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
URI:	http://hdl.handle.net/2289/7773
ISSN:	2079-4991
Alternative Location:	https://doi.org/10.3390/nano11040880
Copyright:	2021 MDPI
Appears in Collections:	Research Papers (LAMP)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.