The selective adsorption of reagents is often essential for bioarray and lab-on-a-chip type devices. As the starting point for a bioarray, alkyl monolayer terminated silicon shards were photopatterned in a few nanoseconds with thousands of wells (spots) using an optical element, a microlens array. Polyallylamine (PAAm), a primary amine containing polymer, adsorbed with little selectivity to the...

The apparent diffusion coefficients, Dapp, and the release mechanisms of Aloin-doped poly(phenylene vinylene)/polyacrylamide hydrogels, Aloin-doped PPV/PAAM, were investigated. In the absence of an electric field (passive release), the diffusion of Aloin from the SA-doped PPV/PAAM hydrogel is delayed in the first 36 hr due to the ionic interaction between the anionic drug and PPV. Beyond this p...

Polyacrylamide (PAAm) hydrogels are commonly employed to ensure soil hydration in horticulture, but studies have shown that they have a minimal effect on crop life and quality. The reasons for this poor performance are not understood since the commercial hydrogels have not been adequately characterized. PAAm hydrogels were synthesized and their properties were measured along with those of comme...

To describe detailed behaviour of cell spreading under the influence of substrate stiffness, A549 cells cultured on the surfaces of polydimethylsiloxane (PDMS) and polyacrylamide (PAAm) with bulk rigidities ranging from 0.1 kPa to 40 kPa were in situ observed. The spreading behaviour of cells on PAAm presented a positive correlation between spreading speed and substrate stiffness. After computi...

Water-soluble fluorescent colloidal quantum dots (QDs) have been widely used in some biological and biomedical fields, so the interaction of QDs with biomolecules recently attracts increasing attention. In this paper, CdTe quantum dots modified by a natural biopolymer based on polyacrylamide (PAAm) grafted onto sodium alginate (Alg-g-PAAm) were synthesized in an aqueous solution. Then, the bind...

In marine environment, antifouling properties against marine sessile organisms(algae, sea squirts, barnacles, etc.) were tested on various kinds of hydrogels in a longterm. The results demonstrate that most hydrogels can ensure at least 2 months inmarine environment. In particular, mechanically tough PAMPS/PAAm DN and PVAgels exhibited amazing antifouling activity against ma...

A novel hydrophilic PAMPS-PAAm brush pattern is fabricated to selectively capture blood cells from whole blood. PAMPS brushes provide antifouling surfaces to resist protein and cell adhesion while PAAm brushes effectively entrap targeted proteins for site-specific and cell-type dependent capture of blood cells.

Here, we report the development of a new polyacrylamide (PAAm)/starch nanofibers' blend system and highlight its potential as substrate for efficient enzyme immobilization. PAAm was synthesized and blended with starch. The final blend was then electrospun into nanofibers. The response surface methodology was used to analyze the parameters that control nanofiber's diameter. Electrospun mat was t...

The hybrid hydrogel materials meet important social challenges, including the photocatalytic purification of water and bio-medical applications. Here, we demonstrate two scenarios polyacrylamide-TiO2 (PAAm@TiO2) composite design using calcium alginate (Alg-Ca) or Keplerate-type polyoxometalates (POMs) {Mo132} tuning polymer network structure. Calcium molding allowed us to produce polyacrylamide...

The purpose of the study was synthesis and physicochemical characterization spherical beads magnetically active composite ferrogels (FGs) with diameters 2–3 mm for further application to needs targeted drug delivery and/or replacement therapy. Spherical FGs based on a physical network calcium alginate (CaAlg), chemical polyacrylamide (PAAm), combined (PAAm/CaAlg) were analyzed. filled γ-Fe2O3 m...