Transistors tune in: The chromogranin A (CgA) released from the synaptic terminal of cortical neurons can be detected in situ by immobilization of an antibody against CgA on a single-walled carbon-nanotube field-effect transistor (see picture), to give a device with high selectivity, sensitivity, and real-time detection capability. This biosensory technique can be used to study the activity of individual living neurons.
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Wang et al. (2007) studied this question.
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