Reduced Graphene Oxide Functionalized with Gold Nanostar Nanocomposites for Synergistically Killing Bacteria through Intrinsic Antimicrobial Activity and Photothermal Ablation

2019 ◽  
Vol 2 (2) ◽  
pp. 747-756 ◽  
Author(s):  
Yonghai Feng ◽  
Qingyu Chen ◽  
Qing Yin ◽  
Guoqing Pan ◽  
Zhigang Tu ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Photothermal Ablation ◽  
Reduced Graphene ◽  
Gold Nanostar

Efficient capture and photothermal ablation of planktonic bacteria and biofilms using reduced graphene oxide–polyethyleneimine flexible nanoheaters

2019 ◽  
Vol 7 (17) ◽  
pp. 2771-2781 ◽  
Author(s):  
Milica Budimir ◽  
Roxana Jijie ◽  
Ran Ye ◽  
Alexandre Barras ◽  
Sorin Melinte ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gram Positive ◽  
Nanohole Array ◽  
Gram Negative ◽  
Planktonic Bacteria ◽  
Photothermal Ablation ◽  
Reduced Graphene

A flexible nanoheater device, consisting of a Au nanohole array coated with reduced graphene oxide–polyethyleneimine, was applied to capture and eradicate both Gram-positive and Gram negative planktonic bacteria and their biofilms.

scholarly journals Metal-Carbon Interactions on Reduced Graphene Oxide under Facile Thermal Treatment: Microbiological and Cell Assay

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
N. L. V. Carreño ◽  
A. M. Barbosa ◽  
V. C. Duarte ◽  
C. F. Correa ◽  
C. Ferrúa ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Graphene Oxide ◽  
Cell Viability ◽  
Reduced Graphene Oxide ◽  
Nanocomposite Films ◽  
Control Group ◽  
Cell Viability Assay ◽  
Viability Assay ◽  
Reduced Graphene

Silver-functionalized reduced graphene oxide (Ag-rGO) nanosheets were prepared by single chemical and thermal processes, with very low concentration of silver. The resulting carbon framework consists of reduced graphene oxide (rGO) sheets or 3D networks, decorated with anchored silver nanoparticles. The Ag-rGO nanosheets were dispersed into a polymer matrix and the composites evaluated for use as biological scaffolds. The rGO material in poly(dimethylsiloxane) (PDMS) has been tested for antimicrobial activity against Gram-positiveStaphylococcus aureus(S. Aureus) bacteria, after exposure times of 24 and 120 hours, as well as in the determination of cell viability on cultures of fibroblast cells (NIH/3T3). Using 1 mL of Ag-rGO in PDMS the antibacterial effectiveness againstStaphylococcus aureuswas limited, showing an increased amount of Colony Forming Units (CFU), after 24 hours of contact. In the cell viability assay, after 48 hours of contact, the group of 1 mL of Ag-rGO with PDMS was the only group that increased cell viability when compared to the control group. In this context, it is believed these behaviors are due to the increase in cell adhesion capacity promoted by the rGO. Thus, the Ag-rGO/PDMS hybrid nanocomposite films can be used as scaffolds for tissue engineering, as they limit antimicrobial activity.

Synthesis, characterization and enhanced antimicrobial activity of reduced graphene oxide–zinc oxide nanocomposite

2017 ◽  
Vol 4 (2) ◽  
pp. 025401 ◽  
Author(s):  
Rajveer Singh Rajaura ◽  
Vinay Sharma ◽  
Rishabh Shrivastava Ronin ◽  
Deepak K Gupta ◽  
Subodh Srivastava ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Zinc Oxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene

scholarly journals Reduced graphene oxide-chitosan flexible nanocomposites for efficient bacteria capture and photothermal ablation

2020 ◽  
Vol 5 (1) ◽  
pp. 5-12
Author(s):  
Milica Budimir ◽  
Duška Kleut ◽  
Biljana Todorovic Markovic ◽  
Rabah Boukherroub
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrostatic Interactions ◽  
Near Infrared ◽  
Bacterial Strains ◽  
Gram Positive ◽  
Antibiotic Resistant ◽  
Gram Negative ◽  
Photothermal Ablation ◽  
Reduced Graphene

AbstractOne of the major public health concerns today is bacterial infection-associated diseases. Traditional antibacterial therapies are becoming less efficient because frequent and inadequate use of antibiotics has caused mutations in bacteria that led to many antibiotic-resistant bacterial strains. It is, therefore, crucial to develop novel antibacterial materials and strategies that will successfully combat both gram-positive and gram-negative bacteria. In the present study, we will demonstrate a simple and efficient method for bacteria capture and elimination through photothermal ablation. The developed material consists of a flexible Kapton substrate, coated with reduced graphene oxide-chitosan (rGO-CS) thin films. Reduced graphene oxide has strong absorption in the near-infrared (NIR) region, while chitosan has the ability to bind bacteria through electrostatic interactions. The K/rGO-CS device proved to capture and efficiently eradicate both planktonic Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) bacteria after 10 min of NIR (980 nm) irradiation.

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