Video: A transient electronic circuit is dissolved by falling droplets of water.
– Vanishing Electronic Medical Implants
– Biodegradable electronics here today, gone tomorrow
Dissolvable electronic materials could be used in medical implants and environmentally friendly gadgets.
Nature 27 September 2012 doi:10.1038/nature.2012.11497
1.Hwang, S.-W. et al. Science 337, 1640–1644 (2012).
A Physically Transient Form of Silicon Electronics
Science 28 September 2012: Vol. 337 no. 6102 pp. 1640-1644 DOI: 10.1126/science.1226325
A remarkable feature of modern silicon electronics is its ability to remain physically invariant, almost indefinitely for practical purposes. Although this characteristic is a hallmark of applications of integrated circuits that exist today, there might be opportunities for systems that offer the opposite behavior, such as implantable devices that function for medically useful time frames but then completely disappear via resorption by the body. We report a set of materials, manufacturing schemes, device components, and theoretical design tools for a silicon-based complementary metal oxide semiconductor (CMOS) technology that has this type of transient behavior, together with integrated sensors, actuators, power supply systems, and wireless control strategies. An implantable transient device that acts as a programmable nonantibiotic bacteriocide provides a system-level example.
2.Kim, D.-H. et al. Appl. Phys. Lett. 95, 133701 (2009).
Silicon electronics on silk as a path to bioresorbable, implantable devices
Appl. Phys. Lett. 95, 133701 (2009);
Many existing and envisioned classes of implantable biomedical devices require high performance electronics/sensors. An approach that avoids some of the longer term challenges in biocompatibility involves a construction in which some parts or all of the system resorbs in the body over time. This paper describes strategies for integrating single crystalline silicon electronics, where the silicon is in the form of nanomembranes, onto water soluble and biocompatible silk substrates. Electrical, bending, water dissolution, and animal toxicity studies suggest that this approach might provide many opportunities for future biomedical devices and clinical applications.
Electronics that dissolve in water could be used for medical implants and for biodegradable gadgets.