A bio-inspired self-recoverable polyampholyte hydrogel with low temperature sensing

2021 ◽  
Author(s):  
Xinyao Li ◽  
Lingshu Kong ◽  
Guanghui Gao
Keyword(s):  
Low Temperature ◽  
Temperature Sensing ◽  
Physiological Signal ◽  
Electronic Skin ◽  
Wide Range ◽  
Temperature Environment ◽  
Stable Performance ◽  
Signal Monitoring ◽  
Complex Temperature

An anti-freezing, self-recovery sensor enabled by a polyampholyte hydrogel demonstrated stable performance in a complex temperature environment and exhibited a wide range of applications in physiological signal monitoring and electronic skin.

Nitrogen Doping in Low-Temperature Halo-Carbon Homoepitaxial Growth of SiC

2008 ◽  
Vol 600-603 ◽  
pp. 159-162 ◽  
Author(s):  
Krista Chindanon ◽  
Huang De Lin ◽  
Galyna Melnychuk ◽  
Yaroslav Koshka
Keyword(s):  
Growth Rate ◽  
Low Temperature ◽  
Nitrogen Doping ◽  
Critical Role ◽  
Growth Conditions ◽  
Vapor Condensation ◽  
Nitrogen Incorporation ◽  
Wide Range ◽  
Complex Temperature ◽  
Site Competition

In this work, nitrogen doping was investigated during the low-temperature halo-carbon epitaxial growth of 4H-SiC on Si- and C-faces. The dependencies of nitrogen incorporation on nitrogen flow rate, Si/C ratio, growth rate, and temperature were investigated. It was established that the efficiency of nitrogen incorporation for the C-face growth at 1300 °C is higher than that for the Si-face for a wide range of the growth conditions. Seeming deviation of the Si/C ratio dependence from the “site-competition” trend confirmed the critical role of the silicon vapor condensation during the low-temperature epitaxy. Opposite trends for the nitrogen doping dependence on the growth rate were observed on the Si- and C-faces. Finally, a complex temperature dependence of the nitrogen doping in the temperature range from 1300 to 1450 0C was observed.

A Novel Structure of Polyimide-Based Humidity Sensor Used in Low Temperature Environment

2013 ◽  
Vol 562-565 ◽  
pp. 276-279
Author(s):  
Li Xiao ◽  
Zhan Zhao ◽  
Li Dong Du ◽  
Zhen Fang ◽  
Shao Hua Wu
Keyword(s):  
Relative Humidity ◽  
Low Temperature ◽  
Humidity Sensor ◽  
Lower Electrode ◽  
Ambient Relative Humidity ◽  
Novel Structure ◽  
Wide Range ◽  
Temperature Environment ◽  
Suspended Membrane ◽  
Lower Temperature

In this paper, a new structure of polyimide-based humidity sensor is developed, which can work better at low temperature environment. In this humidity sensor, the capacitive part is sputtered on a suspended membrane, the lower electrode is also a controllable heater, used to control the temperature on the surface of the sensor through the external circuits. The results of experiment suggest that the sensor has a wide range of sensing ambient relative humidity from 10%RH to 90%RH with a controllable constant temperature and at a lower temperature it shows a good linearity.

A dual-mode electronic skin textile for pressure and temperature sensing

2021 ◽  
pp. 130599
Author(s):  
Yabing Wang ◽  
Miaomiao Zhu ◽  
Xuedian Wei ◽  
Jianyong Yu ◽  
Zhaoling Li ◽  
...  
Keyword(s):  
Temperature Sensing ◽  
Dual Mode ◽  
Electronic Skin

scholarly journals RELaTED Project: New Developments on Ultra-Low Temperature District Heating Networks

Proceedings ◽  
2020 ◽  
Vol 65 (1) ◽  
pp. 25
Author(s):  
Antonio Garrido Marijuan ◽  
Roberto Garay ◽  
Mikel Lumbreras ◽  
Víctor Sánchez ◽  
Olga Macias ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
Waste Heat ◽  
District Heating ◽  
Hot Water ◽  
Thermal Systems ◽  
Heating Source ◽  
Wide Range ◽  
Thermal Sources ◽  
Heating Networks

District heating networks deliver around 13% of the heating energy in the EU, being considered as a key element of the progressive decarbonization of Europe. The H2020 REnewable Low TEmperature District project (RELaTED) seeks to contribute to the energy decarbonization of these infrastructures through the development and demonstration of the following concepts: reduction in network temperature down to 50 °C, integration of renewable energies and waste heat sources with a novel substation concept, and improvement on building-integrated solar thermal systems. The coupling of renewable thermal sources with ultra-low temperature district heating (DH) allows for a bidirectional energy flow, using the DH as both thermal storage in periods of production surplus and a back-up heating source during consumption peaks. The ultra-low temperature enables the integration of a wide range of energy sources such as waste heat from industry. Furthermore, RELaTED also develops concepts concerning district heating-connected reversible heat pump systems that allow to reach adequate thermal levels for domestic hot water as well as the use of the network for district cooling with high performance. These developments will be demonstrated in four locations: Estonia, Serbia, Denmark, and Spain.

scholarly journals Research on Performance Test System of Space Harmonic Reducer in High Vacuum and Low Temperature Environment

Machines ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Jing Wang ◽  
Zhihua Wan ◽  
Zhurong Dong ◽  
Zhengguo Li
Keyword(s):  
Low Temperature ◽  
High Speed ◽  
Performance Test ◽  
High Reliability ◽  
High Vacuum ◽  
Test System ◽  
Low Noise ◽  
Speed Ratio ◽  
Space Harmonic ◽  
Temperature Environment

The harmonic reducer, with its advantages of high precision, low noise, light weight, and high speed ratio, has been widely used in aerospace solar wing deployment mechanisms, antenna pointing mechanisms, robot joints, and other precision transmission fields. Accurately predicting the performance of the harmonic reducer under various application conditions is of great significance to the high reliability and long life of the harmonic reducer. In this paper, a set of automatic harmonic reducer performance test systems is designed. By using the CANOpen bus interface to control the servo motor as the drive motor, through accurately controlling the motor speed and rotation angle, collecting the angle, torque, and current in real time, the life cycle test of space harmonic reducer was carried out in high vacuum and low temperature environment on the ground. Then, the collected data were automatically analyzed and calculated. The test data of the transmission accuracy, backlash, and transmission efficiency of the space harmonic reducer were obtained. It is proven by experiments that the performance data of the harmonic reducer in space work can be more accurately obtained by using the test system mentioned in this paper, which is convenient for further research on related lubricating materials.

Fully-physically crosslinked silk fibroin/poly(hydroxyethyl acrylamide) hydrogel with high transparency and adhesive properties for wireless sensing and low-temperature strain sensing

2021 ◽  
Vol 9 (6) ◽  
pp. 1880-1887
Author(s):  
Xia Sun ◽  
Shaoshuai He ◽  
Mengmeng Yao ◽  
Xiaojun Wu ◽  
Haitao Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Silk Fibroin ◽  
Temperature Sensing ◽  
Wireless Sensing ◽  
Strain Sensitivity ◽  
Strain Sensing ◽  
Adhesive Properties ◽  
High Transparency ◽  
Physically Crosslinked ◽  
Temperature Strain

Fully-physically crosslinked hydrogels with strain sensitivity and anti-freezing properties for wireless sensing and low temperature sensing were prepared.

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