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＂Fluidic Diode＂ for Passive Unidirectional Liquid Transport Bioinspired by the Spermathecae of Fleas

Journal of Bionic Engineering 2018年第1期15卷 42-56页

作者： Gerda Buchberger Alexander Kogler Agnes Weth Richard Baumgartner Philipp Comanns siegfried bauer Werner Baumgartner Institute of Biomedical Mechatronics Johannes Kepler University Linz Altenberger Str. 69 A-4040 Linz Austria institute of Experimental Physics Department of Soft Matter Physics Johannes Kepler University Linz Altenberger Str. 69 A-4040 Linz Austria Institute of Biology II RWTH Aachen University Worringerweg 3 D-52074 Aachen Germany

We present a device for passive unidirectional liquid transport. The capillary channels used are bioinspired by the shape of the spermathecae （receptaculum seminis） of rabbit fleas （Spilopsyllus cuniculi） and rat fleas （Xenopsytla cheopis）. The spermatheca is an organ of female fleas that stores sperm until suitable conditions to lay eggs are found. We translated and multiplied the natural form and function of a spermatheca to create a continuous capillary system from which we designed our microfluidic device based directly on the model from nature. Applying the Young-Laplace equation, we derived a theoretical description of local liquid transport, which enables model-guided design. We arranged the bioinspired capillaries in parallel and engraved them in poly（methyl methacrylate）（PMMA） plates by CO2 laser ablation. The fabricated structures transport soapy water passively （i.e., without external energy input） in the forward direction at velocities of about 1 mm＇s i while halting the liquid fronts completely in the backward direction. The bio- inspired capillary channels are capable of unidirectional liquid transport against gravity. Distance and velocity measurements prove the feasibility of the concept. Unidirectional passive liquid transport might be advantageous in technical surfaces for liquid man- agement, for instance, in biomedical microfluidics, lab-on-chip, lubrication, electronics cooling and in micro-analysis devices.

关键词： liquid diode wetting passive unidirectional liquid transport capillary bioinspired

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Direct writing of anodic oxides for plastic electronics

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npj Flexible Electronics 2018年第1期2卷 189-198页

作者： Christian Michael Siket Nadine Tillner Andrei Ionut Mardare Amir Reuveny Carina Daniela Grill Florian Hartmann Gerald Kettlgruber Richard Moser Jan Philipp Kollender Takao Someya Achim Walter Hassel Martin Kaltenbrunner siegfried bauer Soft Matter Physics Johannes Kepler University LinzAltenberger Str.694040 LinzAustria Department of Electrical Engineering University of TokyoTokyo 113-8656Japan Institute for Technology of Inorganic Materials Johannes Kepler University LinzAltenberger Str.694040 LinzAustria Christian Doppler Laboratory for Combinatorial Oxide Chemistry(COMBOX) Johannes Kepler University LinzAltenberger Str.694040 LinzAustria Linz Institute of Technology LIT Johannes Kepler University LinzAltenberger Str.694040 LinzAustria

Metal oxide thin films for soft and flexible electronics require low cost,room temperature fabrication,and structuring *** here introduce an anodic printing process to realize the essential building blocks of electronic circuitry,including resistors,capacitors,field-effect transistors,diodes,rectifiers,and memristors directly on imperceptible plastic *** independent on surface properties,we achieve high-quality,few nanometer thin dielectric and semiconducting films even on rough substrates via localized anodisation of valve metals using a scanning droplet cell *** demonstrate printing-like fabrication of 3D multilayer solid-state capacitors with a record-high areal capacity of 4μF cm−*** to the whole class of valve metals and their alloys,our method provides a versatile fabrication technique for the circuits that empower the flexible and stretchable electronics of tomorrow.

关键词： anodic printing metals

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Erratum to:“Fluidic Diode”for Passive Unidirectional Liquid Transport Bioinspired by the Spermathecae of Fleas

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Journal of Bionic Engineering 2021年第3期18卷 733-733页

作者： Gerda Buchberger Alexander Kogler Agnes Weth Richard Baumgartner Philipp Comanns siegfried bauer Werner Baumgartner Institute of Biomedical Mechatronics Johannes Kepler University LinzAltenberger Str.69A-4040 LinzAustria Institute of Experimental Physics Department of Soft Matter PhysicsJohannes Kepler University LinzAltenberger Str.69A-4040 LinzAustria Institute of Biology II RWTH Aachen UniversityfVorringerweg 3D-52074 AachenGermany

The article““Fluidic Diode”for Passive Unidirectional Liquid Transport Bioinspired by the Spermathecae of Fleas”,written by Gerda Buchberger,Alexander Kogler,Agnes Weth,Richard Baumgartner,Philipp Comanns,siegfried bauer,Werner Baumgartner,was originally published electronically on the publisher’s internet portal(currently SpringerLink)on January 20th 2018 without open *** the authors(s)' decision to opt for Open Choice the copyright of the article changed in October 2020 to©The Author(s)2020 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License(http://***/licenses/by/4.0/),which permits use,duplication,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s)and the source,provide a link to the Creative Commons license and indicate if changes were made.

关键词： directional license creative

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