Effect of surface tension on self-termination in Au tip fabrication for tip-enhanced Raman spectroscopy
| Autor: | Yuji Kuwahara, Pawel Krukowski, Takeshi Yano, Songpol Chaunchaiyakul |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Reproducibility
Aqueous solution Fabrication Chemistry technology industry and agriculture General Engineering Analytical chemistry General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Tip-enhanced Raman spectroscopy 01 natural sciences Signal enhancement Surface tension symbols.namesake Etching (microfabrication) 0103 physical sciences symbols 010306 general physics 0210 nano-technology Raman spectroscopy |
| Zdroj: | Japanese Journal of Applied Physics. 55:098003 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.7567/jjap.55.098003 |
| Popis: | The effect of surface tension on the fabrication of Au tips was investigated. When using a 12 M HCl aqueous solution, the etching process did not consistently self-terminate after the lower part of the wire dropped, resulting in the poor reproducibility of the tip sharpness. However, using an ethanolic solution of 12 mol/l HCl, a self-terminating etching process was always observed, resulting in the improved reproducibility of sharp tips. We attribute this to the reduced surface compared to that of aqueous HCl. The obtained tips were used in tip-enhanced Raman spectroscopy experiments, in which significant signal enhancement was observed. |
| Databáze: | OpenAIRE |
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