Presentation74,75
Presentation 74
Putting Copper To Action : Endowing Products With Potent Biocidal Properties
Dr.Gadi Borkow
Cupron Inc
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A platform technology has been developed in which copper oxide is impregnated or plated into polymeric fibers or cotton fibres, respectively, endowing the fibers with potent broad-spectrum anti-bacterial, anti-viral, anti-fungal and anti-mite properties (FASEB Journal 2004,18:1728-30). This durable platform technology introduces copper oxide-treated fibers and enables the mass production of woven and non@Woven fabrics with no requirement for alteration of industrial procedures ormachinery.
This technology facilitates the production of anti-viral gloves and filters (which deactivate HIV-1 and other viruses); anti-bacterial self-sterilizing fabrics (which kill antibiotic resistant bacteria, including MRSA and VRE); anti-fungal socks (which alleviate symptoms of athlete's foot); anti-dust mite mattress-covers (which reduce mite-related allergies) and gauze (which is highly effective in promoting skin regeneration, closure of chronic wounds and the alleviation of bed sores). The paper will demonstrate the potential use of copper in new applications that address medical issues of the greatest importance, such as viral transmissions; nosocomial infections; wound healing and the spread of antibiotic resistant bacteria.
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Presentation75
Wettaibility Engineering Of Solid State Materials: Applications In Biotechnology, MEMS And Omems
Prof. Daniel Aronov
Gil Rosenman and Daniel Aronov Department of Physical Electronics, School of Electrical Engineering, Tel Aviv University
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We propose a new way [*] for modification of hydrophilic/hydrophobic properties of solid state materials with nanoscale resolution by modulation of surface electric potential due to dynamically varied and controlled electron/hole charge located near the surface. This charge is injected by low energy electron beam and trapped at the surface and bulk states. The electron-induced wettability modulation method allows both flexible homogenous wettability tuning and high-resolution wettability patterning as well reversible switching from hydrophilic/hydrophobic to hydrophobic/hydrophilic state of the material in a wide range of contact angles from 5 to 110 degrees with accuracy around 5 degrees.
The method was successfully applied to various solid state materials including biomimetic materials, silicon-based materials (silicon nitride, silicon oxide thin films, and Si-nanodots), polymers, alumina, and various metals, which are always coated by thin oxide or dielectric films. Tailoring gradually varied wettability state in the hydroxyapatite nanoceramics enabled the differential binding of biological materials with different surface properties, such as bovine serum albumin (BSA), deoxyribonucleic acid (DNA), selective immobilization of some sorts of bacteria such as gram-positive Bacillus subtilis, gram-negative Escherichia coli and Pseudomonas putida bacteria (in cooperation with Prof. E.Z. Ron) as well fabrication of microchannels and patterned materials crystallization on Si-based substrates.
Rosenman, G, Aronov, D, and Dekhtyar, Yu. PCT Patent (2005).
