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Title: Microwave-Assisted Synthesis of Alginate-Stabilized Gold Nanoparticles
Authors: Foliatini
Yulizar, Yoki
Hafizah, Mas Ayu Elita
Keywords: alginate
Au nanoparticle (Au-NP)
microwave irradiation
stabilizing mechanism
Issue Date: Dec-2014
Publisher: DRPM Universitas Indonesia
Series/Report no.: Volume 18;Nomor 4
Abstract: An efficient and rapid method for preparation of Au nanoparticles (Au-NP) has been developed by direct microwave irradiation of metal precursor and alginate mixed solution in a single step. Here, alginate molecules act as both the reducing and stabilizing agents of Au-NP. The obtained nanoparticles were characterized by ultraviolet-visible (UV-Vis) spectroscopy, particle size analyzer, fourier transform infrared spectroscopy, and transmission electron microscopy. The nanoparticles have a spherical form and perfectly capped with alginate when using alginate and chloro auric acid (HAuCl4) precursor in the concentration range of 0.50 to 0.75% (w/v) and 0.40 mM, respectively. The use of a lower concentration of alginate and/or higher concentration of HAuCl4 caused agglomeration to occur, thereby resulting in a bigger size of Au-NP and red shifting of surface plasmon resonance (SPR) peak to a higher wavelength.
ISSN: 2339-1995 (Print) 2356-0851 (Online)
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