الفهرس 
Suggested ProposalOnly 14 pages are availabe for public view
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Abstract
Biosensors are the devices in which there is a coupling of biological sensing element with a detector system using a transducer. They convert a biological response into an electrical signal. The term ’biosensor’ is often used to cover sensor devices used in order to determine the concentration of substances and other parameters of biological interest. In comparison with any other currently available diagnostic device, biosensors are much higher in performance in terms of sensitivity and selectivity both.The localized surface plasmon resonance (LSPR) property of metallic nanoparticles is widely exploited for chemical and biological sensing. This localized surface plasmon resonance (LSPR)is responsible for the bright color of the nanoparticle colloidal suspensions. selective biosensing of molecules using functionalized nanoparticles has become a major research interdisciplinary area between chemistry, biology and material science. Noble metals, especially gold (Au) and silver (Ag) nanoparticles, exhibit unique and tunable plasmonic properties; the control over these metal nanostructures size and shape allows manipulating their LSPR and their response to the local environment.