Abstract
Two-dimensional arrays of thermosensitive poly(N-isopropylacrylamide) colloids were formed by spin-coating. The addition of the surfactant sodium dodecylsulfate to bead suspensions led to the formation of a variety of ordered arrays. A mechanism explaining the final shape and bead density of the arrays is proposed, taking into account the interplay between the different interactions presented in the process, including depletion, capillary and electrostatic forces.
Original language | English (US) |
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Pages (from-to) | 1-7 |
Number of pages | 7 |
Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
Volume | 299 |
Issue number | 1-3 |
DOIs | |
State | Published - May 15 2007 |
Funding
We thank Dr. Guy Hagen for help in determining bead sizes. IS acknowledges support from the NSF of the US.
Keywords
- Array
- Beads
- Capillary forces
- Depletion forces
- PNIPAM
- Spin-coating
ASJC Scopus subject areas
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry