Highly Sensitive, Uniform, and Reproducible Surface-Enhanced Raman Spectroscopy Substrate with Nanometer-Scale Quasi-periodic Nanostructures
| Autor: | Shoushan Fan, Jiaping Wang, Chen Mo, Wang Ying-Cheng, Xiaoyang Xiao, Qunqing Li, Yuanhao Jin, Tianfu Zhang, Kaili Jiang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Fabrication Nanostructure Nanotechnology 02 engineering and technology Substrate (electronics) Carbon nanotube Surface-enhanced Raman spectroscopy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention symbols.namesake law Etching (microfabrication) symbols General Materials Science Wafer 0210 nano-technology Raman spectroscopy |
| Zdroj: | ACS applied materialsinterfaces. 9(37) |
| ISSN: | 1944-8252 |
| Popis: | We introduce a simple and cost-effective approach for fabrication of effective surface-enhanced Raman spectroscopy (SERS) substrates. It is shown that the as-fabricated substrates show excellent SERS effects in various probe molecules with high sensitivity, that is, picomolar level detection, and also good reliability. With a SERS enhancement factor beyond 108 and excellent reproducibility (deviation less than 5%) of signal intensity, the fabrication of the SERS substrate is realized on a four-inch wafer and proven to be effective in pesticide residue detection. The SERS substrate is realized first through the fabrication of quasi-periodic nanostructured silicon with dimension features in tens of nanometers using superaligned carbon nanotubes networks as an etching mask, after which a large amount of hot spots with nanometer gaps are formed through deposition of a gold film. With rigorous nanostructure design, the enhanced performance of electromagnetic field distribution for nanostructures is optimized. ... |
| Databáze: | OpenAIRE |
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