Please use this identifier to cite or link to this item:
http://paper.sci.ui.ac.id/jspui/handle/2808.28/249
Title: | The Synthesis of Alginate-Capped Silver Nanoparticles under Microwave Irradiation |
Authors: | Foliatini Yulizar, Yoki Hafizah, Mas Ayu Elita |
Keywords: | alginate microwave irradiation particle size reducing and stabilizing agent silver nanoparticles (Ag-NPs) |
Issue Date: | 2015 |
Publisher: | Institute for Research and Community Services, Institut Teknologi Bandung |
Series/Report no.: | Volume 47;No. 1 |
Abstract: | Synthesis of silver nanoparticles (Ag-NP) was successfully performed within a few minutes by microwave irradiation of the precursor salt (AgNO3) and alginate mixed solution in one pot. Herein, alginate molecules acted as both a reducing and stabilizing agent for the preparation of the silver nanoparticles. The obtained nanoparticles were characterized by ultraviolet-visible (UV-Vis) spectroscopy, particle size analysis (PSA), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The pH and concentration ratio of the alginate/metal precursor salt greatly influenced the particle size and its distribution of Ag-NP. The higher the pH the higher the nucleation rate and the larger the electrostatic stabilization, while both of them were responsible for producing a smaller particle size and a narrower size distribution. A higher concentration ratio also yielded a smaller particle size and a narrower size distribution, but above the optimum ratio, the trend was conversely changed due to the reducing capability of the alginate, which was dominant above the optimum ratio, thus creating a high density of nuclei, allowing aggregation to occur. A lower ratio not only led to a higher tendency to produce larger particles, but also a higher probability of anisotropic particle shape formation due to the lack of reducing capability of the alginates. |
URI: | http://paper.sci.ui.ac.id/jspui/handle/2808.28/249 |
ISSN: | 2337-5760 |
Appears in Collections: | Journal Collection |
Files in This Item:
File | Description | Size | Format | |
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YokiYulizar.J.Math.Fund.2015.pdf | 4,84 MB | Adobe PDF | View/Open Request a copy |
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