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Nanobiosensors
8.1 Introduction
The term “biosensor” once referred broadly to any device that responds to
chemical species in biological samples or any device meant for biological
applications or using biological components. But the denition now is more
restricted and sharply focused. A biosensor is a device for the detection of an
analyte that combines a biological component with a physicochemical detec-
tor. Then simply downscaling the biosensor, a nanobiosensor is a biosensor
on the nanoscale size (Khanna 2008).
However, non-scalable parameters ought to be remembered.
Figure 8.1 illustrates the components of a nanobiosensor ...