Integration of living cells with novel microdevices requires the development of innovative technologies for manipulating cells. Chemical surface patterning has been proven as an effective method to control the attachment and growth of diverse cell populations. Patterning polyelectrolyte multilayers through the combination of layer-bylayer self-assembly technique and photolithography offers a si...

BackgroundOssification of the posterior atlantoaxial membrane (PAAM) is a rare cause spinal cord compression.Case presentationA 46-year-old woman with rheumatoid arthritis (RA) and 2-year history slowly progressive gait disturbance underwent surgery for right knee stiffness lower limb mild weakness. A neurologic examination revealed brisk deep tendon reflexes (DTR) spasticity in her four limbs....

A new hydrogel based on vinylsilane-chitosan and acrylamide was synthesized as VSi-CTS-g-PAAm used to remove methylene blue (MB) from aqueous solution using batch adsorption technique. The VSi-CTS-PAAm interacted with dye at different mass-liquid ratios, pH, temperature. amount of MB removal estimated a UV-Vis spectrophotometer an optical density λmax= 665 nm. most effective pH 12, about 98 % 5...

Remote-controlled nanocarriers for drug delivery are of great promise to provide timely, sensitive and spatiotemporally selective treatments for cancer therapy. Due to convenient and precise manipulation, deep penetration through tissues and excellent biocompatibility, near-infrared (NIR) irradiation is a preferred external stimulus for triggering the release of loaded drugs. In this work, for ...

Silicone rubber is a frequently employed biomaterial that is prone to bacterial adhesion and biofilm formation. In this study, the surface of silicone rubber was solvent-free functionalized by chemical vapor deposition (CVD) of poly(o-amino-p-xylylene-co-p-xylylene (amino-PPX). Subsequently, the amino groups of the amino-PPX layer were used to introduce the initiator from a vapor phase for atom...

The discovery of tough hydrogels of many chemical compositions, and their emerging applications in medicine, clothing, and engineering, has raised a fundamental question: How do hydrogels behave under many cycles of stretch? This paper initiates the study of the fatigue behavior of the classic PAMPS/PAAM double network hydrogels discovered by Gong and her co-workers (Advanced Materials 15, 1155...

Most existing magnetic hydrogels are weak and brittle. The development of strong and tough magnetic hydrogels would extend their applications into uncultivated areas, such as in actuators for soft machines and guided catheters for magnetic navigation systems, which is still a big challenge. Here a facile and versatile approach to fabricating highly stretchable, exceptionally tough and notch-ins...

Hexagonal boron nitride nanosheets (BNNSs) possess ultimate thermal and chemical stabilities and mechanical strengths. However, the unmodified BNNSs are hydrophobic and insoluble in water, which hinders their use in many technological areas requiring aqueous compatibility. In this work, h-BN was treated with molten citric acid to produce aqueous dispersible boron nitride sheets (ca-BNNSs). The ...

The synthesis and physicochemical properties of hydrogels with interpenetrated physical chemical networks were considered in relation to their prospective application as biomimetic materials biomedicine bioengineering. study was focused on combined based natural polysaccharide—calcium alginate (CaAlg) a synthetic polymer–polyacrylamide (PAAm). series varying proportions among polyacrylamide hav...

We report on the use of spectroscopic ellipsometry (SE) in predicting number density of nanoparticles bound to the surfaces decorated with either organic monolayers or surface-grafted polymers. Two systems are considered that comprise citrate-stabilized gold nanoparticles adsorbed on: (1) 3-aminopropyltriethoxysilane (APTES) self-assembled monolayer (SAM), and (2) surface-tethered polyacrylamid...