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Title: Aqueous Synthesis of Zinc Blende CdTe/CdS Magic-Core/Thick-Shell Tetrahedral-Shaped Nanocrystals with Emission Tunable to Near-Infrared

Abstract

We demonstrate the synthesis of near-IR-emitting zinc blende CdTe/CdS tetrahedral-shaped nanocrystals with a magic-sized (~0.8 nm radius) CdTe core and a thick CdS shell (up to 5 nm). These high-quality water-soluble nanocrystals were obtained by a simple but reliable aqueous method at low temperature. During the growth of the shell over the magic core, the core/shell nanocrystals change from type I to type II, as revealed by their enormous photoluminescence (PL) emission peak shift (from 480 to 820 nm) and significant increase in PL lifetime (from ~1 to ~245 ns). These thick-shell nanocrystals have a high PL quantum yield, high photostability, compact size (hydrodynamic diameter less than 11.0 nm), and reduced blinking behavior. The magic-core/thick-shell nanocrystals may represent an important step toward the synthesis and application of next-generation colloidal nanocrystals from solar cell conversion to intracellular imaging.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Arizona State Univ., Tempe, AZ (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC); Center for Bio-Inspired Solar Fuel Production (BISfuel)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1064828
DOE Contract Number:  
SC0001016
Resource Type:
Journal Article
Journal Name:
J. Am. Chem. Soc.
Additional Journal Information:
Journal Volume: 132; Journal Issue: 16; Related Information: BISfuel partners with Arizona State University.
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; catalysis (homogeneous); catalysis (heterogeneous); solar (fuels); photosynthesis (natural and artificial); bio-inspired; hydrogen and fuel cells; electrodes - solar; charge transport; materials and chemistry by design; synthesis (novel materials); synthesis (self-assembly)

Citation Formats

Deng, Zhengtao, Schulz, Olaf, Lin, Su, Ding, Baoquan, Liu, Xiaowei, Wei, XiXi, Ros, Robert, Yan, Hao, and Liu, Yan. Aqueous Synthesis of Zinc Blende CdTe/CdS Magic-Core/Thick-Shell Tetrahedral-Shaped Nanocrystals with Emission Tunable to Near-Infrared. United States: N. p., 2010. Web. doi:10.1021/ja101476b.
Deng, Zhengtao, Schulz, Olaf, Lin, Su, Ding, Baoquan, Liu, Xiaowei, Wei, XiXi, Ros, Robert, Yan, Hao, & Liu, Yan. Aqueous Synthesis of Zinc Blende CdTe/CdS Magic-Core/Thick-Shell Tetrahedral-Shaped Nanocrystals with Emission Tunable to Near-Infrared. United States. doi:10.1021/ja101476b.
Deng, Zhengtao, Schulz, Olaf, Lin, Su, Ding, Baoquan, Liu, Xiaowei, Wei, XiXi, Ros, Robert, Yan, Hao, and Liu, Yan. Mon . "Aqueous Synthesis of Zinc Blende CdTe/CdS Magic-Core/Thick-Shell Tetrahedral-Shaped Nanocrystals with Emission Tunable to Near-Infrared". United States. doi:10.1021/ja101476b.
@article{osti_1064828,
title = {Aqueous Synthesis of Zinc Blende CdTe/CdS Magic-Core/Thick-Shell Tetrahedral-Shaped Nanocrystals with Emission Tunable to Near-Infrared},
author = {Deng, Zhengtao and Schulz, Olaf and Lin, Su and Ding, Baoquan and Liu, Xiaowei and Wei, XiXi and Ros, Robert and Yan, Hao and Liu, Yan},
abstractNote = {We demonstrate the synthesis of near-IR-emitting zinc blende CdTe/CdS tetrahedral-shaped nanocrystals with a magic-sized (~0.8 nm radius) CdTe core and a thick CdS shell (up to 5 nm). These high-quality water-soluble nanocrystals were obtained by a simple but reliable aqueous method at low temperature. During the growth of the shell over the magic core, the core/shell nanocrystals change from type I to type II, as revealed by their enormous photoluminescence (PL) emission peak shift (from 480 to 820 nm) and significant increase in PL lifetime (from ~1 to ~245 ns). These thick-shell nanocrystals have a high PL quantum yield, high photostability, compact size (hydrodynamic diameter less than 11.0 nm), and reduced blinking behavior. The magic-core/thick-shell nanocrystals may represent an important step toward the synthesis and application of next-generation colloidal nanocrystals from solar cell conversion to intracellular imaging.},
doi = {10.1021/ja101476b},
journal = {J. Am. Chem. Soc.},
number = 16,
volume = 132,
place = {United States},
year = {2010},
month = {4}
}