紙基與花瓣微奈米結構運用於超高靈敏度表面增強拉曼散射技術

周欣宜

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紙基與花瓣微奈米結構運用於超高靈敏度表面增強拉曼散射技術

Applications of Paper-Based and Rose Petal-Based Micro-nanostructures on Ultrasensitive Surface-Enhanced Raman Scattering Technique

周欣宜 , Masters　　Advisor：陳學禮　　

繁體中文

表面增強拉曼散射基板；局域性表面電漿共振現象；雷射熱退火；紙基材；生物疏水結構； localized surface plasma resonance (LSPR) ； surface-enhanced Raman scattering (SERS) ； laser-induced annealing ； paper substrates ； bio-hydrophobic natural substrates

Abstract │ Reference (134) │ Altmetrics

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In this thesis, practical methods of preparing highly sensitive and reproducible surface-enhanced Raman scattering (SERS) substrates by using natural substrates to create closely arranged metallic micro-nanostructures were developed. In the first part of the thesis, we fabricated paper-based SERS substrates with highly dense metal nanoparticles (NPs) obtained by fine-tuning the excimer laser-induced annealing process. The high electric field enhancement caused by the nanogaps among metal NPs on the fibers of paper substrates can be achieved. Besides, by using the perfluorooctyl- trichlorosilane treatment, paper substrates could be changed to hydrophobic. Therefore, the analytes could be condensed as well as confined with enhancement of Raman scattering signal. Therefore, paper-based surface-enhanced Raman scattering substrates are able to detect down to attomalar (10-18 M) for 4-ATP. We accomplish inexpensive, easy-prepare, disposable SERS substrates with ultrahigh sensitivity and reproducibility. 
In the second part of the thesis, we developed an eco-friendly process for SERS on the basis of bio-hydrophobic natural substrates. By means of superhydrophobic condensation effect, the Ag NPs could be condensed and gathered on the rose petal to prepare highly efficient SERS substrate. The narrow interparticle nanogaps among the adjacent Ag NPs can dramatically enhance electric field due to localized surface plasma resonance (LSPR) and the enhancement of Raman scattering can also rise. The hydrophobic property of rose petal surface is also able to condense analytes for efficient Raman detection. The limit of detection for R6G on a rose-based SERS substrate could down to 10-15 M. A great SERS substrate can be accomplished with a simple fabrication by means of the nature materials and structures. In this thesis, the natural, ultrahigh sensitivity and low-cost SERS substrates have been developed and can provide great potential to apply Raman detection extensively in practical analysis.

Reference ( 134 ) 〈TOP〉

[1] A. P. Alivisatos, Acs Nano 2008, 2, 1514–1516.
[2] C. Burda, X. Chen, R. Narayanan, M. A. El-Sayed, Chem. Rev. 2005, 105, 1025–1102.
[3] M. Faraday, Philos. Trans. R. Soc. Lond. 1857, 147, 145–181.
[4] A. N. Shipway, E. Katz, I. Willner, ChemPhysChem 2000, 1, 18–52.
[5] M. Dragoman, D. Dragoman, Prog. Quantum Electron. 2008, 32, 1–41.

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