scholarly journals Active PZT Composite Microfluidic Channel for Bioparticle Manipulation

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2020 ◽  
Author(s):  
Janusas ◽  
Pilkauskas ◽  
Janusas ◽  
Palevicius
Keyword(s):  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Copper Foil ◽  
Screen Printing ◽  
Water Drop ◽  
Free Particle ◽  
Microfluidic Channel ◽  
Polyvinyl Butyral ◽  
Lead Zirconate ◽  
Bottom Surface

The concept of active microchannel for precise manipulation of particles in biomedicine is reported in this paper. A novel vibration-assisted thermal imprint method is proposed for effective formation of a microchannel network in the nanocomposite piezo polymer layer. In this method, bulk acoustic waves of different wavelengths excited in an imprinted microstructure enable it to function in trapping–patterning, valve, or free particle passing modes. Acoustic waves are excited using a special pattern of electrodes formed on its top surface and a single electric ground electrode formed on the bottom surface. To develop the microchannel, we first started with lead zirconate titanate (PZT) nanopowder [Pb (Zrx, Ti1–x) O3] synthesis. The PZT was further mixed with three different binding materials—polyvinyl butyral (PVB), poly(methyl methacrylate) (PMMA), and polystyrene (PS)—in benzyl alcohol to prepare a screen-printing paste. Then, using conventional screen printing techniques, three types of PZT coatings on copper foil substrates were obtained. To improve the voltage characteristics, the coatings were polarized. Their structural and chemical composition was analyzed using scanning electron microscope (SEM), while the mechanical and electrical characteristics were determined using the COMSOL Multiphysics model with experimentally obtained parameters of periodic response of the layered copper foil structure. The hydrophobic properties of the PZT composite were analyzed by measuring the contact angle between the distilled water drop and the three different polymer composites: PZT with PVB, PZT with PMMA, and PZT with PS. Finally, the behavior of the microchannel formed in the nanocomposite piezo polymer was simulated by applying electrical excitation signal on the pattern of electrodes and then analyzed experimentally using holographic interferometry. Wave-shaped vibration forms of the microchannel were obtained, thereby enabling particle manipulation.

An Ultrasound Transducer by Lead Zirconate Titanate (PZT) Nanofibers

2011 ◽  
Author(s):  
Guitao Zhang ◽  
Yong Shi
Keyword(s):  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Average Diameter ◽  
Lead Zirconate ◽  
Ultrasound Transducer ◽  
Resonant Frequencies ◽  
Pulse Delay ◽  
Zirconate Titanate ◽  
Electrospinning Method ◽  
Assumed Mode

In this paper, we demonstrate Lead zirconate titanate (PZT) nanofibers as a transducer to generate and detect ultrasound acoustic waves. PZT nanofibers with average diameter of 102nm were fabricated by the electrospinning method. The as-fabricated nanofibers were collected and aligned across a 10 μm silicon trench with Au electrodes. After annealing, the device was tested with the pulse/delay method. Two resonant frequencies, 8 MHz and 13MHz, were detected respectively. By using the Hamilton’s principle for coupled electromechanical systems with properly assumed mode shape, the resonant frequency was caudated. Base on the current testing result, a broadband ultrasound transducer was envisioned.

Linear and Nonlinear Analysis of Additively Manufactured Material With Different Porosity Induced by Varying Material Printing Speed Using Guided Acoustic Waves

2021 ◽  
Author(s):  
SeHyuk Park ◽  
Hamad Alnuaimi ◽  
Anna Hayes ◽  
Madison Sitkiewicz ◽  
Umar Amjad ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Nonlinear Analysis ◽  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Scanning Speed ◽  
Lead Zirconate ◽  
Nonlinear Ultrasonic ◽  
Scan Speed ◽  
Linear And Nonlinear ◽  
Characterization Of Materials

Abstract Guided acoustic wave based techniques have been found to be very effective for damage detection, and both quantitative and qualitative characterization of materials. In this research, guided acoustic wave techniques are used for porosity evaluation of additively manufactured materials. A metal 3D printer, Concept Laser Mlab 200 R Cusing™, is used to manufacture 316L additively manufactured (AM) stainless steel specimens. Two levels of porosity are investigated in this study, which was controlled by a suitable combination of scan speed and laser power. The sample with lower level of porosity is obtained with a low scanning speed. Lead Zirconate Titanate (PZT) transducers are used to generate guided acoustic waves. The signal is excited and propagated through the specimens in a single sided transmission mode setup. Signal processing of the recorded signals for damage analysis involves both linear and nonlinear analyses. Linear ultrasonic parameters such as the time-of-flight and magnitude of the propagating waves are recorded. The nonlinear ultrasonic parameter, the Sideband Peak Count Index (SPC-I) is obtained by a newly developed nonlinear analysis technique. Results obtained for both specimens are analyzed and compared using both linear and nonlinear ultrasonic techniques. Finally, the effectiveness of SPC-I technique in monitoring porosity levels in AM specimens is discussed.

scholarly journals Theoretical and experimental analysis on deflection control of photovoltaic-electrostatic cantilever beam

2019 ◽  
Vol 11 (7) ◽  
pp. 168781401986328
Author(s):  
Yujuan Tang ◽  
Yusong Chen ◽  
Xinjie Wang ◽  
Zhong Yang
Keyword(s):  
Light Intensity ◽  
Cantilever Beam ◽  
Lead Zirconate Titanate ◽  
Copper Foil ◽  
Lead Zirconate ◽  
Electrical Model ◽  
Zirconate Titanate ◽  
Lead Zirconate Titanate Ceramic ◽  
The Mathematical Model ◽  
Titanate Ceramic

A model of photovoltaic-electrostatic cantilever beam based on lanthanum-modified lead zirconate titanate ceramic is proposed in this article. New equivalent electrical model of lanthanum-modified lead zirconate titanate ceramic connected to a parallel plate composed of two copper foils is obtained by modifying the original lanthanum-modified lead zirconate titanate equivalent electrical model. After that, the mathematical model of photovoltaic-electrostatic cantilever beam is established. Furthermore, the influences of ultraviolet light intensity and copper foil length on the deflection of the photovoltaic-electrostatic cantilever beam are analyzed via the theoretical and experimental methods. The analysis results indicate that the deflection at the free end of cantilever beam increases with the increase in light intensity and length of the copper foil. The photovoltaic-electrostatic flexible cantilever beam can be taken as a micro-actuator with the advantages of remote control and clean drive.

scholarly journals Arrangement of Live Human Cells through Acoustic Waves Generated by Piezoelectric Actuators for Tissue Engineering Applications

2020 ◽  
Vol 10 (10) ◽  
pp. 3477
Author(s):  
Marialaura Serzanti ◽  
Marco Baù ◽  
Marco Demori ◽  
Serena Calamaio ◽  
Manuela Cominelli ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Piezoelectric Actuators ◽  
Lead Zirconate ◽  
Fibrin Clot ◽  
Human Cells ◽  
Al2o3 Substrate ◽  
Resonant Frequencies ◽  
Plate Waves ◽  
Interdigital Transducer

In this paper, the possibility to steer and confine live human cells by means of acoustic waves, such as flexural plate waves (FPWs), generated by piezoelectric actuators applied to non-piezoelectric substrates, has been explored. A device with two lead zirconate titanate (PZT) actuators with an interdigital transducer (IDT) screen-printed on an alumina (Al2O3) substrate has been fabricated and tested. The experimental results show that, by exciting the actuators at their resonant frequencies, FPW modes are generated in the substrate. By exploiting the device, arrangements of cells on lines at frequency-dependent distances have been obtained. To maintain the alignment after switching off the actuator, cells were entrapped in a fibrin clot that was cultured for several days, enabling the formation of cellular patterns.

Characteristics of lead zirconate titanate ferroelectric thick films from a screen-printing laser transfer method

2005 ◽  
Vol 87 (19) ◽  
pp. 192902 ◽  
Author(s):  
Baomin Xu ◽  
David White ◽  
James Zesch ◽  
Alexandra Rodkin ◽  
Steve Buhler ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Screen Printing ◽  
Thick Films ◽  
Lead Zirconate ◽  
Laser Transfer ◽  
Zirconate Titanate ◽  
Transfer Method

scholarly journals Design of Controllable Novel Piezoelectric Components for Microfluidic Applications

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 4049 ◽  
Author(s):  
Elingas Cekas ◽  
Giedrius Janusas ◽  
Asta Guobiene ◽  
Arvydas Palevicius ◽  
Andrius Vilkauskas ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Piezoelectric Ceramic ◽  
Piezoelectric Properties ◽  
Ceramic Matrix ◽  
Polyvinyl Butyral ◽  
Lead Zirconate ◽  
Different Types ◽  
Mechanical Devices ◽  
Functional Components ◽  
Piezoelectric Characteristics

This paper reviews recent investigations and achievements in the design of controllable functional components for improving microfluidic systems, its effectiveness, and functionality. The main purpose was to design novel microstructures with piezoelectric properties (microresonators), which enable one to control the effectiveness of fluid flow in micro-hydro-mechanical devices for biomedical/biochemical purposes. Controllable properties were obtained by incorporating different types of binders in a piezoelectric ceramic matrix (lead zirconate titanate): polyvinyl butyral (PVB), poly methyl methacrylate (PMMA), and polystyrene (PS). The change in chemical composition of PZT helps to manipulate the piezoelectric characteristics, surface morphology, mechanical properties, etc., of the designed microfluidic element with the microstructure in it.

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