Article
Chemistry, Analytical
Jin-Chen Hsu, Chih-Yu Chang
Summary: In this study, acoustic aggregation and separation of microparticles in fluid channels driven by standing Lamb waves were achieved. The counter-propagating lowest-order antisymmetric and symmetric Lamb modes were excited on a double-side polished lithium-niobate (LiNbO3) plate, generating solid-fluid coupling and resulting in radiative acoustic pressure and streaming fields. Finite-element simulations and experiments confirmed the capability of particle aggregation and separation. Strong streaming dominated particle aggregation, while acoustic radiation force expelled particles of different sizes to achieve continuous separation.
Article
Multidisciplinary Sciences
Shuntaro Amano, Stephen D. P. Fielden, David A. Leigh
Summary: This study introduces an autonomous chemically fueled information ratchet that continuously pumps crown ether macrocycles from bulk solution onto a molecular axle without the need for further intervention. By tuning the dynamics of the processes, the molecular machine is able to move macrocycles from their lowest energy state in the solution to a higher energy state on the axle, maintaining out-of-equilibrium [n]rotaxanes as long as unreacted fuel is present.
Article
Mechanics
Sergey Kuznetsov
Summary: Lamb waves propagating in a layered structure with equal acoustic impedances are studied. The dispersion portraits can distinguish individual layers, even if their acoustic impedances are identical. The developed methodology is adequate for determining geometrical and physical properties of the individual layers with equal acoustic impedances.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Lorna Binks, Chong Tian, Stephan D. P. Fielden, Inigo J. Vitorica-Yrezabal, David A. Leigh
Summary: We report a novel class of synthetic molecular pumps that utilize a stepwise information ratchet mechanism to achieve the kinetic gating required for sequestering macrcyclic substrates. These pumps thread rings onto a thread and enable the loading of different macrocydes in a desired sequence.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Alessandra Milloch, Riccardo Mincigrucci, Flavio Capotondi, Dario De Angelis, Laura Foglia, Gabor Kurdi, Denys Naumenko, Emanuele Pedersoli, Jacopo S. Pelli-Cresi, Alberto Simoncig, Bjorn Wehinger, Claudio Masciovecchio, Filippo Bencivenga
Summary: This study demonstrates high-precision measurement of nanoscale elasticity in thin suspended silicon nitride membranes using extreme ultraviolet ultrashort pulse technology, providing important information on nanoscale thermal transport and behavior compatible with the diffusive regime.
ACS APPLIED NANO MATERIALS
(2021)
Review
Engineering, Electrical & Electronic
Ze Zhao, Hamid Taghavifar, Haiping Du, Yechen Qin, Mingming Dong, Liang Gu
Summary: This article discusses the importance, sources, and mitigation methods of vibration in distributed-driven EVs with IWMs, providing a comprehensive review of motor selection, vibration sources, and reduction methods. Emerging research trends and future improvement aims are also summarized, offering valuable insights for researchers interested in this topic.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2021)
Review
Chemistry, Multidisciplinary
Fengying Qin, Yuhan Zhang, Fei Peng
Summary: Advancements in nanotechnology have led to significant progress in the field of micro/nanoscale motors, with magnetically driven helical motors showing promising potential for future biomedical applications, particularly in targeted drug delivery. Various fabrication methods and design strategies have been explored to enhance the performance and functionality of these motors, aiming to accelerate their clinical translation.
Article
Geosciences, Multidisciplinary
Angel Amores, Sebastian Monserrat, Marta Marcos, Daniel Argueso, Joan Villalonga, Gabriel Jorda, Damia Gomis
Summary: On 15 January 2022, the eruption of the Hunga-Tonga volcano in the South Pacific Ocean resulted in a violent underwater explosion, causing tsunami waves and atmospheric pressure disturbances. Numerical simulation shows an excellent agreement between the simulated wave arrival time and observations.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Physics, Fluids & Plasmas
G. R. Archana, Debashis Barik
Summary: This study numerically investigates the effect of roughness in symmetric periodic potential on the negative mobility of a driven inertial Brownian ratchet. The research shows that the microscopic spatial heterogeneity of the potential can generate negative mobility, which would not otherwise be possible under a smooth potential. The findings highlight the constructive role of roughness in the anomalous transport properties of Brownian ratchet.
Article
Multidisciplinary Sciences
Martin Lott, Philippe Roux, Matthieu Rupin, Daniel Colquitt, Andrea Colombi
Summary: Numerical simulations demonstrate the potential of using a sub-wavelength array of elongated beams as resonators in a multimodal elastic metamaterial to effectively filter and guide Lamb waves. By coupling the longitudinal and flexural motions of these resonators, narrow transmission bands are created within the wide frequency bandgap, with the diameter of the beams acting as a tuning parameter for selecting the flexural leakage frequency without affecting the main bandgap. Additionally, a frequency-based multiplexer waveguide is achieved in a locally resonant metamaterial through the combination of monopolar and dipolar scattering effects associated with the coupled beam and plate system.
SCIENTIFIC REPORTS
(2021)
Article
Automation & Control Systems
Mohammad Khosravi, Varsha N. Behrunani, Piotr Myszkorowski, Roy S. Smith, Alisa Rupenyan, John Lygeros
Summary: In this article, a performance-based autotuning method for cascade control systems is proposed. By using Bayesian optimization to tune the parameters of a linear axis drive motion controller from two control loops simultaneously, the method converges to the global optimum of the cost. Numerical studies and experimental comparisons demonstrate the efficiency, robustness against disturbances, and improved tracking performance of the proposed automated tuning method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Solana Di Pino, Yamila A. Peerez A. Sirkin, Uriel N. Morzan, Veronica M. Sanchez, Ali Hassanali, Damian A. Scherlis
Summary: Nanoconfinement effects on water dissociation and reactivity at interfaces, pores, or aerosols remain controversial. Using ab initio simulations, we demonstrate that water dissociation is conserved intact to unexpectedly small length-scales, down to aggregates of only a dozen molecules or pores of widths below 2 nm. This work provides a fundamental description of water dissociation at different scales with implications on reactivity at the air-liquid interface.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Fluids & Plasmas
Ricardo Chacon, Pedro J. Martinez
Summary: This paper discusses two retrodictions of the theory of ratchet universality, explaining previous experimental results involving directed ratchet transport of cold atoms in dissipative optical lattices and fluxons in uniform annular Josephson junctions. These retrodictions offer optimal control of ratchetlike motion and propose new experimental tests to validate predictions from ratchet universality.
Article
Engineering, Electrical & Electronic
Xu Xu, Xing Ai, Tinghao Liu, Jun Lan, Yifeng Li
Summary: This study investigated the simultaneous localization and evaluation of microcracks in plates using the nonlinear Lamb wave-mixing technique and Lamb transformer network. The finite-element simulation was used to analyze the nonlinear effects induced by the interaction of Lamb waves and microcracks with different characteristics. The stacked spectrum map was introduced to analyze the influence of microcrack location, direction, and length on the received signal's spectrum. The proposed Lamb transformer network, utilizing the stacked spectrum map, achieved a high accuracy rate of 99% in predicting microcracks, demonstrating its effectiveness in identifying the complex connections between the sensor array spectrum and microcracks.
IEEE SENSORS JOURNAL
(2023)
Article
Mechanics
Juan Carlos Pineda Allen, Ching Tai Ng
Summary: This paper presents a delamination damage detection technique based on the nonlinear response of Lamb waves in composite laminates. In the approach, a network of transducers is employed to sequentially scan the structure by actuating and receiving dual guided waves. The damage localization imaging algorithm is proposed to locate and determine the damage location by analyzing the cross-correlation of the signal envelope at combined frequency wave with the excitation pulse envelope at incident waves for each transducer pair.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Shitong Wang, Lijiang Zhao, Yanhao Dong, He Zhu, Yang Yang, Haowei Xu, Baoming Wang, Yakun Yuan, Yang Ren, Xiaojing Huang, Wei Quan, Yutong Li, Yimeng Huang, Charles M. Settens, Qi He, Yongwen Sun, Hua Wang, Zunqiu Xiao, Wenjun Liu, Xianghui Xiao, Riqiang Fu, Qiang Li, Yong S. Chu, Zhongtai Zhang, Qi Liu, Andrew M. Minor, Junying Zhang, Zilong Tang, Ju Li
Summary: Wadsley-Roth oxides (WROs) with pore diameters of 2.5 angstrom < d < 2.8 angstrom allow rapid diffusion of Li+ in single-crystal particles, enabling high-rate charge cycles similar to gasoline vehicles and improving the cycle life up to 10,000 cycles.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Joseph P. Kozak, Qihao Song, Ruizhe Zhang, Yunwei Ma, Jingcun Liu, Qiang Li, Wataru Saito, Yuhao Zhang
Summary: This article presents a comparative study of the parametric shift and recovery of three mainstream GaN HEMTs in repetitive overvoltage switching. The study shows that the devices exhibit shifts in threshold voltage and saturation current during the switching process, and these shifts saturate in a short period of time. The recovery process is dominated by hole detrapping and through-gate removal, with the gate stack playing a significant role. The article also suggests effective methods for poststress recovery.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Editorial Material
Optics
Lei Jin, Cheng-Wei Qiu
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Hongtao Wang, Hao Wang, Qifeng Ruan, John You En Chan, Wang Zhang, Hailong Liu, Soroosh Daqiqeh Rezaei, Jonathan Trisno, Cheng-Wei Qiu, Min Gu, Joel K. W. Yang
Summary: By miniaturizing spiral phase plates and integrating them with structural colour filters, we have successfully generated coloured orbital angular momentum beams using incoherent white light. These beams, which possess both spatial and temporal coherence, can independently generate multiple helical eigenstates and combine colour information into orbital angular momentum beams.
NATURE NANOTECHNOLOGY
(2023)
Article
Optics
Jianghui Liu, Qiang Li, Junbo Liu, Song Hu, Chunchao Qi
Summary: In this work, a structure-illumination based wafer focus measuring system (SI-WFMS) was proposed, which can measure the vertical defocus distance of the exposure area with less than 0.06 μm error in a single-step sampling process. The SI-WFMS can also rapidly measure the surface profile and tilt angle of the wafer, saving measuring time and improving manufacturing efficiency.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
He-Xiu Xu, Guangwei Hu, Xianghong Kong, Yanzhang Shao, Patrice Genevet, Cheng-Wei Qiu
Summary: Electromagnetic wave multiplexing, especially for spatial-frequency multiplexing, is important for ultrathin multifunctional interfaces and high-capacity information processing and communication. However, it is challenging to achieve with passive and compact wave elements due to the exclusive coupling between wave excitation and scattering channels. In this study, a spin-momentum multiplexed paradigm called a super-reflector is proposed, enabling control of both retroreflections and anomalous reflections. By multiplexing four channels connecting two spin states and three spatial frequencies, a total of twelve channels are engineered, with five degrees of freedom in circular polarization Jones' matrix. Experimental verification has been conducted, showcasing twelve reflected beams with high efficiency exceeding 90.6%. This strategy opens up possibilities for angle multiplexing and angle-resolved metadevices.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Editorial Material
Optics
Jiazheng Qin, Mengjia Wang, Cheng-Wei Qiu
Summary: By controlling graphene, it has become easier to access and track exceptional points.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Physical
Jinni Shen, Xu Liu, Yuhua Zhong, Chengwei Qiu, Huihui Xu, Hongsheng He, Haifeng Li, Jianhan Lin, Zizhong Zhang, Xuxu Wang
Summary: Solar light-driven overall water splitting for hydrogen production is an ideal solution to climate warming and energy shortage issues. Obtaining a highly efficient and stable photocatalyst remains a major challenge at present. Herein, NixP/gamma-Ga2O3 nanosheets are found to be a highly active and durable photocatalyst for pure water splitting into H2 and O2 without a sacrificial reagent.
ACS APPLIED ENERGY MATERIALS
(2023)
Editorial Material
Multidisciplinary Sciences
Yucheng Jiang, Yangliu Wu, Jinlei Zhang, Jingxuan Wei, Bo Peng, Cheng-Wei Qiu
Article
Optics
Bing Qin, Yining Zhu, Yiwei Zhou, Min Qiu, Qiang Li
Summary: This paper proposes a multilayer wavelength-selective emitter that achieves effective camouflage across the entire infrared spectrum, and provides a comprehensive guideline for developing multiband camouflage compatible with radiative heat dissipation.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Mengqi Liu, Weijin Chen, Guangwei Hu, Shanhui Fan, Demetrios N. Christodoulides, Changying Zhao, Cheng-Wei Qiu
Summary: Perfect absorbers that can completely absorb all incoming energy have been extensively studied and found to be associated with topological spectral phase singularities (SPS). The order of the topological invariant depends on the number of degenerate outgoing channels. By examining mirror-backed and all-dielectric structures, the generation, evolution, and annihilation of SPSs with different orders are revealed. A strategy based on charge conservation of SPSs has been established to design dual-band perfect absorbers. These findings highlight the topological origin of perfect absorption and its potential applications in biosensing, topological metasurfaces, and micro/nano thermal radiation.
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)
Article
Engineering, Environmental
Cheng-Wei Qiu, Yue Ma, Zi-Feng Gao, Jakkrit Sreesaeng, Shuo Zhang, Wenxing Liu, Imrul Mosaddek Ahmed, Shengguan Cai, Yizhou Wang, Guoping Zhang, Feibo Wu
Summary: This study provides a comprehensive examination of genetic variation in aluminum-tolerant Tibetan wild barley through genome-wide profiling. The identification of key genes related to aluminum tolerance in barley and the strategy of manipulating these genes offer potential for developing more aluminum-tolerant barley cultivars.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
