Article
Computer Science, Hardware & Architecture
Ruoxuan Gao, Yihao Zhang, Xiaomin Liu, Minggang Chen, Fangchao Li, Xiang Li, Lilin Yi, Weisheng Hu, Qunbi Zhuge
Summary: This paper proposes a heuristic-based optimization framework for designing long-haul data center interconnect networks. By adjusting site types and providing three reference strategies, the proposed framework achieves optimization of transmission quality and cost saving. Simulation results on the Tencent DCI network show that the schemes designed using this framework can achieve overall cost savings of up to 25.73%.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2022)
Article
Chemistry, Multidisciplinary
Jiahui Huang, Peiyi Wu
Summary: In this study, a versatile method involving kneading and resting is employed to prepare biomimetic skins with customizable features. Through hand kneading, nanofillers and solvents are dispersed in viscoelastic hydrogel matrices, resulting in improved mechanical properties and new functionalities.
Article
Chemistry, Multidisciplinary
Tianze Zhang, Xin-Yue Lou, Xiaoyan Li, Xi Tu, Jie Han, Bin Zhao, Ying-Wei Yang
Summary: A series of spirooxazine derivatives (SO1-SO4) with bulky aromatic substituents have been designed and synthesized. They exhibit tunable solid photochromism without ground colors, excellent fatigue resistance, and high thermal stability. The ideal photochromic properties of these spirooxazines open a new avenue for their applications in UV printing, quick response code, and related fields.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Aayush Bhat, Sejal Budholiya, Sakthivel Aravind Raj, Mohamed Thariq Hameed Sultan, David Hui, Ain Umaira Md Shah, Syafiqah Nur Azrie Safri
Summary: Advanced materials, including nanocomposites, are extensively used in the aerospace industry for their superior mechanical properties compared to regular composites, but there is a research gap in identifying future application scope.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Polymer Science
Jingyu Huang, Aaron Hall, Ivan Jayapurna, Samana Algharbi, Valeriy Ginzburg, Ting Xu
Summary: The study investigated the impact of polymer chain architecture on the assembly of nanoparticles (NPs) in polymer matrices using synthesized block copolymers (BCPs) with a coil polystyrene (PS) block and a comb random copolymer (RCP) block. Different morphologies of BCPs were obtained by varying the volume fractions of the RCP block, showing asymmetrical phase behavior with the addition of NPs. Self-consistent field theory-density functional theory simulations helped to qualitatively describe the observed morphologies and phase transitions in the nanocomposites.
Article
Geography, Physical
Zaiyang Ma, Min Chen, Zhong Zheng, Songshan Yue, Zhiyi Zhu, Beichen Zhang, Jin Wang, Fengyuan Zhang, Yongning Wen, Guonian Lu
Summary: Collaborative geographic analysis requires complex interactions, and a process expression can help coordinate and guide these interactions. However, current studies mainly focus on the structure of the process, neglecting the content. This article proposes a customizable process expression model that considers both structure and content, and provides methods for customization and implementation, demonstrating improved geographic analysis through a case study.
GISCIENCE & REMOTE SENSING
(2022)
Article
Engineering, Environmental
Jiancang Chen, Guangchun Xiao, Gaigai Duan, Yongzhong Wu, Xiujian Zhao, Xiao Gong
Summary: The combination of CDs with porous materials shows great potential in overcoming the limitations of individual CDs and producing new functionalities, leading to a wide range of applications across different fields. Various studies have focused on the CDs/porous materials composites, highlighting their excellent performance and potential for future developments.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Manufacturing
Tianjiao Wang, Jun Zhao, Chuanxin Weng, Tong Wang, Yayun Liu, Zhipeng Han, Zhong Zhang
Summary: A bidirectionally reversible light-responsive shape memory polyurethane (SMPU) bilayer was proposed, consisting of SMPU-Azoa and SMPU-CB layers, which can realize reversible deformation under ultraviolet and infrared lights. The filler content and thickness ratio of the bilayer were found to significantly affect the reversible bending angle of the SMPU bilayer, with a maximum angle exceeding 30° when Azoa and CB contents are 5wt% and 0.5wt%, respectively.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Electrical & Electronic
Arnaldo Leal-Junior, Leandro Macedo, Anselmo Frizera, Maria Jose Pontes
Summary: This letter presents the development and application of a multimaterial polymer optical fiber (POF) for temperature and force sensing. The POF is fabricated using polymethyl methacrylate (PMMA) and a biodegradable material, polycaprolactone (PCL), with high customizability. Experimental analysis demonstrates the advantages of this POF in temperature and force sensing applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Qian Wang, Luqing Cao, Yuyin Wang, Mingqi Qin, Qianqian Wang
Summary: The ZnO/Fe2O3 nanocomposite prepared by direct precipitation method exhibits both UV and blue light protection advantages. The material is suitable for use in sunscreen products and has a natural reddish hue.
Article
Chemistry, Physical
Mayifei Rong, Xiaoguang Xu, Kai Wang, Liying Lu, Yihua Bai, Yuping Tian, Zhaopeng Hou, Ruitao Zhao, Yingli Ma, Yong Jiang
Summary: A novel hollow porous microsphere composed of hydroxyapatite (HAp) with uniformly embedded Fe3O4 nanoparticles was developed. The microsphere had a specific surface area of 98.6 m2/g and an average pore size of 11.4 nm. It demonstrated high-efficiency absorption of copper ions. Due to the superparamagnetic property of Fe3O4 nanoparticles, the microspheres could be easily dispersed in water and separated by magnetic force. Therefore, the HAp-Fe3O4 hollow microsphere showed great potential in copper ion treatment.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Mathematics
Yuexiang Ruan
Summary: The intercommunication and translation of global languages have become crucial for friendly communication among people worldwide. This study improved machine translation using deep learning networks and focused on solving the out-of-vocabulary problem and incomplete translation. Experimental results showed that the proposed methods effectively addressed these issues and improved translation accuracy.
JOURNAL OF MATHEMATICS
(2022)
Article
Materials Science, Multidisciplinary
Junwei Wang, Jinyao Li, Yang Guo, Wei Tian, Yifan Liu, Baoshan Wu, Longjiang Deng, Nasir Mahmood, Xian Jian
Summary: Polymer-based nanocomposites play a crucial role in advancing microwave absorption and electromagnetic interference shielding technology. These materials inject new vitality into advanced absorbers through their abundant interfaces. Key advantages of this system include adjustable electrical conductivity, controllable complex permittivity, environmental stability, anti-corrosion properties, lightweight, and facile synthesis process. It is important to identify suitable materials and understand the types of interactions among different components to achieve strong microwave absorption and guide future trends.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Sarita Gond, Pranjalee Yadav, Vinod P. Singh
Summary: A sensing material with 2,4-dinitrophenyl hydrazine attachment was synthesized and characterized. The chemosensor exhibited selective colorimetric sensing for F- ions, which was thoroughly investigated using UV-Vis, NMR, and DFT analysis. The limit of detection and association constant were found to be 1.37 μM and 3.09 x 107 M-1, respectively. The chemosensor underwent color change from yellow to pink due to hydrogen bonding induced deprotonation caused by the high electronegativity of F-. The paper strip kit of the chemosensor was successfully applied for sensing F- ions.
Article
Multidisciplinary Sciences
Yu-Ting He, Qian Fu, Yuan Pang, Qing Li, Jun Li, Xun Zhu, Ren-Hao Lu, Wei Sun, Qiang Liao, Uwe Schroeder
Summary: The proposed strategy integrates 3D printing technology and functionalized modular electrode materials to improve electrode performance and achieve high volumetric current density. A custom graphene-based electrode with hierarchical pores and functionalized components was fabricated, demonstrating the highest volumetric current density with pure Geobacter sulfurreducens to date.
Article
Chemistry, Multidisciplinary
Nabarun Polley, Samim Sardar, Peter Werner, Ingo Gersonde, Yuya Kanehira, Ilko Bald, Daniel Repp, Thomas Pertsch, Claudia Pacholski
Summary: In this research, optical fibers equipped with plasmonic flow sensors were fabricated as photothermomechanical nanopumps for active transport of target analytes. The nanopumps were prepared by stacking a thermoresponsive polymer monolayer and a plasmonic nanohole array on an optical fiber tip. The pump mechanism relied on the temperature-dependent collapse and swelling of the polymer, while the required heat was generated by the photo thermal effect in the plasmonic nanohole array. Simultaneous detection of analytes was achieved by monitoring changes in the plasmonic sensor's optical response. The active mass transport through the nanohole array was visualized using particle imaging velocimetry. The presence of the pump mechanism led to a 4-fold increase in sensitivity compared to the purely photothermal effect, demonstrating the potential of these photothermomechanical nanopumps for sensing applications.
Article
Optics
Daniel Repp, Angela Barreda, Francesco Vitale, Isabelle Staude, Ulf Peschel, Carsten Ronning, Thomas Pertsch
Summary: Semiconductor nanowire lasers can have their lasing threshold modified by their environment, and using metallic substrates can access low-volume Surface-Plasmon-Polariton (SPP) modes and describe mode competition in nanowire lasers. The study found that an aluminum substrate decreases the lasing threshold for ZnO nanowire lasers, while a silver substrate increases the threshold compared to a dielectric substrate. These findings allow for predictions about the interaction between planar metals and semiconductor nanowires, guiding future improvements in highly-integrated laser sources.
Article
Materials Science, Multidisciplinary
Fridtjof Betz, Felix Binkowski, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger
Summary: This study presents a quasinormal mode expansion approach for quadratic observables, utilizing the rigorous Riesz projection method. The applicability of the method is demonstrated through numerical implementation of a state-of-the-art quantum light source, with emphasis on modal expansions outside the underlying nanophotonic resonator.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Chengjun Zou, Purushottam Poudel, Sarah L. Walden, Katsuya Tanaka, Alexander Minovich, Thomas Pertsch, Felix H. Schacher, Isabelle Staude
Summary: Tunability is crucial for practical applications of high-efficiency metasurface-based nanophotonic devices and systems. The research in this area has made significant progress in terms of tuning mechanisms, speed, and active functionalities. However, most of the demonstrated works are based on a single type of physical stimulus, which limits the modulation range and design options of the metadevices. This article experimentally demonstrates that multi-responsive metasurfaces can be achieved by combining asymmetric, highly resonant metasurfaces with multi-responsive polymeric materials, providing new design freedom for multifunctional metadevices.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Applied
F. Vitale, D. Repp, T. Siefke, U. Zeitner, U. Peschel, T. Pertsch, C. Ronning
Summary: In this study, a mode selection scheme based on distributed feedback was proposed to achieve quasi-single mode lasing action in plasmonic nanowires. The orientation of the nanowire on the grating was found to affect the emission spectrum, with an additional peak emerging when the nano-cavity was perpendicular to the ridge direction. This peak was attributed to a hybrid mode dominating the mode competition and supported by localized plasmon polaritons on the metal grating ridges.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Aso Rahimzadegan, Sergey Lepeshov, Wenjia Zhou, Duk-Yong Choi, Juergen Sautter, Dennis Arslan, Chengjun Zou, Stefan Fasold, Carsten Rockstuhl, Thomas Pertsch, Yuri Kivshar, Isabelle Staude
Summary: Introduced metasurfaces as promising candidates to replace bulky optical components, and explored dielectric metasurfaces with complex supercells composed of Mie-resonant dielectric nanocylinders and nanoscale rings. Demonstrated the signature of an optical response relying on staggered optically induced magnetic dipole moments, and suggested possible applications in resonant nanophotonics by broadening the modulation capabilities of metasurfaces.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Yunus Denizhan Sirmaci, Angela Barreda Gomez, Thomas Pertsch, Jens H. Schmid, Pavel Cheben, Isabelle Staude
Summary: The paper proposes and demonstrates a novel silicon nanophotonic waveguide consisting of a chain of resonantly forward scattering nanoparticles with spectrally overlapping electric and magnetic dipolar Mie-type resonances. The propagation loss of the meta-waveguides in the telecom spectral range is as low as 0.4 dB mm(-1), surpassing the current record for Mie-resonant waveguides by more than an order of magnitude. The meta-waveguides also support a negative group index over a broad spectral range and exhibit regions of vanishing and anomalous dispersion within the transmission band. Furthermore, compact resonance-protected waveguide bends and efficient splitters can be implemented within just 320 nm propagation length.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Lucas Rickert, Fridtjof Betz, Matthias Plock, Sven Burger, Tobias Heindel
Summary: This paper presents a numerical investigation of directly fiber-coupled hybrid circular Bragg gratings (CBGs) featuring electrical control for operation in the application relevant wavelength regimes. The proposed high-performance designs combine hybrid CBGs with a dielectric planarization and a transparent contact material, enabling high direct fiber coupling efficiency and exhibiting Purcell factors. The identified designs can sustain expected fiber efficiencies and average Purcell factors assuming conservative fabrication accuracies, and electrical field strengths suitable for Stark-tuning of an embedded quantum dot can be reached.
Article
Materials Science, Multidisciplinary
Viktor Bender, Tobias Bucher, Mohammad Nasimuzzaman Mishuk, Yuxuan Xie, Isabelle Staude, Falk Eilenberger, Kurt Busch, Thomas Pertsch, Bayarjargal N. Tugchin
Summary: Photoluminescence spectroscopy is used to study the excitonic properties of mechanically exfoliated monolayer MoS2 under various physical and chemical stimuli. The study characterizes midgap exciton states originating from lattice defects and compares them to existing models. Statistical data analyses reveal a photoluminescence enhancement through physisorption of water molecules on the controversial excited-state A biexciton (AXX*). Additionally, the study shows that surface roughness does not account for changes in doping level within monolayer MoS2 on gold substrates, and reports a shift in the electron-phonon coupling properties due to physisorbed water films on top of the samples.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Instruments & Instrumentation
Matthias Plock, Martin Hammerschmidt, Sven Burger, Philipp-Immanuel Schneider, Christof Schuette
Summary: In optical nano metrology, numerical models are widely used for parameter reconstructions. Using the Bayesian target vector optimization method, a finite element numerical model was fitted to a Grazing Incidence x-ray fluorescence data set to obtain the geometrical parameters of a nano structured line grating. Gaussian process, stochastic machine learning surrogate models, were trained during the reconstruction and sampled afterwards to determine the distribution of the reconstructed model parameters. The polynomial order of the finite element ansatz functions was investigated to understand its impact on the reconstructed parameters and model parameter distributions. This study demonstrated the importance of determining numerical parameters for efficient and accurate reconstruction results.
Article
Nanoscience & Nanotechnology
Maryam Moradi, Isabelle Staude, Thomas Pertsch, Michael Jaeger, Ulrich S. Schubert
Summary: By utilizing a spin-coating-based sample fabrication procedure, we developed a gold-quantum dot hybrid system that exhibited reversible photoluminescence switching in response to redox processes. The system relied on a nanometric thick polymer spacer layer that was redox-responsive, enabling attachment of the quantum dots to a gold film. The study demonstrated a reversible and reproducible 2.3 ± 0.6-fold photoluminescence intensity switching factor upon oxidation and reduction of the spacer layer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sebastian Klimmer, Giancarlo Soavi, Isabelle Staude, Angela Barreda
Summary: This study proposes a new hybrid platform to enhance the excitation and emission of dark excitons in transition metal dichalcogenides, offering distinct advantages for opto-electronic and valleytronic devices.
