| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | E. 환경/센서 재료 분과 |
| 제목 | Highly Porous 3D Hybird Nanomaterials for Surface-Enhanced Raman Scattering (SERS)-based NO2 Sensor. |
| 초록 | Since surface-enhanced Raman scattering (SERS) technique was discovered in the 1970s [1], number of researchers have been focusing on fabricating high areal density of plasmonic nanostructures with nanoscale gaps (so called hot spots) to develop highly sensitive SERS-based chemical and biological sensors [2]. In this study, we have developed SERS-based gas sensors, combining a portable Raman spectrometer and 3D porous SERS substrates. The 3D hybrid Ag nanostructures were fabricated through a simple two-step sequence involving the 3D stacking of the Ag nanowires (NWs) and the in situ evaporation of the alumina and Ag nanoparticle (NP) layers onto the 3D-stacked Ag NWs [3]. That exhibited dual plasmonic coupling not only between the NPs and the NWs, but also between the NPs and the NWs. Real time NO2 detection was achieved by combining 3D hybrid SERS substrates with a portable Raman spectrometer. We also achieved a highly sensitive NO2 detection with a limit of detection of approximately 0.3 ppm, and showed a linear calibration curve based on the NO2 concentration, ranged from 3 to 0.3 ppm. Finally, our SERS-based detection system may be extended into on-site/in-situ volatile organic compound sensors for the early detection of lung cancer. Reference [1] M Fleischmann, P. J. Hendra and A. J. Mcquillan. Chem. Phys. Lett, Vol 26, 1974, 5, 163-166 [2] Lucas A. Lane, Ximei Qian, and Shuming Nie, Chem. Rev., 2015, 155(19), 10489-10529. [3] S.G. Park, C. Mun, M. Lee, T.Y. Jeon, H.S. Shim, Y.J. Lee, J.D. Kwon, C.S. Kim, D.H. Kim, Adv. Mater. 27, 4290 (2015) |
| 저자 | 김선호, 김동호, 박성규, 문채원 |
| 소속 | 재료(연) |
| 키워드 | sers; NO<SUB>2</SUB> detection; chemical sensor; Ag nanowire |
