title: A novel graphene oxide-based fluorescent nanosensor for selective detection of Fe(3+) with a wide linear concentration and its application in logic gate.
abstract: A graphene oxide-based fluorescent nanosensor AGO has been designed and synthesized by covalent grafting allylamine onto GO surface. In aqueous media, AGO displays a highly selective and sensitive discrimination of Fe(3+) from Fe(2+) and other metal ions through electron transfer-induced fluorescence quenching. The quenching of AGO fluorescence is linearly proportional to Fe(3+) concentration in a wide range of 0-120 μM (correlation coefficient R(2)=0.9994). Moreover, AGO can be used to construct a combinational three-input logic gate to discriminate Fe(3+) and Fe(2+). The logic gate works well in intracellular fluorescence imaging, which shows a potential as a promising platform for biosensing analysis.
authors: Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P.R. China. Electronic address: lhedlut2002@hotmail.com.
authors: Liang
authors: L
authors: He
authors: Shenzhen Key Laboratory of Translational Medicine of Tumor, Health Science Center, Shenzhen University, Shenzhen 518060, P.R. China.
authors: Jianna
authors: J
authors: Li
authors: Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P.R. China. Electronic address: tcxinjh@polyu.edu.hk.
authors: John H
authors: JH
authors: Xin
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D039301:Computers, Molecular; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D007501:Iron / Q000032:analysis*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation; D010087:Oxides / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*
chemical_list: D010087:Oxides; D006108:Graphite; D007501:Iron
keywords: Cell imaging; Electron buffer; Graphene oxide; Logic gate; Nanosensor