Electrically induced structure and ER effect of DNA particle suspensions

Keiji Minagawa, Atsushi Ogo, Hiroyuki Watanabe, Takeshi Mori, Masami Tanaka

Research output: Contribution to conferencePaper

Abstract

Electrorheological (ER) suspensions were prepared with three types of DNA particles. The DNA particles used were unpurified salmon testes DNA, DNA purified by a standard method, and a DNA/lipid complex. These particles, having the average diameter of 15-20 μm, were respectively dispersed in silicone oil (1000 cSt). It was found from viscosity measurements under a DC electric field ranging between 0 and 2 kV/mm that these suspensions show an ER effect. The increase of viscosity was larger for the suspension of purified DNA particles than those of the unpurified DNA and the DNA/lipid complex suspensions. The ER effect evaluated as relative enhancement of viscosity was large when the particle concentration was 20 wt%. Repeated application of an electric field resulted in stabilized reversible increase of viscosity in response to the field. Although the ER effect of the suspensions prepared with the DNA/lipid complex was not so large, the chemical modification of DNA can be utilized for preparation of various types of DNA-based particles for ER fluids.

Original languageEnglish
Pages3149-3150
Number of pages2
Publication statusPublished - Dec 1 2006
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: Sep 20 2006Sep 22 2006

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CountryJapan
CityToyama
Period9/20/069/22/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Electrically induced structure and ER effect of DNA particle suspensions'. Together they form a unique fingerprint.

  • Cite this

    Minagawa, K., Ogo, A., Watanabe, H., Mori, T., & Tanaka, M. (2006). Electrically induced structure and ER effect of DNA particle suspensions. 3149-3150. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.