Copper Sulfide Nanoparticle/Cellulose Composite Paper: Room-Temperature Green Fabrication for NIR Laser-Inducible Ablation of Pathogenic Microorganisms

Abstract

This work reports a new type of near-infrared (NIR) laser-inducible antimicrobial composite paper based on copper sulfide nanoparticles (CuS NPs). For the first time, a smart and green method to prepare CuS NPs was developed by taking advantage of the copper−amine complex as the copper source and sodium sulfide as the sulfur source at room temperature, in which a biopolymer xylan was used as the growth template and stabilizing agent. The obtained xylan/CuS NPs composites (CuS@Xylan NPs) were spherical and stable with an average diameter of ∼10 nm. CuS@Xylan NPs were subsequently allowed to penetrate into cellulose nanofiber (CNF) networks to prepare the composite paper. This CuS@Xylan NPs/CNF composite paper showed strong NIR laser-inducible antimicrobial effect on Escherichia coli, Bacillus subtilis, Stapylococcus aureus, and Aspergillus niger. In addition, the tensile strength, tear strength, and burst strength of the composite paper were improved likely due to the strong hydrogen bonding between xylan and CNFs. This study provides a novel strategy to synthesize CuS NPs and generation of a new proof-of-concept type of composite paper for convenient ablation of pathogenic microorganisms, which has a potential to be applied to skin wound infection prevention for rapid wound healing.

Antifungal evaluation studies of copper sulfide nano-aquaformulations and its impact on seed quality of rice (Oryzae sativa)

“…However, prepared CuS NPs in solid form have been reported using different sulfide sources viz. sodium sulfide (Huang et al 2017;Riyaz et al 2016;Ayodhya et al 2016;Shamsipur et al 2013;Castillon-Barraza et al 2011;Ding et al 2010), sodium thiosulfate (Nafees et al 2015;Kundu and Pradhan 2013; Percent radial growth inhibition ¼ Radial growth of fungal colony in control À Radial growth of fungal colony in treatment Radial growth of fungal colony in control  100 With the increase in level of capping the size reduces and in turn, the k max value get relatively blue shifted (Rani 2016), which is the most probable explanation for the altered optical properties of nanoparticles when capped.…”

Antimicrobial effect of PEG–PLA on food-spoilage microorganisms

“…2). Huang et al [28] observed that different microbial cell structures may be an important reason for the different antimicrobial effects. Unlike the other microorganisms, the fungus A. niger has a denser cell wall; moreover, and it is very difficult to inhibit its fungal spores.…”

Seawater Desalination by Interfacial Solar Vapor Generation Method Using Plasmonic Heating Nanocomposites

“…In this work, we report a Cu 2-x S NRs-PVA gel approach, comprising photothermal generators (Cu 2-x S NRs) [ 23 ] and a floatable PVA supporting base [ 24 ]. Copper chalcogenide semiconductor nanocrystals were considered as the most promising green and sustainable photothermal agents, due to their low cost, high photo-stability, and high absorption cross-section, which could efficiently convert solar energy into heat [ 25 , 26 , 27 , 28 ]. The hierarchical structure in PVA hydrogel, which consists of big channels, capillary channels, and micro holes, can efficiently replenish and transport water into confined areas for localized heating [ 22 ].…”