title: Cobalt phosphide nanowires: efficient nanostructures for fluorescence sensing of biomolecules and photocatalytic evolution of dihydrogen from water under visible light.
abstract: The detection of specific DNA sequences plays an important role in the identification of disease-causing pathogens and genetic diseases, and photochemical water splitting offers a promising avenue to sustainable, environmentally friendly hydrogen production. Cobalt-phosphorus nanowires (CoP NWs) show a high fluorescence quenching ability and different affinity toward single- versus double-stranded DNA. Based on this result, the utilization of CoP NWs as fluorescent DNA nanosensors with a detection limit of 100 pM and a selectivity down to single-base mismatch was demonstrated. The use of a thrombin-specific DNA aptamer also enabled the selective detection of thrombin. The photoinduced electron transfer from the excited dye that labels the oligonucleotide probe to the CoP semiconductor led to efficient fluorescence quenching, and largely enhanced the photocatalytic evolution of hydrogen from water under visible light.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin (China); University of the Chinese Academy of Sciences, Beijing 100049 (China).
authors.forename: Jingqi
authors.initials: J
authors.lastname: Tian
authors.forename: Ningyan
authors.initials: N
authors.lastname: Cheng
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Xing
authors.forename: Xuping
authors.initials: X
authors.lastname: Sun
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D008027:Light; D064347:Microscopy, Electrochemical, Scanning; D053770:Nanowires / Q000737:chemistry*; D017553:Phosphorus Compounds / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D017553:Phosphorus Compounds; D014867:Water; D003035:Cobalt; D006859:Hydrogen; D004247:DNA
keywords: CoP nanowires; biomolecules; fluorescence sensing; hydrogen evolution; photocatalysis