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Aplikasi Nanopartikel Emas Berbentuk Bone- Nanorods Untuk Deteksi Temephos Berbasis Sensor Plasmonik

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The excessive use of temephos pesticide will not only affect the desired target, but also affect non-targets such as the surrounding water ecosystem. To minimize this, gold nanoparticles have been made which are used as sensing materials for early detection of temephos. This study aims to synthesize and characterize bone-shaped gold nanoparticles (GBNRs) and analyze the potential of GBNRs as a sensing material for temephos detection. The method used to synthesize GBNRs is the Seed Mediated Growth (SMG) method. The successfully synthesized GBNRs were characterized using XRD, FESEM, and UV-Vis spectroscopy to determine their structure, morphology, and optical properties. Diffraction patterns from XRD characterization results at angles of 30°-60° show 2 diffraction peaks at diffraction angles 2θ: 38.10° and 44.37°. Based on the results of analysis using the X'pert HighScore program, the two diffraction peaks correspond to the (111) and (200) crystal planes in accordance with the standard data reference in the Inorganic Crystal Structure Database (ICSD) No. 00-002-1095. While the FESEM photo shows that the synthesized gold nanoparticles have a morphology in the form of Gold Bone-nanorods, with a length of 82.15 ± 8.43 nm, a width of 38.93 ± 6.49 nm, and an aspect ratio of 2.11 ± 0.06. The UV-Vis absorption spectrum of GBNRs showed a transverse surface plasmon resonance (t-SPR) peak at a wavelength of 590 nm and a longitudinal surface plasmon resonance (l-SPR) peak at a wavelength of 775 nm. The potential application of GBNRs for temephos detection was tested on LSPR sensors with testing stages namely, sensitivity, stability, and ripitability tests. GBNRs were tested on temephos with concentrations of 0.001 ppm, 0.01 ppm, 0.1 ppm, 1 ppm, 10 ppm, and 100 ppm. The results of testing the sensitivity of LSPR sensors to temephos show that the sensitivity is high and increases with increasing temephos concentration with R2 values close to the value of 1, namely 0.96 for t-SPR and 0.95 for l-SPR. The stability test results of GBNRs tested for 600 seconds showed that the LSPR sensor is very stable as shown by its low relative standard deviation value, which is 0.011% for DIW and 0.019% for temephos. In the ripitability test with 5 cycles, the average value of each cycle is not too far from the base value; at the peak of t-SPR respectively; 14291.8 (DI Water) and 14420.45 (temephos). While at the peak of l-SPR respectively; 18602.36 (DI Water) and 18893.21 (temephos).

Keywords: GBNR, temephos, LSPR sensor, seed-mediated growth

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2003112759

Penerbit

Pekanbaru : Universitas Riau FMIPA Fisika., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2003112759

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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