Archive for the ‘Videos’ Category

Dissolving electronics

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.

Read more @ http://www.nature.com/news/biodegradable-electronics-here-today-gone-tomorrow-1.11497


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Fifteen-year-old Jack Andraka recently won the world’s largest high school science competition for his development of a new, cheap and accurate test for detecting pancreatic cancer.
[Note: We want you to see these talks exactly as they happened! The archive footage might be a little rougher than the usual TED.com talk.]

June 26 , 2012

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Viviana Gradinaru, an assistant professor of biology at Caltech, discovered her passion for neuroscience as an undergraduate at Caltech, her alma mater. Viviana did her Ph.D. work with Karl Deisseroth at Stanford University where she played an instrumental role in the early development and applications of optogenetics, a research area concerned with the perturbation of neuronal activity via light-controlled ion channels and pumps. More information on her own lab at Caltech can be found at glab.caltech.edu. Viviana is also interested in entrepreneurship for better human health and has co-founded a company, Circuit Therapeutics, based on optogenetics.

In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)

On January 18, 2013, Caltech hosted TEDxCaltech: The Brain, a forward-looking celebration of humankind’s quest to understand the brain, by exploring the past, present and future of neuroscience. Visit TEDxCaltech.com for more details.

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This video shows the launch and swimming of a tissue-engineered jellyfish, or “Medusoid,” compared to real jellyfish, and the intermediate design steps. The construct is made from silicone rubber and powered by lab-grown heart tissue. Contraction of the Medusoid, at a frequency of 1-2Hz, can be triggered by external electrical field stimulation. The Medusoid was built in a proof-of-concept study at Caltech and Harvard for designing muscular pumps for biomedical application

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