拉曼光谱
表面增强拉曼光谱
光谱学
材料科学
纳米技术
曲面(拓扑)
光电子学
化学物理
化学
拉曼散射
光学
物理
几何学
数学
量子力学
作者
Tae-Young Moon,HuiTae Joo,Bamadev Das,Yang Mo Koo,Mingu Kang,Hyeongwoo Lee,Sunghwan Kim,Cheng Chen,Yung Doug Suh,Dai-Sik Kim,Kyoung‐Duck Park
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-03-18
标识
DOI:10.1021/acs.nanolett.4c00289
摘要
Gap plasmon (GP) resonance in static surface-enhanced Raman spectroscopy (SERS) structures is generally too narrow and not tunable. Here, we present an adaptive gap-tunable SERS device to selectively enhance and modulate different vibrational modes via active flexible Au nanogaps, with adaptive optical control. The tunability of GP resonance is up to ∼1200 cm–1 by engineering gap width, facilitated by mechanical bending of a polyethylene terephthalate substrate. We confirm that the tuned GP resonance selectively enhances different Raman spectral regions of the molecules. Additionally, we dynamically control the SERS intensity through the wavefront shaping of excitation beams. Furthermore, we demonstrate simulation results, exhibiting the mechanical and optical properties of a one-dimensional flexible nanogap and their advantage in high-speed biomedical sensing. Our work provides a unique approach for observing and controlling the enhanced chemical responses with dynamic tunability.
科研通智能强力驱动
Strongly Powered by AbleSci AI