Tattooing dates back to at least Neolithic times and has experienced a resurgence in popularity in many parts of the world in recent years. Advancements in tattoo pigments and the refinement of tattooing equipment has seen an improvement in the quality of tattoos being produced. Today it’s possible to get ink that glows under UV light, but a new technology could see tattoos that emit their own light. Researchers have been able to build thin, flexible silicon electronics on silk substrates that almost completely dissolve inside the body, paving the way for embedded LED tattoos that offer much more than just aesthetic appeal.

The devices are made of a thin film of silk on which silicon transistors about one millimeter long and 250 nanometers thick are placed. The silk holds the electronics in place and conforms to the biological tissue when implanted inside the body and wetted with saline. Unlike current electronic devices that need to be isolated from the body and are on rigid silicon, the silk substrates are completely broken down by the body into harmless by-products. And because they are just nanometers thick, the thin silicon circuits left behind don’t cause irritation.

Although the prospect of LED tattoos brings to mind science-fiction scenarios of gangs sporting futuristic illuminated designs that can be animated to move across a person’s body, the technology is being developed for medical applications such as photonic tattoos to show blood-sugar readings.

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Tags: illuminated designs, implantable silicon, LED tatoos, silicon electronics, silicon transistors

This entry was posted on Friday, November 13th, 2009 at 9:49 am and is filed under Cutting-edge Research, Innovation, Just Fun, gizmag. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.