期刊
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
卷 38, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.202100170
关键词
0D nanomaterials; carbon quantum dots; fluorescent inks; heteroatom doping; photocatalysis; photoluminescence mechanism; sensors
资金
- CHRIST (Deemed to be University) [MNGDSC-1806]
- CHRIST (Deemed to be University)
This review discusses the impact of chemical and physical modifications on the photophysical properties of CQDs, such as photoluminescence, absorbance, and relaxivity. It also outlines the recent advancements and future prospects of optical and catalytic applications of CQDs enhanced through modifications of their structure and composition.
Carbon quantum dots (CQDs) are a unique class of 0D nanomaterials, featured by a graphitic core and shell layers saturated with hydrogen atoms and functional groups. CQDs are prepared through top-down and bottom-up strategies from natural and synthetic precursors. CQDs can be modified through chemical (e.g., surface functionalization/passivation, doping, etc.) and physical (e.g., core-shell architecture, composite material blending, etc.) strategies to control their properties. This review highlights the effect of such modifications on the photophysical properties of CQDs, such as photoluminescence (PL), absorbance, and relaxivity. The dependence of PL upon the size, orientation at the edges, surface and edge functionalization, doping, excitation wavelength, concentration, pH, aggregate formation, etc., are summarized along with the supporting theoretical evidence available in the literature. Also, this review outlines the recent advancements, and future prospective of optical (e.g., sensing, bioimaging, and fluorescent ink) and catalytic applications (e.g., photocatalysis and electrocatalysis) of CQDs enhanced through physical and chemical modifications of their structure and composition.
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