Pd-promoted Ni-P electroless deposition on a hydrogen-bonded molecular surface of a supramolecular fibrous template

Daisuke Ishii, Taichi Nagashima, Mitsuru Udatsu, Ren De Sun, Yuuichi Ishikawa, Shinichi Kawasaki, Mitsuaki Yamada, Tomokazu Iyoda, Masaru Nakagawa

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A nickel-phosphorus (Ni-P) hollow microfiber was obtained by simply immersing a recyclable hydrogen-bonded supramolecular fibrous template made of amphoteric azopyridine carboxylic acid in an HCl-acidic PdCl2 aqueous solution and in a Ni-P electroless plating bath, followed by template removal in an alkaline aqueous solution. The Ni-P hollow microfiber had an inner pore diameter of 0.5 μm and a wall thickness of about 50 nm. The mechanism of the Pd-promoted Ni-P electroless deposition on the template surface was revealed by XPS analysis and TEM observation. Coordination of the [PdCl4] 2- species and its subsequent hydrolysis and condensation polymerization to a tubular Pd2+ nanosheet and formation of the Pd0 nanoparticle as plating catalyst were brought about on the molecular surface of successive head-to-tail COOH⋯NC5H 4 hydrogen bonds, which comprised the supramolecular fibrous template. The hydrogen-bonded surface ordered at a molecular level leading to the tubular Pd2+ nanosheet played an important role in homogeneous Pd-promoted Ni-P electroless deposition and allowed us to fabricate a uniform Ni-P hollow microfiber.

Original languageEnglish
Pages (from-to)2152-2158
Number of pages7
JournalChemistry of Materials
Volume18
Issue number8
DOIs
Publication statusPublished - 2006 Apr 18
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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    Ishii, D., Nagashima, T., Udatsu, M., Sun, R. D., Ishikawa, Y., Kawasaki, S., Yamada, M., Iyoda, T., & Nakagawa, M. (2006). Pd-promoted Ni-P electroless deposition on a hydrogen-bonded molecular surface of a supramolecular fibrous template. Chemistry of Materials, 18(8), 2152-2158. https://doi.org/10.1021/cm052050e