Integrated pH Sensors Based on RuO/GO Nanocomposites Fabricated Using the Aerosol Jet Printing Method.

An aerosol jet printing (AJP) process for depositing ruthenium dioxide (RuO) as a promising material for pH sensing is reported. Graphene oxide (GO) with a large surface area was used for the in situ sol-gel deposition of RuO nanoparticles on its surface. The cosolvent ratio and solid loading of the solution are adjusted to form a printable and stable ink.

Stimuli pH-responsive (N-vinyl imidazole-co-acryloylmorpholine) hydrogels; mesoporous and nanoporous scaffolds.

Tunable mesoporosity and nanoporosity of stimuli pH-responsive (N-vinyl imidazole-ran-acryloylmorpholine) hydrogels studied in terms of %swelling at various ionic strength, pH, temperature, and crosslinker concentration values were investigated. Hydrogel properties including diffusional exponent, number of links between two crosslinks, rms end-to-end distance and mesh size of gels were evaluated. The structural sequence of the scaffolds was tested and verified using Kelen-Tudos technique, and Alfrey-Price relationship.