SPED: Self-Powered Electrochemical Device, POC Diagnostic
A paper-based diagnostic device that detects biomarkers and identifies infectious diseases by electrochemical analysis with reporting by changes in color is the result of research at Purdue University. Quoting directly: “The top layer of the SPED is fabricated using cellulose paper with patterned hydrophobic domains that delineate hydrophilic, wicking-based microfluidic channels for accurate colorimetric assays. The bottom layer is a triboelectric generator (TEG) fabricated on hydrophobic paper and capable of harvesting electric energy from the user’s touch. An inexpensive and rechargeable handheld potentiostat interfaced with the SPED enables accurate quantitative electrochemical detection of glucose, uric acid and l-lactate, parameters relevant to liver and kidney function, malnutrition, and anemia. The battery powering the potentiostat can be recharged using the TEG.” MORE WITH VIDEO
Image Credit: Purdue University photo/Aniket Pal