Feb 032011
 
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Ordinary cotton and polyester fabrics have been turned into batteries that retain their flexibility.

The demonstration is a boost to the nascent field of “wearable electronics” in which devices are integrated into clothing and textiles.

The approach is based on dipping fabrics in an “ink” of tiny tubes of carbon, and was first demonstrated last year on plain copier paper.

The new application to fabrics is reported in the journal Nano Letters.

“Wearable electronics represent a developing new class of materials… which allow for many applications and designs previously impossible with traditional electronics technologies,” the authors wrote.

A number of research efforts in recent years have shown the possibility of electronics that can be built on flexible and even transparent surfaces – leading to the often-touted “roll-up display”.

However, the integration of electronics into textiles has presented different challenges, in particular developing approaches that work with ordinary fabrics.

Now, Yi Cui and his team at Stanford University in the US has shown that their “ink” made of carbon nanotubes – cylinders of carbon just billionths of a metre across – can serve as a dye that can simply and cheaply turn a t-shirt into an “e-shirt”.

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