title: Halloysite nanotubes with immobilized silver nanoparticles for anti-bacterial application.
abstract: Halloysite nanotubes (HNTs) with immobilized silver (Ag) nanoparticles (NPs) were prepared by methods of wet chemistry and were characterized by using the transmission electron microscopy, x-ray diffraction, optical spectroscopy and experiments with E. coli bacteria in-vitro. It was found that Ag NPs with almost perfect crystalline structure and sizes from ∼9nm were mainly attached over the external surface of HNTs. The optical absorption measurement revealed a broad plasmonic resonance in the region of 400-600nm for HNTs with Ag NPs. The later samples exhibit bactericidal effect, which is more pronounced under illumination. A role of the plasmonic excitation of Ag NPs for their bioactive properties is discussed. The obtained results show that Ag NPs-decorated HNTs are promising agents for the antibacterial treatment.
authors.affiliation: Department of Chemical, Biological & Macro-Molecular Sciences, S. N. Bose National Centre for Basic Sciences, Block - JD, Sector-III, Salt Lake, Kolkata,700106, India. Electronic address: subhra.jana@bose.res.in.
authors.forename: Subhra
authors.initials: S
authors.lastname: Jana
authors.affiliation: Lomonosov Moscow State University, 119991 Moscow, Russia.
authors.forename: Anastasiya V
authors.initials: AV
authors.lastname: Kondakova
authors.affiliation: Lomonosov Moscow State University, 119991 Moscow, Russia.
authors.forename: Svetlana N
authors.initials: SN
authors.lastname: Shevchenko
authors.affiliation: Lomonosov Moscow State University, 119991 Moscow, Russia.
authors.forename: Eugene V
authors.initials: EV
authors.lastname: Sheval
authors.affiliation: Lomonosov Moscow State University, 119991 Moscow, Russia; Ural Federal University, 620002 Ekaterinburg, Russia.
authors.forename: Kirill A
authors.initials: KA
authors.lastname: Gonchar
authors.affiliation: Lomonosov Moscow State University, 119991 Moscow, Russia; National Research Nuclear University "MEPhI", 115409 Moscow, Russia.
authors.forename: Victor Yu
authors.initials: VY
authors.lastname: Timoshenko
authors.affiliation: Lomonosov Moscow State University, 119991 Moscow, Russia; Ural Federal University, 620002 Ekaterinburg, Russia.
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Vasiliev
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D000900:Anti-Bacterial Agents / Q000737:chemistry*; D000077215:Clay; D004926:Escherichia coli / Q000187:drug effects*; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D055095:Optics and Photonics; D012834:Silver / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D000538:Aluminum Silicates; D000900:Anti-Bacterial Agents; D012834:Silver; D000077215:Clay
keywords: Bactericidal effect; Halloysite clay; Immobilization; Metal nanoparticles; Plasmonic; Wet chemistry