title: Transfer-printing and host-guest properties of 3D supramolecular particle structures.
abstract: Mechanically robust and crystalline supramolecular particle structures have been constructed by decoupling nanoparticle assembly and supramolecular glue infiltration into a sequential process. First, beta-cyclodextrin (CD)-functionalized polystyrene particles (d approximately 500 nm) were assembled on a CD-functionalized surface via convective assembly to form highly ordered, but mechanically unstable, particle crystals. Subsequently, the crystals were infiltrated by a solution of adamantyl-functionalized dendrimers, functioning as a supramolecular glue to bind neighboring particles together and to couple the entire particle crystal to the CD surface, both in a noncovalent manner. The supramolecular particle crystals are highly robust, as witnessed by their ability to withstand agitation by ultrasonication. When assembled on a poly(dimethylsiloxane) (PDMS) stamp, the dendrimer-infiltrated particle crystals could be transfer-printed onto a CD-functionalized target surface. By variation of the geometry and size of the PDMS stamps, single particle lines, interconnected particle rings, and V-shaped particle assemblies were obtained. The particle structures served as 3D receptors for the binding of (multiple) complementary guest molecules, indicating that the supramolecular host functionalities of the particle crystals were retained throughout the fabrication process.
authors.affiliation: Molecular Nanofabrication Group and Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Xing Yi
authors.initials: XY
authors.lastname: Ling
authors.forename: In Yee
authors.initials: IY
authors.lastname: Phang
authors.forename: David N
authors.initials: DN
authors.lastname: Reinhoudt
authors.forename: G Julius
authors.initials: GJ
authors.lastname: Vancso
authors.forename: Jurriaan
authors.initials: J
authors.lastname: Huskens
mesh_terms: D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D011137:Polystyrenes / Q000737:chemistry*; D013499:Surface Properties; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D020099:Coated Materials, Biocompatible; D046911:Macromolecular Substances; D011137:Polystyrenes; D047392:beta-Cyclodextrins; C031215:betadex