Journal: Nature electronics
Article Title: Soft electronics based on particle engulfment printing
doi: 10.1038/s41928-024-01291-0
Figure Lengend Snippet: a , b , A printed wireless strain sensor mounted on the index finger: diagram ( a ) and photograph ( b ). The sensor resistance is wirelessly read out by NFC. PIP, proximal interphalangeal joint; MCP, metacarpophalangeal joint. c , Sensor resistance measured by a smartphone during bending of the index finger. Empty and solid red dots indicate joint is at the 0° and 90° state, respectively. d , e , A printed radio-frequency identification strain sensor mounted on the wrist: diagram ( d ) and photograph ( e ). f , Backscattering spectra measured by an antenna placed 1 m away during bending of the wrist from the 0° to the 90° state. g , h , A printed, fully stretchable, wireless sensor mounted on the elbow: diagram ( g ) and photograph ( h ). The sensor has three layers (Ag-microparticle electrode, BaTiO 3 -microparticle dielectric and Ag-microparticle antenna and electrode). i , Return loss spectra measured by an external inductor during bending of the elbow from the 0° to the 90° state.
Article Snippet: The NFC strain sensor node was composed of a flexible electronic circuit integrating NFC chipsets (RF430FRL152H, Texas Instruments) and a copper planar antenna (dimensions 10.4 × 11.9 mm, 0.127 mm track width, 0.254 mm gap and five turns) on a 13 × 13 mm printed circuit board, as well as a soft composite including stretchable conductive tracks and a strain sensor.
Techniques: