Electrical Impedance Matching of PZT NanoGenerators

2017 ◽  
Author(s):  
Richard Galos ◽  
Yong Shi ◽  
Zhongjing Ren ◽  
Hao Sun
Keyword(s):  
Power Output ◽  
Electrical Impedance ◽  
Impedance Matching ◽  
Low Frequency ◽  
Load Impedance ◽  
Impedance Measurements ◽  
Conductive Afm ◽  
Nanofiber Diameter ◽  
Internal Impedance ◽  
Self Powered

PZT nanofibers are piezoelectric and can produce a relatively high electrical output under strain that is useful for self-powered nanogenerators. To obtain maximum power output from these devices, their internal impedance needs to be matched with their applicable load impedance. Electrical impedance measurements of PZT nanofibers were performed using a variety of methods over a frequency spectrum ranging from DC to 3.0 GHz. These methods include Conductive AFM and Scanning Microwave Impedance Microscopy. Nanofibers formed by electro-spinning with diameters ranging from 3 to 150 nm were collected and measured. The nanofiber impedance was extremely high at low frequency, decreased considerably at higher frequency and varied with nanofiber diameter as well. The results are applicable for the analysis of many types of nanogenerators and nanosensors including those produced at Stevens.

Electrical Impedance Measurements of PZT Nanofiber Sensors

2016 ◽  
Author(s):  
Richard Galos ◽  
Xin Li
Keyword(s):  
Dielectric Constant ◽  
Material Properties ◽  
Electrical Impedance ◽  
Impedance Measurement ◽  
Low Frequencies ◽  
Impedance Measurements ◽  
Conductive Afm ◽  
Electrical Impedance Measurement ◽  
Microfabrication Techniques

Electrical Impedance Measurement of PZT Nanofiber sensors are performed and material properties including resistivity and dielectric constant are derived from the measurements. Nanofibers formed by electro-spinning with diameters ranging from 10 to 150 nm were collected and integrated into sensors using microfabrication techniques. The nanosensor impedance was extremely high at low frequencies and special matching circuitry was fabricated to detect output. The resulting impedance measurements are also compared with those of individual nanofibers that were tested using Scanning Conductive Microscopy (SCM) and Conductive AFM.

scholarly journals Estimation of Acoustic Power Output from Electrical Impedance Measurements

Acoustics ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 37-50
Author(s):  
Gergely Csány ◽  
Michael Gray ◽  
Miklós Gyöngy
Keyword(s):  
Power Output ◽  
High Intensity ◽  
Electrical Impedance ◽  
Focused Ultrasound ◽  
Low Cost ◽  
Acoustic Power ◽  
High Intensity Focused Ultrasound ◽  
Ultrasound Transducers ◽  
Impedance Measurements ◽  
Primary Advantage

A method is proposed for estimating the acoustic power output of ultrasound transducers using a two-port model with electrical impedance measurements made in three different propagation media. When evaluated for two high-intensity focused ultrasound transducers at centre frequencies between 0.50 and 3.19 MHz, the resulting power estimates exceeded acoustic estimates by 4.5–21.8%. The method was shown to be valid for drive levels producing up to 20 MPa in water and should therefore be appropriate for many HIFU (high-intensity focused ultrasound) applications, with the primary advantage of employing relatively low-cost, non-specialist materials and instrumentation.

scholarly journals Electrical Impedance Measurements of PZT Nanofiber Sensors

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Richard Galos ◽  
Yong Shi ◽  
Zhongjing Ren ◽  
Liang Zhou ◽  
Hao Sun ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Frequency Spectrum ◽  
Material Properties ◽  
Input Impedance ◽  
Electrical Impedance ◽  
Low Noise ◽  
Impedance Measurements ◽  
Conductive Afm ◽  
Microfabrication Techniques

Electrical impedance measurements of PZT nanofiber sensors were performed using a variety of methods over a frequency spectrum ranging from DC to 1.8 GHz. The nanofibers formed by electrospinning with diameters ranging from 10 to 150 nm were collected and integrated into sensors using microfabrication techniques. Special matching circuits with ultrahigh input impedance were fabricated to produce low noise, measurable sensor outputs. Material properties including resistivity and dielectric constant are derived from the impedance measurements. The resulting material properties are also compared with those of individual nanofibers being tested using conductive AFM and Scanning Conductive Microscopy.

A Self‐Powered Gas Sensor Based on Coupling Triboelectric Screening and Impedance Matching Effects

2021 ◽  
pp. 2100310
Author(s):  
Sainan Liu ◽  
Guotao Yuan ◽  
Yi Zhang ◽  
Lingjie Xie ◽  
Qingqing Shen ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Impedance Matching ◽  
Self Powered

scholarly journals Design of a Broadband Electrical Impedance Matching Network for Piezoelectric Ultrasound Transducers Based on a Genetic Algorithm

Sensors ◽  
2014 ◽  
Vol 14 (4) ◽  
pp. 6828-6843 ◽  
Author(s):  
Jianfei An ◽  
Kezhu Song ◽  
Shuangxi Zhang ◽  
Junfeng Yang ◽  
Ping Cao
Keyword(s):  
Genetic Algorithm ◽  
Electrical Impedance ◽  
Impedance Matching ◽  
Ultrasound Transducers ◽  
Matching Network
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