Control of Charge Trapping and Charge Transfer Processes at the Organic-Inorganic Interface within Quantum Dot-Organic Complexes

Technical Report Weiss, Emily A.

Within the research program funded through the Early Career Research Award we designed complexes of colloidal semiconductor quantum dots (QDs) and organic molecules in which the interfacial chemistry controls the electronic structure and dynamics of the excitonic state of the QD. The program included two main projects; (1) investigation of the mechanisms by which organic surfactants control the quantum confinement of excitonic charge carriers; and (2) development of models for electron transfer between QDs and adsorbed molecules as a function of interfacial chemistry. This project was extremely successful in that our achievements in those two areas addressed the great majoritymore »« less
https://doi.org/10.2172/1225212

Full Text Available
Delocalization and stretch-bend mixing of the HOH bend in liquid water

Journal Article Carpenter, William B. ; Fournier, Joseph A. ; Biswas, Rajib ; ... - Journal of Chemical Physics

Liquid water’s rich sub-picosecond vibrational dynamics arise from the interplay of different high- and low-frequency modes evolving in a strong yet fluctuating hydrogen bond network. Recent studies of the OH stretching excitations of H₂O indicate that they are delocalized over several molecules, raising questions about whether the bending vibrations are similarly delocalized. In this paper, we take advantage of an improved 50 fs time-resolution and broadband infrared (IR) spectroscopy to interrogate the 2D IR lineshape and spectral dynamics of the HOH bending vibration of liquid H2O. Indications of strong bend-stretch coupling are observed in early time 2D IR spectra throughmore »« less
Cited by 44
https://doi.org/10.1063/1.4987153

Full Text Available
Application of resonance Raman spectroscopy to electronic structure in metal complex excited states. Excited-state ordering and electron delocalization in dipyrido[3,2-a: 2`,3`-c] phenazine (dppz): Complexes of Re(I) and Ru(II)

Journal Article Schoonover, J R ; Bates, D W ; Meyer, T J - Inorganic Chemistry

Excited-state ordering and electron delocalization in Dipyrido[3,2-a:2`,3`-c]phenazine (dppz): Complexes of Re(I) and Ru(II). From excitation-dependent, resonance Raman measurements on [Ru(dmb){sub 2}(dppz)]{sup 2+} (dmp is ,4`-dimethyl-2,2`-bipyridine; dppz is dipyrido [3,2-a:2`,3`-c]phenazine) in CH{sub 3}CN a metal-to-metal ligand charge transfer (MLCT) band at 450 nm is Ru{sup II} (d{pi}){r_arrow} dmb ({pi}){sup *} in character with Ru{sup II}(d{pi}){r_arrow}dppz ({pi}){sup *} appearing as a shoulder at {approx} 490 ligand and point to delocalization of the excited electron over the entire ligand framework. From transient resonance Raman measurements on fac-[Re(dppz)(CO){sub 3-}(PPh{sub 3})] + (PPh{sub 3} is triphenylphosphine) and fac-[Re(dppz)(CO){sub 3-}Cl], the lowest excited state in bothmore »« less
https://doi.org/10.1021/ic00130a004

Similar Records

Title: Dependence of the Band Gap of CdSe Quantum Dots on the Surface Coverage and Binding Mode of an Exciton-Delocalizing Ligand, Methylthiophenolate

Abstract

Citation Formats

Differences in Cross-Link Chemistry between Rigid and Flexible Dithiol Molecules Revealed by Optical Studies of CdTe Quantum Dots journal, August 2007

Controlling the Electronic Coupling between CdSe Quantum Dots and Thiol Capping Ligands via pH and Ligand Selection journal, July 2012

Colloidal Arenethiolate-Capped PbS Quantum Dots: Optoelectronic Properties, Self-Assembly, and Application in Solution-Cast Photovoltaics journal, June 2013

“Darker-than-Black” PbS Quantum Dots: Enhancing Optical Absorption of Colloidal Semiconductor Nanocrystals via Short Conjugated Ligands journal, January 2015

Relaxation of Exciton Confinement in CdSe Quantum Dots by Modification with a Conjugated Dithiocarbamate Ligand journal, May 2010

A Molecule to Detect and Perturb the Confinement of Charge Carriers in Quantum Dots journal, December 2011

Control of Exciton Confinement in Quantum Dot–Organic Complexes through Energetic Alignment of Interfacial Orbitals journal, December 2012

Optical Properties of Strongly Coupled Quantum Dot–Ligand Systems journal, February 2013

Photoemission Spectroscopy of Tethered CdSe Nanocrystals: Shifts in Ionization Potential and Local Vacuum Level As a Function of Nanocrystal Capping Ligand journal, March 2010

Enhanced Rate of Radiative Decay in CdSe Quantum Dots upon Adsorption of an Exciton-Delocalizing Ligand journal, August 2014

A Solution NMR Toolbox for Characterizing the Surface Chemistry of Colloidal Nanocrystals journal, February 2013

Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals journal, July 2003

An in situ infrared spectroscopic study of ligand adsorption from aqueous solutions to cadmium telluride particle films journal, December 2001

The Effects of Chemisorption on the Luminescence of CdSe Quantum Dots journal, March 2006

Quantitative Study of the Effects of Surface Ligand Concentration on CdSe Nanocrystal Photoluminescence journal, May 2007

Time-Dependent Photoluminescence Spectroscopy as a Tool to Measure the Ligand Exchange Kinetics on a Quantum Dot Surface journal, August 2008

Size-Dependent Dissociation pH of Thiolate Ligands from Cadmium Chalcogenide Nanocrystals journal, February 2005

Adsorption and Binding of Ligands to CdSe Nanocrystals journal, June 2009

Ion-solvent molecule interactions in the gas phase. The potassium ion and benzene journal, June 1981

The Cation−π Interaction journal, June 2012

Aromatic rings act as hydrogen bond acceptors journal, June 1988

CH/π hydrogen bonds in organic and organometallic chemistry journal, January 2009

The nature of .pi.-.pi. interactions journal, July 1990

Symmetry-Controlled Colloidal Nanocrystals: Nonhydrolytic Chemical Synthesis and Shape Determining Parameters journal, August 2005

The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide journal, December 2009

Organic Surfactant-Controlled Composition of the Surfaces of CdSe Quantum Dots journal, March 2010

Short-Chain Alcohols Strip X-Type Ligands and Quench the Luminescence of PbSe and CdSe Quantum Dots, Acetonitrile Does Not journal, December 2012

Ligand Exchange and the Stoichiometry of Metal Chalcogenide Nanocrystals: Spectroscopic Observation of Facile Metal-Carboxylate Displacement and Binding journal, November 2013

Influence of an exciton-delocalizing ligand on the structural, electronic, and spectral features of the Cd 33 S 33 quantum dot: insights from computational studies journal, January 2018

Differences in Cross-Link Chemistry between Rigid and Flexible Dithiol Molecules Revealed by Optical Studies of CdTe Quantum Dots
journal, August 2007

Controlling the Electronic Coupling between CdSe Quantum Dots and Thiol Capping Ligands via pH and Ligand Selection
journal, July 2012

Colloidal Arenethiolate-Capped PbS Quantum Dots: Optoelectronic Properties, Self-Assembly, and Application in Solution-Cast Photovoltaics
journal, June 2013

“Darker-than-Black” PbS Quantum Dots: Enhancing Optical Absorption of Colloidal Semiconductor Nanocrystals via Short Conjugated Ligands
journal, January 2015

Relaxation of Exciton Confinement in CdSe Quantum Dots by Modification with a Conjugated Dithiocarbamate Ligand
journal, May 2010

A Molecule to Detect and Perturb the Confinement of Charge Carriers in Quantum Dots
journal, December 2011

Control of Exciton Confinement in Quantum Dot–Organic Complexes through Energetic Alignment of Interfacial Orbitals
journal, December 2012

Optical Properties of Strongly Coupled Quantum Dot–Ligand Systems
journal, February 2013

Photoemission Spectroscopy of Tethered CdSe Nanocrystals: Shifts in Ionization Potential and Local Vacuum Level As a Function of Nanocrystal Capping Ligand
journal, March 2010

Enhanced Rate of Radiative Decay in CdSe Quantum Dots upon Adsorption of an Exciton-Delocalizing Ligand
journal, August 2014

A Solution NMR Toolbox for Characterizing the Surface Chemistry of Colloidal Nanocrystals
journal, February 2013

Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals
journal, July 2003

An in situ infrared spectroscopic study of ligand adsorption from aqueous solutions to cadmium telluride particle films
journal, December 2001

The Effects of Chemisorption on the Luminescence of CdSe Quantum Dots
journal, March 2006

Quantitative Study of the Effects of Surface Ligand Concentration on CdSe Nanocrystal Photoluminescence
journal, May 2007

Time-Dependent Photoluminescence Spectroscopy as a Tool to Measure the Ligand Exchange Kinetics on a Quantum Dot Surface
journal, August 2008

Size-Dependent Dissociation pH of Thiolate Ligands from Cadmium Chalcogenide Nanocrystals
journal, February 2005

Adsorption and Binding of Ligands to CdSe Nanocrystals
journal, June 2009

Ion-solvent molecule interactions in the gas phase. The potassium ion and benzene
journal, June 1981

The Cation−π Interaction
journal, June 2012

Aromatic rings act as hydrogen bond acceptors
journal, June 1988

CH/π hydrogen bonds in organic and organometallic chemistry
journal, January 2009

The nature of .pi.-.pi. interactions
journal, July 1990

Symmetry-Controlled Colloidal Nanocrystals: Nonhydrolytic Chemical Synthesis and Shape Determining Parameters
journal, August 2005

The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide
journal, December 2009

Organic Surfactant-Controlled Composition of the Surfaces of CdSe Quantum Dots
journal, March 2010

Short-Chain Alcohols Strip X-Type Ligands and Quench the Luminescence of PbSe and CdSe Quantum Dots, Acetonitrile Does Not
journal, December 2012

Ligand Exchange and the Stoichiometry of Metal Chalcogenide Nanocrystals: Spectroscopic Observation of Facile Metal-Carboxylate Displacement and Binding
journal, November 2013

Influence of an exciton-delocalizing ligand on the structural, electronic, and spectral features of the Cd ₃₃ S ₃₃ quantum dot: insights from computational studies
journal, January 2018