Faridawati, Faridawati (2024) Studi Sifat Opto-Plasmonik Pada Senyawa Karbon Grafena Biomassa Dengan Cacat Struktur. Doctoral thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Oksida grafena tereduksi (rGO) dari biomassa telah dieksplorasi secara intensif dan ekstensif untuk meningkatkan kinerja sensor SPR. Pada penelitian ini dipelajari sifat optik dari rGO biomassa melalui rekayasa cacat struktur yang dihubungkan dengan keberadaan plasmon. Telah dilakukan pendekatan baru untuk mempelajari sifat plasmonik material rGO dengan rekayasa cacat melalui karakteristik sifat optiknya secara lengkap. Energi Urbach, indeks bias, konstanta dielektrik, konduktivitas optik, dan fungsi kehilangan (loss function) menjadi parameter utama yang dihubungkan dengan sifat plasmon, baik itu plasmon konvensioanal, maupun plasmon berkorelasi (correlated plasmon). Temuan ekperimental ini diverifikasi ulang melalui uji Surface plasmon resonan (SPR) dengan menggunakan sistim Prisma/Au/rGO dengan variasi rekayasa cacat dan ketebalan rGO. Didapatkan hasil bahwa penambahan rGO biomassa dengan cacat struktur mampu mengoptimalkan pergeseran sudut SPR. Lebih lanjut, penambahan rGO dengan variasi ketebalan didapatkan hasil bahwa dengan kondisi ketebalan yang tepat akan mampu mengoptimalkan pergeseran sudut SPR, dan di pihak lain, semakin tebal rGO justru akan menurunkan kinerja sensor. rGO biomassa dengan cacat struktur terbanyak dan dengan ketebalan yang tepat dapat menjadi alternatif dalam pengembangan dan optimalisasi desain sensor berbasis SPR.
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Reduced graphene oxide (rGO) from biomass has been intensively and extensively explored to improve the performance of surface plasmon resonance (SPR) sensors. In this study, we explore the overall optical properties of rGO biomass through defect engineering associated with the presence of plasmons. We investigate a new approach at a new technique to studying the plasmonic properties of rGO materials by using defect engineering and the whole range of their optical properties. Urbach energy, refractive index, dielectric constant, optical conductivity, and loss function are the main parameters associated with plasmon qualities, both conventional and correlated plasmons. These experimental findings were re-verified through SPR tests using the prism/Au/rGO system with variations in defect engineering of rGO and its thickness. The results revealed that adding rGO biomass with structural defects has optimised the shift in the SPR angle. While adding rGO with different thicknesses, the results showed that with the optimal thickness conditions would be able to optimize the shift in the SPR angle. The greater the thickness, the weaker the sensor performance. The rGO biomass with the greatest structural defects and the proper thickness can be an alternative to develop and optimize the design of SPR-based sensors.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Uncontrolled Keywords: | Sifat Optik, Plasmon, SPR, Biosensor, rGO, cacat struktur |
| Subjects: | T Technology > T Technology (General) T Technology > T Technology (General) > TA404 Materials--Biodegradation |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45001-(S3) PhD Thesis |
| Depositing User: | FARIDAWATI FARIDAWATI |
| Date Deposited: | 10 Jan 2025 01:06 |
| Last Modified: | 10 Jan 2025 01:06 |
| URI: | http://repository.its.ac.id/id/eprint/116241 |
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