title: Lantana camara leaf extract mediated silver nanoparticles: Antibacterial, green catalyst.
abstract: Silver nanoparticles (AgNPs) have been synthesized by Lantana camara leaf extract through simple green route and evaluated their antibacterial and catalytic activities. The leaf extract (LE) itself acts as both reducing and stabilizing agent at once for desired nanoparticle synthesis. The colorless reaction mixture turns to yellowish brown attesting the AgNPs formation and displayed UV-Vis absorption spectra. Structural analysis confirms the crystalline nature and formation of fcc structured metallic silver with majority (111) facets. Morphological studies elicit the formation of almost spherical shaped nanoparticles and as AgNO3 concentration is increased, there is an increment in the particle size. The FTIR analysis evidences the presence of various functional groups of biomolecules of LE is responsible for stabilization of AgNPs. Zeta potential measurement attests the higher stability of synthesized AgNPs. The synthesized AgNPs exhibited good antibacterial activity when tested against Escherichia coli, Pseudomonas spp., Bacillus spp. and Staphylococcus spp. using standard Kirby-Bauer disc diffusion assay. Furthermore, they showed good catalytic activity on the reduction of methylene blue by L. camara extract which is monitored and confirmed by the UV-Vis spectrophotometer.
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati 517502, India. Electronic address: ajithabondu@gmail.com.
authors.forename: B
authors.initials: B
authors.lastname: Ajitha
authors.affiliation: Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, South Korea.
authors.forename: Y
authors.initials: Y
authors.lastname: Ashok Kumar Reddy
authors.affiliation: Department of Microbiology, Sri Venkateswara University, Tirupati 517502, India.
authors.forename: Syed
authors.initials: S
authors.lastname: Shameer
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati 517502, India.
authors.forename: K M
authors.initials: KM
authors.lastname: Rajesh
authors.affiliation: Department of Zoology, Sri Venkateswara University, Tirupati 517502, India.
authors.forename: Y
authors.initials: Y
authors.lastname: Suneetha
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati 517502, India.
authors.forename: P
authors.initials: P
authors.lastname: Sreedhara Reddy
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D002384:Catalysis; D055772:Green Chemistry Technology; D032410:Lantana / Q000737:chemistry*; D053768:Metal Nanoparticles; D008751:Methylene Blue / Q000737:chemistry; D008826:Microbial Sensitivity Tests; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D012834:Silver / Q000737:chemistry* / Q000494:pharmacology*; D012835:Silver Nitrate / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000900:Anti-Bacterial Agents; D010936:Plant Extracts; D014867:Water; D012834:Silver; D012835:Silver Nitrate; D008751:Methylene Blue
keywords: AgNPs; Antibacterial activity; Green catalyst; Green synthesis; Leaf extract