Published in
Royal Society of Chemistry, Chemical Communications, 28(50), p. 3695
DOI: 10.1039/c3cc49325c
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Positively charged graphene oxide nanoparticle: Precisely label the plasma membrane of live cell and sensitively monitor extracellular pH in situ
Journal article published in 2014 by
Huarui Zhu,
Liang Gao,
Xinglu Jiang,
Ru Liu,
Yueteng Wei,
Yaling Wang 
,
Yuliang Zhao,
Zhifang Chai,
Xueyun Gao
,
Yuliang Zhao,
Zhifang Chai,
Xueyun Gao
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Abstract
Polyethylene glycol modified graphene oxide (GO-PEG) nanoparticles were prepared, which were positively charged and fairly stable in buffer solution. The GO-PEG nanoparticles possess a special affinity to the plasma membrane of live cells, and their yellowish-green fluorescence is sensitively responsive to the extracellular physiological solution in situ.