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  1. AU="Yu, Weichao"
  2. AU="Mertens, Anne Wiebke"
  3. AU="Roitershtein, Alexander"
  4. AU="Deppen, Stephen"
  5. AU="Goliath, Rene"
  6. AU="Emons, Günter"
  7. AU="Sarah S. Barnett"

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  1. Artikel: A quick, accurate and general ultra performance liquid chromatography method for evaluating the quality of enological tannins

    Yu WeiChao / Li Zhe / Sun, B. o / Cui, Y. n

    Food Science and Biotechnology

    2020  Band 29, Heft 8, Seite(n) 1045–1052

    Abstract: Thirty enological tannins; Quality evaluation; UPLC; Wines; Linearity. ...

    Körperschaft School of Pharmacy, Shenyang Pharmaceutical University, 110016, Shenyang, China
    Abstract Thirty enological tannins; Quality evaluation; UPLC; Wines; Linearity.
    Sprache Englisch
    Dokumenttyp Artikel
    ZDB-ID 2000008-X
    ISSN 1226-7708
    ISSN 1226-7708
    Datenquelle Viticulture and Enology Abstracts

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  2. Artikel: Nanoconfined Methane Thermodynamic Behavior below Critical Temperature: Liquid–Vapor Coexistence Curve under Wettability Effect

    Sun, Zheng / Huang, Bingxiang / Yan, Shuhui / Wang, Shuolong / Wu, Keliu / Yu, Weichao / Li, Yaohui / Wang, Suran

    Industrial & engineering chemistry process design and development. 2022 Apr. 01, v. 61, no. 14

    2022  

    Abstract: The nanoconfinement effect, induced by strong surface–molecule interactions at the nanoscale, is correlated only to the pore size from a traditional perspective. However, when the pore size is comparable to the molecular diameter, the impact of surface ... ...

    Abstract The nanoconfinement effect, induced by strong surface–molecule interactions at the nanoscale, is correlated only to the pore size from a traditional perspective. However, when the pore size is comparable to the molecular diameter, the impact of surface wettability on the surface–molecule interaction strength cannot be overlooked. In order to bridge the knowledge gap, in this article, the nanoconfinement effect is described as a function of not only pore size shrinkage but also surface wettability. The Peng–Robinson equation of state is modified by adding a fluid–surface attraction term, incorporating the shift of critical properties induced by surface affinity. Particularly, the wettability effect is described as a function of contact angle, an easily accessed macroscopic parameter, facilitating the model application. Reliability of this research is verified against shifted fluid critical properties, collected from existing reports, focusing on fluid behavior in graphite or mica nanopores. The results show that (a) reduction of methane critical temperature takes place when methane molecules are confined in hydrocarbon-wet nanopores; (b) both the enhancement of surface affinity and decline of pore size will result in the shrinkage of the methane liquid–vapor coexistence curve; and (c) the phase diagram of nanoconfined methane suggests an upward trend, attributed to the shifted critical properties. In this article, the wettability effect on nanoconfined methane behavior is revealed, expecting to enrich the theoretical background about methane behavior inside nanopores.
    Schlagwörter contact angle ; equations ; graphene ; methane ; mica ; nanopores ; physical phases ; porosity ; process design ; shrinkage ; temperature ; thermodynamics ; wettability
    Sprache Englisch
    Erscheinungsverlauf 2022-0401
    Umfang p. 4971-4979.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 1484436-9
    ISSN 1520-5045 ; 0888-5885
    ISSN (online) 1520-5045
    ISSN 0888-5885
    DOI 10.1021/acs.iecr.2c00079
    Datenquelle NAL Katalog (AGRICOLA)

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  3. Artikel ; Online: Effect of tannin addition on chromatic characteristics, sensory qualities and antioxidant activities of red wines.

    Li, Lingxi / Li, Zhe / Wei, Zongmin / Yu, Weichao / Cui, Yan

    RSC advances

    2020  Band 10, Heft 12, Seite(n) 7108–7117

    Abstract: Tannin addition as an enological practice has been widely used in the winemaking process because of their ability of improving the aroma and sensory characteristics and stabilizing of color of red wine. In this study, hydrolysable, condensed tannins and ... ...

    Abstract Tannin addition as an enological practice has been widely used in the winemaking process because of their ability of improving the aroma and sensory characteristics and stabilizing of color of red wine. In this study, hydrolysable, condensed tannins and their mixtures in different ratios were added into two Merlot wines to investigate their effect on the wine overall quality. The contents of 15 phenolic compounds were detected by HPLC-DAD, CIELAB color parameters were measured using a chromatic aberration meter, sensory evaluation was accomplished using the assessment standards established by the American Wine Association, and antioxidant activities were analyzed using DPPH and ABTS radical tests. The results indicated that adding tannins affected phenolic composition, contents and color of wine. The specific effects varied by tannins. Furthermore, tannin addition, especially the mixed tannins, improved the sensory qualities and antioxidant activities greatly. The mixed tannins added with a ratio of 1 : 1 between hydrolyzable and condensed tannins exhibited a better effect on both sensory qualities and antioxidant activities, and it could be recommended as an ideal tannin addition for wine quality improvement.
    Sprache Englisch
    Erscheinungsdatum 2020-02-17
    Erscheinungsland England
    Dokumenttyp Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/c9ra09846a
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Buch ; Online: Geometric magnonics with chiral magnetic domain walls

    Lan, Jin / Yu, Weichao / Xiao, Jiang

    2020  

    Abstract: Spin wave, the collective excitation of magnetic order, is one of the fundamental angular momentum carriers in magnetic systems. Understanding the spin wave propagation in magnetic textures lies in the heart of developing pure magnetic information ... ...

    Abstract Spin wave, the collective excitation of magnetic order, is one of the fundamental angular momentum carriers in magnetic systems. Understanding the spin wave propagation in magnetic textures lies in the heart of developing pure magnetic information processing schemes. Here we show that the spin wave propagation across a chiral domain wall follows simple geometric trajectories, similar to the geometric optics. And the geometric behaviors are qualitatively different in normally magnetized film and tangentially magnetized film. We identify the lateral shift, refraction, and total reflection of spin wave across a ferromagnetic domain wall. Moreover, these geometric scattering phenomena become polarization-dependent in antiferromagnets, indicating the emergence of spin wave birefringence inside antiferromagnetic domain wall.

    Comment: 9 pages, 5 figures
    Schlagwörter Condensed Matter - Materials Science ; Condensed Matter - Mesoscale and Nanoscale Physics
    Thema/Rubrik (Code) 535
    Erscheinungsdatum 2020-12-17
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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  5. Buch ; Online: Experimental generation of circulating cavity magnon polaritons

    Bourhill, Jeremy / Yu, Weichao / Vlaminck, Vincent / Bauer, Gerrit E. W. / Ruoso, Giueseppe / Castel, Vincent

    2022  

    Abstract: We experimentally realize circularly polarised unidirectional cavity magnon polaritons in a torus-shaped microwave cavity loaded by a small magnetic sphere. At special positions the clockwise and counterclockwise modes are circularly polarized, such that ...

    Abstract We experimentally realize circularly polarised unidirectional cavity magnon polaritons in a torus-shaped microwave cavity loaded by a small magnetic sphere. At special positions the clockwise and counterclockwise modes are circularly polarized, such that only one of them couples to the magnet, which breaks the mode degeneracy. We reveal the chiral nature of the spectral energy and angular momentum flow by observing and modelling non-reciprocities of the microwave scattering matrix.

    Comment: 7 pages, 7 figures
    Schlagwörter Condensed Matter - Materials Science
    Erscheinungsdatum 2022-08-29
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel ; Online: Prediction of Attractive Level Crossing via a Dissipative Mode.

    Yu, Weichao / Wang, Jiongjie / Yuan, H Y / Xiao, Jiang

    Physical review letters

    2019  Band 123, Heft 22, Seite(n) 227201

    Abstract: The new field of spin cavitronics focuses on the interaction between the magnon excitation of a magnetic element and the electromagnetic wave in a microwave cavity. In the strong interaction regime, such an interaction usually gives rise to the level ... ...

    Abstract The new field of spin cavitronics focuses on the interaction between the magnon excitation of a magnetic element and the electromagnetic wave in a microwave cavity. In the strong interaction regime, such an interaction usually gives rise to the level anticrossing for the magnonic and the electromagnetic mode. Recently, the attractive level crossing has been observed, and it is explained by a non-Hermitian model Hamiltonian. However, the mechanism of such attractive coupling is still unclear. We reveal the secret by using a simple model with two harmonic oscillators coupled to a third oscillator with large dissipation. We further identify this dissipative third party as the invisible cavity mode with large leakage in cavity-magnon experiments. This understanding enables one to design dissipative coupling in all sorts of coupled systems.
    Sprache Englisch
    Erscheinungsdatum 2019-12-23
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.123.227201
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Antiferromagnetic domain wall as spin wave polarizer and retarder.

    Lan, Jin / Yu, Weichao / Xiao, Jiang

    Nature communications

    2017  Band 8, Heft 1, Seite(n) 178

    Abstract: As a collective quasiparticle excitation of the magnetic order in magnetic materials, spin wave, or magnon when quantized, can propagate in both conducting and insulating materials. Like the manipulation of its optical counterpart, the ability to ... ...

    Abstract As a collective quasiparticle excitation of the magnetic order in magnetic materials, spin wave, or magnon when quantized, can propagate in both conducting and insulating materials. Like the manipulation of its optical counterpart, the ability to manipulate spin wave polarization is not only important but also fundamental for magnonics. With only one type of magnetic lattice, ferromagnets can only accommodate the right-handed circularly polarized spin wave modes, which leaves no freedom for polarization manipulation. In contrast, antiferromagnets, with two opposite magnetic sublattices, have both left and right-circular polarizations, and all linear and elliptical polarizations. Here we demonstrate theoretically and confirm by micromagnetic simulations that, in the presence of Dzyaloshinskii-Moriya interaction, an antiferromagnetic domain wall acts naturally as a spin wave polarizer or a spin wave retarder (waveplate). Our findings provide extremely simple yet flexible routes toward magnonic information processing by harnessing the polarization degree of freedom of spin wave.Spin waves are promising candidates as carriers for energy-efficient information processing, but they have not yet been fully explored application wise. Here the authors theoretically demonstrate that antiferromagnetic domain walls are naturally spin wave polarizers and retarders, two key components of magnonic devices.
    Sprache Englisch
    Erscheinungsdatum 2017--02
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2041-1723
    ISSN (online) 2041-1723
    DOI 10.1038/s41467-017-00265-5
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel: Wall sticking inhibition of high water cut crude oil (below pour point) by underwater superoleophobic PA-FC modification

    Li, Ang / Zhu, Mengqi / Hao, Pengfei / Wu, Haihao / Gong, Jing / Wang, Kun / Yu, Weichao / Feng, Yaorong

    Colloids and surfaces. 2020 Dec. 20, v. 607

    2020  

    Abstract: To inhibit wall sticking during gathering of high water cut crude oil, based on the deposition characteristics of the complexes by reaction of phytic acid (PA) with ferric chloride (FC), a simple and environmentally friendly method for carbon steel plate ...

    Abstract To inhibit wall sticking during gathering of high water cut crude oil, based on the deposition characteristics of the complexes by reaction of phytic acid (PA) with ferric chloride (FC), a simple and environmentally friendly method for carbon steel plate modification was adopted in this study. The effects of reaction time, FC concentration, and deposition times on surface wettability and morphology were investigated. It appeared in the results that the wettability of the surface no longer changed after 1 min of reaction. After two times of deposition, the carbon steel exhibited superhydrophilicity in air and superoleophobicity under water, and more pronounced nano-structures were observed. Comparing with similar works, no electroplating, heating and other devices are required during the entire coating process. Moreover, for the sake of clearly explaining the mechanism of wettability conversion during PA-FC modification, the theory of surface energy and adhesion work were used to quantitatively calculate the adhesion strength of oil droplet on solid surfaces. It was found that the hydrophilization and underwater oleophobicization of materials were essentially a process of increasing the polar component of surface energies, and the opposite adhesion state of oil in air and under water was demonstrated theoretically. Finally, the anti-sticking ability at low temperatures of treated carbon steel was evaluated experimentally. The PA-FC coating showed good oil gel prevention performance below the pour point of crude oil. In conclusion, the wall sticking prevention method proposed in our work provides another way for flow assurance of the transportation of high water cut crude oil.
    Schlagwörter adhesion ; air ; carbon ; coatings ; droplets ; electroplating ; energy ; ferric chloride ; gels ; heat ; hydrophilicity ; nanomaterials ; oils ; petroleum ; phytic acid ; pour point ; steel ; sustainable technology ; temperature ; wettability
    Sprache Englisch
    Erscheinungsverlauf 2020-1220
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    ZDB-ID 1500517-3
    ISSN 0927-7757
    ISSN 0927-7757
    DOI 10.1016/j.colsurfa.2020.125427
    Datenquelle NAL Katalog (AGRICOLA)

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  9. Artikel: Gas supply reliability assessment of natural gas transmission pipeline systems

    Yu, Weichao / Jing Gong / Kai Wen / Shangfei Song / Weihe Huang / Yichen Li / Yuan Min

    Energy. 2018 Nov. 01, v. 162

    2018  

    Abstract: The uncertainty of market demand and dynamic behaviour of the pipeline system are usually ignored in previous gas supply reliability assessments. With the intent of overcoming these deficiencies, a novel methodology to assess the gas supply reliability ... ...

    Abstract The uncertainty of market demand and dynamic behaviour of the pipeline system are usually ignored in previous gas supply reliability assessments. With the intent of overcoming these deficiencies, a novel methodology to assess the gas supply reliability of natural gas transmission pipeline systems is proposed in this paper. Considering both gas supply capacity and market demand uncertainties, calculations of these two items are integrated into a single Monte Carlo simulation. On each Monte Carlo trial, the hydraulic analysis of unsteady flow is combined with the state transition process simulation to calculate the gas supply capacity. In terms of market demand, the load duration curve technology is employed to predict the amount of demand. Then, the indicator proposed to quantify gas supply reliability is calculated on each trial. Finally, the average gas supply reliability is obtained based on N Monte Carlo trials. Applications of this methodology are demonstrated through a real transmission pipeline system. Thereafter, the method is compared with previous approaches and differences are discussed. Furthermore, the impacts of supply capacity and market demand uncertainties on the gas supply reliability are investigated and suggestions to improve the gas supply reliability are proposed.
    Schlagwörter Monte Carlo method ; natural gas ; supply balance ; transient flow ; uncertainty
    Sprache Englisch
    Erscheinungsverlauf 2018-1101
    Umfang p. 853-870.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ZDB-ID 2019804-8
    ISSN 0360-5442 ; 0360-5442
    ISSN (online) 0360-5442
    ISSN 0360-5442
    DOI 10.1016/j.energy.2018.08.039
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  10. Artikel ; Online: Distinguishing artificial spin ice states using magnetoresistance effect for neuromorphic computing.

    Hu, Wenjie / Zhang, Zefeng / Liao, Yanghui / Li, Qiang / Shi, Yang / Zhang, Huanyu / Zhang, Xumeng / Niu, Chang / Wu, Yu / Yu, Weichao / Zhou, Xiaodong / Guo, Hangwen / Wang, Wenbin / Xiao, Jiang / Yin, Lifeng / Liu, Qi / Shen, Jian

    Nature communications

    2023  Band 14, Heft 1, Seite(n) 2562

    Abstract: Artificial spin ice (ASI) consisting patterned array of nano-magnets with frustrated dipolar interactions offers an excellent platform to study frustrated physics using direct imaging methods. Moreover, ASI often hosts a large number of nearly ... ...

    Abstract Artificial spin ice (ASI) consisting patterned array of nano-magnets with frustrated dipolar interactions offers an excellent platform to study frustrated physics using direct imaging methods. Moreover, ASI often hosts a large number of nearly degenerated and non-volatile spin states that can be used for multi-bit data storage and neuromorphic computing. The realization of the device potential of ASI, however, critically relies on the capability of transport characterization of ASI, which has not been demonstrated so far. Using a tri-axial ASI system as the model system, we demonstrate that transport measurements can be used to distinguish the different spin states of the ASI system. Specifically, by fabricating a tri-layer structure consisting a permalloy base layer, a Cu spacer layer and the tri-axial ASI layer, we clearly resolve different spin states in the tri-axial ASI system using lateral transport measurements. We have further demonstrated that the tri-axial ASI system has all necessary required properties for reservoir computing, including rich spin configurations to store input signals, nonlinear response to input signals, and fading memory effect. The successful transport characterization of ASI opens up the prospect for novel device applications of ASI in multi-bit data storage and neuromorphic computing.
    Sprache Englisch
    Erscheinungsdatum 2023-05-04
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-38286-y
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