All inkjet printed piezoelectric polymer actuators for microfluidic lab-on-a-chip systems / Oliver Pabst

Printing technologies for the fabrication of electronic components have emerged in recent years and have attracted interest due to their capabilities of cost-effective material deposition and their suitability for large-area coatings. In this thesis, the benefits of inkjet printing technologies are used to manufacture piezoelectric actuators that are suitable for integration in polymer-based, disposable microfluidic lab-on-a-chip (LOC) systems. Based on analytical models of actuator behavior, piezoelectric actuators with poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) as the active material are inkjet printed and characterized in detail for the first time here. The thermal treatment applied to the P(VDF-TrFE) films exhibits a significant influence on device performance and morphology. Annealing at temperatures between 110 and 140 °C yields distinct piezoelectric behavior. These findings are employed to demonstrate the function of a membrane pump with an inkjet printed actuator with pump rates up to 130 µL/min, which is suitable for applications in LOC systems. Compared to the state-of-the-art, the manufacturing approach introduced here as well as the established knowledge about the behavior of inkjet printed P(VDF-TrFE) actuators are novel. The low processing temperatures and the use of digital printing technologies lead to cost-effective processing compared to conventional, lithography- and vacuum-based manufacturing approaches. Different from most current micropumps, an additional assembly step is not required, which would be necessary when an actuator is manufactured separately and then attached to the pump membrane. Furthermore, the manufacturing approach and design introduced here are compatible with processes and materials that are used in LOC systems. They allow a cost-effective integration of further functionalities, leading to a higher degree of integration and thus smarter systems.

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Person: Pabst, Oliver [Author]
Corporate Author: Friedrich-Schiller-Universität Jena [Degree granting institution]
Format: Book
Language(s):English
Publication:Jena, 2014
Printing place:Jena
Dissertation Note:Jena, Univ., Diss., 2014
Subjects:Tintenstrahldruck > Piezoelektrischer Aktor
Type of content:Hochschulschrift
Related resources:Erscheint auch als Online-Ausgabe: All inkjet printed piezoelectric polymer actuators for microfluidic lab-on-a-chip systems
Physical description:II, 95, XXIV Bl : Ill., graph. Darst ; 30 cm
Basic Classification: 53.51 Bauelemente der Elektronik