Electrometer for repeated charge exchange measurements between a microparticle and a surface: Effect of water adsorption

L. M. Folan; S. Arnold; T. R. O'Keeffe; D. E. Spock; L. B. Schein; A. F. Diaz

doi:10.1016/0304-3886(90)90024-P

Electrometer for repeated charge exchange measurements between a microparticle and a surface: Effect of water adsorption

L. M. Folan, S. Arnold, T. R. O'Keeffe, D. E. Spock, L. B. Schein, A. F. Diaz

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Pages (from-to)	155-163
Number of pages	9
Journal	Journal of Electrostatics
Volume	25
Issue number	2
DOIs	https://doi.org/10.1016/0304-3886(90)90024-P
State	Published - Oct 1990

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biotechnology
Condensed Matter Physics
Surfaces, Coatings and Films
Electrical and Electronic Engineering

Access to Document

10.1016/0304-3886(90)90024-P

Cite this

@article{a740635df1d5467398a19897421fc0ab,

title = "Electrometer for repeated charge exchange measurements between a microparticle and a surface: Effect of water adsorption",

abstract = "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.",

author = "Folan, {L. M.} and S. Arnold and O'Keeffe, {T. R.} and Spock, {D. E.} and Schein, {L. B.} and Diaz, {A. F.}",

year = "1990",

month = oct,

doi = "10.1016/0304-3886(90)90024-P",

language = "English (US)",

volume = "25",

pages = "155--163",

journal = "Journal of Electrostatics",

issn = "0304-3886",

publisher = "Elsevier",

number = "2",

}

TY - JOUR

T1 - Electrometer for repeated charge exchange measurements between a microparticle and a surface

T2 - Effect of water adsorption

AU - Folan, L. M.

AU - Arnold, S.

AU - O'Keeffe, T. R.

AU - Spock, D. E.

AU - Schein, L. B.

AU - Diaz, A. F.

PY - 1990/10

Y1 - 1990/10

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0025495874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025495874&partnerID=8YFLogxK

U2 - 10.1016/0304-3886(90)90024-P

DO - 10.1016/0304-3886(90)90024-P

M3 - Article

AN - SCOPUS:0025495874

SN - 0304-3886

VL - 25

SP - 155

EP - 163

JO - Journal of Electrostatics

JF - Journal of Electrostatics

IS - 2

ER -

Electrometer for repeated charge exchange measurements between a microparticle and a surface: Effect of water adsorption

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this