Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|Author(s):||Chang Xu; Tao Wu; Charles M. Drain; J Batteas; Michael J. Fasolka; Kathryn L. Beers;|
|Title:||Effect of Block Thickness on Solvent Response of Block Copolymer Brushes: A Combinatorial Study With Block Copolymer Brush Gradients|
|Published:||March 01, 2006|
|Abstract:||Block copolymer (BC) brush gradient libraries were explored as high-throughput platforms to study the effect of relative block thickness on the BC response to solvent. BC brushes of n-butyl methacrylate (BMA) and 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA) were synthesized via surface-initiated atom transfer radical polymerization (ATRP). The gradient libraries synthesized have uniform bottom BMA blocks and molecular mass gradient top blocks. The rearrangement of the BC brushes upon exposure to water and hexane was assessed by water contact angle (WCA) measurements. It is found that the solvent response behavior of the BC brushes is greatly influenced by their individual block thickness. While surface response properties can be suppressed by the extension of top block thickness, they are also enhanced by the increased bottom block thickness. In addition, our work suggests that BC brushes could be fabricated to provide tuneable surfaces with gradient responsive properties.|
|Volume:||39 No 9|
|Research Areas:||Combinatorial Methods, Polymers|
|PDF version:||Click here to retrieve PDF version of paper (125KB)|