Edge-Topological Regulation for in Situ Fabrication of Bridging Nanosensors

Jiangyang Liu, Hao Zeng, Guozhu Zhang, Wenjun Li, Kazuki Nagashima, Tsunaki Takahashi, Takuro Hosomi, Wataru Tanaka, Masaki Kanai, Takeshi Yanagida

Research output: Contribution to journalArticlepeer-review


In situ fabrication of well-defined bridging nanostructures is an interesting and unique approach to three-dimensionally design nanosensor structures, which are hardly attainable by other methods. Here, we demonstrate the significant effect of edge-Topological regulation on in situ fabrication of ZnO bridging nanosensors. When employing seed layers with a sharp edge, which is a well-defined structure in conventional lithography, the bridging angles and electrical resistances between two opposing electrodes were randomly distributed. The stochastic nature of bridging growth direction at the sharp edges inherently causes such unintentional variation of structural and electrical properties. We propose an edgeless seed layer structure using a two-layers resist method to solve the above uncontrollability of bridging nanosensors. Such bridging nanosensors not only substantially improved the uniformity of structural and electrical properties between two opposing electrodes but also significantly enhanced the sensing responses for NO2with the smaller variance and the lower limit of detection via in situ controlled electrical contacts.

Original languageEnglish
Pages (from-to)2569-2577
Number of pages9
JournalNano Letters
Issue number6
Publication statusPublished - Mar 23 2022

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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