Nano-Sensors for Bio-Medical Applications


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Agarwal, A (2013) Nano-Sensors for Bio-Medical Applications. In: First National Conference on Recent Developments in Electronics ( NCRDE 2013), January 18-20, 2013, University of Delhi, New Delhi. (Submitted)

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Novel nano-dimensional materials, structures and devices are being created with the advent of nanotechnologies which find numerous applications in the fields like medicine, electronics, energy production, etc. With the increasing awareness, healthcare is particularly in focus that includes early diagnosis, drugs discovery, etc. For these bio-medical applications, specific and sensitive detection of various biological and chemical species becomes crucial. Among the various nano-materials realized, Nano-Gap and Nanowire based bio-chemical sensors are most exploited for the purpose. Nano-Gap sensors works on two principles; either on the ‘change of the conductivity’ of the sensing layers when exposed to analytes or based on ‘Electro-magnetic enhancement’ using micro Raman spectroscopy. Nanowire sensors work on the principle of ‘Field Effect Transistor’ (FET) where charges associated with the chemical or the biological species, are attached on the nanowire surface and acts as chemical or bio-gate; the devices are hence termed as CHEM-FET or BIOFET. The paper will present the nano-structured sensors platforms and demonstrate their bio-medical applications like DNA sensing for Single Nucleotide Polymorphisms (SNP) and Heterozygous SNPs detection; analysis of various ions like H+ (pH), alkali metal ions (Ca2+, Mg2+, Na+, K+)7; Cu2+, Zn2+; bio-electricity detection from cells and organs, etc. The process technologies used to realize such devices are reproducible and are suitable for mass production. Details will be discussed.

Item Type: Conference or Workshop Item (Speech)
Subjects: ?? TK ??
Semiconductor Devices > Sensors and Nanotechnology
Divisions: Semiconductor Devices
Depositing User: Mr. Rabin Chatterjee
Date Deposited: 23 May 2013 09:13
Last Modified: 23 May 2013 09:13

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