The Layer-by-Layer (LbL) assembly

The Layer-by-Layer (LbL) assembly, also called Electrostatic Self Assembly Multilayer (ESAM), consists of the immersion of the substrate into alternate solutions with opposite electric charge [1]. This electrostatic attraction is the main force of adhesion to the surface of the substrate. It was discovered in 1966 although this technique went unnoticed until the nineties, when… Continue reading The Layer-by-Layer (LbL) assembly

Biomedical applications of electrospinning: drug delivery

Electrospinning technique offers numerous possibilities in drug delivery applications, by controlling the material (organic, inorganic, biodegradable or non-biodegradable‚Ķ), the delivered drug or the loading method. In this article, we present an overview of the drug delivery applications of electrospinning. Fiber materials: Biodegradable and non-biodegradable materials behave differently regarding drug release. Non-biodegradable materials release drug mainly… Continue reading Biomedical applications of electrospinning: drug delivery

Sol-gel coatings, a safe alternative to chrome plating

Since the beginning of the 20th century, hexavalent chromium derivates have been used to prevent corrosion and to improve the adherence of further coatings on zinc, magnesium, steel and aluminum alloys. Chromium (VI), or hexavalent chromium, is one of the most stable oxidation states of chromium. It very seldom occurs in nature and most hexavalent… Continue reading Sol-gel coatings, a safe alternative to chrome plating