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European Conference on Antennas and Propagation, EuCAP

作者： Alejandro Jiménez-Sáez Martin Schüßler Damian Pandel Christopher Krause Yixiong Zhao Gerd vom Bögel Niels Benson Rolf Jakoby Institute of Microwave Engineering and Photonics Technische Universität Darmstadt Darmstadt Germany Institute of Technology for Nanostructures and CENIDE University of Duisburg-Essen Duisburg Germany Fraunhofer Institute for Microelectronic Circuits and Systems Duisburg Germany

ISBN: (数字)9788831299008

ISBN: (纸本)9781728137124

This paper discusses a temperature-dependent characterization of deep reactive ion-etched 10 kΩ cm high-resistive silicon (DRIE HR-Si), 3D printed alumina (Al 2 O 3 ) and milled Rogers RT/Duroid ® 6010.2LM. The characterization is performed by measuring high-Q photonic crystal resonator samples in W-band and the measurements are taken from 30 °C to 115 °C. HR-Si is the material with the lowest losses at room temperature. However, its losses increase with temperature and become higher than 3D printed alumina at 75 °C, reducing the radar cross-section and maximum readout range of chipless wireless RFID tags integrating several of these resonators. These results demonstrate that, while HR-Si performance is higher for the usual temperatures achieved in an indoor localization scenario, 3D printed alumina is more suitable if a temperature-stable response is needed or if the tags need to operate at high temperatures, such as in case of fire.

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377 Exploring neutrophil nuclear dynamics and neutrophil extracellular traps using expansion microscopy

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Journal of Investigative Dermatology 2022年第12期142卷 S245-S245页

作者： J. Holsapple L. Schnitzler L. Rusch T.H. Baldeweg E. Neubert S. Kruss L. Erpenbeck Dermatology Universitätsklinikum Münster Münster Germany Ruhr-Universität Bochum Bochum Germany University Medical Center Göttingen Göttingen Germany Fraunhofer Institute for Microelectronic Circuits and Systems Duisburg Germany

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Nahinfrarot Fluoreszenz-Lebensdauer Mikroskopie von Biomolekülen mit Kohlenstoffnanoröhren**

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Angewandte Chemie 2023年第24期135卷

作者： Dr. Linda Sistemich Phillip Galonska Jan Stegemann Julia Ackermann Prof. Dr. Sebastian Kruss Physical Chemistry II Ruhr-University Bochum Universitätsstr. 150 44801 Bochum Deutschland Biomedical Nanosensors Fraunhofer Institute for Microelectronic Circuits and Systems Finkenstr. 61 47057 Duisburg Deutschland Elektrische Bauelemente und Schaltungen Universität Duisburg-Essen Bismarkstraße 81 47057 Duisburg Deutschland

Einwandige Kohlenstoffnanoröhren ( single-walled carbon nanotubes , SWCNTs) sind vielseitig einsetzbare Bausteine für Biosensoren, die im nahen Infrarot (NIR) fluoreszieren. Ihre Oberfläche kann chemisch so modifiziert werden, dass sie auf Analyten mit einer Veränderung ihrer Fluoreszenz reagieren. Intensitätsbasierte Signale werden jedoch leicht durch äußere Faktoren wie Bewegungen der Probe beeinflusst. Hier zeigen wir Fluoreszenz-Lebensdauer Mikroskopie ( fluorescence lifetime imaging microscopy , FLIM) von SWCNT-basierten Sensoren im NIR. Dafür wurde ein konfokales Laser-Scanning-Mikroskop (CLSM) für NIR-Signale (>800 nm) angepasst und zeitkorrelierte Einzelphotonenzählung von (GT) 10 -DNA-funktionalisierten SWCNTs verwendet. (GT) 10 -SWCNTs fungieren als Sensoren für den wichtigen Neurotransmitter Dopamin. Ihre Fluoreszenzlebensdauer (>900 nm) fällt biexponentiell ab, wobei die längere Lebensdauerkomponente (370 ps) mit steigender Dopaminkonzentration um bis zu 25 % ansteigt. Mit diesen Sensoren können Zellen beschichtet werden, um extrazelluläres Dopamin in 3D mittels FLIM zu messen. Wir demonstrieren damit das Potenzial der Fluoreszenzlebensdauer als Messgröße für SWCNT-basierte NIR-Sensoren.

关键词： Dopamin Einzelwandige Kohlenstoffnanoröhren (SWCNTs) FLIM Fluoreszenzlebensdauer Nanosensoren

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Titelbild: Nahinfrarot Fluoreszenz-Lebensdauer Mikroskopie von Biomolekülen mit Kohlenstoffnanoröhren (Angew. Chem. 24/2023)

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Angewandte Chemie 2023年第24期135卷

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Novel Distance Measurement Method Using Inband-RFID-Technology

Novel Distance Measurement Method Using Inband-RFID-Technolo...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Philip Schmidt Peter Kuhn Thorben Grenter Anton Grabmaier Fraunhofer Institute for Microelectronic Circuits and Systems (IMS) Duisburg Germany University of Duisburg-Essen Duisburg Germany

ISBN: (数字)9781728134031

ISBN: (纸本)9781728134048

For many RFID applications it is desirable to get more information about an item than the unique ID, e.g. the position of a unique item often is of great interest. In this paper we present first simulation results of a novel method for measuring the distance between a reader and commercial off-the-shelf tags. This implies that the communication between a reader and a tag or a bulk of tags is not influenced or interrupted by this novel distance measuring method. It is expected to achieve a distance measuring accuracy of about 1% referred to the maximum communication distance between a reader and a tag. Additionally to the state-of-the-art RFID communication principle, which uses a well-known amplitude modulated (amplitude modulated due to the data transmission from reader to tag) RFID carrier, this novel measuring method uses an overlaid phase modulation. For the measuring principle to work it is important that the wavelength corresponding to the data rate of the phase modulation is not higher than twice the distance between reader and tag. If this condition is truly fulfilled, the phase information of the phase modulated signal will be clearly corresponding to the distance between reader and tag. The reader transmits the phase information to the tag which is returned to the reader due to the backscatter modulation. In a coherent reader structure the phase difference between the transmitted and received baseband signal can be used to calculate the distance from reader to tag. This distance calculation could be realized by correlation. Therefore the cross-correlated of the transmitted and received phase information can be subtracted from the auto correlation of the transmitted phase information. In case of this the distance can be calculated.

关键词： Correlation Delays Crosstalk Distance measurement Phase modulation Springs Radiofrequency identification

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Miniaturized Multi Sensor Implant for Monitoring of Hemodynamic Parameters*

Miniaturized Multi Sensor Implant for Monitoring of Hemodyna...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Ö. Dogan N. Schierbaum J. Weidenmüller M. Baum T. Schröder D. Wünsch M. Görtz K. Seidl Fraunhofer Institute for Microelectronic Circuits and Systems IMS Duisburg Germany Fraunhofer Institute for Electronic Nano Systems ENAS Chemnitz Germany Department of Electronic Components and Circuits University of Duisburg-Essen Duisburg Germany

t a novel miniaturized multi sensor implant for monitoring hemodynamic parameters in cardiovascular regions. Pressure measurements are performed with a highly accurate capacitive pressure sensor. An additional acceleration and temperature sensor allows compensating the impact of patient's inclination and temperature variations on the pressure measurement, respectively. A multi-functional transponder application-specific integrated circuit (ASIC) manages sensor signal processing, storage of ID, sensor calibration data, telemetric energy, and data transmission with an extracorporeal reading unit. Each component of the implant is assembled on a low temperature co-fired ceramics (LTCC) circuit board with an integrated antenna coil enabling an inductive near-field coupling at a frequency of 13.56 MHz. For a streamlined shape and reduction of thrombogenicity, the implant is encapsulated by biocompatible polymers.

关键词： Implants Temperature sensors Temperature measurement Calibration Pressure measurement Plastics Acceleration

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Analysis and simulation of super-hydrophobic layers for microfluidic applications 7

Analysis and simulation of super-hydrophobic layers for micr...

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7th GMM-Workshops on Micro-Nano-Integration

作者： Türk, Semih Jupe, Andreas Viga, Reinhard Vogt, Holger University of Duisburg-Essen Duisburg Germany Fraunhofer Institute for Microelectronic Circuits and Systems Duisburg Germany

ISBN: (纸本)9783800747894

In this work, super-hydrophobic coatings are investigated for drop transport with electrowetting-on-dielectric (EWOD). At first, the basics of EWOD are shown. Then the impact of decreasing the thickness of the dielectric layer and using super-hydrophobic coatings on the actuation voltage Vmin for drop transport is presented. In the last part, simulation results made with COMSOL Multiphysics™ are shown and the results are discussed. © VDE VERLAG GMBH · Berlin · Offenbach

关键词： Drops

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Biosensing with Fluorescent Carbon Nanotubes

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Angewandte Chemie 2022年第18期134卷

作者： Julia Ackermann Justus T. Metternich Dr. Svenja Herbertz Prof. Dr. Sebastian Kruss Biomedical Nanosensors Fraunhofer Institute for Microelectronic Circuits and Systems Finkenstrasse 61 47057 Duisburg Germany Department EBS University Duisburg-Essen Bismarckstrasse 81 47057 Duisburg Germany Physical Chemistry Ruhr-University Bochum Universitätsstrasse 150 44801 Bochum Germany

Biosensors are powerful tools for modern basic research and biomedical diagnostics. Their development requires substantial input from the chemical sciences. Sensors or probes with an optical readout, such as fluorescence, offer rapid, minimally invasive sensing of analytes with high spatial and temporal resolution. The near-infrared (NIR) region is beneficial because of the reduced background and scattering of biological samples (tissue transparency window) in this range. In this context, single-walled carbon nanotubes (SWCNTs) have emerged as versatile NIR fluorescent building blocks for biosensors. Here, we provide an overview of advances in SWCNT-based NIR fluorescent molecular sensors. We focus on chemical design strategies for diverse analytes and summarize insights into the photophysics and molecular recognition. Furthermore, different application areas are discussed—from chemical imaging of cellular systems and diagnostics to in vivo applications and perspectives for the future.

关键词： biosensors carbon nanotubes imaging molecular recognition near-infrared fluorescence

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Thin film ALD materials as functional layer for 3D-integrated metal oxide gas-sensors 7

Thin film ALD materials as functional layer for 3D-integrate...

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7th GMM-Workshops on Micro-Nano-Integration

作者： Knauß, A.M. Münchenberger, F.M. Dietz, D. Jupe, A. Kappert, H. Vogt, H. Fraunhofer Institute for Microelectronic Circuits and Systems IMS Duisburg Germany University of Duisburg-Essen Duisburg Germany

ISBN: (纸本)9783800747894

We developed the design of an innovative free-floating metal oxide nanowire based gas sensor. The atomic layer deposition (ALD) method is employed for the creation of the gas sensitive wire as well as the free-floating heater structure. For their sacrificial layer based fabrication we propose a simultaneous release. The dependency of the temperature within the nanowire, consisting of zinc oxide (ZnO), with regard to the voltage applied at the heater, made of ruthenium (Ru) or titanium nitride (TiN), and further the gap distance between both free-floating structures were simulated with COMSOL Multiphysics®. The simulations indicated that TiN exhibits both a more homogeneous temperature distribution within the heater along with lower power consumption necessary for achieving the sensitive temperature range of 220 °C to 350 °C within the ZnO nanowire. Moreover, the technical feasibility of the advanced sacrificial layer process was investigated in the microsystem laboratory successfully demonstrating the practicability of implementation. © VDE VERLAG GMBH · Berlin · Offenbach

关键词： Atomic layer deposition

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Photonic Crystal THz High-Q Resonator for Chipless Wireless Identification 1

Photonic Crystal THz High-Q Resonator for Chipless Wireless ...

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1st International Workshop on Mobile Terahertz systems, IWMTS 2018

作者： Jiménez-Sáez, Alejandro Schüßler, Martin Krause, Christopher Meyer, Frederic Bögel, Gerd Vom Jakoby, Rolf Technische Universität Darmstadt Institute of Microwave Engineering and Photonics Darmstadt Germany Fraunhofer Institute for Microelectronic Circuits and Systems Duisburg Germany

ISBN: (纸本)9781538612217

In this paper, the considerations and simulations made for the design and characterization of a high-Q resonator for wireless identification at 90 GHz are presented with the perspective to extend them to the low THz range. The designed resonator in high-resistive silicon has a quality factor of 700 and different simulation methods close to real measurement scenarios are shown to demonstrate the potential of the presented topology for the generation of identifications that can be wirelessly read in the low THz frequency range. © 2018 IEEE.

关键词： Resonators

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