Wireless Rehabilitation Training Sensor Arrays Made with Hot Screen-Imprinted Conductive Hydrogels with a Low Percolation Threshold.

Herein, we propose a highly sensitive wireless rehabilitation training ball with a piezoresistive sensor array for patients with Parkinson's disease (PD). The piezoresistive material is a low percolation threshold conductive hydrogel which is formed with polypyrrole (PPy) nanofibers (NFs) as a conductive filler derived from a polydopamine (PDA) template. The proton acid doping effect and molecular template of PDA are essential for endowing PPy NFs with a high aspect ratio, leading to a low percolation threshold (∼0.

[Study on the Raman Spectrum, Thermal Stability and UV-Vis Optical Absorption of Amorphous Peroxpolytungstic Acid].

Peroxpolytungstic acid (PPTA) is one of the important precursors to synthesize nanostructured tungsten oxides with the chemical routes. In this paper，PPTA sol, being prepared with H2O2, W and C2H5OH, was placed at room temperature for a long time till it was jellified naturally and then was dried at 120 ℃ for 3 hours for this investigation. Structures, thermal stability and optical UV-Vis absorption of the samples have been investigated by XRD, SEM, Raman, TG/DSC and UV-Vis spectrum, respectively.