TY - GEN
T1 - Study of two-component colloidal particles at air/water interfaces using Langmuir-Blodgett techniques
AU - Perea, Brian
AU - Ma, Huan
AU - Dai, Lenore
PY - 2010/12/1
Y1 - 2010/12/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:78751493123
SN - 9780816910656
T3 - AIChE Annual Meeting, Conference Proceedings
BT - 10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings
T2 - 2010 AIChE Annual Meeting, 10AIChE
Y2 - 7 November 2010 through 12 November 2010
ER -