Kim, Moon-Ju Song, Zhiquan Lee, Chang Kyu Yun, Tae Gyeong Noh, Joo-Yoon Park, Mi-Kyung Yong, Dongeun Kang, Min-Jung Pyun, Jae-Chul 2024-01-19T10:31:41Z 2024-01-19T10:31:41Z 2022-12-09 2023-01 1613-6810 https://pubs.kist.re.kr/handle/201004/114177 Rapid spread of infectious diseases is a global threat and has an adverse impact on human health, livelihood, and economic stability, as manifested in the ongoing coronavirus disease 2019 (COVID-19) pandemic. Even though people wear a face mask as protective equipment, direct disinfection of the pathogens is barely feasible, which thereby urges the development of biocidal agents. Meanwhile, repetitive respiration generates temperature variation wherein the heat is regrettably wasted. Herein, a biocidal ZnO nanorod-modified paper (ZNR-paper) composite that is 1) integrated on a face mask, 2) harvests waste breathing-driven thermal energy, 3) facilitates the pyrocatalytic production of reactive oxygen species (ROS), and ultimately 4) exhibits antibacterial and antiviral performance is proposed. Furthermore, in situ generated compressive/tensile strain of the composite by being attached to a curved mask is investigated for high pyroelectricity. The anisotropic ZNR distortion in the bent composite is verified with changes in Zn-O bond lengths and O-Zn-O bond angles in a ZnO4 tetrahedron, resulting in an increased polarization state and possibly contributing to the following pyroelectricity. The enhanced pyroelectric behavior is demonstrated by efficient ROS production and notable bioprotection. This study exploring the pre-strain effect on the pyroelectricity of ZNR-paper might provide new insights into the piezo-/pyroelectric material-based applications. English Wiley - V C H Verlag GmbbH & Co. Breathing-Driven Self-Powered Pyroelectric ZnO Integrated Face Mask for Bioprotection Article 10.1002/smll.202200712 1 Small, v.19, no.2 Small 19 2 N scie scopus 000888415100001 2-s2.0-85142299019 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article THIN-FILMS NANOGENERATORS CHITOSAN ENERGY PIEZOELECTRICITY DISINFECTION MECHANISMS GENERATION ORIGIN OXYGEN antibacterial activity antiviral activity human breathing pre-strain effect pyrocatalytic processes self-powered pyroelectric devices ZnO nanorod-modified paper composites