Silicon Nanoparticles Synthesized Via Microemulsion With Various Parameters
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Date
2011-01
Authors
Liong, Wai Lap
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Silicon nanoparticles (SiNPs) have attracted considerable interests from researchers as it is an interesting material in pharmaceutical and optoelectronic field. Research objective is to obtain SiNPs (< 100nm) without agglomeration. Various parameters had been used such as variations of silicon precursor concentrations, reduction agent concentrations, surfactant agent amounts with different molecular weight, and different organic solvents. In this study, silicon tetrachloride (SiCl4) was used as a starting material and mixed with stabilizer sodium hydroxide (NaOH), surfactant/capping agent and reduction agent. Only suitable concentration and amount that could be used to produce well disperse SiNPs were 0.20M of SiCl4, 0.50M of hydrazine (N2H5OH), 0.05M of sodium borohydride (NaBH4), 0.15M of tetraoctylammonium bromide (TOAB), 50ml of polyethylene glycol (PEG) 200wt% and 25g of PEG 10Kwt%, respectively. All SiNPs had been confirmed by using FESEM, EDX, and UV-visible spectroscopy. Meanwhile, TEM, FTIR, Raman and EELS only emphasized on certain SiNPs samples. In order to reduce the size as well as to improve the dispersion and to modify nanovectors for drug delivery, the PEG was used. PEG 200wt% had obviously shown the impact and effect on the SiNPs, which core shell structure had been obtained. The thickness of the PEG coating was about 5nm. From this study, it also found that ethanol was the best solvent in disperse of SiNPs which with 55.68nm mean size. Well disperse SiNPs were successfully synthesized in this study.
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Keywords
Silicon nanoparticles synthesized via , microemulsion with various parameters