Effects of surface roughness on hydrogen gas sensing properties of single Pd nanowires

Jun Min Lee, Wooyoung Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We report on the effects of surface roughness resulting from an ion milling technique on the hydrogen gas sensing performance of a single Pd nanowire grown by electrodeposition into nanochannels in anodized aluminum oxide templates. A combination of electron beam lithography and a lift-off process was utilized to fabricate four-terminal devices based on individual Pd nanowires. These results are the first demonstration of the effect of ion milling on the response time in a single Pd nanowire used as a hydrogen sensor. The response time of the single Pd nanowire surface-treated by ion milling was 20 times faster than that of a sample without surface treatment. The faster response time was due to the surface roughness effects of the surface treatment, an increase in the surface-to-volume ratio of the ion-milled nanowire.

Original languageEnglish
Pages (from-to)2151-2154
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Issue number3
Publication statusPublished - 2011 Mar

All Science Journal Classification (ASJC) codes

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


Dive into the research topics of 'Effects of surface roughness on hydrogen gas sensing properties of single Pd nanowires'. Together they form a unique fingerprint.

Cite this