Quasi-molecular fluorescence from graphene oxide.

Scientific Reports
Charudatta GalandePulickel M Ajayan

Abstract

Aqueous dispersions of graphene oxide (GO) have been found to emit a structured, strongly pH-dependent visible fluorescence. Based on experimental results and model computations, this is proposed to arise from quasi-molecular fluorophores, similar to polycyclic aromatic compounds, formed by the electronic coupling of carboxylic acid groups with nearby carbon atoms of graphene. Sharp and structured emission and excitation features resembling the spectra of molecular fluorophores are present near 500 nm in basic conditions. The GO emission reversibly broadens and red-shifts to ca. 680 nm in acidic conditions, while the excitation spectra remain very similar in shape and position, consistent with excited state protonation of the emitting species in acidic media. The sharp and structured emission and excitation features suggest that the effective fluorophore size in the GO samples is remarkably well defined.

References

Feb 15, 1987·Physical Review. B, Condensed Matter·J Robertson, E P O'Reilly
Oct 23, 2004·Science·K S NovoselovA A Firsov
Mar 3, 2007·Nature Materials·A K Geim, K S Novoselov
Sep 12, 2007·Journal of Fluorescence·Nathaniel V NucciJane M Vanderkooi
Jun 4, 2008·Physical Review Letters·Xinran WangHongjie Dai
Apr 17, 2009·Nature·Liying JiaoHongjie Dai
Jul 8, 2009·Nature Nanotechnology·Aditya D MohiteBruce W Alphenaar
Nov 21, 2009·ACS Nano·T GokusA Hartschuh
Dec 22, 2009·Chemical Society Reviews·Daniel R DreyerRodney S Ruoff
Jan 1, 2008·Nano Research·Xiaoming SunHongjie Dai
Mar 11, 2010·Advanced Materials·Goki EdaManish Chhowalla
Apr 7, 2010·Physical Review Letters·Melinda Y HanPhilip Kim
Jun 24, 2010·Nature Chemistry·Akbar BagriVivek B Shenoy
Jun 26, 2010·Nano Letters·Mallory L MuellerLiang-shi Li
Aug 1, 2009·Nature Chemistry·Wei GaoPulickel M Ajayan

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Citations

Jun 27, 2014·Physical Chemistry Chemical Physics : PCCP·Mariia O DekaliukAlexander P Demchenko
Apr 9, 2015·Nanoscale Research Letters·Tianju FanArthur J Epstein
May 19, 2016·The Journal of Physical Chemistry Letters·Te-Fu YehHsisheng Teng
Aug 16, 2016·Journal of the American Chemical Society·Anton NaumovSiegfried Eigler
Oct 27, 2016·Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology·Brian D HoltStefanie A Sydlik
Jan 18, 2017·ACS Applied Materials & Interfaces·Pawan Kumar SrivastavaSubhasis Ghosh
May 17, 2017·The Journal of Physical Chemistry Letters·Yutaka MatsunoMasahito Sano
May 7, 2016·Macromolecular Bioscience·Shiqi WangRongjun Chen
Nov 13, 2012·Scientific Reports·Jingzhi ShangGagik G Gurzadyan
Mar 2, 2018·Physical Chemistry Chemical Physics : PCCP·Sefika OzcanTamer Uyar
Nov 15, 2017·Sensors·Erica CiottaRoberto Pizzoferrato
Mar 16, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Vadim V NeklyudovAryat M Dimiev
Jan 15, 2016·Physical Chemistry Chemical Physics : PCCP·Laizhi SuiMingxing Jin
May 9, 2012·Nature Materials·Suenne KimElisa Riedo
Dec 8, 2016·Advanced Healthcare Materials·Brian D HoltStefanie A Sydlik
Oct 24, 2018·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Poojan Milan GharatSharmistha Dutta Choudhury
Aug 12, 2013·Methods and Applications in Fluorescence·Alexander P Demchenko, Mariia O Dekaliuk
Dec 15, 2015·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Shengliang Hu
Aug 21, 2020·Nanoscale Research Letters·Juan HaoBingrong Gao
Jul 27, 2012·Advanced Materials·Hiroyuki TetsukaAtsuto Okamoto
Jul 26, 2017·Chemistry, an Asian Journal·Peng Zheng, Nianqiang Wu
Sep 21, 2013·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M F CraciunS Russo
Aug 6, 2019·Advanced Science·Qingsong MeiZhongping Zhang
Aug 14, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Lu SunZhe Liu
Oct 20, 2012·Physical Chemistry Chemical Physics : PCCP·Qinghua LiangXinmin Yang
Nov 2, 2012·The Analyst·Mei YangYixiang Duan

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Methods Mentioned

BETA
fluorescence spectroscopy
electron diffraction

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