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Functionalized Surfaces (functionalized + surface)
Selected AbstractsMechanochemical Synthesis of Blue Luminescent Alkyl/Alkenyl-Passivated Silicon NanoparticlesADVANCED MATERIALS, Issue 22 2007S. Heintz A mechanochemical method for the simultaneous one-step production and functionalization of silicon nanoparticles is presented. Fresh surface created through mechanical attrition of the silicon during high energy ball milling (HEBM) allows for direct reaction between the silicon and the reactive alkene or alkyne media, resulting in a covalent linkage. The resulting nanoparticles exhibit strong blue luminescence, indicative of small nanoparticle sizes and a functionalized surface. [source] Positively Charged Material Surfaces Generated by Plasma Polymerized Allylamine Enhance Vinculin Mobility in Vital Human Osteoblastss,ADVANCED ENGINEERING MATERIALS, Issue 8 2010Henrike Rebl Abstract Several studies suggest that the modification of an implant surface by chemical means plays an important role in bone tissue engineering. Previously we have shown that osteoblast cell adhesion and spreading can strongly be increased by a positively charged surface. Cell adhesion and migration are two vital processes that are completely dependent on coordinated formation of focal adhesions. Changes in the organization of the actin cytoskeleton and the focal adhesions are essential for numerous cellular processes including cell motility and tissue morphogenesis. We examined the mobility of the cytoskeletally associated protein vinculin on functionalized surfaces using plasma polymerized allylamine (PPAAm), a homogenous plasma polymer layer with randomly distributed amino groups. In living, GFP,vinculin transfected osteoblastic cells we determined a significant increase in vinculin mobility and vinculin contact length on PPAAm compared to collagen I coated surfaces during the initial adhesion phase. We suggest that positive charges control the cell physiology which seems to be dominant over the integrin receptor binding to collagen I. The results emphasize the role of the surface charge for the design of artificial scaffolds in bone repair. [source] Multifunctional Integrated Platforms: Fabrication of Advanced Functional Devices Combining Soft Chemistry with X-ray Lithography in One Step (Adv. Mater.ADVANCED MATERIALS, Issue 48 200948/2009) Combining bottom-up sol,gel assembly with micro- and nanofabrication offers a simple and fast route to develop multifunctional integrated platforms, from microfluidics to microarrays, allowing the chemistry and geometry to be tailored to the application, as reported by Paolo Falcaro, Plinio Innocenzi, and co-workers on p. 4932. The inside cover illustrates different patterns of functionalized surfaces. The background is an example of highly controlled microfluidic interface fabricated combining deep X-rays lithography with sol,gel syntheses. [source] Directed Assembly of Polymer Blends Using Nanopatterned TemplatesADVANCED MATERIALS, Issue 7 2009Ming Wei The direct assembly of polymer blends on chemically functionalized surfaces is shown to produce a variety of nonuniform complex patterns. This method provides a powerful tool for easily producing nonuniform patterns in a rapid (30 s), one-step process with high specificity and selectivity for a variety of applications, such as nanolithography, polymeric optoelectronic devices, integrated circuits, and biosensors. [source] Localized "Click" Chemistry Through Dip-Pen Nanolithography,ADVANCED MATERIALS, Issue 24 2007A. Long Local reactions are triggered by delivering molecules from an AFM probe tip, allowing for direct modification of chemically functionalized surfaces. Silicon wafer-bound acetylene moieties readily undergo 1,3-dipolar cycloadddition with solution-phase azides delivered from an AFM tip. This selective and robust technique allows for the facile creation and placement of sub-micrometer-sized features. [source] | ||||||||||