Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 248, Issue -, Pages 214-222Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.03.129
Keywords
Dendritic nanoflowers; Bimetallic alloy; 3-Aminopyrazine-2-carboxylic acid; Surface-enhanced Raman scattering; 4-Nitrothiophenolate
Funding
- National Natural Science Foundation of China [21475118, 21275130]
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With the purpose to search novel surface-enhanced Raman scattering (SERS) substrates, uniform multi-branched AgPt alloyed dendritic nanoflowers (AgPt DNFs) are fabricated with the assistance of 3-aminopyrazine-2-carboxylic acid (Apzc) as a structure-director via a one-pot successive aqueous co reduction strategy. The formation mechanism of AgPt DNFs is investigated in details. Their morphology, structure, size, and composition are confirmed by a series of characterization technique. The hierarchical nanostructures exhibit strong SERS enhancement and excellent stability by using 4-nitrothiophenolate (4-NTP) as a typical Raman probe. The improved SERS performance for 4-NTP is mainly attributed to the synergistic effects between the bimetals, together with the enriched hot spots at the sharp corners and/or edges of the architectures. This synthetic strategy provided a facile and environment-friendly method to prepare other metallic architectures with novel properties. (C) 2017 Elsevier B.V. All rights reserved.
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