Piezoelectric Potential Distribution in a Bent ZnO Nanorod Cantilever

2011 ◽  
Vol 694 ◽  
pp. 23-27
Author(s):  
Zheng Zheng Shao ◽  
Xue Ao Zhang ◽  
Fei Wang ◽  
Guang Wang ◽  
Hong Hui Jia ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Cross Section ◽  
Electric Potential ◽  
Potential Distribution ◽  
Piezoelectric Effect ◽  
Longitudinal Direction ◽  
Lateral Force ◽  
Negative Potential ◽  
Zno Nanorod ◽  
Piezoelectric Potential

The piezoelectric potential generated in a bent ZnO nanorod cantilever is analyzed by means of the first piezoelectric effect approximation. The results show that the piezoelectric potential in the nanorod is proportional to lateral force but is independent along the longitudinal direction. And the electric potential in the tensile area and that of compressive area are antisymmetric in cross section of the nanorod, which makes the nanorod become a "parallel plated capacitor" for piezoelectric nanodevices, such as nanogenerator. The investigation of the carriers influence on the piezoelectric potential in a bent ZnO nanorod reveals that the positive piezoelectric potential in stretched side of the bent nanorod is significantly screened by the carriers and the negative potential in compressed side is well preserved when considering a moderate carrier concentration of

Influence of carrier concentration on piezoelectric potential in a bent ZnO nanorod

2010 ◽  
Vol 108 (12) ◽  
pp. 124312 ◽  
Author(s):  
Zhengzheng Shao ◽  
Liaoyong Wen ◽  
Dongmin Wu ◽  
Xueao Zhang ◽  
Shengli Chang ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Zno Nanorod ◽  
Piezoelectric Potential

scholarly journals Nonlinear effect of carrier drift on the performance of an n-type ZnO nanowire nanogenerator by coupling piezoelectric effect and semiconduction

2018 ◽  
Vol 9 ◽  
pp. 1917-1925 ◽  
Author(s):  
Yuxing Liang ◽  
Shuaiqi Fan ◽  
Xuedong Chen ◽  
Yuantai Hu
Keyword(s):  
Carrier Concentration ◽  
Cross Section ◽  
Electric Fields ◽  
Electric Charge ◽  
Opposite Effect ◽  
Piezoelectric Effect ◽  
Axial Direction ◽  
Zno Nanowire ◽  
Electrode Size ◽  
Piezoelectric Semiconductors

In piezoelectric semiconductors, electric fields drive carriers into motion/redistribution, and in turn the carrier motion/redistribution has an opposite effect on the electric field itself. Thus, carrier drift in a piezoelectric semiconducting structure is essentially nonlinear unless the induced fluctuation of carrier concentration is very small. In this paper, the nonlinear governing equation of carrier concentration was established by coupling both piezoelectric effect and semiconduction. A nonlinear carrier-drift effect on the performance of a ZnO nanogenerator was investigated in detail and it was elucidated that carrier motion/redistribution occurs in the ZnO nanowire (ZNW) cross section while there is no carrier motion in the axial direction. At the same time, we noted that the amplitude of boundary electric charge grows with increasing deformation, but the peaks of boundary electric charge do not appear at the cross-section endpoints. Thus, in order to effectively improve the performance of the ZNW nanogenerator, the effect of electrode configuration on the piezoelectric potential difference and output power was analyzed in detail. The electrode size for the optimal performance of a ZnO nanowire generator was proposed. This analysis that couples electromechanical fields and carrier concentration as a whole has some referential significance to piezotronics.

scholarly journals Quantitative Observation of Electric Potential Distribution of Brittle Polyelectrolyte Hydrogels Using Microelectrode Technique

2016 ◽  
Vol 49 (8) ◽  
pp. 3100-3108 ◽  
Author(s):  
Honglei Guo ◽  
Takayuki Kurokawa ◽  
Masakazu Takahata ◽  
Wei Hong ◽  
Yoshinori Katsuyama ◽  
...  
Keyword(s):  
Electric Potential ◽  
Potential Distribution ◽  
Electric Potential Distribution ◽  
Microelectrode Technique

scholarly journals Observation of Electric Potential Distribution in Model Capacitor Sample Using Electron Holography

2012 ◽  
Vol 53 (4) ◽  
pp. 696-699 ◽  
Author(s):  
Ryuichi Kuramae ◽  
Hiroyuki Ono ◽  
Yoshinori Fujikawa ◽  
Yasukazu Murakami ◽  
Daisuke Shindo
Keyword(s):  
Electric Potential ◽  
Potential Distribution ◽  
Electron Holography ◽  
Electric Potential Distribution

Enhanced selectivity of methane production for photocatalytic reduction by the piezoelectric effect

2017 ◽  
Vol 53 (70) ◽  
pp. 9765-9768 ◽  
Author(s):  
Kaiqiang Wang ◽  
Zhibin Fang ◽  
Xueyan Huang ◽  
Wenhui Feng ◽  
Yaozhu Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ultrasonic Irradiation ◽  
Methane Production ◽  
Piezoelectric Effect ◽  
Photocatalytic Reduction ◽  
Piezoelectric Potential ◽  
Piezoelectric Semiconductors ◽  
Enhanced Selectivity

Under simultaneous full arc light and ultrasonic irradiation, photo-generated electrons are brought together by piezoelectric potential, and thus dense electrons induce the reduction of carbon dioxide on the surface of piezoelectric semiconductors, resulting in an improved selectivity of methane production to a greater degree.

scholarly journals Validation of the stream function method used for reconstruction of experimental ionospheric convection patterns

2000 ◽  
Vol 18 (4) ◽  
pp. 454-460
Author(s):  
P.L. Israelevich ◽  
V. O. Papitashvili ◽  
A. I. Ershkovich
Keyword(s):  
Boundary Value Problem ◽  
Boundary Conditions ◽  
Stream Function ◽  
Electric Fields ◽  
Electric Potential ◽  
Potential Distribution ◽  
Function Method ◽  
Polar Cap ◽  
Ionospheric Convection ◽  
Convection Patterns

Abstract. In this study we test a stream function method suggested by Israelevich and Ershkovich for instantaneous reconstruction of global, high-latitude ionospheric convection patterns from a limited set of experimental observations, namely, from the electric field or ion drift velocity vector measurements taken along two polar satellite orbits only. These two satellite passes subdivide the polar cap into several adjacent areas. Measured electric fields or ion drifts can be considered as boundary conditions (together with the zero electric potential condition at the low-latitude boundary) for those areas, and the entire ionospheric convection pattern can be reconstructed as a solution of the boundary value problem for the stream function without any preliminary information on ionospheric conductivities. In order to validate the stream function method, we utilized the IZMIRAN electrodynamic model (IZMEM) recently calibrated by the DMSP ionospheric electrostatic potential observations. For the sake of simplicity, we took the modeled electric fields along the noon-midnight and dawn-dusk meridians as the boundary conditions. Then, the solution(s) of the boundary value problem (i.e., a reconstructed potential distribution over the entire polar region) is compared with the original IZMEM/DMSP electric potential distribution(s), as well as with the various cross cuts of the polar cap. It is found that reconstructed convection patterns are in good agreement with the original modelled patterns in both the northern and southern polar caps. The analysis is carried out for the winter and summer conditions, as well as for a number of configurations of the interplanetary magnetic field.Key words: Ionosphere (electric fields and currents; plasma convection; modelling and forecasting)

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