Synthesis and Single-Particle Surface-Enhanced Raman Scattering Study of Plasmonic Tripod Nanoframes with Y-Shaped Hot-Zones
- 주제(키워드) Nanoframe , Tripod , Hot-spot , Single-particle SERS , Nanogap
- 주제(기타) Chemistry, Multidisciplinary
- 주제(기타) Chemistry, Physical
- 주제(기타) Nanoscience & Nanotechnology
- 주제(기타) Materials Science, Multidisciplinary
- 주제(기타) Physics, Applied
- 주제(기타) Physics, Condensed Matter
- 설명문(일반) [Kim, Jeongwon; Yoo, Sungjae; Kim, Jae-Myoung; Kim, Juri; Park, Sungho] Sungkyunkwan Univ, Dept Chem, Suwon 16419, South Korea; [Choi, Sungwoo; Park, Doojae] Hallym Univ, Dept Appl Opt & Phys, Chunchon 24252, South Korea; [Park, So-Jung] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea; [Nam, Jwa-Min] Seoul Natl Univ, Dept Chem, Seoul 08826, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000169547
- 본문언어 영어
- Published As https://dx.doi.org/10.1021/acs.nanolett.0c01084
- PubMed https://pubmed.ncbi.nlm.nih.gov/32364741
초록/요약
Herein, plasmonic metal tripod nanoframes with threefold symmetry were synthesized in a high yield (similar to 83%), and their electric field distribution and single-particle surface-enhanced Raman scattering (SERS) were studied. We realized such complex frame morphology by synthesizing analogous tripod nanoframes through multiple transformations. The precise control of the Au growth pattern led to uniform tripod nanoframes embedded with circle or line-shaped hot spots. The linear-shaped nanogaps ("Y"-shaped hot-zone) of the frame structures can strongly and efficiently confine the electric field, allowing for strong SERS signals. Coupled with a high synthetic yield of the targeted frame structure, strong and uniform SERS signals were obtained inside the nanoframe gaps. Remarkably, quite reproducible SERS signals were obtained with these structures-the SERS enhancement factors with an average value of 7.9 x 10(7) with a distribution of enhancement factors from 2.2 X 10(7) to 2.2 X 10(8) for 45 measured individual particles.
more