title: Micropatterning of proteins on nanospheres.
abstract: Currently micropatterning of proteins is mainly carried out on a planar substrate, which involves multi-step surface modifications directly on the substrate. Efficiency of chemical reactions is usually low, resulting in low signal-to-noise (S/N) ratio and poor repeatability of results. Here we presented a micropatterning method using polystyrene nanospheres with non-planar surface as a solid support for attaching proteins, which introduces many advantages. The patterning of proteins was carried out in two approaches: one was to dispense polystyrene nanospheres into an array of microwells and then attach proteins onto the nanospheres, and another was to coat polystyrene nanospheres with proteins first and then deposit the spheres into the microwells. For both approaches, a uniform pattern of proteins was generated. The amount of proteins attached via nanospheres was much higher than that on planar surface.
authors.affiliation: Division of Bioengineering, Faculty of Engineering, National University of Singapore, Singapore 117576, Singapore. biezy@nus.edu.sg
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D016650:Fluorescein-5-isothiocyanate; D005456:Fluorescent Dyes; D018625:Microscopy, Atomic Force; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry / Q000378:metabolism; D011485:Protein Binding; D011506:Proteins / Q000737:chemistry / Q000378:metabolism* / Q000648:ultrastructure; D012710:Serum Albumin, Bovine / Q000378:metabolism; D013499:Surface Properties
chemical_list: D005456:Fluorescent Dyes; D011137:Polystyrenes; D011506:Proteins; D012710:Serum Albumin, Bovine; D016650:Fluorescein-5-isothiocyanate