ZHANG Chunyu, LIU Zhenghui, XU Gengzhao,CHEN Kebei, SONG Wentao, ZHONG Haijian, XU Ke

(Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China)

Abstract: In order to study the effect of ion concentration on particle size of ploystyrene microsphere in water dispersion medium,the average particle diameters of polystyrene microsphere dispersed in four different purity water samples were analyzed. The changes of the particle sizes with various salt contents were also studied with ultrapure water as blank solvent. The resistivity of ultrapure water was more than 18 MΩ·cm. The results show that thick hydration layers will be formed on the surfaces of polystyrene particles in the ultrapure water to increase the measured values of the particle sizes, and the hydration film thickness can be collapsed or compressed by adding a small amount of ion to improve the measurement accuracy, thereby it can realize the verification of particle size measuring instrument with standard sample. Moreover, it is of advantage to choose the concentrations of NaCl or KCl solutions during the tests of the average particle diameters.

Keywords: average particle diameter; dispersion medium; ion concentration; hydration film

中图分类号：O69                                文献标志码：A

文章编号：1008-5548(2019)04-0055-06

DOI:10.13732/j.issn.1008-5548.2019.04.008

收稿日期： 2019-01-31，修回日期：2019-03-14，在线出版时间：2019-04-22 16:23。

基金项目：国家自然科学基金项目，编号：6167030722。

第一作者简介：张春玉(1991—)，女，硕士研究生，研究方向为化学工程与技术。E-mail：cyzhang2016@sinano.ac.cn。

通信作者简介：

钟海舰(1978—)，男，博士，高级工程师，硕士生导师，研究方向为微电子学与固体电子学。E-mail：hjzhong2007@sinano.ac.cn。

徐科(1970—)，男，博士，研究员，博士生导师，研究方向为微电子学与固体电子学。E-mail：kxu2006@sinano.ac.cn。