Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Ligand-Induced Size-Dependent Circular Dichroism in Quantum Dots

Journal Article · · Journal of Physical Chemistry Letters
 [1];  [2];  [3]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Santa Barbara, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Tel Aviv Univ., Tel Aviv (Israel); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Recent experiments have probed the chiral properties of semiconductor nanocrystal (NC) quantum dots (QDs), but understanding the circular dichroism line shape, excitonic features, and chirality induction mechanism remains a challenge. We propose an atomistic pseudopotential method to model chiral ligand passivated QDs, computing circular dichroism (CD) spectra for CdSe QDs (2.6-3.8 nm). We find strong agreement between calculated and measured line shapes, predicting consistent bisignate line shapes with decreasing CD magnitude as size increases. Further, our analysis reveals the origin of bisignate line shapes, arising from nondegenerate excitons with opposing angular momenta. We also explore the impact of chiral ligand orientation on QD surfaces, observing changes in the optical activity magnitude and sign. This orientation sensitivity offers the means to distinguish ordered from disordered ligand configurations, facilitating the study of order-disorder transitions at ligand-QD interfaces.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); National Science Foundation (NSF)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2500822
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 31 Vol. 15; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (62)

Optically Active CdSe/CdS Nanoplatelets Exhibiting Both Circular Dichroism and Circularly Polarized Luminescence journal July 2021
Induced circular dichroism by chiral molecular interaction journal January 2003
Chiral LigandInduced Circular Dichroism in Excitonic Absorption of Colloidal Quantum Dots journal December 2012
Very Large Electronic Structure Calculations Using an Out-of-Core Filter-Diagonalization Method journal July 2002
Quantenmechanische Theorie der nat�rlichen optischen Aktivit�t von Fl�ssigkeiten und Gasen journal March 1929
Quantum dot solar cells journal April 2002
Probing ligand removal and ordering at quantum dot surfaces using vibrational sum frequency generation spectroscopy journal March 2019
Thermodynamics of the Adsorption of Cadmium Oleate to Cadmium Sulfide Quantum Dots and Implications of a Dynamic Ligand Shell journal July 2022
Optical Activity and Circular Dichroism of Perovskite Quantum-Dot Molecules journal January 2019
Theory of Photoluminescence Spectral Line Shapes of Semiconductor Nanocrystals journal August 2023
Optical Activity and Excitonic Characteristics of Chiral CdSe Quantum Dots journal March 2024
Probing the Interaction of Quantum Dots with Chiral Capping Molecules Using Circular Dichroism Spectroscopy journal November 2016
Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets journal October 2018
Ligand-Induced Chirality in Asymmetric CdSe/CdS Nanostructures: A Close Look at Chiral Tadpoles journal August 2020
Ligand-Mediated Interactions between Nanoscale Surfaces Depend Sensitively and Nonlinearly on Temperature, Facet Dimensions, and Ligand Coverage journal January 2016
Chirality Inversion of CdSe and CdS Quantum Dots without Changing the Stereochemistry of the Capping Ligand journal February 2016
Optically Active CdSe-Dot/CdS-Rod Nanocrystals with Induced Chirality and Circularly Polarized Luminescence journal May 2018
Unsaturated Ligands Seed an Order to Disorder Transition in Mixed Ligand Shells of CdSe/CdS Quantum Dots journal November 2019
Chemical, Structural, and Quantitative Analysis of the Ligand Shells of Colloidal Quantum Dots journal September 2012
Electronic Structure Pseudopotential Calculations of Large (.apprx.1000 Atoms) Si Quantum Dots journal February 1994
Luminescence Temperature Antiquenching of Water-Soluble CdTe Quantum Dots:  Role of the Solvent journal August 2004
Surface-Amplified Ligand Disorder in CdSe Quantum Dots Determined by Electron and Coherent Vibrational Spectroscopies journal May 2011
Enhancing Circularly Polarized Luminescence in Quantum Dots through Chiral Coordination-Mediated Growth at the Liquid/Liquid Interface journal October 2023
Molecular Weight, Osmotic Second Virial Coefficient, and Extinction Coefficient of Colloidal CdSe Nanocrystals journal May 2002
Re-examination of the Size-Dependent Absorption Properties of CdSe Quantum Dots journal October 2009
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals journal January 1996
Orientational Ordering of Passivating Ligands on CdS Nanorods in Solution Generates Strong Rod–Rod Interactions journal December 2013
Dislocation-Induced Chirality of Semiconductor Nanocrystals journal February 2015
Size Dependence of Chiroptical Activity in Colloidal Quantum Dots journal October 2011
Ligand Induced Circular Dichroism and Circularly Polarized Luminescence in CdSe Quantum Dots journal November 2013
Energy Level Modification in Lead Sulfide Quantum Dot Thin Films through Ligand Exchange journal May 2014
Shape control of CdSe nanocrystals journal March 2000
Electroluminescence from single monolayers of nanocrystals in molecular organic devices journal December 2002
Ultrasensitive solution-cast quantum dot photodetectors journal July 2006
Quantum dot bioconjugates for imaging, labelling and sensing journal June 2005
The surface science of nanocrystals journal January 2016
Observation of ordered organic capping ligands on semiconducting quantum dots via powder X-ray diffraction journal May 2021
Materials for chiral light control journal March 2023
Colloidal quantum dot electronics journal August 2021
Measurement of ligand coverage on cadmium selenide nanocrystals and its influence on dielectric dependent photoluminescence intermittency journal June 2019
The role of organic ligand shell structures in colloidal nanocrystal synthesis journal February 2022
Quantum-dot supercrystals for future nanophotonics journal April 2013
Chiral quantum supercrystals with total dissymmetry of optical response journal March 2016
Controlling the structures of organic semiconductor–quantum dot nanocomposites through ligand shell chemistry journal January 2020
Chiral highly luminescent CdS quantum dots journal January 2007
Chiral inorganic nanoparticles: origin, optical properties and bioapplications journal January 2011
Chirality and chiroptical effects in inorganic nanocrystal systems with plasmon and exciton resonances journal January 2013
Electron–electron and electron‐hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic state journal May 1984
Extraction, through filter‐diagonalization, of general quantum eigenvalues or classical normal mode frequencies from a small number of residues or a short‐time segment of a signal. I. Theory and application to a quantum‐dynamics model journal May 1995
Electronic properties of CdSe nanocrystals in the absence and presence of a dielectric medium journal March 1999
Optical activity of chirally distorted nanocrystals journal May 2016
Simulations of nonradiative processes in semiconductor nanocrystals journal July 2022
Quantum Dot Research: Current State and Future Prospects journal July 2002
Pseudopotential calculations of nanoscale CdSe quantum dots journal April 1996
Electronic structures of [110]-faceted self-assembled pyramidal InAs/GaAs quantum dots journal February 1999
Many-body pseudopotential theory of excitons in InP and CdSe quantum dots journal July 1999
Pseudopotential calculation of the excitonic fine structure of million-atom self-assembled In 1 − x Ga x A s / G a A s quantum dots journal April 2003
Scalable qubit architecture based on holes in quantum dot molecules journal August 2012
Coherent Two-Electron Spin Qubits in an Optically Active Pair of Coupled InGaAs Quantum Dots journal September 2012
Direct Pseudopotential Calculation of Exciton Coulomb and Exchange Energies in Semiconductor Quantum Dots journal February 1997
The Electronic Structure of Semiconductor Nanocrystals journal August 2000
Ligand-induced chirality and optical activity in semiconductor nanocrystals: theory and applications journal November 2020

Similar Records

Ultrafast hole relaxation dynamics in quantum dots revealed by two-dimensional electronic spectroscopy
Journal Article · Thu Mar 16 00:00:00 EDT 2023 · Communications Physics · OSTI ID:2229063

Electron-donating functional groups strengthen ligand-induced chiral imprinting on CsPbBr3 quantum dots
Journal Article · Tue Jan 02 23:00:00 EST 2024 · Scientific Reports · OSTI ID:2275006

Chirality Control of Electron Transfer in Quantum Dot Assemblies
Journal Article · Tue Jun 13 00:00:00 EDT 2017 · Journal of the American Chemical Society · OSTI ID:1604895