纳米团簇
材料科学
等离子体子
纳米技术
基质(水族馆)
胶体金
拉曼光谱
表面等离子共振
纳米结构
表面改性
纳米颗粒
蚀刻(微加工)
化学工程
光电子学
光学
图层(电子)
海洋学
物理
工程类
地质学
作者
Jinlong Yang,Xinxing Zhang,Geng Li,Chao Xia,Xin Chen,Wenzhong Yang,Hui Xu,Zhiqun Lin
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:16 (6): 2877-2882
摘要
3D raspberry-like core/satellite nanostructures were prepared by controlled surface functionalization of silica spheres using crosslinked poly(4-vinylpyridine) (P4VP) chains with known binding affinity for gold nanoparticles (AuNPs). The 3D SiO2-g-P(4VP-co-DVB)/AuNP nanoraspberries can be further transformed into 2D plasmonic nanoclusters by etching the silica core with hydrofluoric acid (HF). After the transformation, the interparticle distance between the AuNPs dramatically reduced from a 10 nm scale to sub 2 nm. Owing to the strong electromagnetic field generated by the plasmonic coupling between AuNPs in very close proximity, the established P(4VP-co-DVB)/AuNP nanoclusters provided strong and undisturbed Raman signals as a SERS substrate. In addition, benefiting from the stabilizing effect of the crosslinked P(4VP-co-DVB) network, the prepared SERS substrate has the advantages of good uniformity, stability and reproducibility, as well as strong SERS enhancement, endowing it with great potential for rapid and efficient SERS detection.
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