研究目的
Investigating the fabrication and integration of one-dimensional (1D) piezoelectric nanotubes for producing high frequency nanotube array ultrasonic transducers for high resolution ultrasonic imaging.
研究成果
The study demonstrates that high performance high frequency ultrasonic transducers enabled by high quality 1D piezoelectric nanostructures are promising for generating technical breakthrough for high resolution ultrasonic and photoacoustic imaging.
研究不足
The major challenges include the difficulties in obtaining large area of well-aligned nanostructures with a high yield and appropriate assembly of the nanostructures for achieving the desired performance at the high frequency device level.
1：Experimental Design and Method Selection:
The study involved the fabrication of piezoelectric poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) nanotube array through a template-based method using ordered anodized alumina membrane (AAM) as the template.
2：Sample Selection and Data Sources:
Ordered AAM with depths of 4 μm and 1 μm were prepared using a two-step anodization method.
3：List of Experimental Equipment and Materials:
P(VDF-TrFE) pellets, dimethyl-formamide (DMF), acetone, anodized alumina membrane (AAM), copper chloride solution, phosphoric acid solution.
4：Experimental Procedures and Operational Workflow:
The nanotube structure was formed by filling the piezoelectric polymer into the nanopores of AAM through spin-coating and melt-filling processes.
5：Data Analysis Methods:
The performance of piezoelectric nanotube array for ultrasonic transducer application was characterized in terms of bandwidth and sensitivity through pulse-echo measurements.
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