研究目的
Investigating the application of cowpea-structured PVDF/ZnO nanofibers in flexible self-powered piezoelectric sensors for remote control of gestures in human-machine interactive systems.
研究成果
The cowpea-structured PVDF/ZnO nanofibers-based flexible self-powered piezoelectric sensor demonstrated excellent performance in both pressing and bending modes, with high sensitivity, fast response time, and good mechanical stability. Its application in remote control of robotic hands highlights its potential in human-machine interactive systems.
研究不足
The study focuses on the fabrication and initial testing of the sensor, with potential areas for optimization including the scalability of the electrospinning process and the long-term durability of the sensor under continuous use.
1：Experimental Design and Method Selection:
The study utilized electrospinning technology to produce cowpea-structured PVDF/ZnO nanofibers for the fabrication of flexible self-powered piezoelectric sensors.
2：Sample Selection and Data Sources:
Different proportions of ZnO and PVDF were dispersed in a mixture of acetone and dimethylacetamide (DMAC) to prepare precursor solutions for electrospinning.
3：List of Experimental Equipment and Materials:
Equipment included an electrospinning setup, SEM (JSM-7800F), TEM (JEM-2100), XRD (X Pert Mpd pro), Raman spectroscopy (RM2000), and FTIR (AVATAR360). Materials included PVDF, ZnO nanospheres, Ti3C2 (MXene), and polyurethane (PU) film for encapsulation.
4：0). Materials included PVDF, ZnO nanospheres, Ti3C2 (MXene), and polyurethane (PU) film for encapsulation. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The fabrication process involved electrospinning PVDF/ZnO nanofibers, spraying MXene water solution as electrodes, and encapsulating the device with PU film. Electrical performance was measured using a Keithley-6514 system electrometer and Stanford Research SR570 current preamplifier.
5：Data Analysis Methods:
Output signals were collected and analyzed using a Data Acquisition Card (NI PCI-6221), with sensitivity and response time calculated from the linear slope of the plot and rise/fall times, respectively.
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Low-noise voltage preamplifier
Keithley-6514 system electrometer
Keithley
Measuring the output voltage signals of PES.
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Low-noise current preamplifier
Stanford Research SR570
Stanford Research Systems
Measuring the output current signals of PES.
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Field emission scanning electron microscope
JSM-7800F
JEOL
Observing the morphology of synthesized materials.
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Transmission electron microscope
JEM-2100
JEOL
Observing the morphology of synthesized materials.
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X-ray diffraction technique
X Pert Mpd pro
PANalytical
Analyzing the structural properties of the as-spun film.
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Fourier transform infrared spectra
AVATAR360
Thermo Nicolet
Analyzing the crystallinity of PVDF/ZnO NFs.
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Confocal Raman spectroscopy
RM2000
Renishaw
Obtaining Raman spectrum at room temperature.
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Data Acquisition Card
NI PCI-6221
National Instruments
Collecting and analyzing the signals.
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