Diamond quantum dots: Room-temperature synthesis, concurrent multiband luminescence, and origins of surface defects

Diamond quantum dots (diamond QDs) have attracted great interest on account of their excellent physical and chemical properties. Here, we synthesized the diamond QDs 2–8 nm in diameter through alkaline assisted oxidation at room temperature. This composite method fairly original, simple, low-cost, a...

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Published in:Physica. B, Condensed matter Condensed matter, 2021-06, Vol.610, p.412781, Article 412781
Main Authors: Zhang, Wenxia, Wang, Zhen, Wang, Yuchan, Yuan, Suzhen, Zhang, Li, Qi, Fei
Format: Article
Language:English
Subjects:
Chemical properties
Chemical synthesis
Concurrent multiband luminescence
Diamond quantum dots
Diamonds
Fluorescence
Fourier transforms
Luminescence
Nanocrystals
Oxidation
Photoluminescence
Quantum dots
Room temperature
Room-temperature synthesis
Surface defects
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Wang, Zhen
Wang, Yuchan
Yuan, Suzhen
Zhang, Li
Qi, Fei
description Diamond quantum dots (diamond QDs) have attracted great interest on account of their excellent physical and chemical properties. Here, we synthesized the diamond QDs 2–8 nm in diameter through alkaline assisted oxidation at room temperature. This composite method fairly original, simple, low-cost, and eco-friendly. High-resolution TEM, XRD and XPS confirm the diamond structure of the synthesized nanocrystals. The diamond QDs exhibit concurrent multiband luminescence across the whole visible region. The study based on the photoluminescence, UV–Vis absorption, and Fourier-transform infrared reveals that the fluorescence emission originates from the C–O–C and C(O)O related surface defects.
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subjects Chemical properties
Chemical synthesis
Concurrent multiband luminescence
Diamond quantum dots
Diamonds
Fluorescence
Fourier transforms
Luminescence
Nanocrystals
Oxidation
Photoluminescence
Quantum dots
Room temperature
Room-temperature synthesis
Surface defects
title Diamond quantum dots: Room-temperature synthesis, concurrent multiband luminescence, and origins of surface defects
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