Papers – Page 613 – TechConnect Briefs

Influence of structural forces and contact hysteresis on flow-induced aggregation and breakage of polymer nanoparticles

Moussa A.S., Ehrl L., Soos M., Lattuada M., Morbidelli M., ETH Zürich, CH

Static light scattering was used on-line to monitor the flow-induced aggregation of surfactant-free polystyrene latexes in a stirred tank. Various latexes with primary particles diameters ranging between 100 and 300 nm, different charge groups, different [...]

The Nanomechanical Testing and Characterisation of Anti-viral Nano-structured Surface Coatings

Singh I., Allan P.S., Brunel University, UK

Surface coatings of nanoparticles that possess antiviral properties have been tested by a nano scratch method for their adhesive strength to metallic and polymeric substrates. The deformed coatings were observed in an SEM and values [...]

Biopolymerization-Driven Self-Assembly of Nanofiber Air-Bridges

Pabba S., Fasciotto B.H., Yazdanapanah M.M., Dobrokhotov V.V., Cohn R.W., University of Louisville, US

Many proteins polymerize in vivo to form nanometer diameter fibers, including actin and fibrin. In this study we consider the application of filament-forming proteins to nanostructure fabrication. Specifically, protein fibers are induced to polymerize and [...]

Potential for Scaled-up Manufacture of Chitosan Nanoparticles Using the Spinning Disc Processor

Loh J.W., Lim L.Y., The University of Western Australia, AU

Spinning disc processing (SDP) is an innovative and robust continuous flow technology that has great potential for the scaled up production of nanoparticles. This study examined the feasibility of producing chitosan nanoparticles by SDP technology. [...]

Atom Transfer Radical Polymerization (ATRP) as a Tool for the Synthesis of Well-Defined Functional Polymeric Materials

Tsarevsky N.V., McCarthy P., Jakubowski W., Spanswick J., Matyjaszewski K., ATRP Solutions, Inc., US

ATRP is one of the most powerful synthetic techniques that allows the synthesis of polymeric materials with predetermined molecular weight, composition, and molecular architecture derived from substituted styrenes, (meth)acrylates, or acrylonitrile. The polymers prepared by [...]

Synthesis and Self-Assembly of Biodegradable Poly(ethylene oxide)-b-Polycaprolactone (PEO-b-PCL) Diblock Copolymers

Li G., Ghoroghchian P., Qi W., Christian N., Frail P.R., Hammer D.A., Therien M.J., Carestream Health Inc., US

A series of amphiphilic poly(ethylene oxide)-b-polycaprolactone (PEO-b-PCL) diblock copolymers with various PEO blocks (number-average molecular weight (Mn): 750~5800), PEO weight fraction (fPEO) from 7.7% to 33.3%, and Mn of the copolymers from 3.6k to 57k, [...]

The bijel: a bicontinuous interfacially jammed emulsion gel

White K.A., Herzig E.M., Schofield A.B., Poon W.C.K., Cates M.E., Clegg P.S., University of Edinburgh, UK

The bijel is a new class of functional material comprised of two simple fluids arrested in a bicontinuous configuration. We stabilize the fluid structure using an interfacial layer of silica particles. As with colloid-stabilized emulsions, [...]

Stimuli-Responsive Polymers in bioMEMS Devices

Montagne F., Popa A.M., Pugin R., Heinzelmann H., Swiss Center for Electronic and Microtechnic, CH

Due to their unique “switchable” properties, stimuli-responsive polymers have been attracting considerable attention in biotechnologies and successful applications have already been demonstrated in sensing, intelligent textiles, bio-separation and drug delivery systems. Development of responsive surfaces [...]

Iridium Oxide Nanowire Monitors for Protein Detection

Venkatraman V.L., Reddy R.K., Zhang F., Hsu V., Ulrich B., Prasad S., Portland State University, US

The overarching research objective is the development of a “point-of-care” immunoassay device based on iridium oxide nanowires for disease state identification to predict human health outcomes. This device is based on electrical detection of proteins [...]

Real-time detection of neurotransmitter using enzyme-immobilized CNT network transistors in 11 vessel occlusion rat model

Lee G.J., Lim J.E., Park H.J., Park H.K., Park J.H., Eo Y.H., Kim B.S., Park H.J., Park H.K., Park J.H., Choi S.K., Hong S., Park H.J., Park H.K., Park J.H., Kyung Hee University, KR

The field effect transistor (FET) made of carbon nanotube (CNT) can be used as sensor due to their extreme sensitivity to local chemical environments. Glutamate is the principal excitatory neurotransmitter in the brain, and its [...]