Han, Hyeuk Jin Lee, Gyu Rac Han, Yujin Jang, Hanhwi Cho, Eugene N. Kim, Sunho Kim, Chang Sub Yim, Soonmin Jeong, Jae Won Kim, Jong Min Yu, Seunghee Tuller, Harry L. Jung, Yeon Sik 2024-01-19T12:32:54Z 2024-01-19T12:32:54Z 2022-01-25 2022-03 1616-301X https://pubs.kist.re.kr/handle/201004/115609 Despite improved sensitivity, simple downsizing of gas-sensing components to randomly arranged nanostructures often faces challenges associated with unpredictable electrical conduction pathways. In the present study, controlled fabrication of three-dimensional (3D) metal oxide nanowire networks is demonstrated that can greatly improve both signal stability and sensor response compared to random nanowire arrays. For example, the highest ever reported H2S gas response value, and a 5 times lower relative standard deviation of baseline resistance than that of random nanowires assemblies, are achieved with the ordered 3D nanowire network. Systematic engineering of 3D geometries and their modeling, utilizing equivalent circuit components, provide additional insights into the electrical conduction and gas-sensing response of 3D assemblies, revealing the critical importance of wire-to-wire junction points and their arrangement. These findings suggest new design rules for both enhanced performance and reliability of chemical sensors, which may also be extended to other devices based on nanoscale building blocks. English John Wiley & Sons Ltd. Modulation and Modeling of Three-Dimensional Nanowire Assemblies Targeting Gas Sensors with High Response and Reliability Article 10.1002/adfm.202108891 1 Advanced Functional Materials, v.32, no.10 Advanced Functional Materials 32 10 N scie scopus 000711746700001 2-s2.0-85117940286 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SELECTIVE DETECTION HYDROGEN-SULFIDE NANOPARTICLES NANOFIBERS DIAGNOSIS CATALYSTS ACETONE gas sensors metal oxides nanoarchitecture nano-transfer printing