Electrical switching based on dimensionality transitions in nanostructured polymers

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • University of Helsinki
  • VTT Technical Research Centre of Finland
  • University of Groningen

Abstract

Supramolecular hierarchical conducting nanostructures are obtained by complexing amphiphilic oligomers with block copolymers. Nominally each pyridine group of poly(styrene)-block-poly(4-vinyl pyridine), i.e. (PS-block-P4VP), is first protonated by methane sulphonic acid (MSA) to yield PS-block-P4VP(MSA)1.0. It is further hydrogen bonded with stoichiometric amount of pentadecyl phenol (PDP) to form PS-block-P4VP(MSA)1.0(PDP)1.0. The polyelectrolytic domains are subject to reversible phase transitions from 'semi 1d' slabs to 2d lamellae and further to 1d cylinders upon heating. The transitions manifest in the thermally activated conductivity. Extension to conjugated polymers is discussed to achieved temperature controlled switching based on electronic conductivity.

Details

Original languageEnglish
Pages (from-to)1498-1501
Number of pages4
JournalSynthetic Metals
Volume102
Issue number1-3
Publication statusPublished - Jun 1999
MoE publication typeA1 Journal article-refereed

    Research areas

  • functional materials, nanostructures, polymers, self-organization, supramolecular concepts

ID: 4706112