Article
Engineering, Electrical & Electronic
Quanwei Zhang, Cun Li, Yulong Zhao, Zichao Zhang
Summary: The quartz resonant pressure sensor designed has high precision and stability, with high sensitivity and accuracy under ultra-high pressure, suitable for special fields such as deep-sea exploration.
IEEE SENSORS JOURNAL
(2021)
Article
Automation & Control Systems
Dengpeng Xing, Fangfang Liu, De Xu
Summary: This article investigates the simultaneous precision assembly of multiple objects, presenting strategies for alignment and insertion. Experimental results demonstrate the effectiveness of the proposed method.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2021)
Article
Engineering, Electrical & Electronic
Il Ryu Jang, Jeonhyeong Park, Chaehyun Ryu, Soon In Jung, Hyo Na Kim, Sang Bok Kim, Hoe Joon Kim
Summary: This paper presents the integration of Carbon Nanotubes (CNTs) on a Quartz Crystal Microbalance (QCM) for accurate sensing of the ion concentration in liquid. The CNT layer induces a controllable roughness on QCMs, improving particle adhesion for a stable QCM operation.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Christopher W. Mordue, Jonathan M. R. Weaver, Phillip S. Dobson
Summary: Atomic force microscopy (AFM) cantilevers, made from reflective coating and structural substrate layers, can experience thermally induced deflection due to temperature changes. The study explores the impact of this deflection on in- and out-of-contact scenarios, as well as the topographic artefacts it produces. Measurement of cantilever temperature and deflection using scanning thermal microscopy probes showed that AFM's feedback system cannot accurately account for thermal induced deflection, leading to significant topographic errors.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yonghui Zhou, Chin-Yin Chen, Licheng Zhang, Jiguang Cheng, Qiang Zhou, Min-Chiang Chao, Ying Wang
Summary: This article establishes and verifies the relationship between the stiffness of the encapsulation structure and the force-frequency coefficient of the piezoelectric crystal through finite element analysis and experiments. It is found that the encapsulation structural stiffness is equivalent to the force-frequency coefficient of the crystal, and the design results of the encapsulation structural stiffness can be used to express the force-frequency coefficient of the sensor. Furthermore, SEM analysis confirms that the encapsulation structure has better structural characteristics with thinner adhesive thickness.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yinan Wu, Zhi Fan, Yongchun Fang, Cunhuan Liu
Summary: An algorithm based on B-spline curve fitting is designed to compensate for hysteresis in AFM images, while a novel off-line drift correction algorithm based on cross diagonals' scanning is proposed for reconstructing high-quality AFM images.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Cell Biology
Eleni Priglinger, Juergen Strasser, Boris Buchroithner, Florian Weber, Susanne Wolbank, Daniela Auer, Eva Grasmann, Claudia Arzt, Dmitry Sivun, Johannes Grillari, Jaroslaw Jacak, Johannes Preiner, Mario Gimona
Summary: Interest in using mesenchymal stem cell derived extracellular vesicles (MSC-EVs) as therapeutic agents has grown in the past decade. This study established and verified quartz crystal microbalance (QCM) as a highly sensitive label-free immunosensing technique for characterizing clinically approved umbilical cord MSC-EVs. By using QCM along with common characterization methods, specific detection of EVs via EV and MSC markers was achieved, allowing for quantitative determination of the ratio of marker-specific EVs versus non-vesicular particles.
JOURNAL OF EXTRACELLULAR VESICLES
(2021)
Article
Chemistry, Physical
Bongsu Kim, Junghoon Jahng, Abid Sifat, Eun Seong Lee, Eric O. Potma
Summary: In illuminated tip-sample junctions, light absorption by the sample leads to local heating and thermal expansion of the material, affecting the measured photoinduced force in PiFM experiments. While thermal contributions have been demonstrated in the mid-infrared range, evidence for such thermal effects in the vis/NIR range of PiFM remains elusive. Development of a frequency domain PiFM allows for direct registration of the thermal relaxation dynamics after photoexcitation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Optics
Mingtao Shang, Zhen-Li Huang, Yujie Wang
Summary: This paper investigates the relationship among drift correction precision, localization precision, and position estimation precision through theoretical analysis and simulation. It proposes the concept of relative localization precision to evaluate the impact of drift correction on imaging resolution. This is of great significance for selecting the appropriate drift correction method.
Article
Engineering, Electrical & Electronic
Liang Du, Peiling Cui, Xinxiu Zhou, Jinlei Li, Yanbin Li, Yang Wu
Summary: This paper introduces a method for suppressing unbalance vibration in the active magnetic bearing rotor of a magnetically suspended control moment gyro, using principles of the active magnetic bearing, unbalance vibration model, and synchronous signal detection. Experimental results confirm the effectiveness of this method in reducing synchronous current.
IEEE SENSORS JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
M. Labardi, S. Capaccioli
Summary: Surface displacements of picometers in piezoelectric materials after applying an electric potential can be detected and mapped with nanometer-scale lateral resolution using scanning probe methods, mainly piezoresponse force microscopy (PFM). However, absolute determination of these displacements is hindered by mechanical and electrostatic side-effects, requiring complex experimental or post-processing procedures for reliable results. Using quartz tuning-fork force sensors in intermittent contact mode PFM can provide measurements of electrically-induced surface displacements unaffected by electrostatic side-effects typical in conventional cantilever-based PFM.
Article
Optics
Kaiyuan Li, Jielei Ni, Xiao Tan, Qianwen Zhou, Danni Chen, Bo Cao, Jiafan Lin, Ting Lin, Pengxiang Zhao, Xiaocong Yuan, Yanxiang Ni
Summary: Single-molecule localization microscopy (SMLM) requires accurate drift correction for high-resolution imaging. We developed a new approach using mean squared displacement (MSD) analysis to evaluate the motions of fiducial markers. Our study showed that excluding high-MSD markers improved drift correction and image quality in SMLM imaging, leading to enhanced resolution. This research emphasizes the importance of pre-screening fiducial markers for improved image quality and resolution in SMLM imaging.
Article
Chemistry, Analytical
Iakov A. Lyashenko, Valentin L. Popov, Roman Pohrt, Vadym Borysiuk
Summary: In this study, we present the design of a high-precision tribometer laboratory setup. The entire design process is described, starting from concept development to the creation of an accurate 3D model and final assembly of functional parts. The setup is based on a previously designed device, with modifications made to address its limitations. An example is provided to demonstrate data processing and correction for backlash and signal drift errors. The flexibility of the equipment is highlighted, as peripheral parts can be modified without changing the main frame.
Article
Chemistry, Analytical
Quanwei Zhang, Cun Li, Huafeng Li, Yan Liu, Jue Wang, Xiaolong Wang, Yuan Wang, Fabin Cheng, Haijun Han, Peng Zhang
Summary: This paper proposes a quartz resonant pressure sensor for high-precision measurement of ultra-high pressure. The sensor utilizes a push-pull differential layout and an integrated pressure conversion unit, demonstrating high accuracy and stability. Experimental results show that the sensor has high sensitivity and comprehensive accuracy within the pressure range, making it suitable for special pressure measurement fields.
Article
Automation & Control Systems
Dengpeng Xing, Xiwei Liu, Fangfang Liu, De Xu
Summary: This article utilizes a multiple compliant degree-of-freedoms mechanism (i.e., a spring) to facilitate compliant insertion in precision assembly and proposes an efficient insertion strategy accordingly. The addition of a spring increases insertion compliance while making the object not directly controllable. The proposed strategy handles both vertical insertion and inclined insertion with an unknown posture according to force feedback.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2021)
Article
Physics, Multidisciplinary
Christian Baumgartner, Lorenz Fuchs, Linus Fresz, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Michael J. Manfra, Nicola Paradiso, Christoph Strunk
Summary: Simultaneous measurements of Josephson inductance and dc transport characteristics in ballistic Josephson junctions reveal important parameters without the need for phase bias. The method allows for deep probing of devices in the nondissipative regime, showing sensitivity to specific characteristics such as supercurrent interference.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Oliver Gretz, Alfred J. Weymouth, Thomas Holzmann, Korbinian Purckhauer, Franz J. Giessibl
Summary: In lateral force microscopy, utilizing the scanning tunneling microscopy channel for acquiring amplitude and tilt data provides a more accurate and reliable method.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2021)
Article
Physics, Condensed Matter
C. Baumgartner, L. Fuchs, A. Costa, Jordi Pico-Cortes, S. Reinhardt, S. Gronin, G. C. Gardner, T. Lindemann, M. J. Manfra, P. E. Faria Junior, D. Kochan, J. Fabian, N. Paradiso, C. Strunk
Summary: The simultaneous breaking of inversion- and time-reversal symmetry in Josephson junction (JJ) leads to anomalous Josephson effect and magnetochiral anisotropy (MCA) of Josephson inductance. The orientation of the current with respect to the lattice affects the MCA, possibly due to a finite Dresselhaus component, and the two-fold symmetry of the Josephson inductance reflects in the activation energy for phase slips.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Christian Baumgartner, Lorenz Fuchs, Andreas Costa, Simon Reinhardt, Sergei Gronin, Geoffrey C. Gardner, Tyler Lindemann, Michael J. Manfra, Paulo E. Faria Junior, Denis Kochan, Jaroslav Fabian, Nicola Paradiso, Christoph Strunk
Summary: This study introduces the design and application of non-reciprocal superconducting devices. By fabricating and measuring Josephson junctions, researchers have successfully achieved rectification of supercurrent and proposed a semi-quantitative model to explain the experimental data.
NATURE NANOTECHNOLOGY
(2022)
Review
Physics, Applied
Alfred J. Weymouth, Oliver Gretz, Elisabeth Riegel, Franz J. Giessibl
Summary: In this study, we used lateral force microscopy to investigate the energy dissipation in sliding friction. We found that the CO molecule on the tip bends in different directions as it oscillates over pairs of atoms, leading to energy dissipation. Surprisingly, friction was observed only within a specific range of tip heights, indicating the sensitivity of friction to the local potential energy landscape.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Thomas Hofmann, Xinguo Ren, Alfred J. Weymouth, Daniel Meuer, Alexander Liebig, Andrea Donarini, Franz J. Giessibl
Summary: This study presents a method for the transition from graphite to diamond on the atomic scale and reveals the local rehybridization of the structure during this transition. The experimental observation of harmonics at specific thresholds and force reduction provides evidence for the existence of this transition.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Alexander Liebig, Christoph Setescak, Adrian Weindl, Franz J. Giessibl
Summary: This study utilizes high-resolution atomic force microscopy to observe and analyze surface defects in Bi2Se3. The researchers find that all Se vacancies have a positive polarity, confirming them as electron donors. This work provides a new method for accurately determining the physical properties of defects in topological insulators.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Alfred J. Weymouth, Emily Roche, Franz J. Giessibl
Summary: This study investigates the effect of an electron donor on the electronic state by studying mixed islands of PTCDA and CuPc. The results show that the 2DEG state disappears and new states emerge under submonolayer coverage.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Andrea Auer, Bernhard Eder, Franz J. Giessibl
Summary: This paper presents a combined AFM/STM instrument realized with a qPlus sensor and a home-built potentiostat for electrochemical applications. It demonstrates the potential of the instrument by simultaneously imaging graphite with atomic resolution in acidic electrolytes and precisely measuring the interfacial solvent layering as a function of the applied potential.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Theresa Seeholzer, Daniela Tarau, Lea Hollendonner, Andrea Auer, Reinhard Rachel, Dina Grohmann, Franz J. Giessibl, Alfred J. Weymouth
Summary: Researchers compared the S-layer proteins extracted from the archaeon Pyrobaculum aerophilium using atomic force microscopy (AFM) in liquid and ambient conditions with transmission electron microscopy (TEM) images under vacuum conditions. Improved AFM scanning and sample preparation methods allowed the observation of the crystalline structure of the S-layer samples.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Physics, Multidisciplinary
Norio Okabayashi, Thomas Frederiksen, Alexander Liebig, Franz J. Giessibl
Summary: This study reveals the complete manipulation process of a CO molecule on a Cu(110) surface using a combination of noncontact atomic force microscopy and density functional theory simulations. An intermediate state crucial for understanding dynamic friction is found in the reaction pathway during manipulation.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Norio Okabayashi, Thomas Frederiksen, Alexander Liebig, Franz J. Giessibl
Summary: Friction, a complex phenomenon, is studied by simplifying the system through molecular manipulation. In this paper, the authors use noncontact atomic force microscopy, inelastic electron tunneling spectroscopy, and density functional theory calculations to investigate the molecular manipulation process of a single CO molecule on Cu(110) and Cu(111) surfaces. They discover the presence of an important adsorption site that plays a role in the manipulation process and contributes to understanding the dynamics of manipulation and dynamic friction.
Article
Chemistry, Physical
Alexander Liebig, Christoph Setescak, Adrian Weindl, Franz J. Giessibl
Summary: Topological insulators are a type of materials that exhibit semiconducting or insulating properties in their bulk form but possess topologically protected gapless states at their boundaries. This study used high-resolution atomic force microscopy to observe and determine the polarity of surface defects in Bi2Se3. The findings showed that all Se vacancies are electron donors, providing valuable information for accurately determining the physical properties of defects in topological insulators.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Multidisciplinary
Ralf Fischer, Jordi Pico-Cortes, Wolfgang Himmler, Gloria Platero, Milena Grifoni, Dmitriy A. Kozlov, N. N. Mikhailov, Sergey A. Dvoretsky, Christoph Strunk, Dieter Weiss
Summary: This article investigates the topological transition in Josephson junctions based on topological insulator nanowires under different magnetic flux. The results show that the supercurrent is largely trivial at lower magnetic fields, but topological 4pi-periodic supercurrents start to appear at higher magnetic fields.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Alfred J. Weymouth, Mats Persson, Franz J. Giessibl
Summary: This study investigates the growth and structure of a thin insulating layer on Pt(111) by growing monolayer islands of NaCl and using scanning tunneling microscopy (STM) and atomic force microscopy (AFM). The STM images show a square lattice of Cl anions, while the AFM images only resolve approximately two-thirds of the Cl ions. Density functional theory (DFT) calculations reveal the bimodal distribution of the adsorption heights of the Cl anions above the surface, which can explain the AFM observations.
