TY - JOUR
T1 - The synthesis of alginate-capped silver nanoparticles under microwave irradiation
AU - Foliatini,
AU - Yulizar, Yoki
AU - Hafizah, Mas Ayu Elita
N1 - Publisher Copyright:
© 2015, Published by ITB Journal Publisher.
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - Alginate
KW - Microwave irradiation
KW - Particle size
KW - Reducing and stabilizing agent
KW - Silver nanoparticles (Ag-NPs)
UR - http://www.scopus.com/inward/record.url?scp=84937914670&partnerID=8YFLogxK
U2 - 10.5614/j.math.fund.sci.2015.47.1.3
DO - 10.5614/j.math.fund.sci.2015.47.1.3
M3 - Article
AN - SCOPUS:84937914670
SN - 2337-5760
VL - 47
SP - 31
EP - 50
JO - Journal of Mathematical and Fundamental Sciences
JF - Journal of Mathematical and Fundamental Sciences
IS - 1
ER -