Altering Surface Charge Nonuniformity on Individual Colloidal Particles

Jason D. Feick, Nkiru Chukwumah, Alexandra E. Noel, Darrell Velegol

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Charge nonuniformity (σζ) was altered on individual polystyrene latex particles and measured using the novel experimental technique of rotational electrpphoresis. It has recently been shown that unaltered sulfated latices often have significant charge nonuniformity (σζ = 100 mV) on individual particles. Here it is shown that anionic polyelectrolytes and surfactants reduce the native charge nonuniformity on negatively charged particles by 80% (σζ = 20 mV), even while leaving the average surface charge density almost unchanged. Reduction of charge uniformity occurs as large domains of nonuniformity are minimized, giving a more random distribution of charge on individual particle surfaces. Targeted reduction of charge nonuniformity opens new opportunities for the dispersion of nanoparticles and the oriented assembly of particles.

Original languageEnglish (US)
Pages (from-to)3090-3095
Number of pages6
JournalLangmuir
Volume20
Issue number8
StatePublished - Apr 13 2004

Fingerprint

Surface charge
Latexes
nonuniformity
Latex
Charged particles
Charge density
Polyelectrolytes
Surface-Active Agents
Particles (particulate matter)
Polystyrenes
latex
Surface active agents
Nanoparticles
statistical distributions
polystyrene
charged particles
assembly
surfactants
nanoparticles
styrofoam

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Feick, J. D., Chukwumah, N., Noel, A. E., & Velegol, D. (2004). Altering Surface Charge Nonuniformity on Individual Colloidal Particles. Langmuir, 20(8), 3090-3095.
Feick, Jason D. ; Chukwumah, Nkiru ; Noel, Alexandra E. ; Velegol, Darrell. / Altering Surface Charge Nonuniformity on Individual Colloidal Particles. In: Langmuir. 2004 ; Vol. 20, No. 8. pp. 3090-3095.
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Feick, JD, Chukwumah, N, Noel, AE & Velegol, D 2004, 'Altering Surface Charge Nonuniformity on Individual Colloidal Particles', Langmuir, vol. 20, no. 8, pp. 3090-3095.

Altering Surface Charge Nonuniformity on Individual Colloidal Particles. / Feick, Jason D.; Chukwumah, Nkiru; Noel, Alexandra E.; Velegol, Darrell.

In: Langmuir, Vol. 20, No. 8, 13.04.2004, p. 3090-3095.

Research output: Contribution to journalArticle

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Feick JD, Chukwumah N, Noel AE, Velegol D. Altering Surface Charge Nonuniformity on Individual Colloidal Particles. Langmuir. 2004 Apr 13;20(8):3090-3095.