Carbon Nanotube Network Detects DNA Without Labels

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Figure 1: A random network of carbon nanotubes lies between parallel metal electrodes on a silicon chip. The distance between the electrodes is 10 micrometers.
Figure 1: A random network of carbon nanotubes lies between parallel metal electrodes on a silicon chip. The distance between the electrodes is 10 micrometers.

Using a microchip device constructed with carbon nanotubes, researchers at the University of Pittsburgh and Nanomix, Inc., in Emeryville, CA, have developed a rapid method of detecting specific DNA sequences, including single-base mutations. The sensitivity of the new device is good enough to detect a single-base mutation in an amount of DNA present in one milliliter of blood.


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