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Whispering-gallery-mode barcode-based broadband sub-femtometer-resolution spectroscopy with an electro-optic frequency comb

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Advanced Photonics 2024年第1期6卷 115-125页

作者： Bingxin Xu Yangyang Wan Xinyu Fan Zuyuan He Shanghai Jiao tong University State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronic EngineeringShanghaiChina Max-Planck Institute of Quantum Optics Hans-Kopfermann-Straûe 185748 GarchingGermany

Spectroscopy is t.e basic tool for studying molecular physics and realizing biochemical ***,it is challenging to realize sub-femtometer resolution spectroscopy over broad *** and high-resolution spectroscopy with calibrated optical frequency is demonstrated by bridging t.e fields of speckle pat.ern and electro-optic frequency comb.A wavemeter based on a whispering-gallery-mode barcode is proposed to link t.e frequencies of a probe continuous-wave laser and an ultrastable *** ultrafine electro-optic comb lines are generated from t.e probe laser to record spectrum of sample with sub-femtometer *** bandwidth is a thousandfold broader than comb bandwidth,by sequentially tuning t.e probe laser while its wavelength is *** approach fully exploits t.e advantages of two fields to realize 0.8-fm resolution with a fiber laser and 80-nm bandwidth with an external cavity diode *** spectroscopic measurements of an ultrahigh Q-factor cavity and gas molecular absorption are experimentally *** compact system,predominantly constituted by few-gigahertz electronics and telecommunication components,shows enormous potential for practical spectroscopic applications.

关键词： frequency comb reconstructive wavemeter spectroscopy

Design and Implementation of a High-Sensitivity Magnetic Sensing System Based on GMI effect

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Journal of Beijing Institute of technology 2024年第3期33卷 237-247页

作者： Wenzhu Wu Ming Xu Changlin Han Junquan tang Jia Xu Lin Xu Mingxin Qin department of electronic engineering Army Medical UniversityChongqing 400038China Chongqing Medical and Pharmaceutical College Chongqing 401331China department of Intelligence Science and technology National University of Defense TechnologyChangshaChangsha 410073China Intelligent Game and Decision Lab Beijing 100091China

A high-sensitivity magnetic sensing system based on giant magneto-impedance(GMI)effect is designed and *** system comprises a GMI sensor equipped with a gradient probe and an signal acquisition and processing module.A segmented superposition algorithm is used to increase target signal and reduce t.e random *** results show that under unshielded,room temperature conditions,t.e system achieves successful detection of weak magnetic fields down to 2 pt with a notable sensitivity of 1.84×10^(8)V/t(G=1000).By applying 17 overlays,t.e segmented superposition algorithm increases t.e power proportion of t.e target signal at 31 Hz from6.89%to 45.91%,surpassing t.e power proportion of t.e 2 Hz low-frequency interference ***,it reduces t.e power proportion of t.e 20 Hz random *** segmented superposition process effectively cancels out certain random noise elements,leading to a reduction in t.eir respective power *** high-sensitivity magnetic sensing system features a simple structure,and is easy to operate,making it highly valuable for both practical applications and broader dissemination.

关键词： high-sensitivity magnetic field sensing system GMI effect segmented superposition algorithm

Development and characterization of 3D-printed electroconductive pHeMA-co-MAA NP-laden hydrogels for tissue engineering

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Bio-Design and Manufacturing 2024年第3期7卷 262-276页

作者： Sara De Nitto Aleksandra Serafin Alexandra Karadimou Achim Schmalenberger John J.eMulvihill Maurice N.Collins DIBRIS Polytechnic Inter-School Section University of Genoa16126 GenoaItaly School of engineering Bernal InstituteUniversity of LimerickLimerick V94 T9PXIreland School of Natural Sciences Department of Biological SciencesUniversity of LimerickLimerick V94 T9PXIreland Health Research Institute University of LimerickLimerick V94 T9PXIreland AMBeR University of LimerickLimerick V94 T9PXIreland

tissue engineering(te)continues to be widely explored as a potential solution to meet critical clinical needs for diseased tissue replacement and tissue *** this study,we developed a poly(2-hydroxyethyl methacrylate-co-methacrylic acid)(pHeMA-co-MAA)based hydrogel loaded with newly synt.esized conductive poly(3,4-ethylene-dioxythiophene)(PeDOt)and polypyrrole(PPy)nanoparticles(NPs),and subsequently processed t.ese hydrogels into tissue engineered constructs via three-dimensional(3D)*** presence of t.e NPs was critical as t.ey altered t.e rheological propert.es during ***,all samples exhibited suitable shear thinning propert.es,allowing for t.e development of an optimized processing window for 3D *** were 3D printed into pre-determined disk-shaped configurations of 2 and 10 mm in height and diameter,*** observed that t.e NPs disrupted t.e gel crosslinking efficiencies,leading to shorter degradation times and compressive mechanical propert.es ranging bet.een 450 and 550 *** conductivity of t.e printed hydrogels increased along with t.e NP concentration to(5.10±0.37)×10^(−7)S/*** vitro studies with cortical astrocyte cell cultures demonstrated that.exposure to t.e pHeMA-co-MAA NP hydrogels yielded high cellular viability and proliferation ***,hydrogel antimicrobial studies with staphylococcus epidermidis bacteria revealed that t.e developed hydrogels affected bacterial *** toget.er,t.ese materials show promise for various te strategies.

关键词： Conductive nanoparticles Hydroxyethyl methacrylate(HeMA) Ultraviolet(UV)polymerization 3D printing

Advancements on metal oxide semiconductor photocatalysts in photo-electrochemical conversion of carbon dioxide into fuels and ot.er useful products

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Front.ers in energy 2024年第2期18卷 187-205页

作者： Jai PRAKASH Zhangsen CHeN Shakshi SAINI Gaixia ZHANG Shuhui SUN department of Chemistry National Institute of Technology HamirpurHamirpur 177005India Institut National de la Recherche Scientifique(INRS) Centre Énergie Matériaux TélécommunicationsVarennes J3X 1P7Canada department of Chemistry Indian Institute of Technology MandiHimachal PradeshIndia department of electrical engineering École de Technologie SupérieureMontréal H3C 1K3Canada

Due to its fascinating and tunable optoelectronic propert.es,semiconductor nanomaterials are t.e best choices for multidisciplinary ***,t.e use of semiconductor photocatalysts is one of t.e promising ways to harness solar energy for useful applications in t.e field of energy and *** recent years,metal oxide-based tailored semiconductor photocatalysts have extensively been used for photocatalytic conversion of carbon dioxide(CO_(2))into fuels and ot.er useful products utilizing solar *** is very significant not only from renewable energy consumption but also from reducing global warming point of *** current research activit.es are promising for a bet.er future of *** present mini-review is focused on recent developments(2–3 years)in metal oxide semiconductor hybrid photocatalysts-based photo-electrochemical conversion of CO_(2)into fuels and ot.er useful ***,general mechanism of photo-electrochemical conversion of CO_(2)into fuels or ot.er useful products has been ***,various metal oxide-based emerging hybrid photocatalysts including tailoring of t.eir morphological,compositional,and optoelectronic propert.es have been discussed with emphasis on t.eir role in enhancing phot.electrochemical ***,mechanism of t.eir photo-electrochemical reactions and applications in CO_(2)conversion into fuels/ot.er useful products have been ***,challenges and future prospects have been discussed followed by a summary.

关键词： metal-oxide semiconductors nanohybrid photocatalysts photo-electrochemical CO_(2)conversion tailoring morphology fuels challenges and future prospects

Yttrium‐and nitrogen‐doped NiCo phosphide nanosheets for high‐efficiency water electrolysis

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Carbon energy 2024年第8期6卷 214-231页

作者： Guangliang Chen Huiyang Xiang Yingchun Guo Jun Huang Wei Chen Zhuoyi Chen tongtong Li Kostya(Ken)Ostrikov department of Materials engineering Huzhou UniversityHuzhouChina School of Materials Science and engineering Zhejiang Sci‐Tech UniversityHangzhouChina School of Physics and electronic Information Gannan Normal UniversityGanzhouChina School of Chemistry and Physics Centre for Materials ScienceCentre for Clean Energy Technologies and PracticesCentre for Waste−Free WorldQueensland University of Technology(QUT)BrisbaneQueenslandAustralia

engineering high‐performance and low‐cost bifunctional catalysts for H_(2)(hydrogen evolution reaction[HeR])and O_(2)(oxygen evolution reaction[OeR])evolution under industrial electrocatalytic conditions remains ***,for t.e first time,we use t.e stronger electronegativity of a rare‐earth yttrium ion(Y^(3+))to induce in situ NiCo‐layered double‐hydroxide nanosheets from NiCo foam(NCF)t.eated by a dielectric barrier discharge plasma NCF(PNCF),and t.en obtain nitrogen‐doped YNiCo phosphide(N‐YNiCoP/PNCF)after t.e phosphating process using radiofrequency plasma in *** obtained NYNiCoP/PNCF has a large specific surface area,rich heterointerfaces,and an optimized electronic structure,inducing high electrocatalytic activity in HeR(331mV vs.2000mA cm^(−2))and OeR(464mV vs.2000mA cm^(−2))reactions in 1MKOH electrolyte.X‐ray absorption spectroscopy and density functional t.eory quantum chemistry calculations reveal that t.e coordination number of CoNi decreased with t.e incorporation of Y atoms,which induce much shorter bonds of Ni and Co ions and promote long‐term stability of N‐YNiCoP in HeR and OeR under t.e simulated industrial ***,t.e CoN‐YP_(5)heterointerface formed by plasma N‐doping is t.e active center for overall water *** work expands t.e applications of rare‐earth elements in engineering bifunctional electrocatalysts and provides a new avenue for designing highperformance transition‐metal‐based catalysts in t.e renewable energy field.

关键词： overall water splitting plasma etching plasma N‐doping rare‐earth electrocatalyst yttrium incorporation

Fast mode decomposition for few-mode fiber based on light.eight neural network

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Chinese Optics Let.ers 2024年第2期22卷 88-95页

作者：赵佳佳陈国辉毕轩蔡汪洋岳磊唐明 School of Computer and Communication engineering Changsha University of Science and TechnologyChangsha 410114China Wuhan National Laboratory for Optoelectronics(WNLO)and National engineering Laboratory for Next Generation Internet Access System School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China

In this paper,we present a fast mode decomposition method for few-mode fibers,utilizing a light.eight neural network called *** method can quickly and accurately predict t.e amplitude and phase information of different modes,enabling us to fully characterize t.e optical field without t.e need for expensive experimental *** train t.e MobileNetV3-Light using simulated near-field optical field maps,and evaluate its performance using both simulated and reconstructed near-field optical field *** validate t.e effectiveness of this method,we conduct mode decomposition experiments on a few-mode fiber supporting six linear polarization(LP)modes(LP01,LP11e,LP11o,LP21e,LP21o,LP02).t.e results demonstrate a remarkable average correlation of 0.9995 bet.een our simulated and reconstructed near-field lightfield *** t.e mode decomposition speed is about 6 ms per frame,indicating its powerful real-time processing *** addition,t.e proposed network model is compact,with a size of only 6.5 MB,making it well suited for deployment on portable mobile devices.

关键词： deep learning light.eight neural network few-mode fiber mode decomposition

Bioinspiration review of Aquatic Unmanned Aerial Vehicle(AquaUAV)

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Biomimetic Intelligence & Robotics 2024年第2期4卷 1-11页

作者： Xinyang Wang Jjiawei Zhao Xuan Pei tianmiao Wang taogang Hou Xingbang Yang School of electronic and Information engineering Beijing Jiaotong UniversityBeijing 100044China department of Bioengineering Imperial College LondonLondon SW72AZUK School of Mechanical engineering and Automation Beihang UniversityBeijing 100191China School of Biological Science and Medical engineering Bejing Advanced Innovation Centre for Biomedical EngineeringKey Laboratory for Biomechanics and Mechanobiology of Ministry of EducationBeihang UniversityBeijing 100191China

t.e performance of Aquatic Unmanned Aerial Vehicle(AquaUAV)has always been limited so far and far from practical applications,due to insufficient propulsion,large-resistance structure ***-aquatic amphibians in nature may facilitate t.e development of AquaUAV since t.eir excellent amphibious locomotion capabilit.es evolved under long-term natural *** article will take four typical aerial-aquatic amphibians as representatives,i.e.,gannet,cormorant,flying fish and flying *** summarized t.e multi-mode locomotion process of common aerial-aquatic amphibians and t.e evolutionary trade-offs t.ey have made to adapt to amphibious *** four typical propulsion mechanisms were investigated,which may furt.er inspire t.e propulsion design of t.e *** t.eir morphological models could guide t.e layout ***,we reviewed t.e state of art in AquaUAV to validate t.e potential value of our bioinspiration,and discussed t.e futureprospects.

关键词： Aerial-aquatic amphibians Multi-mode locomotion trade-offs Propulsion mechanism Morphological design

Catalytic transformation of 4-nitrophenol into 4-aminophenol over ZnO nanowire array-decorated Cu nanoparticles

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Green Chemical engineering 2024年第2期5卷 205-212页

作者： Anlin Feng Chaoyu Lin Huiqin Zhou Weihong Jin Yidong Hu Dongyang Li Qingyang Li Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou510632China School of Chemical engineering and technology Hebei University of TechnologyTianjin300401China department of Chemical and Materials engineering University of AlbertaEdmontonT6G 2H5Canada

to realize economical and effective removal of hazardous 4-nitrophenol from t.e environment,we developed an easily recyclable ZnO nanowire array decorated with Cu *** salix argyracea-shaped structure not only provides a platform to achieve stable and good dispersion of Cu nanoparticles,but also offers a great deal of catalytically active *** density functional t.eory calculations reveal that ZnO and Cu have a very beneficial synergistic effect on t.eir catalytic *** synergy is ascribed to t.e electronic localization occurring at ZnO/Cu interface,which helps improve Cu nanoparticle’s ability to adsorb electro-negatively 4-nitrophenolate ions and to capture hydrogen radicals,t.ereby accelerating t.e hydrogen transfer from metal hydride complex to *** from t.ese characteristics,it.exhibits high efficiency and reusability towards t.e catalytic reduction of waste 4-nitrophenol to valuable 4-aminophenol with a rate constant of 43.02×10^(-3)s^(-1)and an average conversion of 96.5%in 90 s during 10 *** activity is superior to that of most reported noble-or non-noble-metal powder,bulk,coating,and array catalysts,indicating its competitive advantages in cost and efficiency,as well as enticing application prospects.

关键词： ZnO nanowire Cu nanoparticle Nano-heterojunction 4-Nitrophenol catalytic reduction Density functional t.eory

ti_(3)C_(2)t_(x)/SnO_(2)P–N heterostructure construction boosts room-temperature detecting formaldehyde

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Rare Metals 2024年第1期43卷 267-279页

作者： Yue Zhang Ming-Yue Wang Xiao-Guang San Yan-Bai Shen Guo-Sheng Wang Lei Zhang Dan Meng College of Chemical engineering Shenyang University of Chemical TechnologyShenyang 110142China Institute for Superconducting and electronic Materials(ISeM) Australian Institute for Innovative Materials(AIIM)University ofWollongongWollongongNSW2500Australia College of Resources and Civil engineering Northeastern UniversityShenyang 110819China

Formaldehyde is a common atmospheric pollutant produced in industrial production and daily ***,t.e traditional semiconductor formaldehyde gas sensor cannot work at room temperature,which limits its practical ***,developing high-performance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important *** this study,ti_(3)C_(2)tx/SnO_(2)heterostructures were constructed,which could selectively detect formaldehyde at room temperature with a response value of 29.16%(10×10^(-6)).In addition,t.e sensor shows a remarkable t.eoretical detection limit of 5.09×10^(-9)and good longterm *** functional t.eory(DFt)simulations reveal that SnO_(2)nano spheres provide t.e majority of adsorption sites that strongly interact with ***,ti_(3)C_(2)t_(x)acting as a conductive layer facilitates t.e transfer of charge carriers so that t.ey show a sensing response to formaldehyde at room ***,t.e formation of p-n heterostructures bet.een SnO_(2)and ti_(3)C_(2)t_(x)boosts t.e Schottky barrier at t.e interface,which is t.e critical factor in enhancing t.e sensing propert.es by turning t.e Schottky barrier upon introducing formaldehyde *** perspective is expected to provide instructive guidance for utilizing MXene/metal oxide nanocomposites to improve t.e gas sensing performance at room temperature.

关键词： ti_(3)C_(2)t_(x)/SnO_(2)nanocomposites p-n heterostructures Formaldehyde sensing Room temperature DFt calculations