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Title: Fabrication of Silver-Decorated Graphene Oxide Nanohybrids via Pulsed Laser Ablation with Excellent Antimicrobial and Optical Limiting Performance
Authors: Nancy, Parvathy
Jose, Jiya
Joy, Nithin
Valluvadasan, Sivakumaran
Philip, Reji
Antoine, Rodolphe
Thomas, Sabu
Kalarikkal, Nandakumar
Keywords: pulsed laser ablation
silver nanoparticles
graphene oxide
Ag-GO nanohybrid material
antimicrobial activity
optical limiting
Issue Date: Mar-2021
Publisher: Multidisciplinary Digital Publishing Institute - MDPI
Citation: Nanomaterials, 2021, Vol. 11, p880
Abstract: The demand for metallic nanoparticle ornamented nanohybrid materials of graphene oxide (GO) finds copious recognition by virtue of its advanced high-tech applications. Far apart from the long-established synthesis protocols, a novel laser-induced generation of silver nanoparticles (Ag NPs) that are anchored onto the GO layers by a single-step green method named pulsed laser ablation has been exemplified in this work. The second and third harmonic wavelengths (532 nm and 355 nm) of an Nd:YAG pulsed laser is used for the production of Ag NPs from a bulk solid silver target ablated in an aqueous solution of GO to fabricate colloidal Ag-GO nanohybrid materials. UV-Vis absorption spectroscopy, Raman spectroscopy, and TEM validate the optical, structural, and morphological features of the hybrid nanomaterials. The results revealed that the laser-assisted in-situ deposition of Ag NPs on the few-layered GO surface improved its antibacterial properties, in which the hybrid nanostructure synthesized at a longer wavelength exhibited higher antibacterial action resistance to Escherichia coli (E. coli) than Staphylococcus aureus (S. aureus) bacteria. Moreover, nonlinear optical absorption (NLA) of Ag-GO nanohybrid was measured using the open aperture Z-scan technique. The Z-scan results signify the NLA properties of the Ag-GO hybrid material and have a large decline in transmittance of more than 60%, which can be employed as a promising optical limiting (OL) material.
Description: Open Access
ISSN: 2079-4991
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Copyright: 2021 MDPI
Appears in Collections:Research Papers (LAMP)

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