Recently, bacterial cellulose (BC) based wound dressing have raised significant interests in medical fields. However, to our best knowledge, it is apparent that the BC itself has no antibacterial activity. In this study, we optimized graphene oxide-silver (GO-Ag) nanohybrid synthesis using Response Surface Methodology and impregnate it to BC and carefully investigate their antibacterial activities against both the Gram-negative bacteria and the Gram-positive bacteria . We discover that, compared to silver nanoparticles, GO-Ag nanohybrid with an optimal GO suspension's pH and ratio is much more effective and shows synergistically enhanced, strong antibacterial activities at rather low dose. The GO-Ag nanohybrid is more toxic to than that to . The antibacterial and mechanical properties of BC/GO-Ag composite are further investigated.
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http://dx.doi.org/10.1002/elsc.201700138 | DOI Listing |
Malaoxon, a highly toxic metabolite of malathion, can lead to severe harm or death if ingested. This study introduces a rapid and innovative fluorescent biosensor that relies on acetylcholinesterase (AChE) inhibition for detecting malaoxon using Ag-GO nanohybrid. The synthesized nanomaterials (GO, Ag-GO) were evaluated with multiple characterization methods to confirm their elemental composition, morphology, and crystalline structure.
View Article and Find Full Text PDFNanotechnology
November 2018
Medical Nanotechnology and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran.
In this study, we introduce a novel graphene oxide/silver/arginine (GO/Ag/Arg) nanohybrid structure, which can act as an angiogenesis promoter and provide antibacterial nanostructure for improving the wound healing process. GO/Ag nanostructure has been optimized in terms of the GO/Ag mass ratio and pH values using central composite design and the response surface method to increase the Ag loading efficiency. Then, Arg was chemically introduced to the surface of GO/Ag nanostructure.
View Article and Find Full Text PDFInt J Biol Macromol
September 2018
Laboratory of Dendrimers and Nano-Biopolymers, Faculty of Chemistry, University of Tabriz, Tabriz, Iran; Research Center for Pharmaceutical Nanotechnology (RCPN), Tabriz University of Medical Science, Tabriz, Iran. Electronic address:
The present project describes the facile preparation of novel pH-sensitive bio-nanocomposite hydrogel beads based on chitosan (CH) and GO-Ag nanohybrid particles for controlled release of anti-cancer drugs such as doxorubicin (DOX). The loading efficiency of doxorubicin into test beads was measured via UV-vis spectroscopy analysis and was found to be high. The formation of silver nanoparticles on the GO sheets and structural characteristics were evaluated via FT-IR, TEM, XRD, and SEM techniques.
View Article and Find Full Text PDFRecently, bacterial cellulose (BC) based wound dressing have raised significant interests in medical fields. However, to our best knowledge, it is apparent that the BC itself has no antibacterial activity. In this study, we optimized graphene oxide-silver (GO-Ag) nanohybrid synthesis using Response Surface Methodology and impregnate it to BC and carefully investigate their antibacterial activities against both the Gram-negative bacteria and the Gram-positive bacteria .
View Article and Find Full Text PDFACS Biomater Sci Eng
March 2017
Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong.
Antibacterial nanomaterials have attracted great interest in recent years, especially with an increase in antibiotic resistance of microbial organisms. However, deleterious properties such as aggregation, toxicity of nanoparticles, and low stability limit their practical application. In this respect, we have developed novel PLA-based fibrous mats with GO-Ag hybrid nanofillers through electrospinning for minimizing bacterial attachment and growth for biomedical applications.
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