Role of the electric double layer in controlling the nucleation rate for tetragonal hen egg white lysozyme crystals by application of an external electric field

H. Koizumi, K. Fujiwara, S. Uda

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The nucleation rate of tetragonal hen egg white (HEW) lysozyme crystals could be increased or decreased via application of an ac electric field, which modifies the chemical potential of the liquid and solid states. The strength of an external electric field necessary to control the nucleation rate was calculated to be 104-105 V/cm, which was larger than that used experimentally by 2 or 3 orders of magnitude. This huge discrepancy could be understood by assuming the presence of a very large electric field sustained in the electric double layer (EDL) that forms at the interface between the dissimilar phases. By changing the frequency of an applied electric field of 800 V/cm in the range of 1-9 MHz, we were able to increase or decrease the nucleation rate. Specifically, the nucleation rate with an applied electric field increased with an increasing applied frequency up to 5 MHz and then significantly dropped above this value. The rapid decrease is considered to result from extinction of the EDL above 5 MHz.

Original languageEnglish
Pages (from-to)2591-2595
Number of pages5
JournalCrystal Growth and Design
Volume10
Issue number6
DOIs
Publication statusPublished - 2010 Jun 2

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Role of the electric double layer in controlling the nucleation rate for tetragonal hen egg white lysozyme crystals by application of an external electric field'. Together they form a unique fingerprint.

Cite this