Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

Aditya Vasan; William Connacher; James Friend

doi:10.3791/61015

تصنيع وتوصيف من سماكة وضع الأجهزة الكهروضوئية للانحلال وAcoustofluidics

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JoVE Journal Engineering

Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics

تصنيع وتوصيف من سماكة وضع الأجهزة الكهروضوئية للانحلال وAcoustofluidics

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10:39 min

August 5, 2020

DOI: 10.3791/61015-v

Aditya Vasan¹, William Connacher¹, James Friend¹

¹Medically Advanced Devices Laboratory, Center for Medical Devices, Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering and Department of Surgery, School of Medicine,University of California San Diego, ²Department of Surgery, School of Medicine,University of California San Diego

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Overview

This article describes the fabrication of piezoelectric thickness mode transducers using direct current sputtering on lithium niobate. It also discusses the characterization of these transducers through various analytical techniques.

Key Study Components

Area of Science

Neuroscience
Biophysics
Biomedical Engineering

Background

Thickness mode transducers can be used for atomization.
Characterization techniques include impedance analysis and laser doppler vibrometry.
Understanding resonance frequency and vibrational modes is crucial for device performance.
These devices have potential applications in drug atomization for respiratory diseases.

Purpose of Study

To develop reliable piezoelectric transducers for atomization.
To quantify the effects of independent variables on transducer performance.
To explore the dynamics of droplet atomization.

Methods Used

Direct current sputtering for electrode fabrication.
Impedance analysis for performance characterization.
Laser doppler vibrometry for measuring vibration.
High-speed imaging to observe atomization phenomena.

Main Results

Reliable operation of transducers was achieved with a custom holder and fluid supply system.
Characterization methods provided insights into resonance frequency and vibration amplitude.
Experimental adjustments influenced atomization behavior significantly.
Data supports the development of devices for treating respiratory diseases.

Conclusions

The study successfully demonstrates the fabrication and characterization of piezoelectric transducers.
Findings can inform future designs for drug atomization devices.
Further research is needed to optimize continuous atomization processes.

Frequently Asked Questions

What are piezoelectric thickness mode transducers?

They are devices that convert electrical energy into mechanical vibrations, useful for atomization.

How does direct current sputtering work?

It is a technique used to deposit thin films of material onto a substrate.

What applications do these transducers have?

They can be used for atomizing drugs in medical treatments, particularly for respiratory conditions.

What methods were used to characterize the transducers?

Impedance analysis, laser doppler vibrometry, and high-speed imaging were employed.

What challenges are associated with continuous atomization?

Balancing multiple factors such as power input and wick orientation can be complex.

What is the significance of resonance frequency?

It determines how effectively the transducer can vibrate and atomize fluids.

How can the findings of this study be applied?

They can guide the design of more efficient atomization devices for medical use.

يتم وصف تصنيع محولات وضع سماكة الكهرزوئية عبر التخبط الحالي المباشر من أقطاب اللوحة على niobate الليثيوم. بالإضافة إلى ذلك، يتم تحقيق عملية موثوقة مع حامل محول ونظام إمدادات السوائل ويتم إثبات التوصيف عن طريق تحليل المعاوقة، الليزر دوبلر vibrometry، والتصوير عالي السرعة، وتوزيع حجم القطرات باستخدام تشتت الليزر.

يمكن استخدام هذه التقنيات للإجابة على الأسئلة حول تردد الرنين ، والإثارة وضع الاهتزاز ، وسعة الاهتزاز ، وكيف يمكن أن تكون محولات مع هذه الخصائص أداء المرذاذ. مع المعلومات التي توفرها هذه التحليلات، من الممكن تحديد آثار المتغيرات المستقلة والتجارب التي تنطوي على محولات وضع سمك بدقة. هذه التقنية تمكن من تطوير الأجهزة التي يمكن استخدامها لتفتيت الأدوية لعلاج أمراض الجهاز التنفسي مثل الالتهاب الرئوي.

هذه الطرق مفيدة لإضفاء طابع ظواهر الانحلال ويمكن تطبيقها على دراسة الموجات الشعرية على سطح قطرة. ولأن العديد من العوامل المتنافسة يجب أن تكون متوازنة، فقد يكون من الصعب تحقيق الانحلال المستمر. ضبط مدخلات الطاقة، موقف الفتيل والتوجه الفتيل ومراقبة كيفية تغيير السلوك.

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