Review
Engineering, Electrical & Electronic
Adarsh Singh, Debasis Mitra, Bappaditya Mandal, Partha Basuchowdhuri, Robin Augustine
Summary: Recent breakthroughs in antennas, electromagnetic sensors, propagation, and advanced materials have opened up new opportunities for body area sensing, disease detection, and continuous monitoring. This paper provides an in-depth exploration of the challenges and prospects associated with electromagnetic sensors, and offers a roadmap for their future development.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Artem Kozlovskiy, Ignat Golota, Maxim Zdorovets, Daria Tishkevich, Tatiana Zubar, Alex Trukhanov
Summary: The study focused on the influence of applied potentials difference on the structural, magnetic, and conductive properties, as well as the phase composition of Co nanowires obtained by electrochemical synthesis. Different applied potentials led to the formation of nanowires with varying crystal lattice structures and phase compositions, showcasing the impact of applied potentials on the nanowires' performance.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Multidisciplinary Sciences
Mohammad Alibakhshikenari, Bal S. Virdee, Shahram Salekzamankhani, Sonia Aissa, Chan H. See, Navneet Soin, Sam J. Fishlock, Ayman A. Althuwayb, Raed Abd-Alhameed, Isabelle Huynen, James A. McLaughlin, Francisco Falcone, Ernesto Limiti
Summary: This research demonstrates the effectiveness of using SIW technology to enhance the performance of antenna arrays for sub-THz integrated circuit applications, achieving significant improvements in isolation, radiation gain, and efficiency. The proposed approach shows the viability of developing antenna arrays for sub-THz integrated circuits.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Rohan Katti, Shanthi Prince
Summary: A cascaded double ring resonator based microwave photonic system is capable of generating millimeter wave signals suitable for 5G small cell applications. By adjusting coupling coefficients, high power millimeter wave signals can be generated at specific frequencies.
Article
Multidisciplinary Sciences
Valeria Lazzoni, Danilo Brizi, Agostino Monorchio
Summary: In this paper, the design of spatial filtering magnetic metasurfaces for improving the efficiency of misaligned wireless power transfer (WPT) systems is presented. An analytical framework is developed to control the currents and manipulate the spatial magnetic field distribution on a finite-size metasurface. Numerical simulations and experimental measurements on fabricated prototypes validate the proposed approach, which is particularly helpful for WPT applications with frequently changing coil positions.
SCIENTIFIC REPORTS
(2023)
Review
Chemistry, Analytical
Rammah Ali Alahnomi, Zahriladha Zakaria, Zulkalnain Mohd Yussof, Ayman Abdulhadi Althuwayb, Ammar Alhegazi, Hussein Alsariera, Norhanani Abd Rahman
Summary: Recent developments in microwave planar sensors have sparked renewed interest in industrial, chemical, biological, and medical applications for real-time, non-invasive material property measurements. While these sensors offer advantages such as compact size, low cost, and ease of fabrication, challenges remain in their sensitivity and selectivity. Developing high-sensitivity sensors is crucial for accurate complex permittivity measurements, and further research is needed to enhance their normalized sensitivity for broader material characterization applications.
Article
Chemistry, Multidisciplinary
Soham Saha, Mustafa Goksu Ozlu, Sarah N. Chowdhury, Benjamin T. Diroll, Richard D. Schaller, Alexander Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: The unique properties of emerging photonic materials, conducting nitrides and oxides, are explored in this study. The optical properties of polycrystalline titanium nitride and aluminum-doped zinc oxide can be controlled by tailoring the film thickness. The study demonstrates their potential for ENZ-enhanced photonic applications, including optical circuitry, tunable metasurfaces, and nonlinear optical devices.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Gerhard Ulbricht, Mario De Lucia, Eoin Baldwin
Summary: MKIDs have emerged as a promising novel low temperature detector technology, with unrivaled scalability that makes them attractive for observational astronomy, particle physics, material science, and THz imaging applications. This review aims to provide a comprehensive list of potential starting points for more in-depth research in various fields benefiting from kinetic inductance detectors.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Tanveerul Haq, Slawomir Koziel
Summary: Design optimization of multivariable resonators is important in the field of microwave sensors. This article proposes a novel methodology for rapid redesign and parameter tuning of complementary split-ring resonators. The approach involves inverse surrogate models and analytical correction techniques to enable rapid adjustment of geometry parameters and optimization over broad frequency ranges. Experimental validation demonstrates the effectiveness of the proposed method and the practical usefulness of the CSRR structure.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Materials Science, Ceramics
Renu Gupta, Eun Young Kim, Hyo-Soon Shin, Ga-Yeon Lee, Dong-Hun Yeo
Summary: (Al1-xBx)2Mo3O12 ceramics with double phases were prepared for LTCC application through solid-phase sintering. The composition consists of the coexistence of monoclinic and orthorhombic structures, with increased orthorhombic phase due to boron substitution. The ceramics demonstrate outstanding microwave dielectric properties and high relative density, making them a promising candidate for LTCC substrate material.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Multidisciplinary
Adnan Yousaf, Abdul Wakeel, Zeeshan Zahid, Mudassir Murtaza, Adil Masood Siddiqui, Muhammad Imran
Summary: We propose a highly efficient, deca-band, and single-layered metasurface absorber based on the idea of split-ring resonators. The proposed structure offers absorption peaks of more than 90% at 10 distinct frequencies and demonstrates angular stability and polarization insensitivity.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Engineering, Electrical & Electronic
Chiara Ramella, Marco Pirola, Simone Corbellini
Summary: This paper highlights the significance of microwave resonators in metrology applications, emphasizing that using high-quality-factor resonators can achieve high sensitivity, leading to improved measurement precision and accuracy. To accurately measure the resonance frequency of high-Q resonators and obtain low measurement uncertainty, the entire measurement set-up must be carefully designed.
IEEE JOURNAL OF MICROWAVES
(2021)
Article
Engineering, Electrical & Electronic
Yagmur Ceren Alatas, Uzay Tefek, Burak Sari, Mehmet Selim Hanay
Summary: In this study, three-dimensional liquid electrodes made of Galinstan were integrated with a microwave resonator in a microfluidic system, allowing for the measurement and analysis of mixed particles without the need for particle position calibration.
IEEE JOURNAL OF MICROWAVES
(2023)
Article
Engineering, Electrical & Electronic
Yongle Wu, Haopeng Wu, Weimin Wang, Yuhao Yang, Zhiguo Lai, Qinghua Yang
Summary: This brief presents a complete design flow for a compact low-loss high-selectivity excellent-isolation LTE Band3 (B3) duplexer (TX: 1710 MHz-1785 MHz, RX: 1805 MHz-1880 MHz), based on the thin film bulk acoustic resonator (FBAR). The effects of temperature drift, resonator performance distribution, quality factor of inductance, device yield, and power density distribution are described. The measured results show good consistency with the co-simulation results, achieving minimum IL, rejection, and isolation simultaneously.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Biotechnology & Applied Microbiology
Jirui Wang, Zhiyang Li, Zhiyong Gu
Summary: This article provides a comprehensive review of template-synthesized multi-component nanowire structures and their fabrication methods, emphasizing the potential applications of multi-component nanowires in various fields such as sensors and actuators.
SENSORS AND ACTUATORS REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Jonas Milani, Felipe Saenz, Christophe Roussel, Jean-Philippe Ansermet
Summary: This article reports a scalar-coupling dominated H-1 O-DNP using polyaniline as a polarizing agent in an aqueous solution.
MAGNETIC RESONANCE IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kaikai Chen, Adnan Choudhary, Sarah E. Sandler, Christopher Maffeo, Caterina Ducati, Aleksei Aksimentiev, Ulrich F. Keyser
Summary: High-resolution analysis of biomolecules has greatly advanced biosensing, but there are limited methods available for high-resolution analysis of unlabeled single molecules in their native states. In this work, label-free electrical sensing of single molecules with nanometer resolution is demonstrated using a narrow solid-state nanopore. The super-resolution ability is attributed to the enhancement of the electric field at the tip of the nanopore induced by nanostructures. This work presents a general approach to improve the resolution of single-molecule nanopore sensing and has implications for label-free high-resolution DNA sequence mapping and digital information storage.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Lutong Sheng, Mehrdad Elyasi, Jilei Chen, Wenqing He, Yizhan Wang, Hanchen Wang, Hongmei Feng, Yu Zhang, Israa Medlej, Song Liu, Wanjun Jiang, Xiufeng Han, Dapeng Yu, Jean-Philippe Ansermet, Gerrit E. W. Bauer, Haiming Yu
Summary: In this study, nonlocal three-magnon scattering between spatially separated magnetic systems was observed. A high-frequency magnon splits into two low-frequency magnons with conserved linear momentum. The experimental results agree well with model calculations based on the interlayer dipolar interaction. This finding has the potential to enable quantum entanglement between distant magnons for quantum information applications.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Yanfei Zhao, Mukesh Tripathi, Kristians Cernevics, Ahmet Avsar, Hyun Goo Ji, Juan Francisco Gonzalez Marin, Cheol-Yeon Cheon, Zhenyu Wang, Oleg V. Yazyev, Andras Kis
Summary: Defects in solids can affect the electrical and optical properties of semiconductors, and the influence of defects in 2D semiconductors needs to be understood. By using DLTS, aberration-corrected STEM imaging, and theoretical calculations, the study reveals that sulfur vacancy pairs in monolayer MOCVD-grown material introduce additional trap states, which have a significant impact on the performance of field-effect transistors based on 2D semiconductors.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Kristians Cernevics, Martin Fuechsle, Matthew Broome, Mohammad Choucair, Oleg V. Yazyev
Summary: Carbon nano-onions, a type of nanomaterials, show potential as building blocks for spintronics and quantum information processing devices due to their long electron spin relaxation times at room temperature. However, understanding of the electronic and magnetic properties of these nanostructures is still lacking. In this study, we investigate the origin of the metallic-like behavior observed in disordered nano-onions. Using a density functional tight-binding approach, we develop realistic models of highly disordered nano-onions comprised of nanometer-scale graphitic flakes. We find that various factors such as flake size, edge structure, and substituent groups can cause in-gap metallic states, effectively closing the HOMO-LUMO gap.
Article
Chemistry, Physical
Zachary Ruff, Chloe S. Coates, Katharina Marker, Amoghavarsha Mahadevegowda, Chao Xu, Megan E. Penrod, Caterina Ducati, Clare P. Grey
Summary: Nickel-rich layered oxide cathodes like NMC811 have high practical capacities, approaching 200 mAh/g. Delithiation of NMC811 results in a solid-solution behavior, maintaining the same layered structure. However, further delithiation is kinetically challenging and there are side reactions between the electrolyte and cathode surface.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
ShengNan Zhang, Bo Xie, QuanSheng Wu, Jianpeng Liu, Oleg V. Yazyev
Summary: We propose chiral decomposition rules for twisted N + M multilayer graphene configurations, which include arbitrary stacking order and mutual twist. In the chiral limit at the magic angle, the low-energy bands of these systems consist of chiral pseudospin doublets energetically entangled with two flat bands per valley induced by the moire superlattice potential. Numerical calculations based on realistic parametrization support the analytic construction. We also demonstrate that vertical displacement fields can open energy gaps between the pseudospin doublets and the two flat bands, allowing the flat bands to carry nonzero valley Chern numbers. These findings provide guidelines for the rational design of topological and correlated states in generic twisted graphene multilayers.
Article
Chemistry, Multidisciplinary
Yifei Guan, Oleg Yazyev, Alexander Kruchkov
Summary: In this study, we propose a novel mechanism for generating higher-Chern flat bands using twisted bilayer graphene (TBG) coupled with topological magnetic structures known as the skyrmion lattice. By matching the periodicities of the skyrmion and the moire pattern, we discover the emergence of dispersionless electronic bands with vertical bar C vertical bar = 2. The statistics of the charge-carrying excitations in this case follow bosonic behavior, with Q = 2e, indicating even units of electron charge. The realistic lower bound of the skyrmion coupling strength for triggering the topological phase transition is estimated to be 4 meV. The presence of the skyrmion order in TBG leads to an unexpected quantum Hall conductance sequence of +/- 2e(2)/h, +/- 4e(2)/h, ... in the Hofstadter butterfly spectrum.
Article
Multidisciplinary Sciences
Chunyu Guo, A. Alexandradinata, Carsten Putzke, Amelia Estry, Teng Tu, Nitesh Kumar, Feng-Ren Fan, Shengnan Zhang, Quansheng Wu, Oleg V. Yazyev, Kent R. Shirer, Maja D. Bachmann, Hailin Peng, Eric D. Bauer, Filip Ronning, Yan Sun, Chandra Shekhar, Claudia Felser, Philip J. W. Moll
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Kristians Cernevics, Oleg Yazyev
Summary: While bottom-up synthesis offers precise control over the properties of graphene nanoribbons (GNRs), certain precursor molecules can lead to edge defects called 'bite' defects. The adverse effect of these defects on electronic transport properties in chevron-type GNRs is investigated. The study shows how the defects can be engineered to construct nanoelectronic components and improve conductance in nanostructures.
ELECTRONIC STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Bolong Zhang, Kieran D. Richards, Beatrice E. Jones, Abigail R. Collins, Rosie Sanders, Sarah R. Needham, Pu Qian, Amoghavarsha Mahadevegowda, Caterina Ducati, Stanley W. Botchway, Rachel C. Evans
Summary: This study demonstrates the first example of triplet-triplet annihilation upconversion (TTA-UC) based lifetime imaging microscopy. Ultra-small nanoparticle (NP) probes were used to overcome background autofluorescence and achieve excellent image contrast and oxygen mapping in living cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Federico De Biasi, Michael A. Hope, Claudia E. Avalos, Ganesan Karthikeyan, Gilles Casano, Aditya Mishra, Saumya Badoni, Gabriele Stevanato, Dominik J. Kubicki, Jonas Milani, Jean-Philippe Ansermet, Aaron J. Rossini, Moreno Lelli, Olivier Ouari, Lyndon Emsley
Summary: Photochemically induced dynamic nuclear polarization (photo-CIDNP) is an NMR hyperpolarization technique that uses light to excite a donor-acceptor system and create a spin-correlated radical pair for nuclear hyperpolarization. This study demonstrates optically enhanced solid-state H-1 NMR spectroscopy in the high-field regime, achieving a 16-fold signal enhancement using photo-CIDNP. These findings offer a new strategy for hyperpolarized NMR beyond conventional microwave-driven DNP.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Gabriele Pasquale, Edoardo Lopriore, Zhe Sun, Kristians Cernevics, Fedele Tagarelli, Kenji Watanabe, Takashi Taniguchi, Oleg V. Yazyev, Andras Kis
Summary: In this study, indium selenide (InSe) is used as a two-dimensional flat-band system to investigate tunnelling photocurrents. The presence of van Hove singularity at the flat band is found to cause a sharp change in tunnelling mechanisms. Tunnelling currents are shown to be a reliable probe for detecting the energy position of the van Hove singularity in a van der Waals flat-band system, even at room temperature.
NATURE NANOTECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Marta Brzezinska, Yifei Guan, Oleg Yazyev, Subir Sachdev, Alexander Kruchkov
Summary: We investigate the interactions of disordered graphene flakes consisting of up to 300,000 atoms (-100 nm in diameter) subject to an out-of-plane magnetic field B of 5-20 Tesla using the Sachdev-Ye-Kitaev (SYK) framework. We study two sources of disorder: (i) irregularities at the system boundaries, and (ii) bulk vacancies, and find conditions under realistic experimental conditions above the liquid helium temperature that could favor the formation of the phase with Sachdev-Ye-Kitaev features.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Luc Bondaz, Anshaj Ronghe, Shaoxian Li, Kristians Cernevics, Jian Hao, Oleg V. Yazyev, K. Ganapathy Ayappa, Kumar Varoon Agrawal
Summary: This study achieves precise control of Å-scale pores formation in graphene by controlling the oxidation temperature. By utilizing the core/shell structure of clusters and light gasification, improved control over pore formation is achieved compared to thermal gasification. The research also finds that these pores can differentiate CH4 from N-2, indicating potential separation applications.
