| 학회 | 한국재료학회 |
| 학술대회 | 2015년 봄 (05/14 ~ 05/15, 구미코) |
| 권호 | 21권 1호 |
| 발표분야 | E. 환경/센서 재료 |
| 제목 | Development of droplet-based SERS measurement system on superhydrophobic guiding track |
| 초록 | A research in the field of surface enhanced Raman (SERS) has grown dramatically due to its powerful analytic performance for the biological, and chemical detection. Because SERS is based on localized surface plasmon resonance (LSPS), metallic nanostructures are conventionally used to fabricate SERS-active substrate using various physical and chemical methods such as electron beam lithography, reactive ion etching, electrodeposition, and electroless deposition. Recently, the devices combined with SERS and microfluidic system have been interested as a one of keys to widen application of SERS for in-situ monitoring of chemical reactions and analytes detection. However, in-situ SERS measurement in microfluidic systems has limitations due to the destruction or contamination of metallic nanostructures in the fluid channel by fluidic force. On the other hand, droplet-based analytes can be easily roll-off on water-repellent superhydrophobic surfaces without surface contamination due to extremely low adhesion force. In this research, we demonstrate a novel droplet-based open-channel SERS measurement system on superhydrophobic guiding track. SERS-active silver dendritic structures were fabricated on a copper plate with a shallow groove via galvanic replacement reaction, and then, extreme water-repellent properties were achieved through self-assembled monolayer coating. Droplet can be easily controlled along the pre-defined groove on the SERS-active superhydrophobic surface. By using this system, successive SERS measurements were achieved on the same laser spot using Rhodamine 6G droplet without any contamination. |
| 저자 | 신세라, 이재홍, 서정목, 김다영, 이상근, 이순일, 이태윤 |
| 소속 | 연세대 |
| 키워드 | <P>superhydrophobic; silver dendrite; galvanic replacement reaction; surface-enhanced Raman scattering</P> |
