Coral-like ZnFe2O4–ZnO mesoporous heterojunction architectures: synthesis and enhanced sensing properties for triethylamine

2020 ◽  
Vol 7 (9) ◽  
pp. 1918-1926 ◽  
Author(s):  
Tianye Yang ◽  
Xiaodong Yang ◽  
Mingming Zhu ◽  
Hongwei Zhao ◽  
Mingzhe Zhang

A unique coral-like ZnFe2O4–ZnO heterojunction architecture based sensor has been synthesized and shows excellent sensing performance for TEA with a particularly fast response time of 0.9 s.

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 874
Author(s):  
Soyoung Bae ◽  
Youngno Kim ◽  
Jeong Min Kim ◽  
Jung Hyun Kim

MXene, a 2D material, is used as a filler to manufacture polymer electrolytes with high ionic conductivity because of its unique sheet shape, large specific surface area and high aspect ratio. Because MXene has numerous -OH groups on its surface, it can cause dehydration and condensation reactions with poly(4-styrenesulfonic acid) (PSSA) and consequently create pathways for the conduction of cations. The movement of Grotthuss-type hydrogen ions along the cation-conduction pathway is promoted and a high ionic conductivity can be obtained. In addition, when electrolytes composed of a conventional acid or metal salt alone is applied to an electrochromic device (ECD), it does not bring out fast response time, high coloration efficiency and transmittance contrast simultaneously. Therefore, dual-cation electrolytes are designed for high-performance ECDs. Bis(trifluoromethylsulfonyl)amine lithium salt (LiTFSI) was used as a source of lithium ions and PSSA crosslinked with MXene was used as a source of protons. Dual-Cation electrolytes crosslinked with MXene was applied to an indium tin oxide-free, all-solution-processable ECD. The effect of applying the electrolyte to the device was verified in terms of response time, coloration efficiency and transmittance contrast. The ECD with a size of 5 × 5 cm2 showed a high transmittance contrast of 66.7%, fast response time (8 s/15 s) and high coloration efficiency of 340.6 cm2/C.


2006 ◽  
Vol 453 (1) ◽  
pp. 215-226 ◽  
Author(s):  
Sebastian Gauza ◽  
Chien-Hui Wen ◽  
Yang Zhao ◽  
Shin-Tson Wu ◽  
Anna Ziółek ◽  
...  

1997 ◽  
Vol 471 ◽  
Author(s):  
J. Liu ◽  
D. C. Morton ◽  
M. R. Miller ◽  
Y. Li ◽  
E. W. Forsythe ◽  
...  

ABSTRACTZn2SiO4:Mn thin films were deposited and studied as thin film phosphors for flat panel cathodoluminescent displays. Crystallized films with improved electrical conductivity were obtained after conventional and rapid thermal annealings in a N2 environment at 850Xy11100 °C for 0.25 to 60 minutes. A maximum cathodoluminescent efficiency of 1.3 Lm/W was achieved under dc excitation at 1500 volts. The luminescent emission from these thin films was peaked around 525 nm. The decay time of these films was controlled in the range of 2 to 10 ms by varying the deposition and annealing parameters. The fast response time of these thin films overcomes the long decay limitation of the Zn2SiO4:Mn powder phosphor in practical display applications.


2019 ◽  
Vol 7 (44) ◽  
pp. 7033-7041 ◽  
Author(s):  
Sansan Shen ◽  
Bohui Huang ◽  
Xiaofeng Guo ◽  
Hong Wang

An on–off–on fluorescent sensor based on N-SiQD has the advantages of fast response time and high sensitivity to Hg2+ and GSH.


2005 ◽  
Vol 36 (1) ◽  
pp. 986 ◽  
Author(s):  
Y. Ito ◽  
R. Matsubara ◽  
R. Nakamura ◽  
M. Nagai ◽  
S. Nakamura ◽  
...  

2017 ◽  
Vol 7 (8) ◽  
pp. 2740 ◽  
Author(s):  
Chun-Yu Chien ◽  
Luo-Yi Wu ◽  
Chia-Rong Sheu ◽  
Che-Ju Hsu ◽  
Chi-Yen Huang ◽  
...  

2018 ◽  
Vol 31 (2) ◽  
pp. 1805544 ◽  
Author(s):  
Xihu Wu ◽  
Abhijith Surendran ◽  
Jieun Ko ◽  
Oliver Filonik ◽  
Eva M. Herzig ◽  
...  

Author(s):  
J. H. Nam ◽  
T. H. Yeon ◽  
G. H. Jang

Linear actuator has been widely used as vibration motor in mobile phones, and it generates a linear vibration through resonance in which the electromagnetic force with the application of a sinusoidal current excites the fundamental natural vibration mode of the moving mass-spring system. Figure 1 shows a linear actuator for mobile phones whose diameter and height are approximately 10 and 1 mm, respectively. The moving coil and mass are attached to a flat spring, and the radial magnetic field between the plate and the moving yoke is generated through a plate connected to the permanent magnet. The magnetic force in the air-gap between the plate and the yoke is generated according to Ampere’s law once the sinusoidal current is applied to the coil, and it excites the axial vibration mode of the linear actuator that generates the axial vibration. The linear actuators have a fast response time compared with other types of vibration motors. Currently, the response time of the linear actuators is approximately 50 msec, but the users and the application software of mobile phones are demanding increasingly faster response time. However, it is very difficult to reduce the response time while maintaining the vibration magnitude under the given constraints of volume and electric power.


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