A New Chemical Sensing Material for Ethanol Detection: Graphene-Like Film

2017 ◽  
pp. 59-65
Author(s):  
B. Alfano ◽  
M. Alfè ◽  
V. Gargiulo ◽  
T. Polichetti ◽  
E. Massera ◽  
...  
Keyword(s):  
Chemical Sensing ◽  
Sensing Material

An imprinted crystalline colloidal array chemical-sensing material for detection of trace diethylstilbestrol

The Analyst ◽  
2013 ◽  
Vol 138 (9) ◽  
pp. 2720 ◽  
Author(s):  
Na Sai ◽  
Baoan Ning ◽  
Guowei Huang ◽  
Yuntang Wu ◽  
Zhijiang Zhou ◽  
...  
Keyword(s):  
Chemical Sensing ◽  
Sensing Material ◽  
Crystalline Colloidal Array

Review of Microfluidic Devices for On-Chip Chemical Sensing

2016 ◽  
Vol 136 (6) ◽  
pp. 244-249
Author(s):  
Takahiro Watanabe ◽  
Fumihiro Sassa ◽  
Yoshitaka Yoshizumi ◽  
Hiroaki Suzuki
Keyword(s):  
Chemical Sensing ◽  
Microfluidic Devices ◽  
On Chip

scholarly journals Optimization of a Low-Power Chemoresistive Gas Sensor: Predictive Thermal Modelling and Mechanical Failure Analysis

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 783 ◽  
Author(s):  
Andrea Gaiardo ◽  
David Novel ◽  
Elia Scattolo ◽  
Michele Crivellari ◽  
Antonino Picciotto ◽  
...  
Keyword(s):  
Low Power ◽  
Failure Analysis ◽  
Gas Sensors ◽  
High Performance ◽  
Gas Sensing ◽  
Mechanical Failure ◽  
Sensing Applications ◽  
Theoretical Approaches ◽  
Sensing Material ◽  
Silicon Bulk

The substrate plays a key role in chemoresistive gas sensors. It acts as mechanical support for the sensing material, hosts the heating element and, also, aids the sensing material in signal transduction. In recent years, a significant improvement in the substrate production process has been achieved, thanks to the advances in micro- and nanofabrication for micro-electro-mechanical system (MEMS) technologies. In addition, the use of innovative materials and smaller low-power consumption silicon microheaters led to the development of high-performance gas sensors. Various heater layouts were investigated to optimize the temperature distribution on the membrane, and a suspended membrane configuration was exploited to avoid heat loss by conduction through the silicon bulk. However, there is a lack of comprehensive studies focused on predictive models for the optimization of the thermal and mechanical properties of a microheater. In this work, three microheater layouts in three membrane sizes were developed using the microfabrication process. The performance of these devices was evaluated to predict their thermal and mechanical behaviors by using both experimental and theoretical approaches. Finally, a statistical method was employed to cross-correlate the thermal predictive model and the mechanical failure analysis, aiming at microheater design optimization for gas-sensing applications.

Soft template-mediated coupling construction of sandwiched mesoporous PPy/Ag nanoplates for rapid and selective NH3 sensing

2021 ◽  
Vol 9 (13) ◽  
pp. 8308-8316
Author(s):  
Facai Wei ◽  
Yonghui Zhong ◽  
Hao Luo ◽  
Yong Wu ◽  
Jianwei Fu ◽  
...  
Keyword(s):  
Chemical Sensing ◽  
Liquid Interface ◽  
Soft Template ◽  
One Step ◽  
Construction Strategy ◽  
Sensing Performance

We propose a facile soft template-mediated coupling construction strategy for one-step fabrication of sandwiched mesoporous PPy/Ag nanoplates at the liquid interface, and the hybrid showed great chemical sensing performance for NH3 gas.

scholarly journals A Highly Birefringent Photonic Crystal Fiber for Terahertz Spectroscopic Chemical Sensing

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1799
Author(s):  
Tianyu Yang ◽  
Liang Zhang ◽  
Yunjie Shi ◽  
Shidi Liu ◽  
Yuming Dong
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chemical Sensing ◽  
Numerical Aperture ◽  
Wide Band ◽  
Relative Sensitivity ◽  
Chemical Sensitivity ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Polarization Maintaining

A photonic crystal fiber (PCF) with high relative sensitivity was designed and investigated for the detection of chemical analytes in the terahertz (THz) regime. To ease the complexity, an extremely simple cladding employing four struts is adopted, which forms a rectangular shaped core area for filling with analytes. Results of enormous simulations indicate that a minimum 87.8% relative chemical sensitivity with low confinement and effective material absorption losses can be obtained for any kind of analyte, e.g., HCN (1.26), water (1.33), ethanol (1.35), KCN (1.41), or cocaine (1.50), whose refractive index falls in the range of 1.2 to 1.5. Besides, the PCF can also achieve high birefringence (∼0.01), low and flat dispersion, a large effective modal area, and a large numerical aperture within the investigated frequency range from 0.5 to 1.5 THz. We believe that the proposed PCF can be applied to chemical sensing of liquid and THz systems requiring wide-band polarization-maintaining transmission and low attenuation.

scholarly journals Three-Dimensional (3D) Laser-Induced Graphene: Structure, Properties, and Application to Chemical Sensing

2021 ◽  
Author(s):  
Federico Maria Vivaldi ◽  
Alexander Dallinger ◽  
Andrea Bonini ◽  
Noemi Poma ◽  
Lorenzo Sembranti ◽  
...  
Keyword(s):  
Chemical Sensing ◽  
Three Dimensional ◽  
Structure Properties
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