Article
Nanoscience & Nanotechnology
Wangyang Zhang, Weishan Yan, Haonian Zheng, Chaopeng Zhao, Duo Liu
Summary: This study demonstrates laser-engineered polydimethylsiloxane (PDMS) as a versatile and highly efficient platform for water manipulation. The obtained superhydrophobic PDMS material exhibits excellent stability and can be widely applied in areas such as oil/water separation and water collection.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Kuidong Wang, Minghao Li, Hui-Hsin Hsiao, Fengling Zhang, Marcus Seidel, Ai-Yin Liu, Jie Chen, Eloise Devaux, Cyriaque Genet, Thomas Ebbesen
Summary: The study demonstrates a large, ultrafast anisotropic modulation of light using the anisotropic nonlinear response of indium tin oxide and plasmonic nanoantennas. A polarization elliptic rotation and phase delay between the oscillations of linear polarization axes are achieved, showing promise for implementing all-optical high-speed polarization modulators and retarders.
Article
Optics
Zong Qin, Yuhan Zhang, Bo-Ru Yang
Summary: In an integral imaging near-eye light field display using a microlens array, the interaction between defocusing and number of sampled rays on accommodative response is studied. Analysis of retinal images reveals that when the RDP coincides with the CDP, the accommodative response matches the RDP, but when the RDP deviates from the CDP, defocusing is introduced causing the response to shift towards the CDP.
Article
Crystallography
Minyu Bai, Zhuoman Wang, Jijie Zhao, Shuai Wen, Peiru Zhang, Fei Xie, Huan Liu
Summary: Weak absorption remains a crucial factor limiting the application of 2D materials due to their atomic thickness. This study successfully achieved the encapsulation of 2D MoS2 on a silicon nanopillar array substrate (NPAS) using a direct CVD process, resulting in single-layer 2D MoS2 monocrystal sheets with 80% surface coverage on NPAS. Compared to planar silicon substrates, the 2D MoS2-encapsulated silicon substrate showed significantly reduced reflection and transmittance of incident light within the visible to shortwave infrared range, leading to effective light trapping. The proposed method offers a feasible and low-cost approach for conformal deposition on NPAS, combining the advantages of 2D MoS2 and its substrate for promising high-performance optoelectronic device development.
Article
Optics
Zexu Guo, Yulong Zhou, Huanhuan Yang, Sijia Li, Tong Li, Jianghao Tian, Xiangyu Cao
Summary: In this paper, a dual-band electronically reconfigurable transmitarray (ERTA) is designed and demonstrated with the capability of fully independent beam manipulation in two divided bands. The ERTA construction includes two kinds of orthogonally polarized reconfigurable elements and utilizes polarization isolation and a backed cavity for low coupling. A hierarchical bias method is used to separately control the 1-bit phase in each band.
Article
Nanoscience & Nanotechnology
Geng-Bo Wu, Shu-Yan Zhu, Stella W. Pang, Chi Hou Chan
Summary: This study proposes a waveguide-integrated superheterodyne metasurface architecture capable of converting guided modes into desired free-space modes, enabling complex light manipulation. It combines radio communications and photonics, providing a paradigm shift in metasurface designs and empowering integrated photonic devices with extraordinary free-space interactivity capability.
Article
Physics, Applied
Zhenyu Liu, Ziheng Zhou, Yang Li, Yue Li
Summary: Omnidirectional antennas with electromagnetic wave radiation are widely used in sensing, positioning, and wireless communications. This study investigates the potential of using epsilon-near-zero (ENZ) metamaterial to achieve omnidirectional radiation with high degrees of freedom. By utilizing ENZ behavior, the ENZ antenna can decouple radiation patterns and operating frequency while maintaining omnidirectional radiation characteristics.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Jiayu Zhao, Feifan Zhu, Yongpeng Han, Qining Wang, Li Lao, Xiaofeng Li, Yan Peng, Yiming Zhu
Summary: This study proposes a method of using ubiquitous air as a restorable medium for manipulating light-guiding-light (LGL) signals. By creating plasma filament arrays in the air through femtosecond laser beams, terahertz (THz) pulses can be guided and the all-optical stage can be rapidly reconfigured.
Article
Engineering, Electrical & Electronic
Chandan Kumar, Ajinkya Palwe, Sweta Rani, Sumit Saxena, Shobha Shukla
Summary: This letter presents an inorganic/organic heterojunction photodetector based on a n-type zinc oxide nanorod array (NRA) and a p-type poly3,4-ethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS). The device exhibits high responsivity, detectivity, spectrum selectivity, and fast response under UV light illumination.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Chemistry, Physical
Hira Fatima, Muhammad Rizwan Azhar, Mehdi Khiadani, Yijun Zhong, Wei Wang, Chao Su, Zongping Shao
Summary: The development of a near-infrared-responsive photocatalyst Fe3O4@PB@ZnO has successfully addressed the challenge of low-wavelength photon absorption in ZnO-based photocatalysis for wastewater treatment. The enhanced photocatalytic rate of Fe3O4@PB@ZnO is attributed to the presence of PB with low bandgap, which results in sufficient production of reactive oxygen species.
MATERIALS TODAY ENERGY
(2022)
Article
Optics
Javad Shabanpour, Morteza Sedaghat, Vahid Nayyeri, Homayoon Oraizi, Omar M. Ramahi
Summary: A new generation of reprogrammable multi-functional bias encoded metasurfaces for dynamic wave manipulation using liquid crystals was proposed, enabling the realization of multifunctional optical wavefront manipulation and future intelligent optical devices through various examples demonstrating its versatility.
Article
Optics
Xuanchao Ye, Fengchao Ni, Honggen Li, Haigang Liu, Yuanlin Zheng, Xianfeng Chen
Summary: High-speed spatial modulation of light is essential for various applications, and a one-dimensional programmable spatial light modulator based on lithium niobate thin film is demonstrated in this study, showing low driving voltage and high-speed modulation capabilities that can be used in optical communications and image transmission.
Article
Chemistry, Analytical
Songwei Lv, Dong Zheng, Zhaoxian Chen, Bin Jia, Peng Zhang, Jiaxuan Yan, Xiubo Zhao, Wanlan Jiang, Jing-Juan Xu
Summary: This study designed a near-infrared light-responsive microfluidic chip for biocompatible single-cell manipulation and study of CTC heterogeneity. The chip combined immunomagnetic labeling and a gradient magnetic field to distribute CTCs in different regions. The lateral flow microarray chip achieved high capture efficiency and purity, and the captured single CTC cell can be released individually by near-infrared at a specific point.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Marine
Dezhi Ning, Jin Xu, Lifen Chen, Peiwen Cong, Ming Zhao, Changbo Jiang
Summary: This paper investigates the interaction between complex waves and a four-cylinder array and establishes a Boussinesq model to simulate wave phenomena. Through experiments and flowline observations, it is found that the spacing between the cylinders affects the wave period for near-trapping, and the waves inside the cylinder array are reflected back and forth among neighboring cylinder pairs. The trapped energy inside the array slowly decays and leads to high free surface elevations during near-trapping periods. To avoid/minimize this phenomenon, breaking the geometry symmetry and reflection modes are suggested.
Article
Chemistry, Multidisciplinary
Wen-Qi Ye, Wen-Xin Fu, Xiao-Peng Liu, Chun-Guang Yang, Zhang-Run Xu
Summary: A shape-reconfigurable micropillar array chip is reported for the manipulation of water droplets, oil droplets, and water-in-oil droplets. The chip effectively solves the problem of droplet evaporation and allows for precise control of droplet movement.
CHINESE CHEMICAL LETTERS
(2024)
Article
Optics
Mel F. Hainey, Takaaki Mano, Takeshi Kasaya, Yoji Jimba, Hiroshi Miyazaki, Tetsuyuki Ochiai, Hirotaka Osato, Kazuhiro Watanabe, Yoshimasa Sugimoto, Takuya Kawazu, Yukinaga Arai, Akitsu Shigetou, Hideki T. Miyazaki
Summary: The research integrates a quantum well infrared photodetector (QWIP) with a metasurface made of a patchwork of square cavities with different dimensions arranged in a subwavelength unit cell. This design scheme enables wideband photoresponse and high external quantum efficiencies, with the detectors selectively responding to specific wavefront incidence.
Article
Physics, Applied
Masaya Morita, Keiji Ishibashi, Kenichiro Takahashi, Shigenori Ueda, Jun Chen, Kota Tatejima, Toyohiro Chikyow, Atsushi Ogura, Takahiro Nagata
Summary: The effects of reactive gas flow conditions on the growth of nonpolar AlN films were investigated. It was found that low-temperature growth prevents unintentional nitridation and results in the crystallization of nonpolar AlN. Additionally, an appropriate N-2 flow improves the crystallinity and reduces defects, suppressing reactions at the interface.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Alexandra Papadogianni, Takahiro Nagata, Oliver Bierwagen
Summary: The alloying of In2O3 and Ga2O3 can modulate the properties of the parent compounds, such as the character of oxygen vacancies and the presence of a surface electron accumulation layer. The addition of Ga increases the electron density due to native defects, possibly caused by Ga-related unit-cell distortions. X-ray photoelectron spectroscopy measurements confirm the existence of a surface electron accumulation layer in all alloy films, and Hall and Seebeck measurements show negligible contribution of the surface electron accumulation layer to electron transport.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Han Zhang, Yu Jimbo, Akira Niwata, Akihiro Ikeda, Akira Yasuhara, Cretu Ovidiu, Koji Kimoto, Takeshi Kasaya, Hideki T. Miyazaki, Naohito Tsujii, Hongxin Wang, Yasushi Yamauchi, Daisuke Fujita, Shin-ichi Kitamura, Hironobu Manabe
Summary: The study developed a LaB6 nanowire-based electron source that emitted a highly collimated electron beam with good lateral and angular alignment. The electron source demonstrated excellent performance in achieving atomic resolution in both broad-beam and probe-forming modes.
NATURE NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Alexandra Papadogianni, Charlotte Wouters, Robert Schewski, Johannes Feldl, Jonas Lahnemann, Takahiro Nagata, Elias Kluth, Martin Feneberg, Rudiger Goldhahn, Manfred Ramsteiner, Martin Albrecht, Oliver Bierwagen
Summary: In this study, single-crystalline bixbyite (In1-xGax)(2)O-3 films were grown on (111)-oriented yttria-stabilized zirconia substrates using plasma-assisted molecular beam epitaxy. The addition of a pure In2O3 buffer layer between the substrate and (In1-xGax)(2)O-3 alloy improved the film surface smoothness and crystallinity. The distribution of Ga cations in the films was found to be non-uniform, with high Ga density inclusions observed at higher Ga content. The cubic bixbyite phase was preserved in both the matrix and the inclusions.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Physical
Ibrahima Gueye, Riku Kobayashi, Shigenori Ueda, Toshihide Nabatame, Kazuhito Tsukagoshi, Atsushi Ogura, Takahiro Nagata
Summary: The authors used operando-HAXPES with synchrotron radiation source to investigate the Au/InO1.16C0.04/Al2O3/p(+)-Si structure under bias voltage. They found that the InO1.16C0.04 layer removes oxygen from the Al2O3 layer and creates an oxygen depletion region in the Al2O3 film. The redox process mainly occurs near the Au/InO1.16C0.04 top interface.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Takahiro Nagata, Yuya Suemoto, Yoshihiro Ueoka, Masami Mesuda, Liwen Sang, Toyohiro Chikyow
Summary: The ability to control the polarity of an all-sputtered epitaxial GaN/AlN/Al film on a Si(111) substrate via intermediate oxidization was investigated. The results showed that by intentionally oxidizing the AlN layer, the polarity of the GaN surface can be changed from N-terminated to Ga-terminated. However, this intentional oxidation process may degrade the crystallinity of the GaN/AlN layer, which can be recovered through adjusting the oxidation point and repeating the growth process.
Article
Chemistry, Multidisciplinary
Janos Volk, Janos Rado, Zsofia Baji, Robert Erdelyi
Summary: Accurate mechanical characterization of nanowires is crucial for their applications in nanoelectromechanical systems. This study presents an orientation-controlled bending and fracture study on wet chemically grown ZnO nanowires, revealing their mechanical properties and the factors affecting their fracture behavior.
Article
Nanoscience & Nanotechnology
Takaaki Mano, Akihiro Ohtake, Takuya Kawazu, Hideki T. Miyazaki, Yoshiki Sakuma
Summary: We demonstrate an extended short-wave infrared (e-SWIR) photodetector with interface misfit dislocations in an InAs/GaAs(111)A heterostructure. The photodetector consists of an n-InAs absorption layer directly grown on n-GaAs with a thin undoped-GaAs spacer layer. The formation of a misfit dislocation network in the InAs growth stage helps relax the lattice mismatch and suppress dark current, leading to efficient e-SWIR detection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Multidisciplinary Sciences
Masakazu Morioka, Yoshihiro Takamura, Hideki T. Miyazaki, Makoto Gozawa, Yutaka Yamada, Ryohei Komori, Kengo Tanaka, Masaru Inatani
Summary: The COVID-19 pandemic has led to increased facemask use, which can potentially disperse bacteria into the eyes and increase the occurrence of postoperative endophthalmitis. Gaps between the surgical drape and skin can also direct exhaled airflow towards the eyes. The study found that when the nasal side of the drape was detached from the skin, there was increased airflow around the eyes and a significant increase in the number of particles, but using a metal rod to create space above the body reduced airflow and particles.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Laszlo Posa, Peter Hornung, Timea Nora Torok, Sebastian Werner Schmid, Sadaf Arjmandabasi, Gyoergy Molnar, Zsoofia Baji, Goran Drazic, Andras Halbritter, Janos Volk
Summary: This study investigates the interplay between nanoscale thermal and nonlinear electronic phenomena in VO2 devices, which have temperature and voltage dependent conduction properties. It is found that purely thermal or electronic effects alone cannot fully explain the device operation, but a combined electronic and thermal model provides an accurate description. These findings facilitate the understanding and design of novel VO2-based neuronal devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Zsofia Baji, Laszlo Posa, Gyorgy Molnar, Zoltan Szabo, Matyas Volom, Angelja Kjara Surca, Goran Drazic, Janos Volk
Summary: The study investigates the atomic layer deposition (ALD) of VO2 layers for resistive switching applications. Different oxidants, deposition temperatures, and annealing procedures were used with Tetrakis (ethylmethylamino)vanadium (TEMAV) precursor, and the structural and electrical properties of the layers were analyzed. All as-deposited layers were amorphous, but annealing in an oxygen-containing atmosphere at temperatures above 400 degrees C yielded pure and crystalline VO2 layers. The prepared films are compact with crystallite sizes ranging from 50 to 100 nm, exhibiting excellent electrical switching properties, with a 3 orders of magnitude decrease in resistivity at 68 degrees C.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Jingmin Tang, Soichiro Takeuchi, Masaki Tanaka, Hiroto Tomita, Yusuke Hashimoto, Takahiro Nagata, Jun Chen, Takuo Ohkochi, Yoshinori Kotani, Tomohiro Matsushita, Yoshiyuki Yamashita
Summary: In this study, we used PES and PEH techniques to investigate the atomic structures and chemical states in the active and inactive dopant states of Mg-doped GaN. The results revealed the presence of two chemical states, with the active state being attributed to Mg atoms replacing Ga atoms in the GaN structure, and the inactive state potentially being a disordered structure or defects.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Tamas Dozsa, Janos Rado, Janos Volk, Adam Kisari, Alexandros Soumelidis, Peter Kovacs
Summary: In this article, a measurement system for intelligent tires equipped with a 3-D piezoresistive force sensor is developed. The system extracts relevant features using adaptive Hermite functions and evaluates its performance in abnormal road surface detection. Experimental results show a mean accuracy of over 97%.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Computer Science, Interdisciplinary Applications
Minh-Quyet Ha, Duong-Nguyen Nguyen, Viet-Cuong Nguyen, Takahiro Nagata, Toyohiro Chikyow, Hiori Kino, Takashi Miyake, Thierry Denoeux, Van-Nam Huynh, Hieu-Chi Dam
Summary: A new evidence-based material recommender system (ERS) was developed using Dempster-Shafer theory, which outperformed matrix-factorization- and supervised-learning-based systems in recommending high-entropy alloys (HEAs) without using material descriptors. The ERS showed strong recommendation and extrapolation capabilities for quaternary and quinary HEAs, with experimental validation confirming the structure of the most strongly recommended Fe-Co-based magnetic HEA.
NATURE COMPUTATIONAL SCIENCE
(2021)
