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      Sintesis Nanopartikel Emas Terfungsionalisasi Sitrat dengan Metode Ablasi Laser

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      Date
      2024
      Author
      Sari, Sovi Yana
      Rustami, Erus
      Putri, Kirana Yuniati
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      Abstract
      Nanopartikel emas terfungsionalisasi sitrat dengan metode ablasi laser berhasil disintesis dengan variasi parameter sintesis (panjang gelombang laser, energi laser, dan waktu ablasi). Sinar laser difokuskan pada plat emas dalam 6 ml larutan sitrat 0,1 mM. Karakterisasi morfologi menggunakan TEM menunjukkan adanya perbedaan rata-rata ukuran pada variasi parameter sintesis. Nanopartikel emas berukuran 22,05 nm dan 9,04 nm untuk variasi panjang gelombang 1064 nm dan 532 nm pada besar energi dan waktu ablasi yang sama. Hasil karkaterisasi menggunakan spektrofotometer UV-Vis menunjukkan pergeseran puncak SPR (Surface Plasmon Resonance) menuju panjang gelombang lebih kecil dengan bertambahnya energi laser maupun waktu ablasi. Puncak serapannya berada pada 517,43 nm, 517,58 nm, 515,92 nm, 515,31 nm, 513,95 nm, dan 513,50 nm untuk variasi energi 10 mJ, 15 mJ, 20 mJ, 25 mJ, 30 mJ, dan 35 mJ. Variasi waktu ablasi menghasilkan puncak SPR pada 513,05 nm (5 menit), 510,93 nm (10 menit), 509,87 nm (15 menit), 508,52 nm (20 menit), 505,19 nm (25 menit), 506,39 nm (30 menit).
       
      Gold nanoparticles functionalized citrate by laser ablation method were successfully synthesized with various synthesis parameters (laser wavelength, laser energy, and ablation time). The laser beam is focused on a gold plate in 6 ml of 0,1 mM citrate solution. Morphological characterization using TEM shows a difference in average size in variation of synthesis parameters. The gold nanoparticles measured 22,05 nm and 9,04 nm for wavelength variations of 1064 nm and 532 nm at the same energy magnitude and ablation time. Caracterization results using a UV-Vis spectrophotometer show a shift in the peak of SPR (Surface Plasmon Resonance) towards smaller wavelengths with increasing laser energy and ablation time. The absorption peaks are at 517,43 nm, 517,58 nm, 515,92 nm, 515,31 nm, 513,95 nm, and 513,50 nm for energy of 10 mJ, 15 mJ, 20 mJ, 25 mJ, 30 mJ, and 35 mJ. Ablation time variations resulted in SPR peaks at 513,05 nm (5 minutes), 510,93 nm (10 minutes), 509,87 nm (15 minutes), 508,52 nm (20 minutes), 505,19 nm (25 minutes), 506,39 nm (30 minutes).
       
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      http://repository.ipb.ac.id/handle/123456789/157930
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