Pengembangan Substrat SERS Fleksibel Ag@FG melalui Teknik Microwave Satu Wadah untuk Meningkatkan Sinyal Raman Pewarna

Putri, Ismawati (2026) Pengembangan Substrat SERS Fleksibel Ag@FG melalui Teknik Microwave Satu Wadah untuk Meningkatkan Sinyal Raman Pewarna. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Substrat surface enhance Raman spectroscopy (SERS) fleksibel berbasis fiber glass (FG) dilapisi dengan nanopartikel perak (AgNPs) berhasil difabrikasi menggunakan metode microwave dalam satu wadah. Pengaruh waktu 25, 30, dan 35 detik, serta daya 470 dan 700 Watt pada iradiasi microwave terhadap performa SERS dikaji secara sistematis untuk menentukan kondisi optimum. Substrat SERS Ag-30H@FG menunjukkan performa optimum untuk meningkatkan sinyal Raman masing-masing pewarna, yaitu malachite green, methylene blue, congo red, dan eriochrome black T. Selain itu, Ag-30H@FG memperlihatkan sensitivitas yang baik, batas deteksi hingga 10-7 M dan peningkatan faktor mencapai 3 x 10^5. Reproduksibilitas, stabilitas, dan kemampuan penggunaan ulang yang memadai. Substrat ini juga memiliki fleksibilitas mekanik yang memungkinkan deteksi analit pada berbagai jenis kondisi permukaan. Lebih lanjut, substrat Ag-30H@FG mampu mendeteksi campuran pewarna secara simultan, yang menegaskan potensinya sebagai substrat SERS yang aplikatif untuk kebutuhan analisis nyata.
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A flexible fiberglass (FG)-based surface enhanced Raman scattering (SERS) substrate coated with silver nanoparticles (AgNPs) was successfully fabricated using a one-pot microwave method. The effect of microwave irradiation time 25, 30, and 35 seconds and power 470 and 700 Watt on SERS performance was systematically studied to determine the optimal conditions. The Ag-30H@FG SERS substrate exhibited optimal performance for each dye, namely malachite green, methylene blue, congo red, and eriochrome black T. Furthermore, the Ag-30H@FG substrate demonstrated excellent sensitivity, with a limit of detection of up to 10⁻⁷ M and an enhancement factor of 3 x 10⁵, along with satisfactory reproducibility, stability, and reusability. The substrate also exhibited good mechanical flexibility, enabling analyte detection on surfaces with various geometries and conditions. Moreover, the Ag-30H@FG substrate was capable of simultaneously detecting mixed dye analytes, highlighting its potential as a practical SERS substrate for real-world analytical applications.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Fiber glass, Microwave, Nanopartikel perak, dan SERS =========================== Fiber glass, Microwave, Silver nanoparticle, and SERS
Subjects:	Q Science > QC Physics > QC451 Spectroscopy
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 27101-(S2) Master Thesis
Depositing User:	Ismawati Putri
Date Deposited:	23 Jul 2026 04:06
Last Modified:	23 Jul 2026 04:06
URI:	http://repository.its.ac.id/id/eprint/136569

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