Applied Physics

Get IT Down on Paper

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Science  05 Dec 2008:
Vol. 322, Issue 5907, pp. 1437
DOI: 10.1126/science.322.5907.1437b

A few years ago, when you wanted to remember something, the standard thing to do was to jot it down on a piece of paper. Now you might tend to note it in some kind of electronic storage device. At the heart of these storage devices is microelectronic circuitry, with billions of transistors carved out of silicon to do the processing and memory elements that store the information either magnetically or electrically. Martins et al. take the process full circle by fabricating electronic transistors and storage elements using paper as the substrate and the dielectric layer within the traditional transistor design. Using multilayer compact natural cellulose fibers, embedded in a mix of ionic resin and adhesive glue to provide mechanical stability, they fabricate transistors with respectable carrier mobilities on the order of 40 cm2/Vċs. Moreover, when the transistors are switched off, they can retain their memory for more than 14,000 hours because of charge storage effects within the paper dielectric. This demonstration is encouraging for the further development of lightweight and cheap electronic technology. — ISO

Appl. Phys. Lett. 93, 203501 (2008).

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