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Photoluminescence‐Tunable Carbon Nanodots: Surface‐State Energy‐Gap Tuning
Author(s) -
Bao Lei,
Liu Cui,
Zhang ZhiLing,
Pang DaiWen
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201405070
Subject(s) - photoluminescence , nanodot , materials science , surface states , band gap , nanotechnology , surface (topology) , carbon fibers , optoelectronics , surface energy , composite material , geometry , mathematics , composite number
The photoluminescence of carbon nanodots (C‐dots) can be tuned by changing their surface chemistry or size because the photoluminescence is a function of the surface‐state electronic transitions. Increasing the degree of surface oxidation leads to a narrowing of the energy gap of the surface; meanwhile, larger C‐dots with an extensive π‐electron system, which can couple with surface electronic states, can also lead to a narrowing of the energy gap of the surface states.
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