한빛사논문
- 조회348
Inae Lee1,2, Jieun Kim3, Rhokyun Kwak3, and Joonseok Lee1,2*
1Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea
2Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul 04763, Republic of Korea
3Department of Mechanical Convergence Engineering, Hanyang University, Seoul 04763, Republic of Korea
CORRESPONDING AUTHOR : Joonseok Lee
Abstract
Bioaerosol contamination problems have led to the need for new technologies that effectively collect and inactivate airborne microorganisms. Typical nanomaterial-based filter membranes are usually sterilized using photocatalysts, electrical stimulation, and thermal treatment, which are expensive and require additional devices and cumbersome manufacturing. In this study, a membrane with nanotopographical features is manufactured via a catalyst droplet-based procedure to mechanically damage airborne bacteria. The catalyst droplets are used as templates for in situ novel puncturable nanopillar growth on the membrane surface. Numerical simulations and microscopic observations show that puncturable nanopillars with a thin and rough nano-edge are advantageous for rupturing the bacterial cell compared to flat nanopillars without a thin edge. A puncturable nanostructured air filter (PNAF) is compared to a bare air filter and exhibits higher bioaerosol collection efficiencies (>98% and 89.3–95.7%, respectively). PNAF is tested under breathing conditions as part of a face mask, where it effectively captures and deactivates E. coli aerosols through a mechano-bactericidal effect, resulting in the inhibition of bacterial proliferation and finally death. Thus, PNAF can be applied as an air purifier or face mask filter for bioaerosol collection presenting antibacterial effects without external stimulation.
논문정보
- Research article
- 2023년 03월 (BRIC 등록일 2023-05-18)
- 국내 연구진
- 바이오·의료융합 > 바이오센싱 및 나노바이오물질
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