Article
Acoustics
Yang Liu, Tommaso Seresini, Jun-Yan Liu, Liwang Liu, Fei Wang, Yang Wang, Christ Glorieux
Summary: Light absorption induced thermoelastic and photoacoustic excitation, combined with laser Doppler vibrometry, were used to analyze the dynamic mechanical behavior of a microcantilever. Three opto-mechanical generation mechanisms were identified, each initiated by modulated optical absorption and heating.
Article
Optics
Jingkun Guo, Simon Groblacher
Summary: The rapid development of high-Q(M) macroscopic mechanical resonators has enabled great advances in optomechanics. The study presents a versatile fabrication method for fully integrated optomechanical structures. By placing a photonic crystal cavity directly above a mechanical resonator, strong optomechanical interaction strengths are achieved.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Physics, Applied
Domna G. Kotsifaki, Viet Giang Truong, Sile Nic Chormaic
Summary: This work demonstrates the sequential trapping of 20nm particles using metamaterial plasmonic optical tweezers, with the investigation of multiple trapping via trap stiffness measurements for various trapping configurations. The plasmonic configuration could be utilized as a light-driven nanoscale sorting device, offering an alternative method to trap multiple nanoparticles at distinct hotspots and control mass transport on the nanoscale.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Yixuan Xu, Junxiao Wu, Pengfei Zhang, Yingjuan Yan, Yingdan Song, Alexey Nikolaevich Yakovlev, Tingting Hu, Tatiana Grigorievna Cherkasova, Xuhui Xu, Haijie Guo, Lei Zhao
Summary: This study successfully developed a multi-mode dynamic luminescent material LiGaO2, and different luminescence properties were obtained by adjusting the synthetic atmospheres. The dynamic optical information readout based on intensity-color-wavelength multiplexing in undoped single ODS materials is realized through the synergistic effect of trap centers and luminescence centers.
CERAMICS INTERNATIONAL
(2023)
Article
Computer Science, Interdisciplinary Applications
K. R. Maryada, S. E. Norris
Summary: The parallel algorithm proposed in this study reduces communication costs for deterministic dynamic mode decomposition of large datasets, achieving notable savings in computational costs as well. By compressing high-dimensional snapshot data using horizontal-slicing and parallel Tall and Skinny QR factorisation, the algorithm constructs the Koopman operator with only one communication step. Additionally, avoiding the computation of the orthonormal matrix during the parallel QR factorisation results in significant computational savings, making the current algorithm up to 2.5 times faster than existing parallel approaches without sacrificing accuracy.
JOURNAL OF COMPUTATIONAL SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Karol Krzempek, Piotr Jaworski, Piotr Bojes, Pawel Koziol
Summary: A novel photothermal gas sensor configuration is demonstrated in this work. By analyzing the phase shift of the self-heterodyne beatnote signal of a mode-locked laser, the gas refractive index modulation caused by an auxiliary laser excitation is efficiently detected. IQ demodulation combined with Wavelength Modulation Spectroscopy-based signal analysis is used to optimize and simplify spectroscopic data acquisition and analysis. A proof-of-concept experiment for carbon dioxide detection at 2 µm wavelength shows a noise equivalent absorption of 2.25×10^(-7) for 1000 s integration time. The proposed sensor configuration is versatile and can be used to probe any gas molecule with the appropriate excitation source to induce the photothermal effect.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
H. Baba, T. Ichihara, T. Isobe, T. Ohnishi, K. Yoshida, Y. Watanabe, S. Ota, H. Shimizu, S. Shimoura, S. Takeuchi, D. Nishimura, J. Zenihiro, A. O. Tokiyasu, R. Yokoyama
Summary: The MPV system utilizes a parallel readout architecture with a maximum data throughput of 400 Mbps, which can significantly enhance the performance of VME data acquisition systems.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2021)
Article
Optics
Zhiyu Yan, Jun Zou
Summary: This Letter demonstrates the integration of microlenses (MLs) on a surface-micromachined optical ultrasound transducer (SMOUT) array for parallel ultrasound data readout. The MLs are fabricated through photoresist patterning and reflow, with optimized focal lengths. The experimental results show that the ML-integrated SMOUT array achieves high acoustic sensitivity and excellent long-term stability, providing a promising approach for parallel ultrasound data acquisition and improving the imaging speed of 3D acoustic tomography.
Article
Computer Science, Artificial Intelligence
Pengcheng Li, Tingting Shu, Wen-Fang Xie, Wei Tian
Summary: This paper proposes a dynamic sliding mode control scheme combined with visual servoing method to improve the tracking performance of a 6-RSS parallel robot, achieving complex 6-dimensional trajectory tracking with high accuracy in real-time experiments. The proposed DSMC exhibits superiority in terms of tracking performance and robustness compared to classical kinematic level controllers.
JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS
(2021)
Article
Multidisciplinary Sciences
Fangzhou Xia, Kamal Youcef-Toumi, Thomas Sattel, Eberhard Manske, Ivo W. Rangelow
Summary: An Atomic Force Microscope (AFM) is a powerful tool for nanoscale surface studies, but it has limited imaging throughput for large-scale inspection purposes. Researchers have developed high-speed AFM systems to record dynamic process videos, sacrificing imaging area. Inspecting large-scale nanofabricated structures requires nanoscale spatial resolution imaging of a static sample over a large area, which conventional AFMs cannot provide. This paper introduces a custom AFM using an array of active cantilevers, allowing for parallel operation and increased imaging throughput.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Anatomy & Morphology
Amir F. Payam, Nguyen Duy Vy
Summary: This paper investigates the dynamic behavior and resonance frequencies of an atomic force microscope cantilever with sidewall probe immersed in liquid. A closed-form expression is derived and numerical analysis is used to calculate the flexural resonance frequencies. The effects of sidewall length and normal stiffness on the frequency are studied, as well as the surface-coupled effect between the cantilever and simple surface.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Chemistry, Multidisciplinary
Jinbo Zhu, Jinglin Kong, Ulrich F. Keyser, Erkang Wang
Summary: DNA nanotechnology provides a unique opportunity for molecular computation, with the ACSD circuit utilizing DNA breathing and catalytic reactions to achieve controllable reorganization, suitable for biosensing applications.
Article
Chemistry, Multidisciplinary
Sulaiman Z. Almutairi
Summary: This study examines the potential instability issues caused by the dynamic interactions between parallel grid-forming inverters using s-domain admittance-based eigenvalue and mode shape analysis. The results show that unstable resonance modes may exist due to the interactions of two parallel inverters. The impacts of transmission line length, the converter control's virtual impedance unit, and the voltage feed-forward unit are also analyzed, and it is found that the virtual impedance control has a negligible influence on the resonance while the voltage feed-forward unit stabilizes the resonance. Finally, the stability analysis is validated using electromagnetic transient (EMT) simulations.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Liling Lu, Ruijin Zeng, Qianyun Lin, Xue Huang, Dianping Tang
Summary: In this study, the transformation of ZnIn2S4 after CE reaction with Cu2+ ions was explored, and a dual-readout detection system was designed for reliable detection of CEA. Based on the polarity-switchable PEC strategy, CEA could be accurately detected using both photothermal and photoelectrochemical signals.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Aerospace
Tianyu Chen, Bo Yuan, Christopher M. Harvey, Kun Zhang, Simon Wang, Vadim V. Silberschmidt, Bingchen Wei
Summary: This paper analytically derives the dynamic mode-I energy release rate of cracks propagating along elastic interfaces in double cantilever beams under high loading rates for the first time. The developed theory is verified against finite-element-method simulations and demonstrates excellent ability in capturing crack propagation behavior and assessing energy release rate.
JOURNAL OF AEROSPACE ENGINEERING
(2022)
Review
Biotechnology & Applied Microbiology
Baeckkyoung Sung, Min-Ho Kim, Leon Abelmann
Summary: Soft micro- and nanostructures, particularly magnetic microgels and nanogels, have been extensively developed for biomedical applications. These materials combine the advantages of hydrogels and colloidal particles, and offer a wide range of potential applications in biomedicine.
BIOENGINEERING & TRANSLATIONAL MEDICINE
(2021)
Article
Engineering, Electrical & Electronic
Y. P. Klein, L. Abelmann, J. G. E. Gardeniers
Summary: This study optimized two canonical designs for mobile microfluidic nuclear magnetic resonance (NMR) applications and presented general design guidelines. The simple parallel cuboid configuration achieved the best homogeneity without active shimming, while the pseudo-Halbach configuration had the highest field strength.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Medicine, General & Internal
Michiel Stevens, Peng Liu, Tom Niessink, Anouk Mentink, Leon Abelmann, Leon Terstappen
Summary: This study optimized the immunomagnetic enrichment process using a flow-through magnetophoretic system to increase sample size for more accurate treatment effects measurement and personalized therapy guidance. Experimental data confirmed the effectiveness of optimizing magnetophoretic separation methods in combination with cell lines of varying EpCAM antigen expression.
Article
Materials Science, Multidisciplinary
Suk-Heung Song, Jinsik Yoon, Yongkyo Jeong, Yong-Gyun Jung, Leon Abelmann, Wook Park
Summary: A low-cost, mass-production process was developed to create rod-shaped glass-coated magnetic particles with magnetic metal core and glass shell structure. The magnetic properties of these particles were investigated by analyzing their optical absorbance in suspension. An automated system was demonstrated to quantify and dispense a large amount of these particles, reducing time and effort required for the assembly and packaging process.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Robotics
Vincent Groenhuis, Gijs Rolff, Koen Bosman, Leon Abelmann, Stefano Stramigioli
Summary: The research introduces an electric steppermotor with three coaxial shafts, a maximum torque of 0.10 N m, and a maximum no-load speed of 4000 revolutions per minute. By redesigning the mechanical design, effective use of the multi-motor design can be achieved.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Roger Sachan, Patrik Schuerch, Paolo Testa, Edgar Hepp, Wabe W. Koelmans, Roger J. Narayan
Summary: This paper demonstrates the successful fabrication of a hollow microneedle out of copper using local electrodeposition-based additive manufacturing. The microneedle was found to have a sharp tip and hollow bore, making it suitable for producing various microscale medical devices. The absence of toxic impurities in the solid microneedle suggests that this approach may be appropriate for manufacturing a range of microscale medical devices.
Article
Materials Science, Multidisciplinary
Rajaprakash Ramachandramoorthy, Szilvia Kalacska, Gabriel Poras, Jakob Schwiedrzik, Thomas E. J. Edwards, Xavier Maeder, Thibaut Merle, Giorgio Ercolano, Wabe W. Koelmans, Johann Michler
Summary: Microscale dynamic testing is crucial for understanding material behavior at different strain rates. In this study, the compression testing of 3D printed copper micropillars revealed weak rate dependence for microcrystalline copper and strong rate dependence for ultrafine grained copper at lower strain rates.
APPLIED MATERIALS TODAY
(2022)
Article
Materials Science, Multidisciplinary
Yannick P. Klein, Leon Abelmann, Han Gardeniers
Summary: A novel principle of passive magnetic field shimming using ferrofluids is introduced, which compensates for magnetic field inhomogeneities. The concept was demonstrated on a permanent magnet assembly and showed improved field homogeneity. This concept is particularly attractive for mobile magnetic resonance systems as it does not require electrical power during operation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Biomedical
Kaz I. N. A. Middelhoek, Veronika Magdanz, Leon Abelmann, Islam S. M. Khalil
Summary: This work demonstrates the formation and essential functionalities of biohybrid sperm-templated clusters for wireless actuation and drug delivery. The clusters, assembled with ferromagnetic nanoparticles around dead sperm cells, can roll on solid surfaces under the influence of an external magnetic field and be localized using ultrasound imaging. The estimated drug load scales with the number of cells in the cluster, making these biohybrid clusters promising for targeted therapy.
BIOMEDICAL MATERIALS
(2022)
Article
Instruments & Instrumentation
Marcel K. Welleweerd, Tijmen Hageman, Marc Pichel, Dave van As, Hans Keizer, Jordi Hendrix, Mina M. Micheal, Islam S. M. Khalil, Alveena Mir, Nuriye Korkmaz, Robbert Krawinkel, Daniel M. Chevrier, Damien Faivre, Alfred Fernandez-Castane, Daniel Pfeiffer, Leon Abelmann
Summary: This article presents a spectrophotometer combined with electromagnets for analyzing suspensions of magnetotactic bacteria, as well as other magnetic cells and particles. The system, named MagOD, can be easily replicated, and its performance is compared to existing commercial spectrophotometers. The authors demonstrate the use of MagOD by analyzing the absorbance of magnetotactic bacteria based on their orientation and reorientation speed. The instrument allows researchers to extract various magnetic field-dependent parameters from the suspensions, aiding in the understanding and application of these intriguing microorganisms.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Proceedings Paper
Automation & Control Systems
Vincent Groenhuis, Gijs Rolff, Koen Bosman, Leon Abelmann, Stefano Stramigioli
Summary: Absolute position detection in sensorless electric stepper motors offers advantages such as higher space efficiency, improved shock resistance, simplified installation, reduced cost, etc. The technology enables dynamic position sensing and correction, but it is not applicable at standstill. Calibration and smoothing techniques are used to minimize measurement errors.
2022 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS (IROS)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
G. Ulisse, P. Schuerch, W. W. Koelmans, V Krozer
Summary: This paper presents the fabrication of a metallic helix using a 3D additive micromanufacturing technique (mu AM), which can be utilized as a slow-wave structure (SWS) in a TWT amplifier. Simulations demonstrate that the TWT can achieve a gain higher than 30 dB at 77GHz with a 3 dB bandwidth of about 2 GHz.
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Jonathan S. O'Connor, Heesoo Kim, Eunheui Gwag, Leon Abelmann, Baeckkyoung Sung, Andreas Manz
Summary: This study describes the rapid prototyping of a microfluidic device for surfactant-free encapsulation of liver cells in gelatin microgels, enabling high-throughput cytotoxicity screening. Chips with rectangular channels effectively produced droplets without surfactants, with HepG2 cell viability reaching 96.5% two hours post-generation.
2021 34TH IEEE INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS (MEMS 2021)
(2021)
Article
Multidisciplinary Sciences
Baeckkyoung Sung, Leon Abelmann
Summary: This dataset demonstrates the agglomerate dimension and structure of oleic acid-coated superparamagnetic nanoparticles in a thermotropic liquid crystal, as well as the statistical information on the sizes and inter-particle spacing of the agglomerated nanoparticles. It supports the fundamental understanding of how colloidal nanospheres behave in an anisotropic fluid.
Article
Radiology, Nuclear Medicine & Medical Imaging
M. M. van de Loosdrecht, L. Abelmann, B. ten Haken
Summary: Superparamagnetic iron oxide nanoparticles (SPIONs) exhibit a nonlinear magnetic response in clinical applications, making them less sensitive to the human body and surgical steel instruments. Among the four nonlinear magnetic detection methods compared, second harmonic detection shows the best SNR and potential for improvement.
BIOMEDICAL PHYSICS & ENGINEERING EXPRESS
(2021)
