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Optical and Quantum Electronics

Erschienen in:

01.07.2018

4-Methoxyphenyl grafted onto graphene quantum dots surface via diazonium chemistry method

verfasst von: Peihui Luo, Xiangfeng Guan, Yunlong Yu, Xiaoyan Li

Erschienen in: Optical and Quantum Electronics | Ausgabe 7/2018

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Abstract

Chemical modifacation is effective method to change surface state of graphene quantum dots (GQDs). GQDs modified with various functional groups exhibit multicolor photoluminescence (PL). Here, 4-methoxyphenyl (MP) group, with electron donating methoxy as substituent on aromatic ring, was grafted onto GQDs surface via a diazonium chemistry method. After modification, the average diameter of GQDs was decreased from 3.3 to 2.5 nm, and their PL was blue-shifted 40 nm relative to raw GQDs (R-GQDs). The result is similar to that of GQDs modified with phenyl (P), 4-carboxyphenyl (CP), 5-sulfonaphthyl (SN) and 4-sulfophenyl (SP), which are aryl groups without substituent and with electron withdrawing substituent, previously. Therefore, properties of substituent groups located at aryl do not obviously change PL behavior of aryl-modified GQDs.

Vorheriger Artikel Nonlinear optical response of graphene/silicon nanocomposites

Nächster Artikel Solitons resonant behavior for a waveguide directional coupler system in optical fibers

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Titel: 4-Methoxyphenyl grafted onto graphene quantum dots surface via diazonium chemistry method
verfasst von: Peihui Luo
Xiangfeng Guan
Yunlong Yu
Xiaoyan Li
Publikationsdatum: 01.07.2018
Verlag: Springer US
Erschienen in: Optical and Quantum Electronics / Ausgabe 7/2018
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-018-1544-7

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