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Synthesis and Single-Particle Surface-Enhanced Raman Scattering Study of Plasmonic Tripod Nanoframes with Y-Shaped Hot-Zones
- Title
- Synthesis and Single-Particle Surface-Enhanced Raman Scattering Study of Plasmonic Tripod Nanoframes with Y-Shaped Hot-Zones
- Authors
- Kim, Jeongwon; Yoo, Sungjae; Kim, Jae-Myoung; Choi, Sungwoo; Kim, Juri; Park, So-Jung; Park, Doojae; Nam, Jwa-Min; Park, Sungho
- Ewha Authors
- 박소정
- SCOPUS Author ID
- 박소정
- Issue Date
- 2020
- Journal Title
- NANO LETTERS
- ISSN
- 1530-6984
1530-6992
- Citation
- NANO LETTERS vol. 20, no. 6, pp. 4362 - 4369
- Keywords
- Nanoframe; Tripod; Hot-spot; Single-particle SERS; Nanogap
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- 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.
- DOI
- 10.1021/acs.nanolett.0c01084
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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