ELECTROMETER FOR REPEATED CHARGE-EXCHANGE MEASUREMENTS BETWEEN A MICROPARTICLE AND A SURFACE - EFFECT OF WATER-ADSORPTION

被引：17

作者：

FOLAN, LM

ARNOLD, S

OKEEFFE, TR

SPOCK, DE

机构：

[1] Microparticle Photophysics Laboratory (MP3L), Department of Physics, Polytechnic University, Brooklyn, NY 11201

[2] IBM Research Division, Almaden Research Center, San Jose, CA 95120

来源：

JOURNAL OF ELECTROSTATICS | 1990年 / 25卷 / 02期

关键词：

D O I：

10.1016/0304-3886(90)90024-P

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report a new electrometer which allows the study of contact charging between a single microparticle and a metal surface. The electrometer is based on an electrodynamic levitator-trap and has a leakage current of about 10-23 A. The electrometer is applied to the study of the contact charging of spherical polystyrene-divinyl benzene copolymer particles against a Ni surface under ambient and a "dry" N2 atmosphere. Significantly reduced charge exchange after eliminating water molecules from the particle would be strong evidence for an ionic charge exchange mechanism. Through a combination of gravimetric and light scattering measurements we have determined both the amount of water accreted in a humid atmosphere and the maximum amount of water that could be on the surface of the particle. Our experiments indicate approximately constant charging, independent of the amount of water on the particle. © 1990.

引用

页码：155 / 163

页数：9

共 14 条

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