Contact Mechanism of the Ag-doped Trimolybdate Nanowire as An Antimicrobial Agent

Abstract

Antibacterial Ag-agents are intensively applied as broad spectrum, high-stability, high-efficiency and high-safety inorganic antibacterial agents. We have developed a new kind of antibacterial Ag-agent, namely Ag2−x(NH4)xMo3O10·3H2O nanowires (NWs). Carrying Ag atoms in the lattice and Ag-rich nanoparticles on the surface, the Ag-doped NWs show strong antibacterial effects for a variety of bacteria including E. coli, Staphylococcus aureus, Candida albicans and Aspergillus niger. By performing systematic comparison experiments, we have proven that the main antibacterial effects are neither resulted from the tiny amount of Ag + ions released from the Ag-doped NWs in aqueous solutions, nor resulted from Ag-rich nanoparticles of fragments of the NWs when they are slowly dissolved in the Martin broth. Instead, the effects are mainly resulted from a contact mechanism, under which, the Ag-doped NWs need to be physically in contact with the bacteria to be eliminated. This is a novel phenomenon observed in the interactions between nanomaterials and live cells, which is worthy of further investigation at the molecular scale. As the Ag-doped NWs are not dissolved in pure water or weak acids, one may find practical antibacterial applications in textile industry and food storage industry for these unique nanomaterials.

Dual-Fuel-Driven Bactericidal Micromotor

“…We adopt the E . coli as the model bacteria, which is a threat to the human health [ 33 ]. In order to examine the effect of the micromotor on the bacteria, we first add the Ag/Mg micromotor to the solution containing E .…”

Polymer Film Supported Bimetallic Au–Ag Catalysts for Electrocatalytic Oxidation of Ammonia Borane in Alkaline Media

“…Gold nanoparticles are remarkable examples of nanoscaled electrocatalysts with new properties that have been used in fuel cells [ 20 – 23 ], sensors [ 24 – 26 ], as well as many other applications due to their small dimensional size, good stability, and excellent catalytic activity. Silver nanoparticles are also widely used in electrochemistry as electrode materials due to their high catalytic activity, novel optical property, and low cost compared to other noble metals [ 27 – 31 ]. In our previous study, Ag nanoparticles were synthesized on poly(thiophene)-modified glassy carbon electrode (GCE) surface using cyclic voltammetry (CV) and then applied to the electrocatalytic caffeic acid oxidation [ 32 ].…”

Phytochemically Functionalized Cu and Ag Nanoparticles Embedded in MWCNTs for Enhanced Antimicrobial and Anticancer Properties

“…These results suggest that the biohybrid nanomaterials can compete with commercial antimicrobial agents. Enhanced biocidal activity is reported [ 23 , 36 , 37 ] for composites of AgNPs-functionalized MWCNTs and AgNPs-functionalized trimolybdate nanowires when compared to MWCNTs, trimolybdate nanowires, and AgNPs alone.…”