title: Adsorption/desorption of mono- and diblock copolymers on surfaces using specific hydrogen bonding interactions.
abstract: Diblock copolymers containing recognition units designed to participate in specific three-point hydrogen bonding were adsorbed onto modified gold surfaces. Self-assembled monolayers (SAMs) containing complementary recognition units were used to direct the adsorption process. The polymer-modified surfaces obtained were characterized using X-ray photoelectron spectroscopy, water contact angle, and ellipsometry. The role of individual block lengths on the adsorption process was followed by observing frequency changes of thymine-SAM-modified quartz crystal microbalance chips during adsorption of diamidopyridine-functionalized polymers from a nonpolar solvent. The renewable nature of these recognition unit functionalized surfaces was demonstrated by reversible binding of polymers. Adsorption onto fresh surfaces, followed by desorption and subsequent readsorption of monoblock and diblock copolymers was also investigated.
authors.affiliation: Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA.
authors.forename: Amitav
authors.initials: A
authors.lastname: Sanyal
authors.forename: Tyler B
authors.initials: TB
authors.lastname: Norsten
authors.forename: Oktay
authors.initials: O
authors.lastname: Uzun
authors.forename: Vincent M
authors.initials: VM
authors.lastname: Rotello
mesh_terms: D000327:Adsorption; D006046:Gold / Q000737:chemistry; D006860:Hydrogen Bonding; D008567:Membranes, Artificial; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry; D011791:Quartz / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D013941:Thymine / Q000737:chemistry
chemical_list: D008567:Membranes, Artificial; D011108:Polymers; D011137:Polystyrenes; D011725:Pyridines; D012997:Solvents; D011791:Quartz; D006046:Gold; D013941:Thymine