Other

Indian Institute of Technology Bombay

Nanosniff Technologies Pvt. Ltd.

V Ramgopal Rao

Maryam Shojaei Baghini

Hrishikesh R Desai

Kapil Bardeja

Tapanendu Kundu

Nitin S Kale

Sachin Sangave

Sangita Chaki Roy

Soumyo Mukherji

Rajesh A Thakker

Nehul Gullaiya

Mahesh B Patil

Deepali Chandratre

Dinesh K Sharma

Hrishikesh Desai

Mayank Srivastava

An explosive detection system for detecting explosive trace in a sample includes a detection unit, and a processing unit. The detection unit that receives a desorbed sample includes a first heater, a second heater, a first resistance temperature detector (RTD), a second RTD, and an amplifier. The first heater is exposed to the desorbed sample. The first heater and the second heater are supplied with specific voltage for three or more experiments. The first RTD and the second RTD measure changes in resistance due to heating of the first heater and the second heater to calculate voltages across the first RTD and the second RTD. The amplifier amplifies the voltages to calculate a differential voltage for each of the three or more experiments, and converts the differential voltage into a digital signal. The processing unit is configured to process the digital signal to detect explosive trace in the desorbed sample.

System and method of detecting explosive compounds based on rapid deflagration and differential micro-calorimetry

A polymer based photo-detector has photoresponsivity in Ultraviolet, Visible, Near and Mid Infrared regions. The photo-detector comprises a single layer of polyvinyl alcohol (PVA) as a photoactive layer; with no additional buffer layer for accepting Ultraviolet, Visible and Infrared radiation as well as no buffer layer to block charge carrier injection. The PVA layer's photoresponsivity is extended from Ultraviolet to Near Infrared by changing its nano-morphology on a low thermal device structure. The primarily photo-generated charge carriers diffuse through the amorphous part of the polymer layer and split into charge carriers on the electrodes or by the charge traps in the layer. The charge carrier generation is in the picosecond range; thus the exciton and Polaron drift diffusion cause electrical conduction of the polymer layer under Ultraviolet illumination. The low thermal mass of the MEMS based structure reduces localized heating effect due to Infrared radiation, increasing responsivity of the photo-detector.

Micro electro mechanical system (MEMS) based wide-band polymer photo-detector

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Mumbai, India

V Ramgopal Rao