Open AccessPreparation and Characterization of Water-soluble ZnSe: Fe/ZnSe Quantum Dots
Author(s) -
Meijing Huang,
Chunhong Qiu,
Fenghua Huang
Publication year - 2019
Publication title -
iop conference series earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1315
pISSN - 1755-1307
DOI - 10.1088/1755-1315/310/4/042050
Subject(s) - photoluminescence , quantum dot , transmission electron microscopy , zinc selenide , materials science , ultraviolet , absorption edge , aqueous solution , infrared , crystal (programming language) , blueshift , zinc , absorption spectroscopy , analytical chemistry (journal) , chemistry , photochemistry , optoelectronics , nanotechnology , band gap , optics , metallurgy , programming language , chromatography , computer science , physics
Water-soluble Fe-doped ZnSe/ZnSe quantum dots (ZnSe: Fe/ZnSe QDs) were prepared through a facile, low-cost and effective strategy in aqueous solution using L-cysteine ( L-cys) as modifier. X-ray diffraction (XRD) studies showed that the prepared ZnSe: Fe/ZnSe QDs belonged to zinc blende crystal structures. Transmission electron microscopy (TEM) exhibited that the average diameter of ZnSe: Fe/ZnSe QDs was about 2.9 nm. Infrared spectrum (IR) exhibited that the L-cys has been successfully modified to QDs. The tests of Ultraviolet-visible (UV-vis) spectrum exhibited that the absorption edge position of ZnSe: Fe/ZnSe QDs had a sight red shift with the deposition of ZnSe shell. The fluorescence properties of obtained ZnSe: Fe/ZnSe QDs were investigated through photoluminescence (PL) spectrum. The results exhibited that the PL intensity of ZnSe: Fe/ZnSe QDs has been improved obviously compared with ZnSe: Fe QDs.
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