ESTD PERPUSTAKAAN UNTAD
ESTD PERPUSTAKAAN UNTAD
| JudulGREEN SYNTHESIZED NANOPARTIKEL PERAK (AgNP) BERBASIS EKSTRAK DAUN KAKAO (Theobroma Cacao L.) DAN APLIKASINYA PADA BIOSENSOR SURFACE PLASMON RESONANCE (SPR) |
| Nama: NUR FADILLAH |
| Tahun: 2024 |
| Abstrak Green synthesis of silver nanoparticles (AgNPs) using cocoa leaf extract and their application on a surface plasmon resonance (SPR) biosensor has been conducted. This study aims to obtain silver nanoparticles (AgNPs) utilizing cocoa leaf extract and to determine the SPR characteristic curve following the addition of silver nanoparticles atop a thin gold layer. AgNPs were synthesized through the green synthesis method, employing cocoa leaf extract as a bioreductor. Subsequent characterization was performed via UV-Vis spectroscopy, TEM analysis, and FTIR spectroscopy. The SPR curve was observed using the Kretschmann configuration method in a prism/Au/AgNP/air layer arrangement. SPR results indicated that the SPR phenomenon curve experienced an angular shift as the AgNP concentration on the prism surface increased. Characterization results revealed that the size of AgNPs was (24,29 ± 5,24) nm. SAED results demonstrated the formation of diffraction rings with the presence of lattice planes (111), (200), (220), and (311), indicating a facecentered cubic (FCC) crystal structure of silver. The absorbance peak of AgNPs occurred at a wavelength of 332 nm. Functional groups observed from AgNPs exhibited wave numbers at 3316, 2113, and 1622 cm-1, associated with O-H, C-H, and C=O bonds, respectively. Keywords: Green Synthesis, Silver Nanoparticles, Surface Plasmon Resonance |