Strain Sensor Based on Biological Nanomaterial

We investigated a prototype of strain sensor based on the layers bionanomaterial containing bovine serum albumin (BSA matrix) and multi-walled carbon nanotubes (MWCNT filler). The aqueous dispersion 25 wt.% BSA/0.3 MWCNT was applied by screen printing onto flexible polyethylene terephthalate substrates. After drying laser irradiation (~970 nm), various parameters were controlled, i.e., resistance R, bending angle θ, number cycles n, measurement time. One cycle corresponded to change within range θ = ±150°. BSA/MWCNT had dimensions (15 ÷ 20) mm × (8 10) (0.5 1. 5) µm. dependences R similar for all at ±30, R(θ) curves represented approximate linear (with an error ≤ 10%); beyond this range, became nonlinear. following quantitative values obtained sensor: specific conductivity ~1 10 S/m, sensitivity ~160, 1.0 1.5%/°. These results are high. examined as particular interest medical practice. In particular, sensors can be implemented applying water nanomaterials human skin using 3D printer monitoring movements (arms blinking) detection signs pathology (dysphagia, respiratory diseases, angina, etc.).