Alternate layer-by-layer adsorption of single- and double-walled carbon nanotubes wrapped by functionalized β-1,3-glucan polysaccharides

Kouta Sugikawa, Munenori Numata, Kenji Kaneko, Kazuki Sada, Seiji Shinkai

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

A great deal of attention has been focused on exploiting novel methods to fabricate thin carbonaceous capsules from multiple components for advanced materials. A layer-by-layer (LbL) method is therefore being introduced to synthesize thin and multi-carbon nanotube (CNT)-based hollow capsules from CNT complexes with cationic or anionic complementarily functionalized β-1,3-glucans as building-blocks. These ionic β-1,3-glucans wrap around single-walled carbon nanotubes (SWNTs) and double-walled carbon nanotubes (DWNTs) to form water-soluble complexes with ionic groups on their exterior surface. Alternate self-assembly of these CNT complexes on the silica particles is demonstrated in solution by electrostatic interactions. The LbL adsorption processes were carefully monitored by ß-potential measurements, frequency shifts of a quartz crystal microbalance (QCM), and electron micrographs. Silica particles were then dissolved away by HF acid to obtain CNT-based hollow capsules composed of SWNTs and DWNTs. We believe that these novel surface adsorption methods are useful for potential design of CNT-based advanced functional materials.

Original languageEnglish
Pages (from-to)13270-13275
Number of pages6
JournalLangmuir
Volume24
Issue number23
DOIs
Publication statusPublished - Dec 2 2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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