News Column

Recent Studies from National Taiwan University Add New Data to Colloid and Interface Science

June 6, 2014

By a News Reporter-Staff News Editor at Science Letter -- New research on Science is the subject of a report. According to news reporting out of Taipei, Taiwan, by NewsRx editors, research stated, "The electrophoresis of a pH-regulated, zwittterionic nanoparticle, taking account of its self-induced nonuniform surface charge, the presence of multiple ionic species, and the effect of double-layer polarization, is modeled. This extends previous models to a case closer to reality because the charged properties of a particle can be influenced by both its physicochemical nature and the solution conditions."

Our news journalists obtained a quote from the research from National Taiwan University, "We show that the nonuniform surface charge distribution induces a local electric field having the direction either opposite to or the same as that of the applied electric field, thereby either reducing or raising the particle velocity. This effect is most important when both the surface potential and the degree of nonuniformality are high. The competition of the effects of the position dependent double layer thickness, the surface proton distribution, and the double-layer polarization yields complicated and interesting behaviors."

According to the news editors, the research concluded: "Depending upon the level of pH, the influence of the types of background salt on the particle mobility can be significant."

For more information on this research see: Electrophoresis of pH-regulated, zwitterionic particles: effect of self-induced nonuniform surface charge. Journal of Colloid and Interface Science, 2014;421():154-9. (Elsevier -; Journal of Colloid and Interface Science -

Our news journalists report that additional information may be obtained by contacting Y.Y. Chen, Dept. of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan. Additional authors for this research include J.P. Hsu and S. Tseng (see also Science).

Keywords for this news article include: Asia, Taipei, Taiwan, Science.

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Source: Science Letter

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