Homogenous spherical mosslike assembly of Pd nanoparticles by using DNA compaction: application of Pd-DNA hybrid materials to volume-expansion hydrogen switches

Yoshiharu Hatakeyama, Mitsuo Umetsu, Satoshi Ohara, Fumihiko Kawadai, Seiichi Takami, Takashi Naka, Tadafumi Adschiri

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Metal-DNA nanohybrid structures were prepared by using a combination of metallization and DNA compaction. he DNA were compacted using Pd(II) complexes and then reduced the Pd(II)-coordinated DNA strands to make a unique mosslike hybrid structure. The application of ascorbic acid as a reducing reagent promoted morphological homogeneity of the assembled Pd DNA hybrid materials. The current response, which depended on volume expansion in a cyclic atmosphere exchange, indicates the effectiveness of the DNA template for highly sensitive hydrogen sensors and switches with highly resistant break junctions. The current response of Pd-DNA clusters synthesized by using NaBH4 was also measured. The Pd-DNA clusters synthesized by using NaBH4showed a smaller current change and sensitivity for hydrogen than those by using ascorbic acids.

Original languageEnglish
Pages (from-to)1122-1128
Number of pages7
JournalAdvanced Materials
Volume20
Issue number6
DOIs
Publication statusPublished - 2008 Mar 18

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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