title: Ag@Ag8W4O16 nanoroasted rice beads with photocatalytic, antibacterial and anticancer activity.
abstract: Increasing resistance of pathogens and cancer cell line towards antibiotics and anticancer agents has caused serious health problems in the past decades. Due to these problems in recent years, researchers have tried to combine nanotechnology with material science to have intrinsic antimicrobial and anticancer activity. The metals and metal oxides were investigated with respect to their antimicrobial and anticancer effects towards bacteria and cancer cell line. In the present work metal@metal tungstate (Ag@Ag8W4O16 nanoroasted rice beads) is investigated for antibacterial activity against Escherichia coli and Staphylococcus aureus using Mueller-Hinton broth and the anticancer activity against B16F10 cell line was studied. Silver decorated silver tungstate (Ag@Ag8W4O16) was synthesized by the microwave irradiation method using Cetyl Trimethyl Ammonium Bromide (CTAB). Ag@Ag8W4O16 was characterized by using various spectroscopic techniques. The phase and crystalline nature were analyzed by using XRD. The morphological analysis was carried out using Field Emission Scanning Electron Microscopy (FE-SEM), and High Resolution Transmission Electron Microscopy (HR-TEM). Further, Fourier Transform Infrared Spectroscopy (FT-IR) and Raman spectral analysis were carried out in order to ascertain the presence of functional groups in Ag@Ag8W4O16. The optical property was investigated using Diffuse Reflectance Ultraviolet-Visible Spectroscopy (DRS-UV-Vis) and the band gap was found to be 3.08eV. Surface area of the synthesized Ag@Ag8W4O16 wasanalyzed by BET analysis and Ag@Ag8W4O16 was utilized for the degradation of organic dyes methylene blue and rhodamine B. The morphology of the Ag@Ag8W4O16 resembles roasted rice beads with breath and length in nm range. The oxidation state of tungsten (W) and silver (Ag) was investigated using X-ray photoelectron spectroscopy (XPS).
authors.affiliation: Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India.
authors.forename: Muthamizh
authors.initials: M
authors.lastname: Selvamani
authors.affiliation: Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India.
authors.forename: Giribabu
authors.initials: G
authors.lastname: Krishnamoorthy
authors.affiliation: Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India.
authors.forename: Manigandan
authors.initials: M
authors.lastname: Ramadoss
authors.affiliation: Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India.
authors.forename: Praveen Kumar
authors.initials: PK
authors.lastname: Sivakumar
authors.affiliation: Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India.
authors.forename: Munusamy
authors.initials: M
authors.lastname: Settu
authors.affiliation: Department of Chemistry, SRM University, Ramapuram Campus, Chennai, 600 089, India.
authors.forename: Suresh
authors.initials: S
authors.lastname: Ranganathan
authors.affiliation: Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India. Electronic address: vnnara@yahoo.co.in.
authors.forename: Narayanan
authors.initials: N
authors.lastname: Vengidusamy
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D045744:Cell Line, Tumor; D004926:Escherichia coli / Q000187:drug effects; D053768:Metal Nanoparticles / Q000737:chemistry*; D051379:Mice; D036103:Nanotechnology / Q000379:methods*; D012275:Oryza; D012834:Silver / Q000737:chemistry* / Q000494:pharmacology; D013211:Staphylococcus aureus / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D012834:Silver
keywords: Antibacterial; Anticancer; Methylene blue; Nanoroasted rice beads; Photocatalyst; Rhodamine B