| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_정밀화학 |
| 제목 |
The Nanogap Control of Gold-Silver Alloys on Silica Nanoparticles for Highly Sensitive SERS-based Probes |
| 초록 |
Highly sensitive surface-enhanced Raman scattering (SERS) probes were developed based on the growth of Ag onto Au nanoparticles (NPs) on the surface of silica NPs (SiO2@Au@Ag). We used ascorbic acid as a reducing agent for Ag ions and polyvinylpyrrolidone (PVP) as a structure-directing agent. By adjusting the concentration of AgNO3, the nanogaps between two Ag NPs on the surface of the SiO2@Au@Ag were tuned. Originating from a highly enhanced E-field at the nanogaps (＜1 nm) between two Ag NPs of the SiO2@Au@Ag NPs, strong Raman signals were obtained. The proposed NPs exhibited low limit of detection (LOD) of 2.4 nM for 4-amino-benzophenol and showed a high reproducibility in deviation of 14.2 %. |
| 저자 |
김윤희, 함은일, 조아라, 안재현, 성보미, 전봉현
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| 소속 |
건국대 |
| 키워드 |
Nanogap; Au-Ag alloy; Surface-enhanced Raman scattering (SERS)
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| E-Mail |
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