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

Abstract

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.

Cobalt sulfide-reduced graphene oxide: An efficient catalyst for the degradation of rhodamine B and pentachlorophenol using peroxymonosulfate

“…Upon GO reduction using hydrazine (refer to the SI for details), the intensity of vibrations related to oxygen functional groups are reduced significantly while the C--C vibration is blue-shifted to 1604 cm − 1 . These results clearly indicate GO reduction to rGO and restoration of the aromatic network, in accordance with our previous results [36].…”

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

“…6). This is in accordance with our previously obtained results for the coating of rGO and polyethyleneimine [18]. Also, previous studies of our colleagues from the group showed that the exfoliated graphene and GO did not have antibacterial properties [25,26], and they did not produce singlet oxygen, which is usually responsible for antibacterial activity of GO [27].…”

“…However, recently, it has attracted the attention of many researchers for biological applications, including biosensors, tissue engineering, and the design of antibacterial materials [11][12][13][14]. In order to improve the antibacterial activity of graphene, some research groups have prepared its nanocomposites with different polymers such as chitosan [15,16], polyamide [17], polyethyleneimine (PEI) [18] or poly(vinyl alcohol) [19]. Chitosan is a cationic biopolymer derived from chitin, with promising antimicrobial properties, excellent biocompatibility and biodegradability [20].…”

Photothermal-Induced Antibacterial Activity of Gold Nanorods Loaded into Polymeric Hydrogel against Pseudomonas aeruginosa Biofilm

“…Different types of materials were reported to generate heat that was sufficient to kill different types of bacteria in planktonic or biofilm cultures. Kim, et al, found that excitation of catechol-conjugated poly(vinylpyrrolidone) sulfobetaine linked to polyaniline by NIR laser caused temperature elevation (52–55 °C) that was efficient to kill Staphylococcus aureus and Escherichia coli after 3 min of NIR excitation [70]. Moreover, NIR laser excitation of graphene oxide-polyethyleneimine nanoheaters resulted in temperature elevation of more than 50 °C, that was capable to kill Staphylococcus aureus and Escherichia coli bacteria, in addition to Staphylococcus epidermidis bacterial biofilm [71].…”