Article
Materials Science, Multidisciplinary
Wanyu Lu, Hui Liu, Adnan Waqas, Lianchun Long
Summary: This paper systematically investigates the buckling behavior of multilayer pyramid lattice structures, finding that the critical buckling load is influenced by the unit cell size and total height of the structure. The buckling resistance increases with higher relative density. Varying the geometrical properties of the pyramid unit cell allows for the examination of different buckling modes.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Civil
Christovam M. Weidlich, Elisa D. Sotelino, Daniel C. T. Cardoso
Summary: This research aims to investigate the instability of castellated beams and the interaction between lateral-torsional and compression tee local buckling modes. A comprehensive study of 197 simply supported Litzka castellated beams under pure bending was carried out, and a strength prediction equation based on regression techniques was proposed, which showed better accuracy compared to current standards procedures, especially in cases where local and/or interaction failure modes dominate the behavior of the beam. The results also indicated that some of the procedures suggested in standards and guides for the design of castellated beams underestimate or overestimate the failure moment when considering the interaction between global buckling mode and plastification.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Saurabh Mhatre, Elisa Boatti, David Melancon, Ahmad Zareei, Maxime Dupont, Martin Bechthold, Katia Bertoldi
Summary: Inspired by successful buckling-induced reconfigurable structures, a new class of deployable systems utilizing the buckling of curved beams upon rotational input is proposed. Experimental and numerical methods were used to investigate the influence of geometric parameters on the beams' non-linear response. It was demonstrated that a variety of deployable architectures can be achieved by combining curved beams, leading to the construction of deployable furniture such as tables and lamp shades.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Composites
Kangyi Lu, Wenmo Zhu, Qingfu Su, Gang Li, Xiaoping Yang
Summary: The study investigated the effects of high modulus epoxy matrix on composite properties and proposed a compression failure mechanism. Increasing the matrix modulus through chemical cross-linking and mechanical restraint can improve interface properties and increase compressive strength.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Omar Alajarmeh, Xuesen Zeng, Thiru Aravinthan, Tristan Shelley, Mohammad Alhawamdeh, Ali Mohammed, Lachlan Nicol, Alexander Vedernikov, Alexander Safonov, Peter Schubel
Summary: Research on the compressive behavior of Pultruded Fibre Reinforced Polymer (PFRP) profiles reveals that continuous-wound fibers help prevent splitting failure and result in better structural performance in rectangular profiles compared to square profiles. Increasing the Length-to-Depth (L/D) ratio improves displacement buckling capacity but reduces stiffness and strength.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Hee-Du Lee, Swoo-Heon Lee, Kyung-Jae Shin, Jun-Seop Lee
Summary: This paper introduces a new type of corrugated web beam called the partially corrugated web (PCW) beam, which is created by pressing a steel plate into a vertically rounded rectangular shape. Experimental tests were conducted on the PCW beam and a conventional beam to investigate its shear behavior. The results showed that the PCW beam has a high shear strength and large deformation capacity, while maintaining almost the same bending capacity as the conventional beam. The failure modes of the PCW beam include initial local buckling near the boundary and global buckling with diagonal fold lines, whereas the conventional beam only exhibits elastic buckling. The moment capacity of the PCW beam aligns well with design criteria.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Construction & Building Technology
Ahmed M. Sheta, Xing Ma, Yan Zhuge, Mohamed A. ElGawady, Julie E. Mills, El-Sayed Abd-Elaal
Summary: The shear performance of the novel composite cold-formed steel (CFS)/engineered cementitious composites (ECC) section was investigated in this paper. Compared to the lightweight thin-walled CFS sections, the new composite section showed improved buckling and torsional properties due to the restraints provided by thin-layered ECC. Different failure modes were observed in tests, and the composite CFS/ECC section exhibited significantly higher shear capacities compared to other sections. Shear strength prediction formulae for the new composite sections were proposed.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Lan Kang, Shutao Hong, Xinpei Liu
Summary: This study introduces rational design equations for cellular beams with circular or elongated openings based on the Direct Strength Method, verified through a finite element model, to accurately predict shear strength of these beams, including those with multiple openings.
THIN-WALLED STRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
Zizheng Wang, Hao Jiang, Guangfu Wu, Yi Li, Teng Zhang, Yi Zhang, Xueju Wang
Summary: This study reports a method for programmable three-dimensional microfluidic structures assembled from polydimethylsiloxane (PDMS) and shape-memory polymers (SMPs). The approach allows for the creation of diverse geometries and the ability to program temporary shapes, with well-maintained fluid flow during deformation and shape recovery.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Shagang Li, Xiaotong Yu, Shanyin Yang, Hongxiang Wang, Da Chen
Summary: This paper proposes a semi-empirical model based on micromechanical theory for predicting the compressive strength degradation of concrete under an external sulfate attack. The model accurately describes the stress-strain behavior of concrete subjected to sulfate attack and validates the relationship between compressive strength and expansion using experimental results.
Article
Construction & Building Technology
Sivaganesh Selvaraj, Mahendrakumar Madhavan
Summary: This study investigates the experimental and numerical behavior of cold-formed steel built-up beams fabricated from back-to-back sigma sections. A total of 15 tests were conducted, and parametric studies were carried out with 160 specimens. The comparison between numerical results and design predictions by AISI's DSM suggests a new limit for increasing the inelastic reserve buckling strength based on experimental and numerical results.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Materials Science, Ceramics
Marc Neumann, Jana Hubalkova, Claudia Voigt, Joern Grabenhorst, Christos G. Aneziris
Summary: This study investigated the compressive and bending strength of industrially fabricated alumina foams with three different cell sizes. The impact of cell dimensions, loading rate, and specimen aspect ratio on foam structures was examined. Strength data of the open-porous alumina foams were compared using different probability distributions, with the Normal or Log-Normal distribution proving to be the best representation for most test sets.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Biotechnology & Applied Microbiology
Petr Dohnalik, Christian Hellmich, Gilles Richard, Bernhard L. A. Pichler
Summary: The compressive strength evolution of Biodentine, a cement-based dental material cured at 37°C, is quantified experimentally. The material behavior is initially non-linear, but becomes virtually linear elastic after a few hours. The strength evolution can be described as the exponential of a function involving the square root of the inverse of the material age. Multiscale modeling suggests that a large portion of the material volume fails simultaneously due to the presence of calcite-reinforced hydration products.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Civil
Trayana Tankova, Filipe Rodrigues, Carlos Leitao, Claudio Martins, Luis Simoes da Silva
Summary: This paper examines the lateral-torsional buckling behavior of beams in HSS, discusses the design rules for high-strength steel members, and introduces the impact of residual stresses in steel. The study, based on experiments and numerical models, evaluates assumptions for member imperfections and compares them with code recommendations.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Lourenco Almeida-Fernandes, Nuno Silvestre, Joao R. Correia
Summary: This paper introduces a new design methodology to address web-crippling failure in pultruded glass fiber-reinforced polymer I-section beams, utilizing experimental and numerical data for calibration. The study derives approximate formulas for estimating web-buckling and web-crushing loads under different loading cases, and conducts finite-element analysis to enhance the robustness of the design formulations. Unified DSM expressions are found to approximate experimental and numerical results well, providing insights into slenderness ranges triggering web-crippling failure mechanisms.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Chemistry, Multidisciplinary
Makars Siskins, Ekaterina Sokolovskaya, Martin Lee, Samuel Manas-Valero, Dejan Davidovikj, Herre S. J. van der Zant, Peter G. Steeneken
Summary: Coupled nanomechanical resonators made of two-dimensional materials show promise for information processing, but controlling the coupling is a challenge. This study demonstrates strong coupling of motion between suspended membranes of magnetic 2D material FePS3 and introduces a tunable electromechanical mechanism for controlling both frequency and coupling strength. The potential of this electrical coupling in transferring mechanical energy over a distance at low electrical power for novel data readout and information processing technologies is highlighted.
Article
Chemistry, Multidisciplinary
Martin Lee, Martin P. Robin, Ruben H. Guis, Ulderico Filippozzi, Dong Hoon Shin, Thierry C. van Thiel, Stijn P. Paardekooper, Johannes R. Renshof, Herre S. J. van der Zant, Andrea D. Caviglia, Gerard J. Verbiest, Peter G. Steeneken
Summary: This work demonstrates the use of self-sealing membranes to seal the reference cavity beneath, improving the gas permeation time constant. The adhesion increase over SiO2 is mediated by oxygen bonds that are formed at the SiO2/complex oxide interface during the self-sealing anneal.
Article
Chemistry, Multidisciplinary
Werner M. Schosser, Chunwei Hsu, Patrick Zwick, Katawoura Beltako, Diana Dulic, Marcel Mayor, Herre S. J. van der Zant, Fabian Pauly
Summary: The study investigates quantum interference phenomena in molecular electronics at ambient conditions by connecting two porphyrins and mechanically controlling electric transport. The combination of experimental and theoretical methods reveals variations in electrical conductivity during molecular stretching and confirms the mechanosensitive response of molecular junctions. The study also observes uncommon frequency responses in periodic electrode modulation experiments, further confirming predicted transmission dips caused by rearrangement of molecular orbitals.
Article
Chemistry, Physical
Frederik H. van Veen, Luca Ornago, Herre S. J. van der Zant, Maria El Abbassi
Summary: This study investigates the variation in conductance values of alkanes using the mechanically controlled break junction technique. By analyzing the time evolution and distance dependence of the measured traces, the single-molecule conductance values for fully stretched molecular configurations are determined. The results provide crucial information for determining the molecular junction configuration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Multidisciplinary
Chunwei Hsu, Theo A. Costi, David Vogel, Christina Wegeberg, Marcel Mayor, Herre S. J. van der Zant, Pascal Gehring
Summary: Probing the universal low-temperature magnetic field scaling of Kondo-correlated quantum dots via electrical conductance has proven to be experimentally challenging. In this study, we demonstrate how to probe this phenomenon using nonlinear thermocurrent spectroscopy applied to a molecular quantum dot in the Kondo regime. Our findings show that bias-dependent thermocurrent is a sensitive probe of the universal Kondo physics, allowing for direct measurement of the splitting of the Kondo resonance in a magnetic field, and opening up possibilities for investigating nanosystems far from thermal and electrical equilibrium.
PHYSICAL REVIEW LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Jacqueline A. Labra-Munoz, Arie de Reuver, Friso Koeleman, Martina Huber, Herre S. J. van der Zant
Summary: This study reports the fabrication process of single-electron devices based on horse-spleen ferritin particles, and demonstrates the significance of single-electron charge transport in ferritin through the excellent agreement between experimental data and the Coulomb blockade theory, which provides potential for further characterization and applications in electronic and medical fields.
Article
Chemistry, Multidisciplinary
Senthil Kumar Kuppusamy, Asato Mizuno, Amador Garcia-Fuente, Sebastiaan van der Poel, Benoit Heinrich, Jaime Ferrer, Herre S. J. van der Zant, Mario Ruben
Summary: This study reports on the spin-state switching characteristics of supramolecular iron(II) complexes and reveals the spin-state dependence of conductance through single-molecule conductance traces. Density functional theory is used to study the stretching-induced spin-state switching in the complexes.
Article
Nanoscience & Nanotechnology
Makars Siskins, Samer Kurdi, Martin Lee, Benjamin J. M. Slotboom, Wenyu Xing, Samuel Manas-Valero, Eugenio Coronado, Shuang Jia, Wei Han, Toeno van der Sar, Herre S. J. van der Zant, Peter G. Steeneken
Summary: This study investigates the mechanical and magnetic properties of two-dimensional magnetic materials as well as their variations with temperature and strain through the use of suspended thin film resonators. By compensating for the negative thermal expansion coefficient with heterostructures, the possibility of detecting multiple magnetic phase transitions in a single heterostructure is demonstrated. Lastly, a strain-induced enhancement of Curie temperature is achieved in a suspended heterostructure.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Physics, Applied
Katsuhiko Nishiguchi, Hiroshi Yamaguchi, Akira Fujiwara, Herre S. J. van der Zant, Gary A. Steele
Summary: We have demonstrated charge detection with single-electron resolution at high readout frequency using a silicon field-effect transistor integrated with double resonant circuits. The transistor, with a channel width of 10 nm, can detect a single electron at room temperature. The transistor is connected to resonant circuits composed of coupled inductors and capacitors, providing two resonance frequencies. By driving the transistor with a carrier signal at the lower resonance frequency, a small signal applied to the transistor's gate modulates the resonance condition, resulting in a reflected signal appearing near the higher resonance frequency. This operation allows for charge detection with a single-electron resolution of 3 x 10(-3) e/Hz(0.5) and a readout frequency of 200 MHz at room temperature.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Amit S. Pawbake, Ruchita T. Khare, Joshua O. Island, Eduardo Flores, Jose R. Ares, Carlos Sanchez, Isabel J. Ferrer, Mahendra Pawar, Otakar Frank, Mahendra A. More, Herre S. J. van der Zant, Andres Castellanos-Gomez, Dattatray J. Late
Summary: The field emission properties of TiS3 nanosheets and nanoribbons synthesized from bulk titanium were investigated. The nanosheets exhibited enhanced field emission behavior with a low turn-on field and delivered a large emission current density at a relatively low applied electric field. The superior field emission performance of TiS3 nanosheets over nanoribbons makes them a propitious field emitter for vacuum nanoelectronics devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Physics, Applied
Serhii Volosheniuk, Damian Bouwmeester, Chunwei Hsu, H. S. J. van der Zant, Pascal Gehring
Summary: Thermocurrent flowing through a single-molecule device provides valuable information about its quantum properties, electronic and phononic excitation spectra, and entropy. Experimentally measuring the thermoelectric heat-to-charge conversion efficiency can help select suitable molecules for highly efficient energy conversion devices predicted by theoretical studies. A superconductor-normal metal-superconductor Josephson junction thermometer is incorporated into the single-molecule device to accurately determine the temperature bias. This device architecture enables precise thermoelectric experiments on individual molecules at millikelvin temperatures.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Chunwei Hsu, Michael Rohde, Gabriela Borin Barin, Guido Gandus, Daniele Passerone, Mathieu Luisier, Pascal Ruffieux, Roman Fasel, Herre S. J. van der Zant, Maria El Abbassi
Summary: Creating a good contact between electrodes and graphene nanoribbons (GNRs) has been a long-standing challenge in the search for the next generation GNR-based nanoelectronics. This study successfully transfers armchair-edged GNRs grown on Au(111)/mica substrates to pre-patterned platinum electrodes, resulting in polymer-free field-effect transistor devices. The devices exhibit significantly lower resistance compared to previous reports, and density functional theory calculations show that platinum has strong coupling and higher transmission compared to graphene.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Mattias Matthiesen, Jorrit R. Hortensius, Samuel Manas-Valero, Itzik Kapon, Dumitru Dumcenco, Enrico Giannini, Makars Siskin, Boris A. Ivanov, Herre S. J. van der Zant, Eugenio Coronado, Alexey B. Kuzmenko, Dmytro Afanasiev, Andrea D. Caviglia
Summary: The research focuses on investigating optical methods for generating coherent magnons in antiferromagnetic insulators. It is found that orbital transitions are key targets for magnetic control in insulators with zero orbital angular momentum.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Gabriele Baglioni, Roberto Pezone, Sten Vollebregt, Katarina Cvetanovic Zobenica, Marko Spasenovic, Dejan Todorovic, Hanqing Liu, Gerard J. Verbiest, Herre S. J. van der Zant, Peter G. Steeneken
Summary: This study investigates the acoustic response of suspended graphene membranes for microphone applications using laser vibrometry. It demonstrates superior mechanical sensitivities and a lower limit of detection compared to current MEMS microphones.
Article
Chemistry, Multidisciplinary
Chunwei Hsu, Werner M. Schosser, Patrick Zwick, Diana Dulic, Marcel Mayor, Fabian Pauly, Herre S. J. van der Zant
Summary: This article reports a method to probe and control intra- and intermolecular interactions in a single molecule using conductance measurement. The experimental results show an exceptional exponential rise in conductance response by two orders of magnitude. The theoretical study explains the observed behavior by mechanical activation and strengthening of through-bond transport and through-space coupling.
