1. Plasmon Hybridization of Au Hollow Nanocone Array for SERS Sensing.
- Author
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Cui, Songya, Su, Gang, Ren, Xiaohe, Wu, Xincheng, Peng, Liang, and Fu, Yongqi
- Subjects
- *
RAMAN scattering , *SERS spectroscopy , *POINT-of-care testing , *DETECTION limit - Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy plays a vital role in highly sensitive fingerprint detections and non-invasive point-of-care diagnostics. However, elaborate fabrication of a compact nanostructure-based plasmon hybridization to realize high-sensitivity SERS-active substrate remains a challenge. In this work, an Au hybrid hollow nanocone SERS substrate is successfully fabricated by ion-track technology. The overall electromagnetic enhancement is developed due to the synergistic effect of merging individual nanostructures onto one three-dimensional Au hybrid hollow nanocone SERS substrate. The near-field optical characterizations and the electromagnetic numerical simulations exhibit highly near-field nanofocusing. The reflectivity of the SERS substrate is less than 32%. The SERS spectra of rhodamine 6G molecules with a concentration detection limit of 10−8 M are analyzed, and the enhancement factor is ~ 0.75 × 105. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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