期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
卷 24, 期 6, 页码 1483-1490出版社
SPRINGER
DOI: 10.1007/s10856-013-4896-3
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资金
- Council of Scientific & Industrial Research (CSIR), India
- Board of Research in Nuclear Science (BRNS), India
Silica-coated, silicon nanotubes (SCSNTs) and silica-coated, silicon nanoparticles (SCSNPs) have been synthesized by catalyst-free single-step gas phase condensation using the arc plasma process. Transmission electron microscopy and scanning tunneling microscopy showed that SCSNTs exhibited a wall thickness of less than 1 nm, with an average diameter of 14 nm and a length of several 100 nm. Both nano-structures had a high specific surface area. The present study has demonstrated cheaper, resistance-free and effective antibacterial activity in silica-coated silicon nano-structures, each for two Gram-positive and Gram-negative bacteria. The minimum inhibitory concentration (MIC) was estimated, using the optical densitometric technique, and by determining colony-forming units. The MIC was found to range in the order of micrograms, which is comparable to the reported MIC of metal oxides for these bacteria. SCSNTs were found to be more effective in limiting the growth of multidrug-resistant Staphylococcus aureus over SCSNPs at 10 mu g/ml (IC 50 = 100 mu g/ml).
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