Article
Engineering, Electrical & Electronic
Yalcin Ata, Hanaa Abumarshoud, Lina Bariah, Sami Muhaidat, Muhammad Ali Imran
Summary: Intelligent reflecting surfaces (IRS) offer significant enhancement in the reliability of underwater optical wireless communication (OWC) systems under attenuation, beam displacement, and turbulence effects. The combination of a large number of reflecting surfaces and a larger aperture diameter yields a more noticeable improvement. This study quantifies the performance enhancement offered by the integration of IRS technology in the context of underwater OWC, considering factors such as underwater attenuation, pointing error, and turbulence effects.
IEEE PHOTONICS JOURNAL
(2023)
Article
Optics
S. Koutsares, L. S. Petrosyan, S. Prayakarao, D. Courtwright, C. E. Bonner, T. Shahbazyan, M. A. Noginov
Summary: We explored emission kinetics of dye-doped polymeric films on glass and silver, finding concentration quenching near the metallic surface. Theoretical models were used to explain the observed phenomena in Fabry-Perot cavities.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Metallurgy & Metallurgical Engineering
Ming Jiang, Zhan Cheng, Dan Zhao, Lei Zhang, Dong Xu
Summary: In this study, Mg-doped CCTO thin films were prepared by a modified sol-gel method, and a comparative study on their microstructure and electrical properties was carried out. The results showed that Mg doping could reduce the grain size of CCTO films and improve the dielectric constant and frequency stability.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Multidisciplinary
Vlad V. V. Travkin, Danila A. A. Semikov, Pavel A. A. Stuzhin, Ivan A. A. Skvortsov, Georgy L. L. Pakhomov
Summary: Stable subphthalocyanine-type dyes are being considered as potential substitutes for traditional fullerenes in molecular electronics devices due to their high electron affinity. Replacing the peripheral benzene fragments with 1,2,5-thiadiazole fragments can enhance the acceptor properties of the subphthalocyanine core. However, their resistance to light or atmospheric effects remains a challenge, limiting their application in device manufacturing.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
P. C. Haripadmam, T. H. Thanuja, G. S. Varsha, C. D. Beryl, Alexander Aji
Summary: This study investigates the linear and nonlinear optical properties of polyvinyl alcohol films doped with natural dye from Caladium redflash leaves. The films show excellent optical limiting efficiency due to strong reverse saturable absorption, making them potential candidates for device applications. These green, durable and cost-effective films can serve as economical substitutes for costly transparent optical coatings made using synthetic dyes.
Article
Chemistry, Physical
Haoran Yuan, Yuping Wang, Bing Suo, Shen Zhang, Hongwei Dong, Feng Yan, Chunling Zhu, Yujin Chen
Summary: In this study, nitrogen-doped graphene-coated FeNi nanoparticles were prepared on N-doped carbon nanosheets, and simulations were used to analyze the dielectric and magnetic properties of different samples. The results showed that Ni@NGLs/NC had the highest dielectric loss, but exhibited the worst electromagnetic wave absorption properties among the samples. These findings highlight the importance of balancing loss and impedance matching for an EMW absorber.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Computer Science, Information Systems
Shih-Kai Chou, Okan Yurduseven, Hien Quoc Ngo, Michail Matthaiou
Summary: The concept of intelligent reflecting surfaces (IRS) has gained significant attention for manipulating electromagnetic signals and offering anomalous reflections. This work addresses the missing piece of prior research by providing practical guidelines for selecting the aperture size of the reflecting surface and revisiting the pathloss expression based on a realistic physical model.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Materials Science, Ceramics
Ghulam Muhiuddin, Ismat Bibi, Zarish Nazeer, Farzana Majid, Shagufta Kamal, Abida Kausar, Qasim Raza, Norah Alwadai, Safa Ezzine, Munawar Iqbal
Summary: The pristine and Ni-doped BaNixFe12-xO19 nanoparticles were fabricated via a microemulsion approach, and the impact of dopants on the dielectric, optical, structural, and photocatalytic properties was investigated. The doped nanoparticles exhibited enhanced remanence, saturation polarization, and photocatalytic degradation activity. The optical band gap was reduced due to the doping, and the dielectric properties were also improved. The highly doped catalyst demonstrated efficient electron-hole pair separation and achieved a higher degradation rate of crystal violet dye under visible light irradiation.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Maria Cristina Larciprete, Daniele Ceneda, Daniele Scire, Mauro Mosca, Dominique Persano Adorno, Sina Abedini Dereshgi, Roberto Macaluso, Roberto Li Voti, Concita Sibilia, Tiziana Cesca, Giovanni Mattei, Koray Aydin, Marco Centini
Summary: The tunability of vanadium dioxide's complex dielectric constants makes it a promising phase-change material for active and dynamic photonics applications. By doping vanadium dioxide with tungsten, the transition temperature of the material can be reduced to room temperature, allowing for further tunability. In this study, we investigated tungsten-doped vanadium dioxide thin films and achieved perfect absorption at different temperatures, demonstrating the potential for thermo-optical devices.
Article
Nanoscience & Nanotechnology
Xiang Xu, Jiannan Cheng, Haitao Zhao, Weiwei He, Lifen Zhang, Zhenping Cheng
Summary: In this work, a series of near-infrared light (NIR)-responsive vitrimers are synthesized using carboxyl-bearing croconaine dye (CR-800) as a photothermal agent. NIR-responsive liquid crystalline elastomers (CR-vitrimer-LCEs) are further prepared under NIR laser without a template. The dynamic covalent bonding properties of vitrimer allow for the fabrication of a hand-shaped actuator with fingers of different NIR-response threshold values, which successfully achieve local and sequential control under a uniform NIR light field.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Xiang Xu, Jiannan Cheng, Haitao Zhao, Weiwei He, Lifen Zhang, Zhenping Cheng
Summary: In this study, a hand-shaped actuator is developed by synthesizing near-infrared sensitive CR-vitrimers, which achieves local and sequential control under a uniform near-infrared light field.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Sekhar Didde, Raghvendra Sarvjeet Dubey, Sampad Kumar Panda, Gandla Satheesh Babu
Summary: This article explores the feasibility and performance of Ca-doped ZnAl(2)O(4) ceramic nanoparticles prepared by sol-gel method in the fabrication of microstrip patch antennas (MPAs). The experimental results show that Ca-doped ZnAl(2)O(4) ceramic nanoparticles possess exceptional dielectric characteristics, making them suitable for microwave applications.
Article
Physics, Condensed Matter
Adnan Rasheed, Ismat Bibi, Farzana Majid, Shagufta Kamal, Babar Taj, M. A. S. Raza, Naba Khaliq, Khadijah M. Katubi, Safa Ezzine, Norah Alwadai, Munawar Iqbal
Summary: A series of SrMnxFe12-xO19 NPs were synthesized via microemulsion method, and the effects of Mn substitution on the structural, optical, ferroelectric, dielectric, and photocatalytic properties were evaluated. The results showed that doping significantly enhanced the optical properties of SrMnxFe12-xO19, making it a promising material for photocatalytic applications including dye remediation.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Cell Biology
Her-Hsiung Huang, Zhi-Hwa Chen, Diem Thuy Nguyen, Chuan-Ming Tseng, Chiang-Sang Chen, Jean-Heng Chang
Summary: This study examined the effects of different crystal structures of TiO2 on blood coagulation properties. The presence of rutile structures was found to be associated with a higher dielectric constant, leading to increased blood clotting, fibrin network formation, and platelet adhesion.
Article
Multidisciplinary Sciences
Haiyang Zhan, Zichao Yuan, Yu Li, Liang Zhang, Hui Liang, Yuhui Zhao, Zhiguo Wang, Lei Zhao, Shile Feng, Yahua Liu
Summary: Using a photopyroelectric slippery surface (PESS), bubble splitting, merging, and detachment can be achieved with high flexibility and precision. This method also extends bubble control capabilities to microrobots and transmission of gear structures. It provides a valuable platform for various bubble-involved processes.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Jiao Geng, Liye Xu, Wei Yan, Liping Shi, Min Qiu
Summary: The authors demonstrate a solution for producing structural colors using ultrafast lasers on thin hybrid films. By controlling the absorption behavior of the oxide films, angle-robust structural colors with wide gamut and high resolution are achieved. This technique is competitive for industrial applications.
NATURE COMMUNICATIONS
(2023)
Correction
Optics
Meiyan Pan, Yifei Fu, Mengjie Zheng, Hao Chen, Yujia Zang, Huigao Duan, Qiang Li, Min Qiu, Yueqiang Hu
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Yihan Lu, Binbin Jin, Rui Zheng, Shan Wu, Ding Zhao, Min Qiu
Summary: In this study, it was discovered that aromatic molecules can be directly converted into nanostructures containing graphene quantum dots (GQDs) using cryogenic electron-beam writing, resulting in even red fluorescence emission. The photoluminescence intensity of the product can be easily controlled by adjusting the electron-beam exposure dose. Experimental analysis revealed a carbonization and graphitization process of the aromatic molecules during e-beam irradiation. This one-step method for production and patterning of GQDs enables their application in highly integrated and compact optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Conghui Qiu, Hao Zhang, Chengcai Tian, Xuan Jin, Qianglin Song, Liye Xu, Mohsin Ijaz, Richard J. Blaikie, Qingyu Xu
Summary: We report a CsPbBr3-based photodetector engineered from a multilayer Si/Ag islands/CsPbBr3/PMMA system, showing an evidently enhanced photosensitization and breaking the absorption edge of CsPbBr3. The photocurrent contribution from plasmonic hot-electron injection effectively extends the detection limit of the photodetectors, while surface plasmons on nanoscale silver islands improve the light harvesting ability of CsPbBr3 layer. In accordance with their current-voltage (I-V) characteristics, the photodetector with Si/Ag islands/CsPbBr3/PMMA structure exhibits a higher light intensity distribution inside the CsPbBr3 layer than the photodetector with only Ag islands. Ultimately, the plasmonic CsPbBr3-based photodetector presents a >10-fold increase in the photocurrent and a doubling of the operating lifetime.
APPLIED PHYSICS LETTERS
(2023)
Article
Thermodynamics
Limin Qi, Dongli Liu, Xiao Liu, Haiyue Pei, Ding Zhao, Haishan Cao, Min Qiu
Summary: Thermal management is crucial for electronic devices to remain within their temperature limits. Micromachined Joule-Thomson (JT) coolers, which reduce temperature fluctuations, show promise for achieving this. In this study, the cooling power of a micromachined JT cooler was examined using nitrogen. By applying high and low pressures, the cooler successfully cooled from room temperature to 88.5 K in 30 minutes. The study introduces a general method for evaluating the cooling performance and discusses the relationship between performance and heat load.
APPLIED THERMAL ENGINEERING
(2023)
Article
Mechanics
Kirill Misiiuk, Richard Blaikie, Andrew Sommers, Sam Lowrey
Summary: Passive gradient motion in nature has been studied in the context of heat exchange and green energy technologies. This work presents a method for examining variable-pitch micro/nanoengineered hierarchical superhydrophobic gradients, which can potentially enhance heat exchanger performance and delay icing on wind turbines. The method combines experimental, numerical, and force analysis approaches and has been validated against numerical calculations.
Article
Chemistry, Multidisciplinary
Jianbo Yu, Rui Qin, Yunbin Ying, Min Qiu, Qiang Li
Summary: This study presents a general strategy for achieving asymmetric directional thermal emission in reciprocal systems, and demonstrates its effectiveness experimentally. This has significant implications for the development of ultrathin customized thermal sources and other thermal-engineering applications.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Mohsin Ijaz, Hao Zhang, Sanutep V. Chan, Robert Holt, Nathaniel J. L. K. Davis, Richard J. Blaikie
Summary: In this work, a plasmonic resonator was coupled with semiconductor quantum dots (QDs) to enhance photoelectrocatalytic water splitting for hydrogen (H-2) production. The plasmonic enhancement in the absorption/emission of QDs was observed using optical spectroscopy. The resonant excitation of QDs has been plasmonically enhanced, contributing to enhanced photoelectrocatalysis. These findings lay the foundation for efficient solar-to-H-2 conversion.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Mohsin Ijaz, Hao Zhang, Liye Xu, Richard J. Blaikie
Summary: In this study, plasmonic resonances on large-area nanoscale silver (Ag) gratings are experimentally investigated using angle-resolved optical absorption spectroscopy and femtosecond transient absorption spectroscopy (TAS). The experimental results measure the plasmon resonances as a function of azimuthal angles and detection angles under different polarizations. TAS reveals the non-radiative decay of plasmon resonances by transferring energy to nearby species, and numerical simulation quantifies the density of plasmonic hot electrons excited in the Ag-gratings.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Xinggang Shang, Ning Wang, Nanjia Zhou, Min Qiu
Summary: Structural integrity and robustness are key parameters to evaluate microfabrication techniques. Bending and collapsing of 2D/3D microstructures are commonly noted in solvent-involved procedures. Current literature focuses on mechanical one-axis models, but there is an emerging demand for dual-axis models to satisfy rapidly developed micro/nano-engineerings. This paper proposes a dual-axis beam-sway model that considers structure arrangement and solvent influences, and identifies a simplified criterion for judging structural stability. Experimental data verifies the reliability of the model and highlights its importance for the fabrication of delicate structures and optimization of microfabrication processes.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Yining Zhu, Wenjuan Wang, Yiwei Zhou, Rui Qin, Bing Qin, Tianze Zhou, Min Qiu, Qiang Li
Summary: Personal thermal management is a topic of growing interest due to climate anomalies and the focus on physical health. A colored textile based on woven cloth is developed, which has superior passive radiative heating capability while maintaining aesthetics. By coating infrared transparent inorganic nanoparticles on MXene-decorated cotton, the textile achieves desired color, high near-infrared absorptivity, low mid-infrared emissivity, and wearability. Thermal tests demonstrate significant temperature increases compared to pure cottons, making this textile suitable for energy conservation and multi-spectral camouflage.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Liye Xu, Jiao Geng, Liping Shi, Weicheng Cui, Min Qiu
Summary: We report self-organized periodic nanostructures on amorphous silicon thin films induced by femtosecond laser oxidation. We investigate the dependence of structural periodicity on the thickness of silicon films and the substrate materials. The results show that the period of self-organized nanostructures is close to the laser wavelength and independent of substrates when the silicon film is 200 nm. However, for a 50 nm thick silicon film, the period of nanostructures is much shorter than the laser wavelength and dependent on the substrates. Furthermore, we demonstrate that the formation of periodic nanostructures is dominated by quasi-cylindrical waves in thick silicon films and by slab waveguide modes in thin silicon films, which is supported by numerical simulations.
FRONTIERS OF OPTOELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Xinggang Shang, Ning Wang, Simin Cao, Hehao Chen, Dixia Fan, Nanjia Zhou, Min Qiu
Summary: This study presents the development of a new type of fiber-integrated force sensor using spring-composed Fabry-Perot cavities. The sensor achieves high sensitivity and resolution in force measurements and can be applied in various fields such as fluid mechanics, micro manipulations, and biological sensing.
ADVANCED MATERIALS
(2023)
Article
Optics
Yining Zhu, Yiwei Zhou, Bing Qin, Rui Qin, Min Qiu, Qiang Li
Summary: A nanophotonic-based night-time warming strategy is proposed, which passively inhibits thermal radiation of objects while actively harnessing that of atmosphere. By using a photonic-engineered thin film, it achieves significant temperature rise and low heat loss.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Shi Liping, Geng Jiao, Qiu Min
Summary: This study investigates the formation mechanisms of Laser-Induced Periodic Surface Structures (LIPSS) on metal/silicon films and reveals the influence of scanning direction with respect to laser polarization on the regularity of LIPSS. By optimizing the scanning strategy, high-quality and reproducible periodic nanostructures can be obtained. These findings are significant for addressing the challenges of LIPSS formation and promoting the applications of nanophotonics.
ACTA PHOTONICA SINICA
(2023)
