Transparent Air Filters with Active Thermal Sterilization.
Nano Lett
; 22(1): 524-532, 2022 01 12.
Article
in English
| MEDLINE | ID: covidwho-1475247
ABSTRACT
The worldwide proliferation of COVID-19 poses the urgent need for sterilizable and transparent air filters to inhibit virus transmission while retaining ease of communication. Here, we introduce copper nanowires to fabricate transparent and self-sterilizable air filters. Copper nanowire air filter (CNAF) allowed visible light penetration, thereby can exhibit facial expressions, helpful for better communication. CNAF effectively captured particulate matter (PM) by mechanical and electrostatic filtration mechanisms. The temperature of CNAF could be controlled by Joule-heating up to 100 °C with thermal stability. CNAF successfully inhibited the growth of E. coli because of the oligodynamic effect of copper. With heat sterilization, the antibacterial efficiency against G. anodireducens was greatly improved up to 99.3% within 10 min. CNAF showed high reusability with stable filtration efficiency and thermal antibacterial efficacy after five repeated uses. Our result suggests an alternative form of active antimicrobial air filter in preparation for the current and future pandemic situations.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Air Filters
/
COVID-19
Type of study:
Experimental Studies
Limits:
Humans
Language:
English
Journal:
Nano Lett
Year:
2022
Document Type:
Article
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