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Title: Size-dependent lattice dynamics of atomically precise cadmium selenide quantum dots

Journal Article · · Physical Review Letters
 [1]; ORCiD logo [2];  [1];  [3];  [1];  [4];  [5];  [5]
  1. Columbia Univ., New York, NY (United States)
  2. Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. American Physical Society, Ridge, NY (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Miami Univ., Oxford, OH (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)

Material properties depend sensitively on the atomic arrangements and atomic bonding, but these are notoriously difficult to measure in nanosized atomic clusters due to the small size of the objects and the challenge of obtaining bulk samples of identical clusters. Here we have combined the recent ability to make gram quantities of identical semiconductor quantum-dot nanoparticles with the ability to measure lattice dynamics on small sample quantities of hydrogenated materials using high energy resolution inelastic x-ray scattering (HERIX), to measure the size-dependence of the phonon density of states (PDOS) in CdSe quantum dots. The fact that we have atomically precise structural models for these nanoparticles allows the calculation of the PDOS using Density Functional Theory (DFT), providing both experimental and theoretical confirmations of the important role that the inertia of the surface capping species plays on determining the lattice dynamics.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; SC0012704
OSTI ID:
1489740
Report Number(s):
BNL--210839-2019-JAAM
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 122; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (39)

Ab initio Determination of Solid-State Nanostructure. journal June 2006
Introduction to lattice dynamics journal August 1994
Introduction to lattice dynamics journal July 1994
An X-ray scattering beamline for studying dynamics journal March 2000
The phonon dispersion of wurtzite CdSe journal March 1999
Introduction to Lattice Dynamics book February 2010
Computational Study of Magic-Size CdSe Clusters with Complementary Passivation by Carboxylic and Amine Ligands journal April 2016
Atomic Structures and Gram Scale Synthesis of Three Tetrahedral Quantum Dots journal July 2014
Transition from Molecular Vibrations to Phonons in Atomically Precise Cadmium Selenide Quantum Dots journal December 2016
Insights about the Surface of Colloidal Nanoclusters from Their Vibrational and Thermodynamic Properties journal May 2012
DOS: Evaluation of phonon density of states from nuclear resonant inelastic absorption journal January 2000
Quantum dots go on display journal January 2013
Ab initio determination of solid-state nanostructure journal March 2006
Quantum dot bioconjugates for imaging, labelling and sensing journal June 2005
Compact high-quality CdSe–CdS core–shell nanocrystals with narrow emission linewidths and suppressed blinking journal February 2013
High-efficiency light-emitting devices based on quantum dots with tailored nanostructures journal March 2015
Electronic structure of AlFeN films exhibiting crystallographic orientation change from c- to a-axis with Fe concentrations and annealing effect journal February 2020
Confirmation of disordered structure of ultrasmall CdSe nanoparticles from X-ray atomic pair distribution function analysis journal January 2013
Two-dimensional detector software: From real detector to idealised image or two-theta scan journal January 1996
Phonon spectroscopy by inelastic x-ray scattering journal January 2000
Spectroscopy with meV energy resolution journal August 2001
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Phonon density of states probed by inelastic x-ray scattering journal December 2005
Quantitative size-dependent structure and strain determination of CdSe nanoparticles using atomic pair distribution function analysis journal September 2007
First-principles calculations of the ferroelastic transition between rutile-type and CaCl 2 -type SiO 2 at high pressures journal October 2008
Effect of hydrogen passivation on the electronic structure of ionic semiconductor nanostructures journal May 2012
Size-dependent evolution of the atomic vibrational density of states and thermodynamic properties of isolated Fe nanoparticles journal October 2012
Vibrational Properties of Nanograins and Interfaces in Nanocrystalline Materials journal June 2008
Phonons and related crystal properties from density-functional perturbation theory journal July 2001
Rapid-acquisition pair distribution function (RA-PDF) analysis journal November 2003
PDFgetX3 : a rapid and highly automatable program for processing powder diffraction data into total scattering pair distribution functions journal March 2013
New developments in fabrication of high-energy-resolution analyzers for inelastic X-ray spectroscopy journal March 2011
Six-reflection meV-monochromator for synchrotron radiation journal May 2011
The Problem with Determining Atomic Structure at the Nanoscale journal April 2007
Exploring the bounds of narrow-band quantum dot downconverted LEDs journal January 2017
QLEDs for displays and solid-state lighting journal September 2013
Quantitative size-dependent structure and strain determination of CdSe nanoparticles using atomic pair distribution function analysis text January 2007
PDFgetX3: A rapid and highly automatable program for processing powder diffraction data into total scattering pair distribution functions text January 2012