| 학회 |
한국공업화학회 |
| 학술대회 |
2016년 가을 (10/26 ~ 10/28, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
20권 2호 |
| 발표분야 |
생체재료_포스터 |
| 제목 |
Size effect of metal on silver-coated gold nanoparticle-introduced SiO2 nanostructures |
| 초록 |
Silver (Ag)-coated gold (Au) nanoparticle (NP)-embedded silica nanostructures (SiO2@Au@Ag NSs) were prepared using three different Au NPs (2.5, 7 and 15 nm diameter) to study their optical properties. The UV-vis spectra of the SiO2@Au@Ag NSs prepared from 2.5 nm Au NPs exhibited a longitudinal spectrum at 50 μM of silver nitrate (AgNO3) with the maximum peak at 410 nm. However, it was red-shifted to 430 nm and the wavelength was broadened from 400 to 800 nm when the AgNO3 concentration was increased from 50 to 300 μM. This absorption rise was effected by the formation and growth of the Ag shell on the Au NPs on the surface of SiO2 NSs. Hence, the SiO2@Au@Ag NSs prepared from 7 nm Au NPs was broadened from 400 to 800 nm. The surface-enhanced Raman scattering (SERS) intensity boosted with increasing size of the Au NPs used to prepare SiO2@Au@Ag NSs. In contrast, the reproducibility of the SERS intensity of the SiO2@Au@Ag NSs was higher when 2.5 nm Au NPs were used. |
| 저자 |
심성보1, 김형모1, Xuan-Hung Pham1, 함은일1, 김태한1, 이윤식2, 전봉현1
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| 소속 |
1건국대, 2서울대 |
| 키워드 |
Gold nanoparticle; Silica nanoparticle; SERS; surface-enhanced Raman scattering
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| E-Mail |
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