Researchers at the University of Pennsylvania and SPAWAR Systems in San Diego have developed a new method to fabricate large arrays of graphene field effect transistors that does not sacrifice the inherent electronic properties of the carbon material. The team then functionalized the transistors with mu receptors to make hybrid biosensor devices that can detect naltrexone (an opioid receptor antagonist used to treat alcohol dependence) at levels of 10 pg/mL – a value that is around 100 times lower than that obtained using current clinical diagnostic techniques……
http://nanotechweb.org/cws/article/tech/57264
