Plasmon-Mediated Surface Engineering of Silver Nanowires for Surface-Enhanced Raman Scattering,The Journal of Physical Chemistry Letters

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Plasmon-Mediated Surface Engineering of Silver Nanowires for Surface-Enhanced Raman Scattering
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-06-06 00:00:00 , DOI: 10.1021/acs.jpclett.7b00958
Gang Lu _{1,

2} , Haifeng Yuan ₂ , Liang Su ₂ , Bart Kenens ₂ , Yasuhiko Fujita ₂ , Maha Chamtouri ₂ , Maria Pszona ₃ , Eduard Fron ₂ , Jacek Waluk ₃ , Johan Hofkens _{2,

4} , Hiroshi Uji-i _{2,

4}

Affiliation

We reveal nanoscale morphological changes on the surface of a silver nanowire (AgNW) in the conventional surface-enhanced Raman scattering (SERS) measurement condition. The surface morphology changes are due to the surface plasmon-mediated photochemical etching of silver in the presence of certain Raman probes, resulting in a dramatic increase of Raman scattering intensity. This observation indicates that the measured SERS enhancement does not always originate from the as-designed/fabricated structures themselves, but sometimes with contribution from the morphological changes by plasmon-mediated photochemical reactions. Our work provides a guideline for more reliable SERS measurements and demonstrates a novel method for simple and site-specific engineering of SERS substrate and AgNW probes for designing and fabricating new SERS systems, stable and efficient TERS mapping, and single-cell SERS endoscopy.

中文翻译：

银纳米线的等离子介体表面工程用于表面增强拉曼散射

我们揭示了在常规的表面增强拉曼散射（SERS）测量条件下，银纳米线（AgNW）表面的纳米级形态变化。表面形态的变化是由于在某些拉曼探针的存在下银的表面等离子激元介导的光化学蚀刻，导致拉曼散射强度的急剧增加。该观察表明，测得的SERS增强并非总是源自设计/制造的结构本身，而是有时归因于等离子体激元介导的光化学反应引起的形态变化。我们的工作为更可靠的SERS测量提供了指南，并演示了一种简单且针对特定地点的SERS基底和AgNW探针工程设计和制造新SERS系统的新颖方法，

更新日期：2017-06-28

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