DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Jae Shin | ko |
dc.contributor.author | Seo, Min-Ho | ko |
dc.contributor.author | Choi, Kwang-Wook | ko |
dc.contributor.author | Yoo, Jae-Young | ko |
dc.contributor.author | Jo, Minseung | ko |
dc.contributor.author | Yoon, Jun-Bo | ko |
dc.date.accessioned | 2019-10-08T08:20:19Z | - |
dc.date.available | 2019-10-08T08:20:19Z | - |
dc.date.created | 2019-10-07 | - |
dc.date.created | 2019-10-07 | - |
dc.date.issued | 2019-09 | - |
dc.identifier.citation | NANOSCALE, v.11, no.35, pp.16317 - 16326 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.uri | http://hdl.handle.net/10203/267846 | - |
dc.description.abstract | Pd nanowire-based H-2 sensors have attracted significant attention because of their superior sensing performance. However, when exposed to H-2 concentrations of more than 2%, Pd experiences volume expansion over 10%, resulting in a significant amount of mechanical stress. Thus, exposure to such high H-2 concentrations causes physical destruction of Pd nanowires, such as breaks and peel-offs, leading to severe difficulty in the reliable detection of H-2 over a wide concentration range. Here, we proposed a structural approach to resolve this issue by introducing a partially anchored Pd nanowire (PA-PdNW) structure. In this configuration, most of the structure was air-suspended, leaving a small portion anchored to the substrate. Air-suspension enabled PA-PdNW to expand freely, thus relieving the mechanical stress; therefore, the Pd nanowires could withstand numerous exposures to high H-2 concentrations. To demonstrate the PA-PdNW structure, we developed a nano-fabrication method based on conventional semiconductor processes and successfully manufactured H-2 sensor devices with uniform, perfectly aligned PA-PdNW arrays stably air-suspended with designed gaps from the substrate. The fabricated sensors achieved reliable detection of H-2 in the 0.1%-3.9% concentration range with a significant resistance change. In addition, compared with fully anchored Pd nanowire (FA-PdNW) sensors, the PA-PdNW sensors showed superior durability, and the nanowires retained their initial structures even after 300 exposures to high H-2 concentrations. Furthermore, it was confirmed that the PA-PdNW sensor can stably operate even in extremely humid environments at 85% relative humidity. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Stress-engineered palladium nanowires for wide range (0.1%-3.9%) of H-2 detection with high durability | - |
dc.type | Article | - |
dc.identifier.wosid | 000485971900058 | - |
dc.identifier.scopusid | 2-s2.0-85072133480 | - |
dc.type.rims | ART | - |
dc.citation.volume | 11 | - |
dc.citation.issue | 35 | - |
dc.citation.beginningpage | 16317 | - |
dc.citation.endingpage | 16326 | - |
dc.citation.publicationname | NANOSCALE | - |
dc.identifier.doi | 10.1039/c9nr01975h | - |
dc.contributor.localauthor | Yoon, Jun-Bo | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | PD THIN-FILMS | - |
dc.subject.keywordPlus | HYDROGEN SENSOR | - |
dc.subject.keywordPlus | GAS | - |
dc.subject.keywordPlus | RELIABILITY | - |
dc.subject.keywordPlus | HUMIDITY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | SELECTIVITY | - |
dc.subject.keywordPlus | PRINCIPLES | - |
dc.subject.keywordPlus | STICTION | - |
dc.subject.keywordPlus | NANOGAPS | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.