Journal
NANOMATERIALS
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/nano11020477
Keywords
mesoporous silica; silver; nanocomposite; cetyltrimethylammonium bromide; antibacterial activity
Categories
Funding
- NPO Young Researchers Alliance
- Nazarbayev University Corporate Fund Social Development Fund
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The study demonstrated a highly efficient antibacterial nanocomposite by attaching silver nanoparticles to the surface of cetyltrimethylammonium bromide (CTAB)-loaded mesoporous silica nanoparticles. The improved antibacterial activity of the prepared nanocomposite can be attributed to the even distribution of non-aggregated silver nanoparticles per volume unit and the presence of CTAB in the nanocomposite pores.
To date, Ag-based nanomaterials have demonstrated a high potential to overcome antibiotic resistance issues. However, bare Ag nanomaterials are prone to agglomeration in the biological environment, which results in a loss of antibacterial activity over time. Furthermore, it is still challenging to collect small-sized Ag nanomaterials right after the synthesis process. In this study, spherical-shaped Ag nanoparticles (NPs) (similar to 6-10 nm) were attached on the surface of cetyltrimethylammonium bromide (CTAB)-loaded mesoporous silica nanoparticles (MSNs) (similar to 100-110 nm). Antibacterial activity tests suggested that the obtained nanocomposite can be used as a highly efficient antibacterial agent against both Gram-negative and Gram-positive bacterial strains. The minimum inhibitory concentration (MIC) recalculated to pure Ag weight in nanocomposite was found to be similar to 1.84 mu g/mL (for Escherichia colt) and similar to 0.92 mu g/mL (for Staphylococcus aureus)-significantly smaller compared to values reported to date. The improved antibacterial activity of the prepared nanocomposite can be attributed to the even distribution of non-aggregated Ag NPs per volume unit and the presence of CTAB in the nanocomposite pores.
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