Modeling and simulation analysis of pressure-sensing characteristics for piezoresistive pressure sensor based on graphene/hexagonal boron nitride heterostructures

2017 ◽  
Author(s):  
Zhongzheng Fang ◽  
Yong Zhang ◽  
Jing Qiu ◽  
Guanjun Liu
Keyword(s):  
Boron Nitride ◽  
Modeling And Simulation ◽  
Pressure Sensor ◽  
Simulation Analysis ◽  
Hexagonal Boron Nitride ◽  
Pressure Sensing ◽  
Piezoresistive Pressure Sensor ◽  
Sensing Characteristics

Modeling and Simulation of the Thermal Drift Characteristics of the Piezoresistive Pressure Sensor

2010 ◽  
Vol 2010 (HITEC) ◽  
pp. 000373-000378
Author(s):  
R. Otmani ◽  
N. Benmoussa ◽  
K. Ghaffour
Keyword(s):  
Thermal Behavior ◽  
Modeling And Simulation ◽  
Pressure Sensor ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Thermal Drift ◽  
Piezoresistive Pressure Sensor ◽  
Output Characteristics ◽  
Piezoresistive Pressure Sensors

Piezoresistive pressure sensors based on Silicon have a large thermal drift because of their high sensitivity to temperature (ten times more sensitive to temperature than metals). So the study of the thermal behavior of these sensors is essential to define the parameters that cause the drift of the output characteristics. In this study, we adopted the behavior of 2nd degree gauges depending on the temperature. Then we model the thermal behavior of the sensor and its characteristics.

scholarly journals A Flexible and Highly Sensitive Piezoresistive Pressure Sensor Based on Micropatterned Films Coated with Carbon Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Jia-lin Yao ◽  
Xing Yang ◽  
Na Shao ◽  
Hui Luo ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Gas Sensing ◽  
Fluid Pressure ◽  
High Sensitivity ◽  
Sensing Element ◽  
Pressure Sensing ◽  
Piezoresistive Pressure Sensor ◽  
Highly Sensitive ◽  
Flexible Pressure Sensor ◽  
Low Consumption

Excellent flexibility, high sensitivity, and low consumption are essential characteristics in flexible microtube pressure sensing occasion, for example, implantable medical devices, industrial pipeline, and microfluidic chip. This paper reports a flexible, highly sensitive, and ultrathin piezoresistive pressure sensor for fluid pressure sensing, whose sensing element is micropatterned films with conductive carbon nanotube layer. The flexible pressure sensor, the thickness of which is 40 ± 10 μm, could be economically fabricated by using biocompatible polydimethylsiloxane (PDMS). Experimental results show that the flexible pressure sensor has high sensitivity (0.047 kPa−1in gas sensing and 5.6 × 10−3 kPa−1in liquid sensing) and low consumption (<180 μW), and the sensor could be used to measure the pressure in curved microtubes.

Marcus-Hush Theory Revealed by Electron Tunneling Through Hexagonal Boron Nitride

2019 ◽  
Author(s):  
Matěj Velický ◽  
Sheng Hu ◽  
Colin R. Woods ◽  
Peter S. Toth ◽  
Viktor Zólyomi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Boron Nitride ◽  
Electron Tunneling ◽  
Hexagonal Boron Nitride ◽  
Large Body ◽  
Liquid Solution ◽  
Limiting Current ◽  
Electron Transfer Rate Constant ◽  
Electrochemical Parameters ◽  
Voltammetric Measurements

Marcus-Hush theory of electron transfer is one of the pillars of modern electrochemistry with a large body of supporting experimental evidence presented to date. However, some predictions, such as the electrochemical behavior at microdisk electrodes, remain unverified. Herein, we present a study of electron tunneling across a hexagonal boron nitride barrier between a graphite electrode and redox levels in a liquid solution. This was achieved by the fabrication of microdisk electrodes with a typical diameter of 5 µm. Analysis of voltammetric measurements, using two common redox mediators, yielded several electrochemical parameters, including the electron transfer rate constant, limiting current, and transfer coefficient. They show a significant departure from the Butler-Volmer behavior in a clear manifestation of the Marcus-Hush theory of electron transfer. In addition, our system provides a novel experimental platform, which could be applied to address a number of scientific problems such as identification of reaction mechanisms, surface modification, or long-range electron transfer.

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