Plasmonic Properties of Gold Nanoparticles Separated from a Gold Mirror by an Ultrathin Oxide
文献类型：期刊论文
| 作者 | Mubeen, S ; Zhang, SP ; Kim, N ; Lee, S ; Kramer, S ; Xu, HX ; Moskovits, M |
| 刊名 | NANO LETTERS
 |
| 出版日期 | 2012 |
| 卷号 | 12期号:4页码:2088 |
| 关键词 | ENHANCED RAMAN-SCATTERING ATOMIC LAYER DEPOSITION AU NANOPARTICLES REFRACTIVE-INDEX SINGLE-MOLECULE SURFACE SPECTROSCOPY FILM SERS SILVER |
| ISSN号 | 1530-6984 |
| 通讯作者 | Moskovits, M (reprint author), Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA. |
| 中文摘要 | That a nanoparticle (NP) (for example of gold) residing above a gold mirror it almost as effective a surface enhanced Raman scattering (SEAS) substrate (when illuminated with light of the correct polarization and wavelength) as two closely coupled gold nanoparticles has been known for some time.(1,2) The NP-overmirror (NPOM) configuration has the valuable advantage that it is amenable to top-down fabrication. We have fabricated a series of Au-NPOM substrates with varying but thin atomic layer-deposited oxide spacer and measured the SERS enhancement as a Function of spacer thickness and angle of incidence (AOI). These were compared with high-quality finite-difference time-domain calculations, which reproduce the observed spacer thickness and AOI dependences faithfully. The SERS intensity is expected to be strongly affected by the AOI on account for the fact that the hot spot formed in the space between the NP and the mirror is most efficiently excited with an electromagnetic field component that is normal to the surface of the mirror. Intriguingly we find that the SERS intensity maximizes at similar to 60 degrees and show that this is due to the coherent superposition of the incident and the reflected field components.(3) The observed SEAS intensity is also shown to be very sensitive to the dielectric constant of the oxide spacer layer with the most intense signals obtained when using a low dielectric constant oxide layer (SiO2). |
| 收录类别 | SCI |
| 资助信息 | Institute for Energy Efficiency, an Energy Frontier Research Center; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001009]; Institute for Collaborative Biotechnologies through U.S. Army Research Office [DAAD19-03-D-0004]; National Science Foundation [DMR-0080034, DMR-0216466] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51062]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Mubeen, S,Zhang, SP,Kim, N,et al. Plasmonic Properties of Gold Nanoparticles Separated from a Gold Mirror by an Ultrathin Oxide[J]. NANO LETTERS,2012,12(4):2088. |
| APA | Mubeen, S.,Zhang, SP.,Kim, N.,Lee, S.,Kramer, S.,...&Moskovits, M.(2012).Plasmonic Properties of Gold Nanoparticles Separated from a Gold Mirror by an Ultrathin Oxide.NANO LETTERS,12(4),2088. |
| MLA | Mubeen, S,et al."Plasmonic Properties of Gold Nanoparticles Separated from a Gold Mirror by an Ultrathin Oxide".NANO LETTERS 12.4(2012):2088. |
入库方式： OAI收割
来源：物理研究所
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