https://scholars.lib.ntu.edu.tw/handle/123456789/625282
標題: | Novel strategy for flexible and super-hydrophobic SERS substrate fabricated by deposited gold nanoislands on organic semiconductor nanostructures for bio-detection | 作者: | Wang K.-S Tseng Z.-L Liu C.-Y Kuan T.-Y RU-JONG JENG Yang M.-C Wang Y.-L Liu T.-Y. |
關鍵字: | Evaporation method; Flexible substrates; Organic conjugated molecules; Surface- enhanced Raman spectroscopy (SERS) detection | 公開日期: | 2022 | 卷: | 435 | 來源出版物: | Surface and Coatings Technology | 摘要: | A new flexible, super-hydrophobic, and highly sensitive polydimethylsiloxane (PDMS) based-substrate would be developed for surface-enhanced Raman spectroscopy (SERS) detection. PDMS substrate is modified by nitrogen plasma and then deposited the organic conjugated molecules (α, ω-diperfluorohexylquaterthiophene, DFH-4T) films various thickness of Au nanoislands. The perfluorohexyl (-n-C6F13) chain of DFH-4T displays the advantages of high volatility and low vapor deposition temperature and can form a super-hydrophobic ivy-like nanostructure. After depositing the Au nanoislands on DFH-4T, the vertically arranged Au-DFH-4T nanostructure combined provides a tip-focusing effect and generates a very high electromagnetic field to enhance the Raman signal. Benefiting from the hydrophobic ivy-like nanostructure (maximum contact angle: ~146o) of Au@DFH-4T nanostructure, the hydrophobic molecule (vitamin D3, cholecalciferol) can be measured at ultralow concentration (10−10 M). Moreover, the flexible SERS sensor exhibited acceptable efficiency and durability after 100 cycles bending tests. SERS intensity would increase ~1.6 time at 0.35 cm bending radius. This facile and efficient detection technique for meeting the increased demands for bio-detection, especially for hydrophobic biomolecules. © 2022 |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124965766&doi=10.1016%2fj.surfcoat.2022.128251&partnerID=40&md5=ea5840c6ebb96ff4dad492824ebd04a2 https://scholars.lib.ntu.edu.tw/handle/123456789/625282 |
ISSN: | 02578972 | DOI: | 10.1016/j.surfcoat.2022.128251 | SDG/關鍵字: | Bending tests; Contact angle; Durability; Electromagnetic fields; Gold deposits; Hydrophobicity; Light transmission; Molecules; Plasma CVD; Polydimethylsiloxane; Raman spectroscopy; Silicones; Substrates; Biodetection; Conjugated molecules; Evaporation method; Flexible substrate; Hydrophobics; Nano-islands; Organic conjugated molecule; Organics; Surface enhanced Raman spectroscopy; Surface- enhanced raman spectroscopy detection; Nanostructures |
顯示於: | 高分子科學與工程學研究所 |
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