Article
Engineering, Electrical & Electronic
Akash Buragohain, Gouree Shankar Das, Yatish Beria, Ahmed Jamal Abdullah Al-Gburi, Partha Protim Kalita, Trishna Doloi
Summary: This paper presents a highly sensitive differential Hexagonal Split Ring Resonator (HSRR) sensor operating at 5.3 GHz for characterizing the permittivity of organic liquids. The sensor design is based on a hexagonal shape, which allows for better field concentration and power transfer. The sensor is capable of accurately determining the complex permittivity of unknown liquid samples with high sensitivity and immunity to environmental fluctuations.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Anand Kumar, Manvendra Singh Rajawat, Santosh Kumar Mahto, Rashmi Sinha
Summary: A metamaterial-based complementary split ring resonator structure is used to develop a sensor for dielectric characterization of fluids, with an empirical relationship established between dielectric properties and resonance frequency and Q-factor. A second-order polynomial function is employed for curve fitting and multi-variate polynomial regression is used to determine coefficients, achieving high accuracy in predicting complex permittivity. The sensor design is simple, with high sensitivity and requiring a small sample volume.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Analytical
Alejandro Rivera-Lavado, Alejandro Garcia-Lamperez, Maria-Estrella Jara-Galan, Emilio Gallo-Valverde, Paula Sanz, Daniel Segovia-Vargas
Summary: This paper proposes a low-cost passive sensor for real-time permittivity characterization of hydrocarbon fluids. The sensor's characterization is performed through both full-wave simulation and measurements, demonstrating its effectiveness in discriminating different types of crude and estimating their properties.
Article
Chemistry, Analytical
Khuzairi Masrakin, Siti Zuraidah Ibrahim, Hasliza A. Rahim, Saidatul Norlyana Azemi, Ping Jack Soh, Sugchai Tantiviwat
Summary: This paper analyzes a microwave resonator sensor based on a square split-ring resonator operating at 5.122 GHz for permittivity characterization of a material under test (MUT). A single-ring square resonator edge (S-SRR) is coupled with several double-split square ring resonators to form the structure (D-SRR). The function of the S-SRR is to generate a resonant at the center frequency, whereas D-SRRs function as sensors, with their resonant frequency being very sensitive to changes in the MUT's permittivity.
Article
Chemistry, Analytical
Mohammad Alibakhshikenari, Bal S. Virdee, Taha A. Elwi, Innocent D. Lubangakene, Renu K. R. Jayanthi, Amer Abbood Al-Behadili, Zaid A. Abdul Hassain, Syed Mansoor Ali, Giovanni Pau, Patrizia Livreri, Sonia Aissa
Summary: This paper presents a non-invasive measurement technique to determine the permittivity of materials based on a modified metamaterial unit-cell sensor. By tightly coupling opposite sides of the sensor, two distinct resonant modes are excited, and perturbation of the fundamental mode is used to determine the permittivity. The sensitivity of the sensor is enhanced four-fold by constructing a tri-composite split-ring resonator.
Article
Optics
Xiaocan Xu, Ruijia Xu, Yu-Sheng Lin
Summary: The research proposes a design of tunable double split-ring metamaterial in the terahertz frequency range, demonstrating switchable characteristics between single-resonance and dual-resonance with polarization sensitivity, within the frequency range of 0.16 THz to 0.21 THz. Tunability and stability of DSRM can be achieved by changing the gap between two SRRs or the distance between face-to-face SRRs.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Hadi Teguh Yudistira, Muhammad Asril
Summary: This study utilized single symmetry split-ring resonator (SRR) for biosensor applications, comprehensively observing the behavior of the applied mechanism by altering the substrate refractive index, and evaluating numerical functions using CST microwave studio, resolving Maxwell's equation by finite integration technique (FIT). The impedance of SRR metamaterial tends to decrease with increasing refractive index for both the substrate and initial substance, influencing permittivity and permeability.
Article
Chemistry, Analytical
Matko Martinic, Tomislav Markovic, Adrijan Baric, Bart Nauwelaers
Summary: This study proposes a novel CSRR metamaterial structure for label-free dielectric spectroscopy of liquids in microplates, demonstrating scalability and potential for large-scale microplate experiments through the combination of sensor arrays and microplates.
Article
Instruments & Instrumentation
Kunal Kumar Singh, Santosh Kumar Mahto, Rashinz Sinha, Vishnu Priye
Summary: This paper proposes a triple-notch metamaterial-based sensor for solid dielectric characterization, which determines the dielectric constant of the material under test by using the relationship between three resonant frequencies and dielectric properties. The proposed sensor has a simple structure, meets the requirements of miniaturization, compact size, low cost, and improved sensitivity.
Article
Engineering, Electrical & Electronic
G. Husna Khouser, Yogesh K. Choukiker
Summary: This article introduces a unique 3D metamaterial split ring resonator (3D-MTM SRR) with a high negative refractive index at 2.45 GHz frequency. The structure consists of two layers connected by metallic vias. Simulation and experiment results show good agreement in terms of the negative refractive index and effective medium ratio. An analogous circuit analysis is conducted to better understand the resonance phenomena of the proposed structure. Therefore, the 3D-MTM SRR can be used for the development of high-performance radio frequency devices for IoT applications.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2022)
Article
Astronomy & Astrophysics
Moein Navaei, Pejman Rezaei, Sina Kiani
Summary: This paper evaluates the human milk dielectric constant using a microwave sensor. The proposed sensor combines a simple microstrip line and a split ring resonator, with a resonance frequency of 6 GHz. When up to 30 μl of milk is placed on the sensing area of the sensor, it causes a shift in the resonance frequency. The dielectric constant of six human milk samples was measured using a network analyzer, and three similar samples were measured using the built-in sensor. The microwave sensor has a Q-factor of 38 and a sensitivity of 0.17%. It demonstrates acceptable performance compared to previous sensors, providing a simple method for determining the normal behavior of human milk with a small sample requirement.
Article
Engineering, Electrical & Electronic
Jianbing Xie, Junwu Chen, Zihan Li, Weizheng Yuan
Summary: This paper presents a flexible double-sided attached microwave sensor film for real-time measurement of liquid dielectric constant. The film is composed of a ground film with a nested-complementary split ring resonator (NCSRR) structure and a U-shaped microstrip line film. Two types of microwave sensors are formed by attaching the films to both sides of borosilicate glass and polypropylene beakers. The resonant frequencies of the sensors are linearly and negatively correlated with the dielectric constant of the liquid to be measured.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Fulya Bagci, Mustafa Suphi Gulsu, Baris Akaoglu
Summary: This paper proposes a dual-band metamaterial-based sensor for determining the complex dielectric constant of ethanol-methanol mixtures. The sensor structure incorporates dual H-shaped slot resonators and a rectangular copper patch to provide two distinct resonance frequencies. The sensor shows good accuracy and sensitivity, and it has the advantages of small size, flexibility, noncontact, and reusability.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Multidisciplinary Sciences
Yunhao Cao, Cunjun Ruan, Kanglong Chen, Xingyun Zhang
Summary: This paper proposes an Asymmetric Electric Split-Ring Resonator (AESRR) metamaterial structure to explore the interaction between metamaterials and electromagnetic waves with the influence of Fano resonance. A microwave sensor based on AESRR arrays is designed and verified using printed circuit board technology. The results show improved sensitivity and frequency shift for material detection compared to conventional sensors.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Chen Wang, Xiaoming Liu, Zhixiang Huang, Shuo Yu, Xiaofan Yang, Xiaobang Shang
Summary: This paper presents a sensor based on multi-element complementary split-ring resonator for liquid material measurement. The resonator is designed with three split rings to enhance measurement sensitivity. Experimental results show that the proposed sensor offers great accuracy in measuring liquid materials, demonstrated by measuring ethanol solutions with different concentrations.
Article
Physics, Applied
Jimin Wang, Alexander Kurzendorfer, Lin Chen, Zhiwei Wang, Yoichi Ando, Yang Xu, Ireneusz Miotkowski, Yong P. Chen, Dieter Weiss
Summary: The study found that in a high-quality three-dimensional topological insulator film, carrier density can be independently tuned on top and bottom surfaces using gate electrodes, resulting in different conduction channels with varying mobility and density.
At low temperatures, conduction is dominated by Dirac surface states, leading to only two dominant conduction channels, while at high temperatures, a third channel emerges due to bulk effects, with different mobility and density characteristics.
APPLIED PHYSICS LETTERS
(2021)
Article
Polymer Science
Gabriela Broncova, Tereza Slaninova, Miroslava Trchova, Vadim Prokopec, Pavel Matejka, Tatiana Shishkanova
Summary: This study focused on the visualization of latent fingerprints on brass surfaces using electrochemical deposition of a polymer film based on poly(neutral red) (PNR). Experimental findings showed that this method is a significant advancement in the field and offers a new approach for criminalists in combating crime.
Article
Chemistry, Analytical
Tatiana Shishkanova, Eva Pospisilova, Vadim Prokopec
Summary: This work demonstrates the analytical applicability of single ion-selective membranes and potentiometric sensor array in distinguishing and detecting cathinone derivatives. The combination of PCA and ISMs allowed effective discrimination of various synthetic cathinones and their recognition from a mixture. The ISM containing 1wt% calix[4]arene derivative showed sufficient analytical parameters to detect cathinones in both model and saliva samples.
Review
Chemistry, Analytical
Shavkat Nizamov, Simona Dimchevska Sazdovska, Vladimir M. Mirsky
Summary: The development of nanotechnology has posed new challenges to analytical science, specifically in the ultrasensitive detection and characterization of nanoparticles in complex media. This review focuses on analyzing various approaches and physical principles, with particular emphasis on optical methods. The detection and analysis of nanoparticles in volume and on surfaces are discussed, highlighting the intensive development of surface sensing technologies. The wide-field surface plasmon resonance microscopy is highlighted as a novel and effective tool for ultrasensitive detection and chemical identification of individual nanoparticles.
ANALYTICA CHIMICA ACTA
(2022)
Article
Electrochemistry
Dalibor Karacic, Sanjin J. Gutic, Borislav Vasic, Vladimir M. Mirsky, Natalia V. Skorodumova, Slavko V. Mentus, Igor A. Pasti
Summary: In this study, the kinetics and mechanism of graphene oxide (GO) reduction were investigated using various techniques and theoretical calculations. The results provide valuable insights for precise control of reduction degree and conductive area percentage, enabling tailored reduced GO for specific electrochemical applications.
ELECTROCHIMICA ACTA
(2022)
Article
Multidisciplinary Sciences
Robin Huber, Max-Niklas Steffen, Martin Drienovsky, Andreas Sandner, Kenji Watanabe, Takashi Taniguchi, Daniela Pfannkuche, Dieter Weiss, Jonathan Eroms
Summary: In this study, band conductivity oscillations in a graphene superlattice were experimentally observed. These oscillations are governed by the internal structure of the Hofstadter butterfly (Brown-Zak oscillations) and a commensurability relation between the electron cyclotron radius and the superlattice period (Weiss oscillations). A complete description of the oscillations in two-dimensional superlattices was obtained, showing a detailed match between theory and experiment.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
M. Knorr, J. M. Manceau, J. Mornhinweg, J. Nespolo, G. Biasiol, N. L. Tran, M. Malerba, P. Goulain, X. Lafosse, M. Jeannin, M. Stefinger, I Carusotto, C. Lange, R. Colombelli, R. Huber
Summary: The ultrafast scattering dynamics of intersubband polaritons in dispersive cavities embedding GaAs/AlGaAs quantum wells were directly studied using a noncollinear pump-probe geometry with phase-stable midinfrared pulses. Selective excitation of the lower polariton at a frequency of similar to 25 THz and at a finite in-plane momentum k(parallel to) resulted in the emergence of a narrowband maximum in the probe reflectivity at k(parallel to) = 0. A quantum mechanical model identified the underlying microscopic process as stimulated coherent polariton-polariton scattering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Karolina Salvadori, Jakub Marian Pales, Tatiana Shishkanova, Miroslava Trchova, Radek Fajgar, Pavel Matejka, Petra Curinova
Summary: This study reports the design and synthesis of polymerizable urea-based receptors that interact with HVA and VMA, and the preparation of a sensor with the best anion recognition properties. The sensor shows a good response to VMA and demonstrates good selectivity in the presence of HVA and phosphates in urine.
Article
Chemistry, Analytical
Yulia Efremenko, Vladimir M. Mirsky
Summary: The electrochemical activity of 3-thienylboronic acid makes it a promising receptor material for sensor applications. The highest binding enthalpy was observed for sorbitol and fructose, with a significant increase in binding enthalpy and constant with pH change.
Article
Materials Science, Multidisciplinary
Tatiana Shishkanova, Tomas Tobrman, Jaroslav Otta, Gabriela Broncova, Premysl Fitl, Martin Vrnata
Summary: This manuscript presents the preparation and characterization of polymer layers on platinum electrodes using cyclic voltammetry. The response of the prepared polymers as active/sensitive media in two types of sensors was evaluated, and it was found that the nature of the substituent attached to the thiophene ring significantly affects the properties of the polymer layer.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Analytical
Eva Pospisilova, Natalie Paskanova, Martin Kuchar, Tatiana V. V. Shishkanova
Summary: This study presents a potentiometric approach for detecting two cathinone derivatives. The cation-exchanger as the active component of the ion-selective membrane showed a near-Nernstian response and selectivity for one of the derivatives in oral fluids. The agreement between the results obtained with this approach and another method demonstrates the potential for forensic analysis.
Article
Optics
Erika Cortese, Joshua Mornhinweg, Rupert Huber, Christoph Lange, Simone De Liberato
Summary: The achievement of large values of light-matter coupling in nanoengineered photonic structures can lead to multiple photonic resonances contributing to the final properties of the same hybrid polariton mode. We develop a general theory describing multi-mode light-matter coupling in systems of reduced dimensionality, and validate our theory's predictions against numerical electromagnetic simulations. Our study characterizes the spectral features and real-space shapes of electromagnetic fields associated with each polariton mode, highlighting the potential for tailored manipulation of subwavelength electromagnetic fields.
Article
Chemistry, Analytical
Tatiana V. Shishkanova, Frantisek Kralik, Alla Synytsya
Summary: The purpose of this study was to understand the discrimination of neuroblastoma diagnostic markers VMA and HVA on a graphite electrode coated with an electrochemically oxidized urea derivative. DFT calculations, FTIR spectroscopic measurements, and electrochemical impedance spectroscopic measurements were used to analyze the interaction of the urea derivative with VMA and HVA. The results showed that the interaction strength between the urea moiety and the analytes depended on their basicity, and both VMA and HVA could be successfully detected as individual species using the differential pulse voltammetric method.
Article
Chemistry, Analytical
Gabriela Broncova, Tatiana V. V. Shishkanova, Pavel Matejka
Summary: A three-layer electrode composed of PTh, PANI, and PNR was developed and characterized for potentiometric sensing of citrates. Raman spectroscopy and scanning electron microscopy confirmed the formation of individual polymeric layers, with the three-layer system showing a more organized structure than the PNR layer alone. The three-layer system exhibited the highest selectivity towards citrates and eliminated unwanted interference from the underlying Pt surface. The potentiometric sensor displayed excellent performance in detecting citrates in real-world samples, comparable to capillary electrophoresis and spectrophotometric methods.
Article
Materials Science, Multidisciplinary
S. Candussio, S. Bernreuter, T. Rockinger, K. Watanabe, T. Taniguchi, J. Eroms, I. A. Dmitriev, D. Weiss, S. D. Ganichev
Summary: This article reports on the observation of circular transversal terahertz photoconductivity in monolayer graphene supplied by a back gate. The photoconductivity response is caused by free carrier absorption and reverses its sign when the radiation helicity is switched. Additionally, the observation of a dc Hall effect suggests the breaking of time inversion symmetry induced by circularly polarized terahertz radiation in the absence of a magnetic field.
