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Orthorhombic Phase MoO3 Nanobelts Gas Sensor for Ultra-sensitive Detection of Triethylamine

IEEE Transactions on Instrumentation and Measurement 2025年 74卷

作者： Meng, Fanli Cui, Weijia Liu, Yang Shen, Yanbai Yuan, Zhenyu National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University State Key Laboratory of Synthetical Automation for Process Industries The College of Information Science and Engineering Shenyang110819 China Ministry of Education Northeastern University Key Laboratory of Data Analytics and Optimization for Smart Industry Shenyang110819 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao066004 China Northeastern University College of Information Science and Engineering Shenyang110819 China Northeastern University School of Resources and Civil Engineering Department of Minerals Processing Engineering Shenyang110819 China

In view of the poor sensitivity and upper detection limit of triethylamine gas sensors, high performance triethylamine sensor was prepared by adjusting the crystalline phase of MoO3. In this work, the orthorhombic phase MoO3 nanobelts were synthesized through hydrothermal method and used for the detection of triethylamine. The experimental outcomes indicate that the orthorhombic phase MoO3 gas sensor exhibits the peak responsiveness, which reaches 774.47 when the concentration of triethylamine is 100 ppm at 220°C accompanied by a theoretical detection threshold as minute as 10 ppb. The orthorhombic phase MoO3 sensor has superior selectivity for triethylamine stemming from the robust Lewis acid-base interplay with MoO3 and triethylamine and the C-N of triethylamine is easily broken. Finally, the sensing mechanism of orthorhombic phase MoO3 gas sensor is deeply analyzed. Since orthorhombic phase MoO3 possesses a narrow band gap and small size effect, and has a high adsorption energy for triethylamine, the gas sensor exhibits excellent performance. The strategic design of crystalline phase modulation serves as a pivotal approach to enhancing the properties of gas sensors. © 1963-2012 IEEE.

关键词： Nanobelts

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Forecast for weighing neutrinos in cosmology with SKA

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Science China(Physics,Mechanics & Astronomy) 2020年第8期63卷 53-60页

作者： Jing-Fei Zhang Bo Wang Xin Zhang Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Ministry of Education’s Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern UniversityShenyang 110819China Center for High Energy Physics Peking UniversityBeijing 100080China

We investigate what role the SKA neutral hydrogen(HI)intensity mapping(IM)and galaxy sky surveys will play in weighing neutrinos in *** use the simulated data of the baryon acoustic oscillation(BAO)measurements from the HI surveys based on SKA1(IM)and SKA2(galaxy)to do the *** the current observations,we use the Planck 2015 cosmic microwave background(CMB)anisotropies observation,the optical BAO measurements,the type Ia supernovae(SN)observation(Pantheon compilation),and the latest H0 *** consider three mass ordering cases for massive neutrinos,i.e.,the normal hierarchy(NH),inverted hierarchy(IH),and degenerate hierarchy(DH)*** is found that the SKA observation can significantly improve the constraints on?m and *** to the current observation,the SKA1 data can improve the constraints on?m by about 33%,and on H0 by about 36%;the SKA2 data can improve the constraints on?m by about 58%,and on H0 by about 66%.It is also found that the SKA observation can only slightly improve the constraints on∑mν.Compared to the current observation,the SKA1 data can improve the constraints on∑mνby about 4%,3%,and 10%,for the NH,IH,and DH cases,respectively;the SKA2 data can improve the constraints on∑mνby about 7%,7%,and 16%,for the NH,IH,and DH cases,respectively.

关键词： 21 cm observation intensity mapping survey Square Kilometre Array baryon acoustic oscillations neutrino mass

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Revisiting holographic dark energy after DESI 2024

arXiv

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arXiv 2024年

作者： Li, Tian-Nuo Li, Yun-He Du, Guo-Hong Wu, Peng-Ju Feng, Lu Zhang, Jing-Fei Zhang, Xin Liaoning Key Laboratory of Cosmology and Astrophysics College of Sciences Northeastern University Shenyang110819 China School of Physics Ningxia University Yinchuan750021 China College of Physical Science and Technology Shenyang Normal University Shenyang110034 China MOE Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern University Shenyang110819 China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China

New insights from the Dark Energy Spectroscopic Instrument (DESI) 2024 baryon acoustic oscillations (BAO) data, in conjunction with cosmic microwave background (CMB) and Type Ia supernova (SN) data, suggest that dark energy may not be a cosmological constant. In this work, we investigate the cosmological implications of holographic dark energy (HDE) and interacting holographic dark energy (IHDE) models, utilizing CMB, DESI BAO, and SN data. By considering the combined DESI BAO and SN data, we determine that in the IHDE model, the parameter c > 1 and the dark-energy equation of state w does not cross −1 at the 1σ confidence level, whereas in the HDE model, it marginally falls below this threshold. Upon incorporating CMB data, we observe that in the HDE model, the parameter c Copyright © 2024, The Authors. All rights reserved.

关键词： Dark energy

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Exploring the key Features of Repeating Fast Radio Bursts with Machine Learning

arXiv

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arXiv 2024年

作者： Sun, Wan-Peng Zhang, Ji-Guo Li, Yichao Hou, Wan-Ting Zhang, Fu-Wen Zhang, Jing-Fei Zhang, Xin Liaoning Key Laboratory of Cosmology and Astrophysics College of Sciences Northeastern University Shenyang110819 China College of Mathematics and Statistics Liaoning University Shenyang110036 China College of Science Guilin University of Technology Guilin541004 China MOE Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern University Shenyang110819 China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China

Fast radio bursts (FRBs) are enigmatic high-energy events with unknown origins, which are observationally divided into two categories, i.e., repeaters and non-repeaters. However, there are potentially a number of non-repeaters that may be misclassified, as repeating bursts are missed due to the limited sensitivity and observation periods, thus misleading the investigation of their physical properties. In this work, we propose a repeater identification method based on the t-distributed Stochastic Neighbor Embedding algorithm and apply the classification to the first Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) catalog. We find that the spectral morphology parameters, specifically spectral running (r), represent the key features for identifying repeaters from the non-repeaters. Also, the results suggest that repeaters are more biased toward narrowband emission, whereas non-repeaters are inclined toward broadband emission. We provide a list of 163 repeater candidates, five of which are confirmed with an updated repeater catalog from CHIME/FRB. Our findings improve our understanding of the various properties underlying repeaters and non-repeaters, as well as guidelines for future FRB detection and categorization. Copyright © 2024, The Authors. All rights reserved.

关键词： Radio

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Dark energy versus modified gravity: Impacts on measuring neutrino mass

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Science China(Physics,Mechanics & Astronomy) 2020年第3期63卷 44-53页

作者： MingMing Zhao RuiYun Guo DongZe He JingFei Zhang Xin Zhang Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Ministry of Education’s Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern UniversityShenyang 110819China Center for High Energy Physics Peking UniversityBeijing 100080China

In this paper,we make a comparison for the impacts of smooth dynamical dark energy,modified gravity,and interacting dark energy on the cosmological constraints on the total mass of active *** definiteness,we consider theΛCDM model,the w CDM model,the f(R)model,and two typical interacting vacuum energy models,i.e.,the IΛCDM1 model with Q=βHρc and the IΛCDM2 model with Q=βHρΛ.In the cosmological fits,we use the Planck 2015 temperature and polarization data,in combination with other low-redshift observations including the baryon acoustic oscillations,the type Ia supernovae,the Hubble constant measurement,and the large-scale structure observations,such as the weak lensing as well as the redshift-space ***,the Planck lensing measurement is also employed in this *** find that,the w CDM model favors a higher upper limit on the neutrino mass compared to theΛCDM model,while the upper limit in the f(R)model is similar with that in theΛCDM *** the interacting vacuum energy models,the IΛCDM1 model favors a higher upper limit on neutrino mass,while the IΛCDM2 model favors an identical neutrino mass with the case ofΛCDM.

关键词： neutrino mass dark energy modified gravity interacting dark energy cosmological observations

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Strongly lensed type Ia supernovae as a precise late-Universe probe of measuring the Hubble constant and cosmic curvature

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Physical Review D 2022年第2期106卷 023520-023520页

作者： Jing-Zhao Qi Yu Cui Wei-Hong Hu Jing-Fei Zhang Jing-Lei Cui Xin Zhang Department of Physics College of Sciences Northeastern University Shenyang 110819 China Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang 110819 China Key Laboratory of Data Analytics and Optimization for Smart Industry (Northeastern University) Ministry of Education Shenyang 110819 China

Strongly lensed type Ia supernovae (SNe Ia) are expected to have some advantages in measuring time delays of multiple images, and so they have a great potential to be developed into a powerful late-Universe cosmological probe. In this paper, we simulate a sample of lensed SNe Ia with time-delay measurements in the era of the Legacy Survey of Space and Time (LSST). Based on the distance sum rule, we use lensed SNe Ia to implement cosmological model-independent constraints on the Hubble constant H0 and cosmic curvature parameter ΩK in the late Universe. We find that if 20 lensed SNe Ia could be observed, the constraint on H0 is better than the measurement by the SH0ES Collaboration. When the event number of lensed SNe Ia increases to 100, the constraint precision of H0 is comparable with the result from Planck 2018 data. Considering 200 lensed SNe Ia events as the optimistic estimation, we obtain ΔH0=0.33 km s−1 Mpc−1 and ΔΩK=0.053. In addition, we also simulate lensed quasars in different scenarios to make a comparison and we find that they are still a useful cosmological probe even though the constraint precision from them is much less than that obtained from lensed SNe Ia. In the era of LSST, the measurements of time delay from both lensed SNe Ia and lensed quasars are expected to yield the results of ΔH0=0.26 km s−1 Mpc−1 and ΔΩK=0.044.

关键词： Cosmological parameters Cosmology Gravitational lenses

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Nanohertz gravitational waves from a quasar-based supermassive black hole binary population model as dark sirens

arXiv

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arXiv 2024年

作者： Xiao, Si-Ren Shao, Yue Wang, Ling-Feng Song, Ji-Yu Feng, Lu Zhang, Jing-Fei Zhang, Xin Liaoning Key Laboratory of Cosmology and Astrophysics College of Sciences Northeastern University Shenyang110819 China School of Physics and Optoelectronic Engineering Hainan University Haikou570228 China College of Physical Science and Technology Shenyang Normal University Shenyang110034 China MOE Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern University Shenyang110819 China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China

Recently, several pulsar timing array (PTA) projects have detected evidence of the existence of a stochastic gravitational wave background (SGWB) in the nanohertz frequency band, providing confidence in detecting individual supermassive black hole binaries (SMBHBs) in the future. Nanohertz GWs emitted by inspiraling SMBHBs encode the luminosity distances of SMBHBs. They can serve as dark sirens to explore the cosmic expansion history via a statistical method to obtain the redshift information of GW sources’ host galaxies using galaxy catalogs. The theoretical analysis of the dark siren method relies on the modeling of the population of SMBHBs. Using a population model consistent with the latest SGWB observations is essential, as the SGWB provides significant information about the distribution of SMBHBs. In this work, we employ a quasar-based model, which can self-consistently account for the SGWB amplitude, to estimate the population of SMBHBs. We constrain the Hubble constant using the mock GW data from different detection cases of PTAs in the future. Our results show that a PTA consisting of 100 pulsars with a white noise level of 20 ns could measure the Hubble constant with a precision close to 1% over a 10-year observation period, and a PTA with 200 pulsars may achieve this goal over a 5-year observation period. The results indicate that modeling the SMBHB population significantly influences the analysis of dark sirens, and SMBHB dark sirens have the potential to be developed as a valuable cosmological probe. Copyright © 2024, The Authors. All rights reserved.

关键词： White noise

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Impacts of dark energy on constraining neutrino mass after Planck 2018

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Communications in Theoretical Physics 2020年第12期72卷 163-170页

作者： Ming Zhang Jing-Fei Zhang Xin Zhang Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Key Laboratory of Data Analytics and Optimization for Smart Industry(Northeastern University) Ministry of EducationShenyang 110819China Center for Gravitation and Cosmology Yangzhou UniversityYangzhou 225009China

Considering the mass splittings of three active neutrinos,we investigate how the properties of dark energy affect the cosmological constraints on the total neutrino mass∑mv using the latest cosmological *** this paper,several typical dark energy models,including ACDM,wCDM,CPL,and HDE models,are *** the analysis,we also consider the effects from the neutrino mass hierarchies,*** degenerate hierarchy(DH),the normal hierarchy(NH),and the inverted hierarchy(IH).We employ the current cosmological observations to do the analysis,including the Planck 2018 temperature and polarization power spectra,the baryon acoustic oscillations(BAO),the type Ia supernovae(SNe),and the Hubble constant H0 *** the ACDM+∑mv model,we obtain the upper limits of the neutrino mass∑mv<0.123 eV(DH),∑mv<0.156 eV(NH),and∑mv<0.185 eV(IH)at the 95%C.L.,using the Planck+BAO+SNe data *** the wCDM+∑mv model and the CPL+∑mv model,larger upper limits of∑mv are obtained compared to those of the ACDM+∑mv *** most stringent constraint on the neutrino mass,∑mv<0.080 eV(DH),is derived in the HDE+∑mv *** addition,we find that the inclusion of the local measurement of the Hubble constant in the data combination leads to tighter constraints on the total neutrino mass in all these dark energy models.

关键词： neutrino mass mass hierarchies of neutrinos dark energy cosmological constraints Planck 2018

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Hollow Urchin Co-Fe2o3 With Outstanding Selectivity and Fast Responding For Ppb Level Nh3 Sensing Via Lewis Acid-Base Effect

SSRN

引用

SSRN 2023年

作者： Liu, Yang Ji, Hanyang Yuan, Zhenyu Zhu, Hongmin Kong, Lu Gao, Hongliang Meng, Fanli College of Information Science and Engineering Northeastern University Shenyang110819 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao066004 China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China Key Laboratory of Data Analytics and Optimization for Smart Industry Northeastern University Ministry of Education Shenyang110819 China

Layered double hydroxides (LDH) are a class of layered compounds, which are popular among researchers because of the large specific surface area and excellent catalytic properties. In this work, Co-Fe2O3 2 was prepared with urchin Co-Fe LDH as a precursor. The morphology of Co-Fe2O3 2 was not changed, and burrs were evenly distributed on the surface with a diameter of about 3-5 nm. Co-Fe2O3 2 showed outstanding gas sensitivity to NH3, with favourable repeatability, stability and selectivity, as well as an ultra-low application detection limit of 10 ppb (response was 5%). The response of the sensor to 10 ppm NH3 at 275 °C was 298% with a fast response/recovery rate (7.2/5.4 s). BET revealed that the specific surface area of Co-Fe2O3 2 was 114.5 m2/g, which could provide more sites for gas adsorption and reaction. The results of XPS, Raman, and FTIR spectras indicated that some Co2+ replaced the position of Fe3+ to generate abundant oxygen vacancy, which could enhance the activity of the sensitive material. The small size effect and the formation of p-n junction increased the adsorption capacity of the sensitive material. Moreover, the synergistic effect of Lewis acid-base and catalytic of Co3O4 greatly improved the selectivity of the sensor to NH3. The growth process and principle of Co-Fe LDH were discussed and analyzed in detail, which provided a new idea for the controlled synthesis of LDH. Co-Fe2O3 2 is a promising gas-sensitive material for the rapid detection of ammonia. © 2023, The Authors. All rights reserved.

关键词： Oxygen vacancies

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Cosmological perturbations in the energy-momentum squared gravity theory:constraints from gravitational wave standard sirens and redshift space distortions

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Chinese Physics C 2025年第4期 202-211页

作者：付启铭张鑫 Institute of Physics Shaanxi University of Technology Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory of Quantum Theory andApplications of MoELanzhou University Key Laboratory of Cosmology and Astrophysics (Liaoning) & College of Sciences Northeastern University Key Laboratory of Data Analytics and Optimization for Smart Industry (Ministry of Education) Northeastern University National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University

We investigate the linear cosmological perturbations in the context of the so-called energy-momentum squared gravity(EMSG) *** research shows that the EMSG theory can reproduce a viable background cosmological evolution comparable to ΛCDM,whereas the matter-dominated era exhibits slight *** this paper,we focus on power-law EMSG models and derive the equations for the linear cosmological *** explore the propagation of the gravitational wave(GW) and the growth of matter density perturbation at the first order,and we estimate the model parameters from the simulated GW and observed redshift space distortion *** analysis reveals that the model parameters should be small and positive in the 1 σ confidence interval,which indicates that the theory agrees closely with the observational data and can be considered an alternative to the standard cosmological model.

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