Journal ArticleDOI
Ultra‐thin anodic alumina capacitor films for plastic electronics
Andrei Ionut Mardare,Martin Kaltenbrunner,Niyazi Serdar Sariciftci,Siegfried Bauer,Achim Walter Hassel +4 more
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TLDR
In this article, the anodic alumina films were amorphous and acted as dielectric material in a solid state capacitor with Au top electrode, and the capacitors characteristics were evaluated using IV curves and frequency domain measurements.Abstract:
Ultrapure aluminium was thermally evaporated onto various plastics (polyethylene 2.6-naphthalate, PEN; polyethylene terephthalate, PET; polyimide, PI and glass for comparison) and potentiostatically anodized in a citric buffer. The anodisation procedure was monitored coulometrically and each alumina film formed was characterized by impedance spectroscopy. The resulting anodic alumina films were amorphous (proven by X-ray diffraction, XRD) and acted as dielectric material in a solid state capacitor with Au top electrode. The capacitors characteristics were evaluated using IV curves and frequency domain measurements. The performance of the capacitors demonstrated low leakage currents and low dielectric losses. The contrary properties capacity and breakdown voltage could be chosen by selecting the anodisation voltage. For each substrate apparent oxide formation factors and capacities were determined coulometrically. The ratio between apparent formation factor and projected area allowed determining the surface roughness. This surface roughness together with the high purity aluminium films and the anodisation compression was responsible for the unexpected high mechanical stability of this composite material.read more
Citations
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Journal ArticleDOI
An ultra-lightweight design for imperceptible plastic electronics
Martin Kaltenbrunner,Tsuyoshi Sekitani,Tsuyoshi Sekitani,Jonathan T. Reeder,Jonathan T. Reeder,Tomoyuki Yokota,Kazunori Kuribara,Takeyoshi Tokuhara,Michael Drack,Reinhard Schwödiauer,Ingrid Graz,Simona Bauer-Gogonea,Siegfried Bauer,Takao Someya,Takao Someya +14 more
TL;DR: In this paper, the authors present a platform that makes electronics both virtually unbreakable and imperceptible on polyimide polysilicon elastomers, which can be operated at high temperatures and in aqueous environments.
Journal ArticleDOI
25th Anniversary Article: A Soft Future: From Robots and Sensor Skin to Energy Harvesters
Siegfried Bauer,Simona Bauer-Gogonea,Ingrid Graz,Martin Kaltenbrunner,Martin Kaltenbrunner,Christoph Keplinger,Christoph Keplinger,Reinhard Schwödiauer +7 more
TL;DR: This review discusses soft robots which allow actuation with several degrees of freedom, and shows that different actuation mechanisms lead to similar actuators, capable of complex and smooth movements in 3d space.
Journal ArticleDOI
Printable elastic conductors with a high conductivity for electronic textile applications
Naoji Matsuhisa,Martin Kaltenbrunner,Martin Kaltenbrunner,Tomoyuki Yokota,Tomoyuki Yokota,Hiroaki Jinno,Kazunori Kuribara,Tsuyoshi Sekitani,Tsuyoshi Sekitani,Takao Someya,Takao Someya +10 more
TL;DR: A printable elastic conductor with a high initial conductivity and a record high conductivity when stretched to 215% strain is reported and the feasibility of inks is demonstrated by fabricating a stretchable organic transistor active matrix on a rubbery stretchability-gradient substrate with unimpaired functionality.
Journal ArticleDOI
Amorphous Alumina Nanoparticles: Structure, Surface Energy, and Thermodynamic Phase Stability
Amir H. Tavakoli,Pardha S. Maram,Scarlett J. Widgeon,Jorgen F. Rufner,Klaus van Benthem,Sergey V. Ushakov,Sabyasachi Sen,Alexandra Navrotsky +7 more
TL;DR: In this article, the authors provided a complete picture of the energy landscape of Al2O3 at the nanoscale, and directed this study toward understanding the energetics of amorphous alumina.
Journal ArticleDOI
Intrinsically stretchable and rechargeable batteries for self-powered stretchable electronics
Gerald Kettlgruber,Martin Kaltenbrunner,Christian M. Siket,Richard Moser,Ingrid Graz,Reinhard Schwödiauer,Siegfried Bauer +6 more
TL;DR: In this paper, a soft matter based rechargeable electrochemical power storage element for stretchable electronic circuits is presented, which is based on a rechargeable alkaline manganese battery concept.
References
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Plastic Solar Cells
TL;DR: In this article, the photo-induced electron transfer leads to a number of potentially interesting applications, which include sensitization of the photoconductivity and photovoltaic phenomena, and their potential in terrestrial solar energy conversion discussed.
Journal ArticleDOI
Flexible organic transistors and circuits with extreme bending stability
TL;DR: This work demonstrates organic transistors and complementary circuits that continue to operate without degradation while being folded into a radius of 100 μm, enabled by a very thin plastic substrate, an atomically smooth planarization coating and a hybrid encapsulation stack that places the transistors in the neutral strain position.
Journal ArticleDOI
Thin anodic oxide layers on aluminium and other valve metals: high field regime
TL;DR: The formation kinetics and electric properties of anodic barrier oxides on Al, Hf, Nb, Ta, Ti, and Zr depend on the migration of ions, controlled by an electric field strength of up to 107 V cm−1.
Book
Flexible Electronics: Materials and Applications
William S. Wong,Alberto Salleo +1 more
TL;DR: Flexible Electronics: Materials and Applications as discussed by the authors surveys the materials systems and processes that are used to fabricate devices that can be employed in a wide variety of applications, including flexible flat-panel displays, medical image sensors, photovoltaics, and electronic paper.
Journal ArticleDOI
Flexible supercapacitor based on polyaniline nanowires/carbon cloth with both high gravimetric and area-normalized capacitance
Ying Ying Horng,Ying Ying Horng,Yi Chen Lu,Yi Chen Lu,Yu-Kuei Hsu,Chia Chun Chen,Chia Chun Chen,Li-Chyong Chen,Kuei-Hsien Chen,Kuei-Hsien Chen +9 more
TL;DR: In this paper, a flexible supercapacitor is successfully fabricated using polyaniline nanowires/carbon cloth (PANI-NWs/CC) nanocomposite.