Journal
CARBON
Volume 167, Issue -, Pages 196-201Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.06.003
Keywords
Dual-functional nanosensors; Carbyne nanocrystals; Fluorescent probe; Colorimetric probe; Metal ions
Funding
- National Natural Science Foundation of China [51832011]
- State Key Laboratory of Optoelectronic Materials and Technologies
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Dual-functional nanosensors for fluorescent and colorimetric detection of metal ions are generally shown in organic materials or complex organic-inorganic hybrid structures, and there are much few reports about dual-functional sensors made of pure and simple inorganic nanomaterials. Here, we report a fluorescent and colorimetric probe of the hybrid gold-carbyne nanocrystals structure for selective and sensitive detection of ferrous ions. We fabricate fluorescent carbyne nanocrystals (inorganic nano crystals) capped with gold nanoparticles (CNCs@AuNPs) via a convenient one-step laser ablation in liquids. We demonstrate that, with involvement of ferrous ions, CNCs@AuNPs show fluorescence quenching and color-producing properties, which make them be a double-channel platform for chemical and biomedical detection. With remarkably high selectivity towards ferrous ions over other metals, the fluorescent and colorimetric methods of the fabricated probe exhibit a detection limit of 14 mu M and 1.2 mu M, respectively. We also establish that the electron transferring plays an important role in facilitating these novel effects. These findings expand the applications of inorganic nanomaterials in chemical and biomedical sensing. (C) 2020 Elsevier Ltd. All rights reserved.
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