Gold-rich ligament nanostructure by dealloying Au-based metallic glass ribbon for surface-enhanced Raman scattering
| Autor: | Hsin-Chia Ho, Chun-Hway Hsueh, Yi Xu, Chan Hung Shek, Yi-Chen Lai, P. Yiu, Bo-Kai Chao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Nanostructure
Materials science Science 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences Article symbols.namesake Ribbon Multidisciplinary Amorphous metal Scattering business.industry Orders of magnitude (numbers) 021001 nanoscience & nanotechnology 0104 chemical sciences Reflection (mathematics) symbols Optoelectronics Medicine 0210 nano-technology business Raman scattering |
| Zdroj: | Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | A new method to fabricate an Au-rich interconnected ligament substrate by dealloying the Au-based metallic glass ribbon for surface-enhanced Raman scattering (SERS) applications was investigated in this study. Specifically, three substrates, Au film, Au-based metallic glass ribbon, and dealloyed Au-based metallic glass ribbon, were studied. The dealloyed surface showed ligament nanostructure with protruding micro-islands. Based on the field emission scanning electron microscopy, reflection and scattering measurements, the dealloyed Au-based metallic glass provided a large surface area, multiple reflections, and numerous fine interstices to produce hot spots for SERS enhancements. The SERS signal of analyte, p-aminothiophenol, in the micro-island region of dealloyed Au-based metallic glass was about 2 orders of magnitude larger than the flat Au film. Our work provides a new method to fabricate the inexpensive and high SERS enhancements substrates. |
| Databáze: | OpenAIRE |
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