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Whole words. Toggle Sidebar. Zoom Out. More Information Less Information. Enter the password to open this PDF file:. Cancel OK. File name: -. File size: -. Title: -. Author: -. Subject: -. Keywords: -. Creation Date: -. Smaller particles emit blue light because the exciton energy increases as the size decreases Right. The size-dependence of the emission color comes primarily from a particle-in-a-box effect. The electron and hole that are created when the quantum dot absorbs light are bound together as an exciton by the confines of the "box". Louis Brus used first-order perturbation theory to determine that the bandgap of a semiconductor quantum dot is given approximately by:.

In this equation, the first term after the bulk bandgap is the kinetic energy due to confinement of the exciton, and the second term represents the electrostatic attractive energy between the confined electron and hole. Giansante, C. Debellis, D. Quantum-confined and enhanced optical absorption of colloidal PbS quantum dots at wavelengths with expected bulk behavior.

Optical properties of excitonic polarons in semiconductor quantum dots

Kambhampati, P. Unraveling the structure and dynamics of excitons in semiconductor quantum dots. Yazdani, N. Tuning electron-phonon interactions in nanocrystals through surface termination. Schnitzenbaumer, K. Comparison of phonon damping behavior in quantum dots capped with organic and inorganic ligands. On the kinetics and thermodynamics of excitons at the surface of semiconductor nanocrystals: are there surface excitons?

Size-Dependent Optoelectronic Properties and Controlled Doping of Semiconductor Quantum Dots

Arnolds, H. Ultrafast surface vibrational dynamics. Zhang, Z. Dalstein, L. Revealing the interplay between adsorbed molecular layers and gold nanoparticles by linear and nonlinear optical properties. Caudano, Y. Electron-phonon couplings at C 60 interfaces: a case study by two-color, infrared-visible sum-frequency generation spectroscopy. Electron Spectrosc. Tourillon, G. Total internal reflection sum-frequency generation spectroscopy and dense gold nanoparticles monolayer: a route for probing adsorbed molecules.

Nanotechnology 18 , — Blanton, S. Dielectric dispersion measurements of CdSe nanocrystal colloids: observation of a permanent dipole moment. Shim, M. Permanent dipole moment and charges in colloidal semiconductor quantum dots. Haug, H. World Scientific, Singapore Zhuang, X. Mapping molecular orientation and conformation interfaces by surface nonlinear optics. B 59 , Medintz, I.

  • Quantum Optical Properties of Semiconductor Quantum Dots?
  • Pair excitations and optical properties.
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Quantum dot bioconjugates for imaging, labelling and sensing. Sperling, R. Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles. A , — Moreels, I. Surface chemistry of colloidal pbse nanocrystals. Grisorio, R. Anderson, N. Ligand exchange and the stoichiometry of metal chalcogenide nanocrystals: spectroscopic observation of facile metal-carboxylate displacement and binding.

Noblet, T. A global method for handling fluorescence spectra at high concentration derived from the competition between emission and absorption of colloidal CdTe quantum dots. Kett, P. Structural changes in a polyelectrolyte multilayer assembly investigated by reflection absorption infrared spectroscopy and sum frequency generation spectroscopy. B , — Zhang, Y. Overview of stabilizing ligands for biocompatible quantum dot nanocrystals. Sensors 11 , — Krause, M. Linking surface chemistry to optical properties of semiconductor nanocrystals.

Hung, K. IR absorption, Raman scattering, and IR-Vis sum-frequency generation spectroscopy as quantitative probes of surface structure. Jethi, L.

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  7. Extending semiconductor nanocrystals from the quantum dot regime to the molecular cluster regime. C , — Kovalenko, M.

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    Colloidal nanocrystals with molecular metal chalcogenide surface ligands. Science , — Wolcott, A. Anomalously large polarization effect responsible for excitonic red shifts in PbSe quantum dot solids. Swenson, N. Computational study of the resonance enhancement of Raman signals of ligands adsorbed to CdSe clusters through photoexcitation of the cluster.

    Sengupta, S. Aggregated states of chalcogenorhodamine dyes on nanocrystalline titania revealed by doubly resonant sum frequency spectroscopy. Lombardi, J. Theory of surface-enhanced raman scattering in semiconductors. Barbillon, G. Localised detection of thiophenol with gold nanotriangles highly structured as honeycombs by nonlinear Sum Frequency Generation spectroscopy. Download references. The authors acknowledge Assistant Engineer B.

    Controlling the properties of matter with quantum dots

    The manuscript was achieved through contributions of all authors. Correspondence to C. Reprints and Permissions. Nano Letters The Journal of Physical Chemistry Letters Materials The Journal of Chemical Physics By submitting a comment you agree to abide by our Terms and Community Guidelines.

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    Advanced search. Skip to main content. Subjects Energy transfer Quantum dots Surface spectroscopy Surfaces, interfaces and thin films. Introduction Halfway between atomic and solid-state physics, colloidal semiconductor nanocrystals NCs , also known as quantum dots QDs , exhibit unique optoelectronic properties arising from their low dimensionality. Full size image. Results From linear to nonlinear optical response of QDs The comprehension of the coupling between CdTe NCs and their ligands requires first and foremost the characterization of their optoelectronic properties.

    Discussion CdTe NCs have just been proved to maximize the vibrational response of their ligands when they are optically pumped into their first excitonic state. Data availability The data that support the plots within this paper and other findings of this study are available from the corresponding author upon reasonable request. References 1. Article Google Scholar 4. Article Google Scholar 6. Article Google Scholar 9. Article Google Scholar Ethics declarations Competing interests The authors declare no competing interests. Electronic supplementary material Supplementary Information.

    About this article. Leger , Max R. Friedfeld , Ryan A.

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    Beck , James D. Comments By submitting a comment you agree to abide by our Terms and Community Guidelines. Download PDF. Communications Chemistry menu.