Hi-tech pens
The University of California at San Diego has developed a hi-tech ballpoint pen.
Researchers have taken off-the-shelf ballpoint pens and filled them with bio inks. With so-called enzymatic-ink-based roller pens, users are able to draw biocatalytic sensors on a surface.
[caption id="attachment_18297" align="alignleft" width="300"] Researchers draw sensors capable of detecting...
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