Evaluation of Antibacterial and Anticancer Potential of Polyaniline-Bimetal Nanocomposites Synthesized from Chemical Reduction Method
Journal of Cluster Science(2019)
摘要
This study gold (Au) and gold–platinum (Au–Pt) colloids were synthesized by borohydride reduction method in the presence of poly(N-vinyl-2-pyrrolidone) as a stabilizing agent. Besides, pristine polyaniline (PANI), PANI-Au nanocomposites, and PANI-Au–Pt nanocomposites were prepared. The synthesized nano-composites characterized by UV–Vis, FT-IR, XRD, and HR-TEM with energy dispersive X-ray techniques. Au and Au–Pt NPs were spherical in shape with particle sizes at 8 and 3 nm, respectively. PANI-Au and PANI-Au–Pt nanocomposites were also spherical in shape with particle sizes at 3 and 2 nm, respectively. Pristine PANI, PANI-Au, and PANI-Au–Pt nanocomposites were subjected to antibacterial activity against gram-positive ( Bacillus subtilis and Staphylococcus aureus ) and gram-negative ( Escherichia coli and Vibrio cholerae ) bacterial pathogens. PANI-Au–Pt nanocomposite showed significant antibacterial activity (33 ± 1.10 mm dia) against B. subtilis . Besides, the MIC of pristine PANI, PANI-Au, and PANI-Au–Pt nanocomposites were found to be 75, 50 and 25 µg/mL, respectively. Besides, the in vitro anticancer investigations against HepG2 liver cancer cells revealed the highest cytotoxicity for PANI-Au–Pt nanocomposite (21.25 µg/mL) followed by PANI-Au nanocomposite (32 µg/mL) and pristine PANI (49 µg/mL). Overall, the present study showed considerable antibacterial and anticancer activity and suggested their potential use in pharmaceuticals after completing successful clinical trials for safety and affordability.
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关键词
Polyaniline-bimetal, Nanocomposite, Antibacterial activity, Clinical pathogens, Anticancer activity
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