Quantized doping of CdS quantum dots with twelve gold atoms

No Thumbnail Available
File version
Author(s)
Yu, Junlai
Zhang, Hui
Xu, Wenhao
Liu, Guangnan
Tang, Yun
Zhao, Dongyuan
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2021
Size
File type(s)
Location
License
Abstract

Through a bottom-up strategy, CdS quantum dots (QDs) doped with 12 gold atoms in each nanocrystal (NC) were prepared by cation exchange reactions. The (Au12) dopants inside the CdS matrix were directly observed using Cs-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images and quantitatively confirmed using the inductively coupled plasma atomic emission spectroscopy (ICP-AES) data. With a photoluminescence quantum yield (PLQY) of 37.5%, the as-prepared (Au12)@CdS QDs emitted light at 635 nm. Due to the injection of excited electrons from the lowest unoccupied molecular orbital (LUMO) of dopants to the conduction band (CB) of CdS, multiple fine peaks were observed in the photoluminescence excitation (PLE) spectra. By using clusters as starting materials, we demonstrate a universal approach for the precise tailoring of dopants and provide a pathway for band energy engineering of doped QDs.

Journal Title

Chemical Communications

Conference Title
Book Title
Edition
Volume
Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note

This publication has been entered in Griffith Research Online as an advanced online version.

Access the data
Related item(s)
Subject

Chemical sciences

Macromolecular and materials chemistry

Science & Technology

Physical Sciences

Chemistry, Multidisciplinary

Chemistry

COLLOIDAL NANOCRYSTALS

Persistent link to this record
Citation

Yu, J; Zhang, H; Xu, W; Liu, G; Tang, Y; Zhao, D, Quantized doping of CdS quantum dots with twelve gold atoms, Chemical Communications, 2021

Collections