nanotechnology-smart-materials-2018-posters

Page 115

Nano Research & Applications

ISSN 2471-9838

E u r o S c i C o n C o n f e r e n c e o n

Nanotechnology &

Smart Materials

O c t o b e r 0 4 - 0 6 , 2 0 1 8

Am s t e r d a m , N e t h e r l a n d s

Nanotechnology & Smart Materials 2018

Interfacial engineering in heterostructures and nanotechnology

for rapid prototyping of ethanol sensor

Priyanka Dwivedi, Saakshi Dhanekar and Samaresh Das

Centre for Applied Research in Electronics (CARE)-IIT Delhi, India

trace amount of human breath is a mixture of ethanol, pentane, acetone and other volatile compounds. These originate from

metabolic processes occurring in the organism, environmental exposure, dietary sources and alcohol intake. For example,

volatile organic compounds (VOCs) in human breath have already been linked to a condition of lung cancer, diabetes and other

diseases. Our interest is in the detection of ethanol vapours at sub ppm level to high level in human breath. The aim is to develop

an alcohol breath analyzer to be used by the common man. The device for this kind of application should be reliable, sensitive,

and operable at room temperature and easily complementary metal–oxide–semiconductor (CMOS) integrated. This paper

presents batch fabrication and rapid prototyping of selective ethanol sensor. The sensing mechanism is based on the interface

engineering of heterostructures. The sensing materials consist of TiO

and porous silicon (PS) and technique used is resistive

sensing. Sensing data was also collected from single layers like PS and TiO

. The limit of detection was in sub-ppm level and the

sensing response was repeatable and reproducible. The sensors operate at room temperature and were mounted onto transistor

outline (TO), dual in-line (DIP) packages. These devices can form a basis for development of breath alcohol analyzers to be used

by traffic policemen. This work highlights the significance of the interface formed between metal oxide and porous silicon and

how this can be formed into a prototype for a social cause.

Nano Res Appl Volume:4

DOI: 10.21767/2471-9838-C6-025