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First Measurement of A=4 Hypernuclei and Antihypernuclei at the LHC

Physical Review Letters 2025年第16期134卷 162301-162301页

作者： S. Acharya A. Agarwal G. Aglieri Rinella L. Aglietta M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov V. Akishina M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt A. R. Altamura I. Altsybeev J. R. Alvarado C. O. R. Alvarez M. N. Anaam C. Andrei N. Andreou A. Andronic E. Andronov V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck D. Averyanov M. D. Azmi H. Baba A. Badalà J. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung R. Bala A. Balbino A. Baldisseri B. Balis Z. Banoo V. Barbasova F. Barile L. Barioglio M. Barlou B. Barman G. G. Barnaföldi L. S. Barnby E. Barreau V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova L. G. E. Beltran Y. A. V. Beltran G. Bencedi A. Bensaoula S. Beole Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin B. Bhattacharjee L. Bianchi J. Bielčík J. Bielčíková A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova J. Bok L. Boldizsár M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno V. D. Buchakchiev M. D. Buckland D. Budnikov H. Buesching S. Bufalino P. Buhler N. Burmasov Z. Buthelezi A. Bylinkin S. A. Bysiak J. C. Cabanillas Noris M. F. T. Cabrera M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo S. L. Cantway M. Carabas A. A. Carballo F. Carnesecchi R. Caron L. A. D. Carvalho J. Castillo Castellanos M. Castoldi F. Catalano S. Cattaruzzi R. Cerri I. Chakaberia P. Chakraborty S. Chandra S. Cha Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento di Fisica dell’Università and Sezione INFN Turin Italy Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico University of Houston Houston Texas USA Sungkyunkwan University Suwon City Republic of Korea Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany INFN Sezione di Bari Bari Italy Physik Department Technische Universität München Munich Germany High Energy Physics Group Universidad Autónoma de Puebla Puebla Mexico Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania University of Derby Derby United Kingdom Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy INFN Sezione di Bologna Bologna Italy Lawrence Berkeley National Laboratory Berkeley California USA SUBATECH I

In this Letter, the first evidence of the He¯Λ¯4 antihypernucleus is presented, along with the first measurement at the LHC of the production of (anti)hypernuclei with mass number A=4, specifically (anti)HΛ4 and (anti)HeΛ4. In addition, the antiparticle-to-particle ratios for both hypernuclei (H¯Λ¯4/HΛ4 and He¯Λ¯4/HeΛ4) are shown, which are sensitive to the baryochemical potential of the strongly interacting matter created in heavy-ion collisions. The results are obtained from a data sample of central Pb-Pb collisions, collected during the 2018 LHC data taking at a center-of-mass energy per nucleon pair of sNN=5.02 TeV. The yields measured for the average of the charge-conjugated states are found to be [0.78±0.19(stat)±0.17(syst)]×10−6 for the (anti)HΛ4 and [1.08±0.34(stat)±0.20(syst)]×10−6 for the (anti)HeΛ4, and the measured antiparticle-to-particle ratios are in agreement with unity. The presence of (anti)HΛ4 and (anti)HeΛ4 excited states is expected to strongly enhance the production yield of these hypernuclei. The yield values exhibit a combined deviation of 3.3σ from the theoretical ground-state-only expectation, while the inclusion of the excited states in the calculations leads to an agreement within 0.6σ with the present measurements. Additionally, the measured (anti)HΛ4 and (anti)HeΛ4 masses are compatible with the world-average values within the uncertainties.

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Cover Feature: Synthesis and Photophysical Properties of Hexabenzocoronene-Tetrabenzoporphyrin Architectures (Eur. J. Org. Chem. 40/2020)

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European Journal of Organic Chemistry 2020年第40期2020卷

作者： Michael Ruppel Lampros-Pascal Gazetas Dr. Dominik Lungerich Dr. Norbert Jux Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander University Erlangen-Nuremberg Nikolaus-Fiebiger-Str. 10 91058 Erlangen Germany Institute for Basic Science (IBS) 50 Yonsei-ro Seodaemun-gu Center for Nanomedicine 03722 Seoul Republic of Korea Graduate Program of Nano Biomedical Engineering (NanoBME) Advanced Science Institute Yonsei University 03722 Seoul Republic of Korea

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Effect of graphene addition on the transport critical current density of bulk (Tl 0.85 Cr 0.15 ) Sr 2 CaCu 2 O 7-δ superconductor

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materials Today: Proceedings 2018年第1期5卷 3176-3184页

作者： Wei Kong Ing Kong Mohd Mustafa Awang Kechik Roslan Abd-Shukor Applied Science and Foundation Studies Infrastructure University Kuala Lumpur Unipark Suria Jalan Ikram-Uniten 43000 Kajang Selangor Malaysia Department of Mechanical Engineering Materials and Manufacturing Engineering The University of Nottingham Malaysia Jalan Broga 43500 Semenyih Selangor Malaysia Department of Physics Faculty of Science Universiti Putra Malaysia 43400 Serdang Selangor Malaysia School of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia

In this work, the effect of graphene addition on the transport critical current density of (Tl 0.85 Cr 0.15 ) Sr 2 CaCu 2 O 7-δ (Tl-1212) superconductor was investigated. Thallium-based high temperature superconductor (HTS) with nominal starting composition (Tl 0.85 Cr 0.15 ) Sr 2 CaCu 2 O 7-δ was prepared using high purity oxide powders via solid state reaction method. 0.001 – 0.005 wt.% of graphene were added into Tl-1212 superconductors. The characteristic of the samples were determined by powder X-ray diffraction method, scanning electron microscopy (SEM), energy dispersive X-Ray analysis (EDX), electrical resistance measurements and transport critical current density measurements. The zero-resistance temperature, T c-zero was found to decrease from 95 K to 84 K with the increase of graphene. The temperature dependence transport critical current density ( J c ) of the pure and graphene added bulk samples were investigated. J c of the non-added bulk sample was 1320 mA/cm 2 at 30 K while the J c of sample with 0.001 wt.% graphene was 3660 mA/cm 2 at 30 K. Results showed that the J c of the Tl-1212 samples decreased with increasing graphene addition. Graphene acted as impurity which is believed to perform the flux pinning effect to Tl-1212. Thus, the J c of Tl-1212 superconductors was enhanced. The phase formation and morphology of samples Tl-1212 were also discussed in this paper.

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Dispersion forces in inhomogeneous planarly layered media: A one-dimensional model for effective polarizabilities

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Physical Review A 2019年第6期99卷 062512-062512页

作者： Johannes Fiedler Fabian Spallek Priyadarshini Thiyam Clas Persson Mathias Boström Michael Walter Stefan Yoshi Buhmann Physikalisches Institut Albert-Ludwigs-Universität Freiburg Hermann-Herder-Strasse 3 D-79104 Freiburg im Breisgau Germany Centre for Materials Science and Nanotechnology Department of Physics University of Oslo P.O. Box 1048 Blindern NO-0316 Oslo Norway Division of Theoretical Chemistry Lund University P.O. Box S-22100 Lund Sweden Department of Energy and Process Engineering Norwegian University of Science and Technology NO-7491 Trondheim Norway FIT Freiburg Centre for Interactive Materials and Bioinspired Technologies Georges-Köhler-Allee 105 79110 Freiburg Germany Fraunhofer IWM Wöhlerstrasse 11 D-79108 Freiburg i. Br. Germany Freiburg Institute for Advanced Studies Albert-Ludwigs-Universität Freiburg Albertstr. 19 D-79104 Freiburg Germany

Dispersion forces such as van der Waals forces between two microscopic particles, the Casimir-Polder forces between a particle and a macroscopic object, or the Casimir force between two dielectric objects are well studied in vacuum. However, in realistic situations the interacting objects are often embedded in an environmental medium. Such a solvent influences the induced dipole interaction. With the framework of macroscopic quantum electrodynamics, these interactions are mediated via an exchange of virtual photons. Via this method the impact of a homogeneous solvent medium can be expressed as local-field corrections leading to excess polarizabilities which have previously been derived for hard boundary conditions. In order to develop a more realistic description, we investigate a one-dimensional analog system illustrating the influence of a continuous dielectric profile.

关键词： Casimir effect & related phenomena Geometrical & wave optics Light propagation, transmission & absorption Quantum fluctuations & noise Van der Waals interaction

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A Study of Diffusion in Lithium-ion Electrodes under Fast Charging Using Electrochemical Impedance Spectroscopy

A Study of Diffusion in Lithium-ion Electrodes under Fast Ch...

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MRS Advances

作者： Ahmed, Kazi Bell, Jeffrey Ye, Rachel Dong, Bo Li, Yige Ozkan, Cengiz S. Ozkan, Mihrimah Department of Electrical and Computer Engineering University of California Riverside United States Materials Science and Engineering Program University of California Riverside United States Department of Mechanical Engineering University of California Riverside United States

An in-depth look at diffusion mechanics within lithium-ion electrodes under fast charging conditions is presented. Electrochemical impedance spectroscopy is used as the primary technique to investigate lithium diffusion within electrode material and in electrolyte near the electrode-electrolyte interface. Half-cells of silicon are charged under varying galvanostatic rates while obtaining impedance data. Collected data is analyzed with the help of an electrical equivalent circuit model that provides mechanical and electrochemical parameters for each instance. The novelty of this equivalent circuit partly lies in its ability to resolve between solid-phase diffusion and liquid-phase diffusion, both of which occur during cycling of a lithium-ion electrode. Observed patterns in the parameters of this circuit provide insight into impact of fast charging on mechanics of lithium diffusion, both inside the electrode matrix and within electrolyte. Copyright © materials Research Society 2017.

关键词： Equivalent circuits

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Correction: Heterogeneous graphitic carbon nitrides in visible-light-initiated organic transformations

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Green Chemistry 2022年第2期24卷 957-957页

作者： Santosh Kumar Verma Rameshwari Verma Yarabahally R. Girish Fan Xue Long Yan Shekhar Verma Monika Singh Yogesh Vaishnav Afzal B. Shaik Richie R. Bhandare Kadalipura P. Rakesh Kothanahally S. Sharath Kumar Kanchugarakoppal S. Rangappa School of Chemistry and Chemical Engineering Yulin University Yulin 719000 Shaanxi P. R. China Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization Yulin University Yulin 719000 P. R. China Department of Studies in Chemistry Manasagangotri University of Mysore Mysore-570006 India University College of Pharmacy Raipur Pt. Deendayal Upadhyay Memorial Health Sciences and Aayush University of Chhattisgarh Raipur 492010 Chhattisgarh India Department of Chemistry Krishna Public School International Nava Raipur 492002 Chhattisgarh India Faculty of Pharmaceutical Sciences Shri Shankaracharya Technical Campus Junwani Bhilai 491001 Chhattisgarh India Department of Pharmaceutical Chemistry Vignan Pharmacy College Jawaharlal Nehru Technological University Vadlamudi 522213 Andhra Pradesh India Department of Pharmaceutical Sciences College of Pharmacy and Health Sciences Center of Medical and Bio-allied Health Sciences Research Ajman University P O Box 346 Ajman United Arab Emirates School of Materials Science and Engineering Gwangju Institute of Science and Technology Gwangju Republic of Korea Institution of Excellence Vijnana Bhavan University of Mysore Manasagangotri Mysuru 570006 India

Correction for ‘Heterogeneous graphitic carbon nitrides in visible-light-initiated organic transformations’ by Santosh Kumar Verma et al., Green Chem., 2022, DOI: 10.1039/d1gc03490a.

Correction for ‘Heterogeneous graphitic carbon nitrides in visible-light-initiated organic transformations’ by Santosh Kumar Verma et al., Green Chem., 2022, DOI: 10.1039/d1gc03490a.

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Precessing jet nozzle connecting to a spinning black hole in M87

arXiv

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arXiv 2023年

作者： Cui, Yuzhu Hada, Kazuhiro Kawashima, Tomohisa Kino, Motoki Lin, Weikang Mizuno, Yosuke Ro, Hyunwook Honma, Mareki Yi, Kunwoo Yu, Jintao Park, Jongho Jiang, Wu Shen, Zhiqiang Kravchenko, Evgeniya Algaba, Juan-Carlos Cheng, Xiaopeng Cho, Ilje Giovannini, Gabriele Giroletti, Marcello Jung, Taehyun Lu, Ru-Sen Niinuma, Kotaro Oh, Junghwan Ohsuga, Ken Sawada-Satoh, Satoko Sohn, Bong Won Takahashi, Hiroyuki R. Takamura, Mieko Tazaki, Fumie Trippe, Sascha Wajima, Kiyoaki Akiyama, Kazunori An, Tao Asada, Keiichi Buttaccio, Salvatore Byun, Do-Young Cui, Lang Hagiwara, Yoshiaki Hirota, Tomoya Hodgson, Jeffrey Kawaguchi, Noriyuki Kim, Jae-Young Lee, Sang-Sung Lee, Jee Won Lee, Jeong Ae Maccaferri, Giuseppe Melis, Andrea Melnikov, Alexey Migoni, Carlo Oh, Se-Jin Sugiyama, Koichiro Wang, Xuezheng Zhang, Yingkang Chen, Zhong Hwang, Ju-Yeon Jung, Dong-Kyu Kim, Hyo-Ryoung Kim, Jeong-Sook Kobayashi, Hideyuki Li, Bin Li, Guanghui Li, Xiaofei Liu, Zhiyong Liu, Qinghui Liu, Xiang Oh, Chung-Sik Oyama, Tomoaki Roh, Duk-Gyoo Wang, Jinqing Wang, Na Wang, Shiqiang Xia, Bo Yan, Hao Yeom, Jae-Hwan Yonekura, Yoshinori Yuan, Jianping Zhang, Hua Zhao, Rongbing Zhong, Weiye Research Center for Intelligent Computing Platforms Zhejiang Laboratory Hangzhou311100 China Tsung-Dao Lee Institute Shanghai Jiao Tong University 520 Shengrong Road Shanghai201210 China Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Mizusawa VLBI Observatory National Astronomical Observatory of Japan 2-12 Hoshigaoka Mizusawa Iwate Oshu023-0861 Japan Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan Kogakuin University of Technology & Engineering Academic Support Center 2665-1 Nakano-machi Hachioji Tokyo192-0015 Japan South-Western Institute For Astronomy Research Yunnan University Kunming650500 China School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Institut für Theoretische Physik Goethe-Universität Frankfurt Max-von-Laue-Straße 1 Frankfurt am MainD-60438 Germany Korea Astronomy & Space Science Institute Daedeokdae-ro 776 Yuseong-gu Daejeon34055 Korea Republic of Department of Astronomy Yonsei University Yonsei-ro 50 Seodaemun-gu Seoul03722 Korea Republic of Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Department of Physics and Astronomy Seoul National University Gwanak-gu Seoul08826 Korea Republic of Department of Information Countermeasure Air Force Early Warning Academy Wuhan430019 China Institute of Astronomy and Astrophysics Academia Sinica HiloHI96720 United States Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Key Laboratory of Radio Astronomy Chinese Academy of Sciences Beijing100101 China Moscow Institute of Physics and Technology Dolgoprudny Institutsky per. 9 Moscow141700 Russia Lebedev Physical Institute The Russian Academy of Sciences Leninsky prospekt 53 Moscow119991 Russia Department of Physics Faculty of Science U

The nearby radio galaxy M87 offers a unique opportunity to explore the connections between the central supermassive black hole and relativistic jets. Previous studies of the inner region of M87 revealed a wide opening angle for the jet originating near the black hole 1–4. The Event Horizon Telescope resolved the central radio source and found an asymmetric ring structure consistent with expectations from General Relativity 5. With a baseline of 17 years of observations, there was a shift in the jet’s transverse position, possibly arising from an eight to ten-year quasi-periodicity 3. However, the origin of this sideways shift remains unclear. Here we report an analysis of radio observations over 22 years that suggests a period of about 11 years in the position angle variation of the jet. We infer that we are seeing a spinning black hole that induces the Lense-Thirring precession of a misaligned accretion disk. Similar jet precession may commonly occur in other active galactic nuclei but has been challenging to detect owing to the small magnitude and long period of the variation. Copyright © 2023, The Authors. All rights reserved.

关键词： Active Galactic Nuclei

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Adsorption of Crystal Violet Dye from Aqueous Solution using Industrial Pepper Seed Spent: Equilibrium, Thermodynamic, and Kinetic studies

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Adsorption science & Technology 2022年 2022卷

作者： Sulthana, Razia Taqui, Syed Noeman Syed, Usman Taqui Khan, T. M. Yunus Khadar, Shaik Dawood Abdul Mokashi, Imran Shahapurkar, Kiran Kalam, M. A. Murthy, H. C. Ananda Syed, Akheel Ahmed 1Department of Studies in ChemistryUniversity of MysoreManasa GangothriMysuru 570006Indiauni-mysore.ac.in 2Department of ChemistrySchool of TechnologyGlocal UniversityDelhi-Yamunotri MargSH-57Mirzapur PoleSaharanpur DistrictUttar Pradesh 247121Indiaglocaluniversity.edu.in 3Centre for Advanced Research and InnovationGlocal UniversityDelhi-Yamunotri MargSH-57Mirzapur PoleSaharanpur DistrictUttar Pradesh 247121Indiaglocaluniversity.edu.in 4LAQV-REQUIMTEDepartment of ChemistryFaculty of Science and TechnologyUniversidade NOVA de Lisboa2829-516 CaparicaPortugalunl.pt 5Mechanical Engineering DepartmentCollege of EngineeringKing Khalid UniversityAbha 61421Saudi Arabiakku.edu.sa 6Industrial Engineering DepartmentCollege of EngineeringKing Khalid UniversityAbha 61421Saudi Arabiakku.edu.sa 7Department of Mechanical EngineeringBearys Institute of Technology (Affiliated to Visvesvaraya Technological University)MangaloreKarnatakaIndiaritindia.edu 8Department of Mechanical EngineeringSchool of MechanicalChemical and Materials EngineeringAdama Science and Technology UniversityAdamaP O Box 1888Ethiopiaastu.edu.et 9School of Civil and Environmental EngineeringFEITUniversity of Technology SydneySydneyNSW 2007Australiauts.edu.au 10Department of Applied ChemistrySchool of Applied Natural ScienceAdama Science and Technology UniversityAdamaP O Box 1888Ethiopiaastu.edu.et 11Department of ProsthodonticsSaveetha Dental College & HospitalSaveetha Institute of Medical and technical science (SIMAT)Saveetha UniversityChennai600077 Tamil *** 3Centre for Advanced Research and InnovationGlocal UniversityDelhi-Yamunotri MargSH-57Mirzapur PoleSaharanpur DistrictUttar Pradesh 247121Indiaglocaluniversity.edu.in

The economic viability of adsorbing crystal violet (CV) using pepper seed spent (PSS) as a biosorbent in an aqueous solution has been studied. A parametrical investigation was conducted considering parameters like initial concentration of dye, time of contact, pH value, and temperature variation. The analysis of experimental data obtained was carried out by evaluating with the isotherms of Freundlich, Sips, Tempkin, Jovanovic, Brouers–Sotolongo, Toth, Vieth–Sladek, Radke–Prausnitz, Langmuir, and Redlich–Peterson. The adsorption kinetics were studied by implementing the Dumwald-Wagner, Weber-Morris, pseudo-first-order, pseudo-second-order, film diffusion, and Avrami models. The experimental value of adsorption capacity () was observed to be quite close to the Jovanovic isotherm adsorption capacity () at (), coefficient of correlation of 0.945. The data validation was found to conform to that of pseudo-second-order and Avrami kinetic models. The adsorption process was specified as a spontaneous and endothermic process owing to the thermodynamic parametrical values of ,, and . The value of is an indicator of the process’s physical nature. The adsorption of CV to the PSS was authenticated from infrared spectroscopy and scanning electron microscopy images. The interactions of the CV-PSS system have been discussed, and the observations noted suggest PSS as a feasible adsorbent to extract CV from an aqueous solution.

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Tricoupled hybrid lattice Boltzmann model for nonisothermal drying of colloidal suspensions in micropore structures

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Physical Review E 2019年第5期99卷 053306-053306页

作者： Feifei Qin Ali Mazloomi Moqaddam Luca Del Carro Qinjun Kang Thomas Brunschwiler Dominique Derome Jan Carmeliet Chair of Building Physics Department of Mechanical and Process Engineering ETH Zürich (Swiss Federal Institute of Technology in Zürich) Zürich 8093 Switzerland Laboratory of Multiscale Studies in Building Physics Empa (Swiss Federal Laboratories for Materials Science and Technology) Dübendorf 8600 Switzerland Smart System Integration IBM Research-Zürich Saumerstrasse 4 8803 Rüschlikon Switzerland Earth and Environment Sciences Division (EES-16) Los Alamos National Laboratory (LANL) Los Alamos New Mexico 87545 USA

A tricoupled hybrid lattice Boltzmann model (LBM) is developed to simulate colloidal liquid evaporation and colloidal particle deposition during the nonisothermal drying of colloidal suspensions in micropore structures. An entropic multiple-relaxation-time multirange pseudopotential two-phase LBM for isothermal interfacial flow is first coupled to an extended temperature equation for simulating nonisothermal liquid drying. Then the coupled model is further coupled with a modified convection diffusion equation to consider the nonisothermal drying of colloidal suspensions. Two drying examples are considered. First, drying of colloidal suspensions in a two-pillar micropore structure is simulated in two dimensions (2D), and the final configuration of colloidal particles is compared with the experimental one. Good agreement is observed. Second, at the temperature of 343.15 K (70∘C), drying of colloidal suspensions in a complex spiral-shaped micropore structure containing 220 pillars is simulated (also in 2D). The drying pattern follows the designed spiral shape due to capillary pumping, i.e., transport of the liquid from larger pores to smaller ones by capillary pressure difference. Since the colloidal particles are passively carried with liquid, they accumulate at the small menisci as drying proceeds. As liquid evaporates at the small menisci, colloidal particles are deposited, eventually forming solid structures between the pillars (primarily), and at the base of the pillars (secondarily). As a result, the particle deposition conforms to the spiral route. Qualitatively, the simulated liquid and particle configurations agree well with the experimental ones during the entire drying process. Quantitatively, the model demonstrates that the evaporation rate and the particle accumulation rate slowly decrease during drying, similar to what is seen in the experimental results, which is due to the reduction of the liquid-vapor interfacial area. In conclusion, the hybrid model s

关键词： Evaporation Fluid-particle interactions Particle-laden flows Colloids Flows in porous media Microfluidics Suspensions Lattice-Boltzmann methods Two-fluid & multi-fluid model

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Mechanical acceleration of capture and detection rate of DNA molecules by motorizing bio-opto-plasmonic microsensors

arXiv

引用

arXiv 2018年

作者： Guo, Jianhe Kim, Kwanoh Vandeventer, Peter Fan, Donglei Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States Defense Threat Reduction Agency Fort BelvoirVA22060 United States

Efficient capture and detection of minute amount of deoxyribonucleic acid (DNA) molecules are pivotal for an array of modern gene technologies which are widely utilized in medical, forensic and defense applications, including DNA extraction, preconcentration, and separation. In this work, we propose a rational mechanism to substantially accelerate the capture and detection efficiency of DNA molecules by actively motorizing designed Raman microsensors. At least 4-fold enhancement has been achieved on the microsensors rotating at 1200 rpm. The process is monitored dynamically and in-situ from the biosilica based microsensors, owing to the ultrasensitivity provided by the opto-plasmonic enhancement. The fundamental working mechanism is investigated systematically, and can be attributed to the Nernst diffusion layer thinning effect induced by mechanical motions. This research initiated a new and reliable approach for remarkably enhancing the capture and detection efficiency of biomolecules, which could make far-reaching impact to biosensing, DNA technologies, and microfluidic Total Analysis Systems. Copyright © 2018, The Authors. All rights reserved.

关键词： Micromotors

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