Journal
OPTICS EXPRESS
Volume 25, Issue 7, Pages 7408-7417Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.007408
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Funding
- National Natural Science Foundation of China [11575102, 11105085]
- Fundamental Research Funds of Shandong University [2015JC007]
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The project of wielding laser light as a versatile tool for sculpting branched Ag@Au bimetallic nanocrystals with mean size of similar to 50 nm has been developed in this work. The moderate overgrowth of Ag species with negligible damage effect on the branched Ag@Au nanostructures was achieved by laser-induced photo-oxidation. The final Ag@Au nanodendrites exhibit superior surface enhanced Raman scattering (SERS) activities with an enhancement factor up to similar to 10(11) and a detection limit as low as similar to 10(-14) M. The pronounced feature should be attributed to the noticeable small-sized branches (<10 nm) and unique pronounced inter- metallic synergies. Our results have a promising potential for developing SERS- based ultrasensitive probes in biomedical application. (C) 2017 Optical Society of America
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