Article
Nanoscience & Nanotechnology
Benjamin Spetzler, Jingxiang Su, Ron-Marco Friedrich, Florian Niekiel, Simon Fichtner, Fabian Lofink, Franz Faupel
Summary: This study investigates the use of AlScN in delta-E effect sensors and finds that AlScN exhibits better sensitivity and limit of detection at low excitation amplitudes. When thermal-mechanical noise dominates, AlScN shows significant improvements in sensitivity and limit of detection.
Article
Chemistry, Analytical
Jiangle Yi, Dong Tian, Changli Zhou, Fangquan Xia, Chuannan Luo
Summary: In this study, tetrahedral DNA nanostructures (TDN) with different sizes were successfully designed and synthesized for the fabrication of an electrochemiluminescence (ECL) aptasensor to detect acetamiprid residues. The results showed that TDN can effectively amplify the sensor's signal, and the size of TDN is negatively correlated with the amplification coefficient and hybridization time.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Environmental Sciences
Michael Gorbunov, Vladimir Irisov, Christian Rocken
Summary: This study investigates the relationship between radio occultation inversion statistics and signal-to-noise ratio (SNR) by comparing data from different missions. The results show that the dependence of inversion statistics on SNR is not strong and is mainly determined by the variations in latitudinal distributions for different SNRs. Among the missions studied, Spire exhibits the smallest variations, with bias and standard deviation reaching saturated values at relatively low SNRs.
Article
Engineering, Electrical & Electronic
Wonjun Shin, Seongbin Hong, Yujeong Jeong, Gyuweon Jung, Jinwoo Park, Donghee Kim, Byung-Gook Park, Jong-Ho Lee
Summary: This study investigates the effects of channel length (L) scaling on the signal-to-noise ratio (SNR) of FET-type gas sensors with a horizontal floating-gate. It is found that SNR is proportional to the square root of the channel length (L) of the FET transducer. The low-frequency noise characteristics of the FET-type gas sensor can be explained by the carrier number fluctuation model with correlated mobility fluctuation, providing important guidelines for designing sensor platforms in FET-type gas sensors.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Acoustics
Chan -Jae Park, Seung-Min Lee, A-Hyeon Jo, Chan-Hoon Haan
Summary: This study aims to establish learning background noise criteria for people with incomplete hearing. The study found that the group with incomplete hearing performed worse in speech intelligibility tests compared to the normal hearing adult group. Based on the experimental results, the appropriate signal to noise ratio (SNR) for educational spaces for people with incomplete hearing was determined to be 20 dB for the Elderly group and 15 dB for the children group.
Article
Chemistry, Multidisciplinary
Renhou Han, Yue Liu, Yepei Mo, Huichen Xu, Zhengwen Yang, Rongrong Bao, Caofeng Pan
Summary: This study proposes a high anti-jamming capacitive flexible pressure sensor with a PVDF@AgNWs@TiO2 film as the dielectric layer. The sensor demonstrates high sensitivity and convenient preparation. The introduction of a core-shell structure in the PVDF film enhances the initial capacitance and balances the dielectric properties of the sensor.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Seung Kwan Kim, Sun Do Lim, Dong-Joon Lee, In-June Hwang, Young-Pyo Hong
Summary: An approach to improve the signal-to-noise ratio (SNR) in a microwave electric field sensor system using a polarization maintaining fiber (PMF) probe with an electro-optic (EO) crystal is proposed and experimentally validated. By using a newly fabricated PMF probe with parameters close to the optimal design, an SNR improvement of 2.5 dB compared to the previous probe was successfully demonstrated in microwave electric field measurements.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Xiaojing Shi, Wei Lu, Jianfeng Sun, Weijie Ge, Hailong Zhang, Sining Li
Summary: A GM-APD coherent lidar system based on signal modulation is proposed to improve the system's signal-to-noise ratio. Simulation and experiments show that signal modulation can increase the system's SNR by more than two times, enhancing the detection ability of the system.
Review
Chemistry, Physical
Anuj Kumar, Davinder Kaur
Summary: Magnetoelectric heterostructures have attracted attention in the material science field due to their magneto-electric coupling. Recent research has focused on improving the sensing performance of magnetoelectric-based magnetic sensors and exploring new sensing mechanisms such as signal modulation and increment E-based sensors. These sensors show potential for future applications in biomedical, geomagnetic, and magnetic anomaly detections.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Zhijuan Li, Yanbin Wang, Jing Zhao
Summary: This study proposes a SINR-related effective distance constrained model based on the maximum interference range for evaluating the performance of IEEE 802.11p VANET. It also analyzes the effect of vehicle speed on VANET performance through experiments.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Lei Kong, Ke Cui, Jiabin Shi, Ming Zhu, Simeng Li
Summary: A two-step one-dimensional phase unwrapping algorithm is proposed using encoding and deep convolutional neural network (DCNN) for phase unwrapping. Simulation and experimental results demonstrate that the method performs well in low signal-to-noise ratio (SNR) and remains stable even for negative SNR.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Mouad Addad, Ali Djebbari
Summary: This paper focuses on evaluating the noise robustness and the effect of branched wire networks on the performance of both STDR and SSTDR methods based on ZCZ sequences.
IEEE SENSORS JOURNAL
(2021)
Article
Automation & Control Systems
Shiwei Liu, Yanhua Sun, Yihua Kang
Summary: In this article, a novel E-exponential SR model and weak signal detection method are proposed for the detection of weak defect signals in steel wire rope. The model is introduced from the perspective of Taylor expansion and nonlinear system analysis, and its performance is evaluated through simulation and analysis. Experimental comparisons and case studies are conducted to demonstrate the validity of the proposed method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Lei Wu, Guofeng Zhao, Zhihua Feng
Summary: The article introduces a synchronous demodulation method based on gated integrator for precision sensors, which demonstrates superior signal-to-noise ratio and resolution compared to traditional lock-in amplifiers. Through practical testing, it is proven that the proposed method significantly improves the resolution of sensors and has the potential to be applied to various precision sensors requiring synchronous demodulation.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Wei Hong, Menghao Zhao, Bingxue Chen, Tongyang Li, Zhonghai Ma, Yang Miao
Summary: This study proposes a method using common-mode rejection to eliminate interferences for inductive debris detections. Experimental results show that the sensor effectively eliminates multiple interferences and improves the SNR by about 7.5 times in actual debris detection.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Eric Elzenheimer, Christin Bald, Erik Engelhardt, Johannes Hoffmann, Patrick Hayes, Johan Arbustini, Andreas Bahr, Eckhard Quandt, Michael Hoeft, Gerhard Schmidt
Summary: Dedicated research is being conducted on novel thin film magnetoelectric (ME) sensor concepts for medical applications. A quantitative evaluation of the sensor system and its output signals is necessary, along with a system consideration. The evaluation should be performed in reproducible measurement conditions, and an application-specific capacity (ASC) can be used as a figure of merit for a quantitative signal assessment. The approach can be applied to other magnetic sensors and applications.
Article
Chemistry, Multidisciplinary
Josiah Shondo, Salih Veziroglu, Tim Tjardts, Jacek Fiutowski, Stefan Schroeder, Yogendra Kumar Mishra, Thomas Strunskus, Horst-Guenther Rubahn, Franz Faupel, Oral Cenk Aktas
Summary: A multifunctional surface that provides highly selective oil sorption and clean-up capability via photocatalytic decomposition is proposed. This surface shows high removal efficiency and low cost, making it suitable for applications in water treatment and self-cleaning.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Cai Mueller, Phillip Durdaut, Rasmus B. Hollaender, Anne Kittmann, Viktor Schell, Dirk Meyners, Michael Hoeft, Eckhard Quandt, Jeffrey McCord
Summary: This study revealed the complex behavior of horizontally polarized surface shear waves in magnetoelectric surface acoustic wave based magnetic field sensor devices using time-resolved magnetooptical microscopy, uncovering partial surface wave reflections, wave front dephasing, and secondary wave generation originating from structures and magnetic domain walls.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Matthias Schwartzkopf, Andre Rothkirch, Niko Carstens, Qing Chen, Thomas Strunskus, Franziska C. Loehrer, Senlin Xia, Christoph Rosemann, Lorenz Biessmann, Volker Koerstgens, Shiwani Ahuja, Pallavi Pandit, Jan Rubeck, Susann Frenzke, Alexander Hinz, Oleksandr Polonskyi, Peter Mueller-Buschbaum, Franz Faupel, Stephan Roth
Summary: In this study, we investigate in real time the formation of polymer-supported silver, copper, and silver-copper-alloy nanoclusters using in situ surface-sensitive X-ray scattering and optical spectroscopy. By tracking the growth morphology, surface plasmon resonance shifts, and growth kinetics, we are able to extract the influence of scaling effects on nucleation and phase selection. Our findings provide a crucial route to accurately tailor the plasmon resonances of nanosized clusters, which is essential for anti-counterfeiting applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Polymer Science
Stefan Schroeder, Nicolai Ababii, Mihai Brinza, Nicolae Magariu, Lukas Zimoch, Mani Teja Bodduluri, Thomas Strunskus, Rainer Adelung, Franz Faupel, Oleg Lupan
Summary: Metal oxide gas sensors have superior properties in terms of sensitivity, lifetime, cost and portability, making them highly valuable for various applications. However, their selectivity, gas response and energy consumption influenced by ambient gases still need improvement and are being extensively researched. This study presents a simple approach to enhance the selectivity of gas sensing structures using an ultrathin polymer thin film, resulting in improved selectivity to specific vapors of volatile organic compounds. This research demonstrates the possibilities of enhancing the properties of metal oxide gas sensors, which is crucial in fields such as medicine, security and food safety.
Article
Chemistry, Multidisciplinary
Oguz Han Asnaz, Jonas Drewes, Marie Elis, Thomas Strunskus, Franko Greiner, Oleksandr Polonskyi, Franz Faupel, Lorenz Kienle, Alexander Vahl, Jan Benedikt
Summary: A novel combined setup of a Haberland type gas aggregation source and a secondary radio frequency discharge is used to generate, confine, and coat nanoparticles over much longer time scales than traditional in-flight treatment. The process is precisely monitored using localized surface plasmon resonance and Fourier-transform infrared spectroscopy as in situ diagnostics. Surface coating is shown to occur in two phases: first, singular seeds appear on the particle surface which then grow to cover the entire particle surface over 3 to 5 minutes.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Igor Barg, Niklas Kohlmann, Florian Rasch, Thomas Strunskus, Rainer Adelung, Lorenz Kienle, Franz Faupel, Stefan Schroeder, Fabian Schuett
Summary: This work demonstrates a novel concept for the development of strain-invariant, highly elastic and highly water stable all-organic soft conductors, overcoming the limitations of previous strain-invariant soft conductors. The thin film structure has highly hydrophobic properties, resulting in stable electrical properties even when immersed in water for a month.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Analytical
Phillip Durdaut, Michael Hoeft
Summary: Piezoelectric layers coupled to micromechanical resonators are used as sensors for detecting various physical quantities. The performance of piezoelectric resonators in amplitude mode and phase mode is analyzed, considering sensitivities, noise behavior, and limits of detection. Frequency-dependent limits of detection are derived, and it is found that phase mode generally has better detection limits and wider bandwidth compared to amplitude mode.
Article
Chemistry, Analytical
Mihai Brinza, Stefan Schroeder, Nicolai Ababii, Monja Gronenberg, Thomas Strunskus, Thierry Pauporte, Rainer Adelung, Franz Faupel, Oleg Lupan
Summary: Certain molecules in exhaled breath or outgassing vapors can act as biomarkers for various diseases and food spoilage. The development of small and reliable devices with high sensitivity for detection of these molecules is in demand. Metal-oxide gas sensors present an ideal solution, offering a tradeoff between performance and cost compared to other methods. However, selective detection of low levels of ammonia and multiple gases with one sensor remains a challenge.
Article
Engineering, Mechanical
Gowtham Arivanandhan, Zixiong Li, Sabrina M. Curtis, Lisa Hanke, Eckhard Quandt, Manfred Kohl
Summary: We propose a novel design approach to optimize the power consumption of cantilever-based shape memory alloy (SMA)/Si bimorph microactuators. By utilizing finite element simulation, additional folded beams are designed in the perpendicular direction to homogenize the temperature distribution along the cantilevers. The temperature-homogenized SMA/Si microactuators exhibit a significant reduction in power consumption compared to the conventional double-beam cantilever design, up to 48%.
Article
Materials Science, Multidisciplinary
Sabrina M. Curtis, Jascha L. Gugat, Lars Bumke, Duygu Dengiz, Lena Seigner, Don Schmadel, Nathan S. Lazarus, Eckhard Quandt
Summary: This paper presents the first numerical and experimental studies of freestanding thin-film TiNiCuCo superelastic alloys for stretchable interconnects. The superelastic conductor with a serpentine geometry achieves significantly larger elastic elongations compared to copper. The superior mechanical advantages of TiNiCuCo combined with the high electronic conductivity of copper make it a promising material for improving conductors in stretchable and flexible electronics.
SHAPE MEMORY AND SUPERELASTICITY
(2023)
Article
Chemistry, Analytical
Mohammad Sadeghi, Mohammad M. Bazrafkan, Marcus Rutner, Franz Faupel
Summary: This study investigates the dynamic behavior of a magnetoelectric microresonator using a finite element method and machine learning algorithm. The linear and nonlinear behavior of the microactuator is evaluated, and differential equations are reconstructed using a data-driven system identification procedure and simulated annealing method. Sensitivity analysis is conducted to determine the optimal range and step size for input parameters. The study finds that prediction error increases as excitation levels increase.
Article
Nanoscience & Nanotechnology
Benjamin Spetzler, Dilara Abdel, Frank Schwierz, Martin Ziegler, Patricio Farrell
Summary: Two-dimensional layered transition metal dichalcogenides (TMDCs) have shown promise as memristive materials for neuromorphic computing systems. This study investigates the switching mechanisms of TMDCs and reveals the importance of defect dynamics, specifically the formation of local vacancy depletion zones. A dynamic charge transport model is introduced to explain device characteristics and validate the relevance of vacancy dynamics. The insights gained from this study can contribute to the improvement of TMDC memristive devices in future neuromorphic computing applications.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Elizaveta Spetzler, Benjamin Spetzler, Jeffrey McCord
Summary: Intrinsic magnetic noise affects the functionality of magnetic field sensors and related devices using magnetic films as sensing elements. This study reveals a novel source of magnetic noise caused by the magnetostriction of ferromagnetic materials. The introduced noise contribution is correlated with the nonlinearity of the magnetostrictive properties and significantly affects the sensor output.
ADVANCED FUNCTIONAL MATERIALS
(2023)
