The latest news from academia, regulators
research labs and other things of interest
Posted: Aug 23, 2017
Stretchable metallic nanoclusters for wearable electronics
(Nanowerk News) Researchers have fabricated highly deformable and stretchable conductors utilizing a Coil Flash Thermal Evaporation (CFTE) of gold nanoclusters that form robust thin metallic layers and maintain conductivity up to 200% on PDMS and 150% on textured rubber.
The CFTE method is known to produce gold nanoclusters with low ionization and kinetic energies, which minimizes carbonization of elastomers during deposition.
The CFTE-gold films on textured substrates are highly robust and perform significantly better than e-beam, sputtered and implanted electrodes and exhibit only a small increase in resistance with strain (25 Ω-sq-1 at 100% strain).
The films stretch and relax in a bellow type open-and-close mechanism which allow for a robust performance with cyclic straining.
The CFTE is a one-step low vacuum process (0.5 × 10-2 millibar), not requiring intensive fabrication setups and large processing durations associated with other vapor deposition based processes.
The authors point out that the facile nature of this process opens up possibilities for easy incorporation of these electrodes for various functionalities involving deformable electronics like textile electronics, biointerfacing of devices, lab-on-chip devices, robotics, and stretchable metallic interconnects.
"Low cost and high throughput should make it possible to easily facilitate the integration of this process into numerous industrial production lines and clean room fabrication setups for ubiquitous electronics," they conclude their report.