29-03-2011, 04:52 PM
Presented by:
Saurav Saha
[attachment=11283]
Introduction to Nanosensors
Sensors: Instrument responds to physical stimulus, collects and measures data regarding some property of a phenomenon, object or material and Converting into a measurable quantity by data acquisition system
Extremely small device capable of detecting and responding to physical stimuli with dimensions of 1 billionth of a meter, with its ability to sense the properties of environmental conditions at very small and gaseous levels
Salient Features…
Higher strength
Decreased sensors dimensions (sensing films)
Increased of surface area
Reduced detection time (Shorter response time)
Designing with new properties absent in original bulky-macroscopic versions.
Types:
Physical nanosensors : Nanotube & nanoribbon, used to measure magnitude such as mass, pressure, force, or displacement.
Biological nanosensors : Composed of (i) biological recognition system or bioreceptor, (ii) transduction mechanism, e.g., an electrochemical detector, an optical transducer etc.
Used to monitor biomolecular processes i.e. antibody/ antigen interaction, DNA interactions, enzymatic interactions or cellular communication processes.
