Manmeet Kaur

Bhabha Atomic Research Centre

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D. K. Aswal

Bhabha Atomic Research Centre

S. K. Gupta

Indian Institute of Technology Roorkee

Niranjan S. Ramgir

Bhabha Atomic Research Centre

A.K. Debnath

Bhabha Atomic Research Centre

Niyanta Datta

Dublin City University

K.P. Muthe

Bhabha Atomic Research Centre

N. Datta

Koneru Lakshmaiah Education Foundation

J. V. Yakhmi

Bhabha Atomic Research Centre

S. C. Gadkari

Bhabha Atomic Research Centre

Shovit Bhattacharya

Bhabha Atomic Research Centre

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Bhabha Atomic Research Centre

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Bhabha Atomic Research Center Hospital

Homi Bhabha National Institute

Indian Institute of Technology Bombay

University of Mumbai

Savitribai Phule Pune University

University of Auckland

MacDiarmid Institute for Advanced Materials and Nanotechnology

Barkatullah University

Lovely Professional University

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Commercial H<inf>2</inf>s sensor based on SnO<inf>2</inf>:CuO thin films

S. Kailasa Ganapathi Niranjan S. Ramgir Niyanta Datta Vivek Patnaik Ankit Patel

In the present work, a commercial device for the detection of H ₂ S using SnO ₂ ; CuO thin film as a sensing material has been demonstrated. A complete device consist of SnO ₂ : CuO sensor thin film deposited on alumina substrate, teflon head in stainless steel housing containing the temperature control circuit with Pt-50 based heater and Pt-100 as reader, and a stand-alone monitor consisting of Data Acquisition & Control Board (DACB) and touch screen based human-machine interface (HMI) module. The monitor measures the change in resistance of sensor element on exposure to gas and displays the result in concentration (ppm). The monitor is also provided with a programmable alarm set point, touch switch to change between Normal/ Calibration Mode and provision to enter the historical logs like last sensor installation date, last sensor calibration date, last fault detail etc,.

10.1109/ispts.2015.7220084

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Mechanism of drifts in H2S sensing properties of SnO2:CuO composite thin film sensors prepared by thermal evaporation

Sensors and Actuators B Chemical (2003)

V.R. Katti A.K. Debnath K.P. Muthe Manmeet Kaur A.K. Dua

Thermal oxidation

Tin oxide

Copper oxide

Hydrogen sulphide

10.1016/s0925-4005(03)00532-x

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Citations (171)

Charge transport and ammonia sensing properties of flexible polypyrrole nanosheets grown at air–liquid interface

Materials Chemistry and Physics (2013)

P. Jha Niranjan S. Ramgir Preetam K. Sharma N. Datta S. Kailasaganapathi

Polypyrrole

Variable-range hopping

10.1016/j.matchemphys.2013.03.040

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Citations (16)

Microwave absorption studies of diluted high-temperature superconductors: delineation of superconductor-insulator-superconductor and superconductor-normal-superconductor junctions

Philosophical Magazine B (2001)

Manmeet Kaur R.M. Kadam M. K. Bhide Meghan Rane Y. Babu

Abstract With a view to investigating the nature of weak links in granular superconductors at very dilute level, we have studied the low-field microwave absorption signal (below about 50 G) in the electron paramagnetic resonance mode of detection in samples of Tl2BaCa2Cu2O8+δ and YBa2Cu3O7-δ at different dilution levels in the Al2O3 matrix. The signal has been monitored as a function of temperature as well as concentration. The temperature dependence of the signal intensity has been understood by applying a model in which microwave absorption is assumed to be caused by the field- and tempera ture-dependent currents in the Josephson links. It is shown that the parameter ηo quantifying the strength of coupling between superconducting grains can be calculated from the value of temperature at which the intensity I pp(T) (the subscript pp indicates a peak-to-peak value), goes through a maximum. Using the ηo value so obtained, the fitting for I pp(T) fhroughout the temperature range, was used to distinguish superconductor-insulator-superconductor (S-I-S) junctions from superconductor-normal-superconductor (S-N-S) junctions. In bulk samples the signal due to S-I-S junctions is found to predominate, whereas the relative contribution due to S-N-S junctions predominates on dilution. In extremely diluted samples, the surviving junctions were found to have only S-N-S character.

10.1080/13642810108221983

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Application of Aligned ZnO Nanowires/Nanobelts as a Room Temperature NO Gas Sensor

Journal of Nanoscience and Nanotechnology (2009)

Manmeet Kaur Shiv Chauhan Shivangi Sinha Meetu Bharti Rajneesh Mohan

Gas sensing properties of devices fabricated using ZnO nanowires/nanobelts (NS) aligned between two electrodes using dielectrophoresis technique were investigated. ZnO nanostructures were synthesized by carbothermal method. The devices were characterized as gas sensors and showed high sensitivity for detection of NO gas at room temperature. Typical sensor response, defined as the relative change in resistance, due to the introduction of the gas was found to be approximately 500% for 40 ppm of NO gas. The devices showed average response and recovery times of about 30 s and 1 min respectively. The results demonstrate the potential of fabricating nanosized sensors using single nanowires/nanobelts.

Dielectrophoresis

10.1166/jnn.2009.1118

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P2.4.11 Growth and H2S Gas Sensing Properties of CuO Functionalized ZnO Nanotetrapod

Proceedings IMCS 2012 (2012)

Manmeet Kaur Kailasa Ganapathi Niranjan S. Ramgir Niyanta Datta D. K. Aswal

We report gas-sensing properties of thick films prepared using ZnO Nanotetrapods and CuOfunctionalized ZnO Nanotetrapods. Gas sensors based on ZnO nanostructure have been widely reported, but they have some limitations, such as low sensitivity, specificity and high working temperature. ZnO is a n-type semiconductor and CuO, a well-known sensitizer for H2S is a p-type semiconductor. The use of heterojunctions between p-type and n-type material has been previously reported in literature to increase the sensitivity. As expected sensitivity and selectivity of the CuO coated ZnO Nanotetrapods films towards H2S increased as compared to pure ZnO Nanotetrapods films. It was also observed ZnO Nanotetrapods film senses H2S at higher temperatures, whereas CuO-functionalized ZnO Nanotetrapods show a high sensitivity at very low temperatures.

10.5162/imcs2012/p2.4.11

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Heterostructured In2O3-ZnO Nanowires based Chemiresistive NO2 Sensor

Deleted Journal (2024)

Deepak Goyal Damu Vilas Rupnar A. V. Sapre Suman Kalyan Samanta N.S. Rawat

10.1016/j.jacomc.2024.100045

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Elucidation of structural, morphological, optical and photoluminescence properties of single and (In, Ga) co-doped ZnO nanocrystalline thin films

Bulletin of Materials Science (2019)

M. Shaheera K.G. Girija Manmeet Kaur V. Geetha A.K. Debnath

Wurtzite crystal structure

Nanocrystalline material

10.1007/s12034-019-1945-7

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Citations (13)

Defect-Induced Adsorption Switching (p- to n- Type) in Conducting Bare Carbon Nanotube Film for the Development of Highly Sensitive and Flexible Chemiresistive-Based Methanol and NO₂ Sensor

ACS Omega (2023)

Jyoti Prakash P.T. Rao Rohan Rohilla Divya Nechiyil Manmeet Kaur

Lightweight and flexible gas sensors are essentially required for the fast detection of toxic gases to pass on the early warning to deter accident situations caused by gas leakage. In view of this, we have fabricated a thin paper-like free-standing, flexible, and sensitive carbon nanotube (CNT) aerogel gas sensor. The CNT aerogel film synthesized by the floating catalyst chemical vapor deposition method consists of a tiny network of long CNTs and ∼20% amorphous carbon. The pores and defect density of the CNT aerogel film were tuned by heating at 700 °C to obtain a sensor film, which showed excellent sensitivity for toxic NO2 and methanol gas in the concentration range of 1-100 ppm with a remarkable limit of detection ∼90 ppb. This sensor has consistently responded to toxic gas even after bending and crumpling the film. Moreover, the film heat-treated at 900 °C showed a lower response with opposite sensing characteristics due to switching of the semiconductor nature of the CNT aerogel film to n-type from p-type. The annealing temperature-based adsorption switching can be related to a type of carbon defect in the CNT aerogel film. Therefore, the developed free-standing, highly sensitive, and flexible CNT aerogel sensor paves the way for a reliable, robust, and switchable toxic gas sensor.

10.1021/acsomega.2c07314

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Stability and cytotoxicity of crystallin amyloid nanofibrils

Nanoscale (2014)

Manmeet Kaur Jackie P. Healy Madhusudan Vasudevamurthy Moritz Lassé Ljiljana Puškar

An investigation of the biophysical stability and safety properties of crystallin amyloid nanofibrils – a potential novel bionanomaterial.

Crystallin

Amyloid (mycology)

Amyloid disease

10.1039/c4nr04624b

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Citations (23)