TY - JOUR
T1 - Study of two-component colloidal particles at air/water interfaces using Langmuir-Blodgett techniques
AU - Ma, Huan
AU - Perea, Brian
AU - Dai, Lenore
N1 - Funding Information:
We thank Professor Jerry Lin for the instrument usage. We are also grateful to the financial support from the National Science Foundation Grant # 0922277 and the Arizona State University FURI program.
PY - 2010/12/3
Y1 - 2010/12/3
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.
KW - Air/water interfaces
KW - Langmuir-Blodgett techniques
KW - Two-component colloidal particles
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U2 - 10.1016/j.colsurfa.2010.09.035
DO - 10.1016/j.colsurfa.2010.09.035
M3 - Article
AN - SCOPUS:78649450878
SN - 0927-7757
VL - 372
SP - 61
EP - 65
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -