Microwave-Assisted Synthesis of Alginate-Stabilized Gold Nanoparticles  

Oleh:

Foliatini ; Yulizar, Yoki ; Hafizah, Mas Ayu Elita

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Makara Seri Sains vol. 18 no. 4 (Dec. 2014), page 111 - 118.
Topik: alginate; Au nanoparticle (Au-NP); microwave irradiation; stabilizing mechanism
Fulltext: 4281-7981-2-PB_ros.pdf (410.9KB)

Isi artikel

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 (UVVis) 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 (HAuCl ) 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 HAuCl 4 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. 4

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