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Cobalt Phosphide Nanowires: Efficient Nanostructures for Fluorescence Sensing of Biomolecules and Photocatalytic Evolution of Dihydrogen from Water under Visible Light
Author(s) -
Tian Jingqi,
Cheng Ningyan,
Liu Qian,
Xing Wei,
Sun Xuping
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201501237
Subject(s) - aptamer , photocatalysis , fluorescence , quenching (fluorescence) , materials science , biomolecule , photochemistry , visible spectrum , cobalt , photoinduced electron transfer , oligonucleotide , water splitting , nanotechnology , biosensor , dna , chemistry , electron transfer , optoelectronics , catalysis , physics , biochemistry , genetics , metallurgy , biology , quantum mechanics
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 p M 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.