https://scholars.lib.ntu.edu.tw/handle/123456789/630032
標題: | Thiol-End-Group Dendrons Decorated with Gold Nanoparticles Immobilized on Amino-Functionalized Graphene Oxide for SERS Detection | 作者: | Wang, Kuan Syun Wu, Chien Hsin Huang, Chi Hsien Cheng, Yu Wei RU-JONG JENG Liu, Ting Yu |
關鍵字: | gold nanoparticles | low-damage plasma treatment | precise synthesis | surface-enhanced Raman scattering (SERS) detection | thiol end-group dendritic polymer | 公開日期: | 10-三月-2023 | 出版社: | AMER CHEMICAL SOC | 卷: | 5 | 期: | 3 | 來源出版物: | ACS Applied Polymer Materials | 摘要: | Surface-enhanced Raman scattering (SERS) has abundant chemical fingerprint information to analyze complex analytes under aqueous conditions. However, SERS requires uniform metal particles to generate a hotspot effect and improve sensitivity and enhancement by localized surface plasmon resonance. Therefore, in this study, SERS detection chips have been developed using uniform gold nanoparticle (AuNP) arrays embedded on thiol-end-group dendritic polymers immobilized on amino-functionalized graphene oxide (AGO) thin films of transmission electron microscopy (TEM) grids. The graphene oxide (GO) thin film was fabricated by low-damage plasma with mixed gas (O2/H2) and then further functionalized by diethylenetriamine to form AGO substrates. Based on the efficient building block of dual-functional 4-isocyanato-4′-(3,3-dimethyl-2,4-dioxo-azetidino)-diphenylmethane (IDD), the 0.5 and 1.5 generations of thiol-end-functionalized poly(urea/malonamide) dendrons (DG0.5-SH and DG1.5-SH) were precisely synthesized and grafted onto AGO substrates. The interparticle gap of AuNPs could be well controlled and decorated on these thiol-end-group dendrons to achieve the optimal SERS enhancement effect by manipulating the sizes of AuNPs and generating dendrons. The results indicate that 31 nm AuNPs immobilized on the DG0.5-SH@AGO substrate exhibited reproducible and strong SERS enhancement compared with free AuNPs. Graphene-based SERS substrates provide rapid and stable SERS detection in solutions, which offers great potential for practical applications in detecting biomolecules and environmental pollutants. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/630032 | ISSN: | 2637-6105 | DOI: | 10.1021/acsapm.2c01871 |
顯示於: | 高分子科學與工程學研究所 |
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