2021 journal article

A Liquid Metal Mediated Metallic Coating for Antimicrobial and Antiviral Fabrics.

Advanced Materials (Deerfield Beach, Fla.), 9.

By: K. Kwon n, S. Cheeseman*, A. Frias-De-Diego n, H. Hong*, J. Yang n, W. Jung*, H. Yin*, B. Murdoch* ...

co-author countries: Australia 🇦🇺 Korea (Republic of) 🇰🇷 United States of America 🇺🇸
author keywords: antimicrobial; antiviral; galvanic replacement; liquid metal fabric coating
MeSH headings : Alloys / chemistry; Anti-Infective Agents / chemistry; Anti-Infective Agents / pharmacology; Antiviral Agents / chemistry; Antiviral Agents / pharmacology; Bacteria / drug effects; Coated Materials, Biocompatible / chemistry; Coated Materials, Biocompatible / pharmacology; Copper / chemistry; Fungi / drug effects; Gallium / chemistry; Textiles / analysis; Viruses / drug effects
Source: ORCID
Added: September 28, 2021

Abstract Fabrics are widely used in hospitals and many other settings for bedding, clothing, and face masks; however, microbial pathogens can survive on surfaces for a long time, leading to microbial transmission. Coatings of metallic particles on fabrics have been widely used to eradicate pathogens. However, current metal particle coating technologies encounter numerous issues such as nonuniformity, processing complexity, and poor adhesion. To overcome these issues, an easy‐to‐control and straightforward method is reported to coat a wide range of fabrics by using gallium liquid metal (LM) particles to facilitate the deposition of liquid metal copper alloy (LMCu) particles. Gallium particles coated on the fabric provide nucleation sites for forming LMCu particles at room temperature via galvanic replacement of Cu 2+ ions. The LM helps promote strong adhesion of the particles to the fabric. The presence of the LMCu particles can eradicate over 99% of pathogens (including bacteria, fungi, and viruses) within 5 min, which is significantly more effective than control samples coated with only Cu. The coating remains effective over multiple usages and against contaminated droplets and aerosols, such as those encountered in facemasks. This facile coating method is promising for generating robust antibacterial, antifungal, and antiviral fabrics and surfaces.