Influence of the foundation layer on the layer-by-layer assembly of poly-L-lysine and poly(styrenesulfonate) and its usage in the fabrication of 3D microscale features.
The layer-by-layer (LBL) assembly of a polypeptide, poly-L-lysine (PLL), with poly(styrenesulfonate) sodium salt (PSS) on flat template-stripped gold (TSG) surfaces precoated with a self-assembled monolayer of alkanethiols terminated with positive (pyridinium), negative (carboxylic acid), and neutral [hexa(ethylene glycol)] groups is investigated. Both the topography and the rate of film thickness growth are found to be strongly dependent on the initial surface foundation layer. LBL assembly of PLL and PSS on patterned TSG surfaces produced by micro contact printing leads to structurally distinct microscale features, including pillars, ridges, and wells, whose height can be controlled with nanometer precision.
Nanoscience Centre, University of Cambridge, 11 J J Thomson Avenue, Cambridge CB3 0FF, UK.
Dejian
D
Zhou
Andreas
A
Bruckbauer
Matthew
M
Batchelor
Dae-Joon
DJ
Kang
Chris
C
Abell
David
D
Klenerman
D008567:Membranes, Artificial; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry; D010316:Particle Size; D011107:Polylysine / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry; D013499:Surface Properties
D008567:Membranes, Artificial; D011137:Polystyrenes; D011107:Polylysine; C003321:polystyrene sulfonic acid; D012964:Sodium