Searched for: subject:"gas%5C+sensors"
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Morelli, L. (author), Ricciardella, F. (author), Koole, Max (author), Persijn, Stefan (author), Vollebregt, S. (author)
A novel gas sensor based on multi-layered graphene (MLG) functionalised with gold nanoparticles (Au-NPs) is presented. We demonstrate for the first time that: (1) the signal saturates during the analyte exposure, something which does not occur in the pristine material and in graphene-based gas sensors in general; (2) the sign of the device...
conference paper 2020
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Sun, J. (author)
The microelectronics industry, next to the powerful, continuously scaling of integrated circuits, is currently evolving in the diversification of integrated functions, generally referred to as more than Moore (MtM). MtM concerns all technologies enabling microsystems to be elevated to a higher integration level, and with small package size,...
doctoral thesis 2020
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Shooshtari, M. (author), Salehi, Alireza (author), Vollebregt, S. (author)
Carbon nanotubes (CNTs) have shown promising results for gas sensing due to their high surface area. Since humidity has a great impact on the electrical conductivity of resistive CNT gas sensors, we have investigated the change of humidity on their sensing properties. In this study, we fabricated vertically aligned CNT-based gas sensors for the...
journal article 2020
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Sokolovskij, R. (author)
The rapid development and market growth of microelectronics technology continues to provide expanding connectivity, productivity, entertainment and well-being to billions of users globally. Moreover, continuous demand for more on-chip functionally presents an exciting opportunity for integration of various chemical sensors for monitoring...
doctoral thesis 2019
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Liu, Tianhan (author), Qin, Hongbo (author), Yang, Daoguo (author), Zhang, Kouchi (author)
For the purpose of exploring the application of two-dimensional (2D) material in the field of gas sensors, the adsorption properties of gas molecules, CO, CO<sub>2</sub>, CH<sub>2</sub>O, O<sub>2</sub>, NO<sub>2</sub>, and SO2 on the surface of monolayered tin selenium in β phase (β-SnSe) has been researched by first principles calculation...
journal article 2019
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Jagarlamudi, Samyuktha (author)
Large scale industries like automobile, agriculture and poultry etc.. are in the need of a reliable technology for gas sensors. Till date various types of sensors have been developed for gas applications but the SiC gas sensing has been a recent trend. With increase study in MEMS technology, the SiC material is gaining importance for sensor...
master thesis 2019
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Feng, Chuang (author), Qin, Hongbo (author), Yang, Daoguo (author), Zhang, Kouchi (author)
CH <sub>2</sub> O is a common toxic gas molecule that can cause asthma and dermatitis in humans. In this study the adsorption behaviors of the CH <sub>2</sub> O adsorbed on the boron nitride (BN), aluminum nitride (AlN), gallium nitride (GaN), indium nitride (InN), boron phosphide (BP), and phosphorus (P) monolayers were investigated using...
journal article 2019
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Ricciardella, F. (author), Polichetti, Tiziana (author), Vollebregt, S. (author), Alfano, Brigida (author), Massera, Ettore (author), Sarro, P.M. (author)
Limitations such as lack of detected stationary signal and slow signal recovery after detection currently affect graphene-based chemi-sensors operating at room temperature. In this work, we model the behavior of a sensor in a test chamber having limited volume and simulating the environmental conditions. From this model, we mathematically derive...
journal article 2019
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Zhang, Jian (author), Sokolovskij, R. (author), Chen, Ganhui (author), Zhu, Yumeng (author), Qi, Yongle (author), Lin, Xinpeng (author), Li, Wenmao (author), Zhang, G. (author), Jiang, Yu-Long (author), Yu, Hongyu (author)
In this paper, a method to extend the detection range of hydrogen sulfide (H<sub>2</sub>S) gas sensor is demonstrated. The sensor is based on AlGaN/GaN high electron mobility transistors (HEMTs) with Pt gate. It is observed that the as-fabricated devices exhibited sensing signal saturation at 30 ppm H<sub>2</sub>S exposure in dry air. A pre...
journal article 2019
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Dolleman, R.J. (author)
Micro and nanomechanical sensors are indispensable in modern consumer electronics, automotive and medical industries. Gas pressure sensors are currently the most widespread membrane-based micromechanical sensors. By reducing their size, their unit costs and energy consumption drops, making them more attractive for integration in new applications...
doctoral thesis 2018
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Pennazza, Giorgio (author), Santonico, Marco (author), Vollero, Luca (author), Zompanti, A. (author), Sabatini, A. (author), Kumar, Nandeesh (author), Pini, Ivan (author), Quiros Solano, W.F. (author), Sarro, P.M. (author), D'Amico, Arnaldo (author)
This paper presents an advanced voltammetric system to be used as electronic tongue for liquid and gas analysis. It has been designed to be more flexible and accurate with respect to other existing and similar systems. It features improved electronics and additional operative conditions. Among others these include the possibility to optically...
journal article 2018
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Sokolovskij, R. (author), Zhang, Jian (author), Iervolino, E. (author), Zhao, Changhui (author), Santagata, F. (author), Wang, F. (author), Yu, Hongyu (author), Sarro, P.M. (author), Zhang, Kouchi (author)
AlGaN/GaN high electron mobility transistor (HEMT)-based sensors with catalytic platinum gate were micro-fabricated on commercially available epitaxial wafers and extensively characterized for ppm level hydrogen sulfide (H<sub>2</sub>S) detection for industrial safety applications. High operating temperature above 150 °C enabled large signal...
journal article 2018
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Shi, Shengtai (author)
This thesis study investigates the effects of differently prepared oxide substrates on gas sensing behaviors of graphene gas sensor. Explanations for why such effects happen are also revealed through experimental works. The thesis consists of a detailed study of gas sensing behaviors from graphene gas sensors using different oxide substrates....
master thesis 2017
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Sachdeva, S. (author), Koper, S.J.H. (author), Sabetghadam, A. (author), Soccol, Dimitri (author), Gravesteijn, Dirk J. (author), Kapteijn, F. (author), Sudhölter, Ernst J. R. (author), Gascon, Jorge (author), de Smet, L.C.P.M. (author)
Affinity layers play a crucial role in chemical sensors for the selective and sensitive detection of analytes. Here, we report the use of composite affinity layers containing Metal Organic Frameworks (MOFs) in a polymeric matrix for sensing purposes. Nanoparticles of NH<sub>2</sub>-MIL-53(Al) were dispersed in a Matrimid polymer matrix with...
journal article 2017
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Hu, Fa-Fei (author), Tang, H. (author), Ye, H. (author), Chen, X. (author), Zhang, Kouchi (author)
The sensing behavior of monolayer tin sulfide (SnS) for four gas molecules (NH<sub>3</sub>, NO<sub>2</sub>, CO, and H<sub>2</sub>O) are studied by the first-principle calculation based on density-functional theory. We calculate adsorption energy, adsorption distance, and Hirshfeld charge to estimate the adsorption ability of monolayer SnS for...
journal article 2017
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Ricciardella, F. (author), Vollebregt, S. (author), Polichetti, T. (author), Alfano, B. (author), Massera, E. (author), Sarro, P.M. (author)
In this paper we report on gas sensors based on graphene grown by Chemical Vapor Deposition at 850 °C. Mo was used as catalyst for graphene nucleation. Resistors were directly designed on pre-patterned Mo using the transfer-free process we recently developed, thus avoiding films damage during the transfer to the target substrate. Devices...
conference paper 2017
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Ricciardella, F. (author), Vollebregt, S. (author), Polichetti, Tiziana (author), Alfano, B. (author), Massera, E. (author), Sarro, P.M. (author)
<br/>In this work, we present an innovative method which enables to solve fundamental limitations affecting graphene-based chemi-sensors operating under environmental conditions, namely the lack of signal saturation and the scarce recovery after the detection step. The method, which exploits the differential current instead of the current itself...
conference paper 2017
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Ayerden, N.P. (author), Mandon, Julien (author), Harren, Frans J.M. (author), Wolffenbuttel, R.F. (author)
Increasing demand for field instruments designed to measure gas composition has strongly promoted the development of robust, miniaturized and low-cost handheld absorption spectrometers in the mid-infrared. Efforts thus far have focused on miniaturizing individual components. However, the optical absorption path that the light beam travels...
journal article 2017
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Cai, Z. (author), van Veldhoven, Robert H.M. (author), Falepin, A. (author), Suy, H. (author), Sterckx, E. (author), Bitterlich, C. (author), Makinwa, K.A.A. (author), Pertijs, M.A.P. (author)
This paper reports a readout circuit for a resistive CO2 sensor, which operates by measuring the CO2-dependent thermal conductivity of air. A suspended hot-wire transducer, which acts both as a resistive heater and temperature sensor, exhibits a CO2-dependent heat loss to the surrounding air, allowing CO2 concentration to be derived from its...
journal article 2016
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Dolleman, R.J. (author), Cartamil Bueno, S.J. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)
We show that graphene membranes that separate two gases at identical pressure are deflected by osmotic pressure. The osmotic pressure is a consequence of differences in gas permeation rates into a few-layer graphene enclosed cavity. The deflection of the membrane is detected by measuring the tension-induced resonance frequency with an...
journal article 2016
Searched for: subject:"gas%5C+sensors"
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