Study of two-component colloidal particles at air/water interfaces using Langmuir-Blodgett techniques

Brian Perea, Huan Ma, Lenore Dai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One and two-component colloidal particles, sulfate-treated polystyrene (S-PS), aldehyde-sulfate (AS-PS), and carboxylate-treated polystyrene particles (C-PS), were assembled at air/water interfaces by injecting particle dispersions. Surface pressure-area (π-A) isotherms were measured using the Langmuir-Blodgett technique. The isotherms for S-PS particles are reversible and independent of barrier speeds during the compression/relaxation cycles. The normalized isotherms of S-PS/AS-PS and S-PS/C-PS particle mixtures lie between those of single species. In addition, the self-assembled structures of particles were transferred onto mica substrates and characterized using a laser scanning confocal microscope. The morphology of the two-component layer has the characteristics of both single component layers with no significant phase separation. Finally, we have explored the potential applicability of a purely additive group contribution analysis to surface pressure-area isotherms.

Original languageEnglish (US)
Title of host publication10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings
StatePublished - Dec 1 2010
Event2010 AIChE Annual Meeting, 10AIChE - Salt Lake City, UT, United States
Duration: Nov 7 2010Nov 12 2010

Publication series

NameAIChE Annual Meeting, Conference Proceedings

Other

Other2010 AIChE Annual Meeting, 10AIChE
CountryUnited States
CitySalt Lake City, UT
Period11/7/1011/12/10

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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    Perea, B., Ma, H., & Dai, L. (2010). Study of two-component colloidal particles at air/water interfaces using Langmuir-Blodgett techniques. In 10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings (AIChE Annual Meeting, Conference Proceedings).