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First Observation of an Attractive Interaction between a Proton and a Cascade Baryon

physical Review Letters 2019年第11期123卷 112002-112002页

作者： S. Acharya D. Adamová S. P. Adhya A. Adler J. Adolfsson M. M. Aggarwal G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn S. Aiola A. Akindinov M. Al-Turany S. N. Alam D. S. D. Albuquerque D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali Y. Ali A. Alici A. Alkin J. Alme T. Alt L. Altenkamper I. Altsybeev M. N. Anaam C. Andrei D. Andreou H. A. Andrews A. Andronic M. Angeletti V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli R. Anwar N. Apadula L. Aphecetche H. Appelshäuser S. Arcelli R. Arnaldi M. Arratia I. C. Arsene M. Arslandok A. Augustinus R. Averbeck S. Aziz M. D. Azmi A. Badalà Y. W. Baek S. Bagnasco R. Bailhache R. Bala A. Baldisseri M. Ball R. C. Baral R. Barbera L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth E. Bartsch F. Baruffaldi N. Bastid S. Basu G. Batigne B. Batyunya P. C. Batzing D. Bauri J. L. Bazo Alba I. G. Bearden C. Bedda N. K. Behera I. Belikov F. Bellini R. Bellwied V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov D. Berenyi R. A. Bertens D. Berzano L. Betev A. Bhasin I. R. Bhat H. Bhatt B. Bhattacharjee A. Bianchi L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. Bilandzic G. Biro R. Biswas S. Biswas J. T. Blair D. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár A. Bolozdynya M. Bombara G. Bonomi M. Bonora H. Borel A. Borissov M. Borri H. Bossi E. Botta C. Bourjau L. Bratrud P. Braun-Munzinger M. Bregant T. A. Broker M. Broz E. J. Brucken E. Bruna G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino O. Bugnon P. Buhler P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton D. Caffarri A. Caliva E. Calvo Villar R. S. Camacho P. Camerini A. A. Capon F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. R. Casula F. Catalano C. Ceballos Sanchez P. Chakraborty S. Chandra B. Chang W. Chang S. Chapeland M. Chartier S. Chattopadhyay A. Chauvin C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato S. Cho P. Chochula T. Chowdhury P. Christakoglou C. H. Christensen P. Christiansen T. Chujo C. Variable Energy Cyclotron Centre Homi Bhabha National Institute Nuclear Physics Institute of the Czech Academy of Sciences Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik Fachbereich Informatik und Mathematik Lund University Department of Physics Division of Particle Physics Physics Department Panjab University European Organization for Nuclear Research (CERN) Dipartimento DISAT del Politecnico and Sezione INFN Centro Fermi—Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi’ Department of Physics Aligarh Muslim University Korea Institute of Science and Technology Information Yale University Institute for Theoretical and Experimental Physics Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Universidade Estadual de Campinas (UNICAMP) National Research Centre Kurchatov Institute INFN Sezione di Torino Central China Normal University Instituto de Física Universidad Nacional Autónoma de México COMSATS University Islamabad INFN Sezione di Bologna Dipartimento di Fisica e Astronomia dell’Università Sezione INFN Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Department of Physics and Technology University of Bergen Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt St. Petersburg State University Horia Hulubei National Institute of Physics and Nuclear Engineering School of Physics and Astronomy University of Birmingham Westfälische Wilhelms-Universität Münster Institut für Kernphysik Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Creighton University Rudjer Bošković Institute INFN Sezione di Padova University of Houston Lawrence Berkeley National Laboratory SUBATECH IMT Atlantique Université de Nantes CNRS-IN2P3 Department of Physics University of Oslo Institut de Physique Nucléaire d’Orsay (IPNO) Institut National de Physique Nucléaire et de Physique des Particules (IN2P3/CNRS) Université de Paris-Sud Université Paris-Saclay INFN Sezione

This Letter presents the first experimental observation of the attractive strong interaction between a proton and a multistrange baryon (hyperon) Ξ−. The result is extracted from two-particle correlations of combined p−Ξ−⊕p¯−Ξ¯+ pairs measured in p−Pb collisions at sNN=5.02 TeV at the LHC with ALICE. The measured correlation function is compared with the prediction obtained assuming only an attractive Coulomb interaction and a standard deviation in the range [3.6, 5.3] is found. Since the measured p−Ξ−⊕p¯−Ξ¯+ correlation is significantly enhanced with respect to the Coulomb prediction, the presence of an additional, strong, attractive interaction is evident. The data are compatible with recent lattice calculations by the HAL-QCD Collaboration, with a standard deviation in the range [1.8, 3.7]. The lattice potential predicts a shallow repulsive Ξ− interaction within pure neutron matter and this implies stiffer equations of state for neutron-rich matter including hyperons. Implications of the strong interaction for the modeling of neutron stars are discussed.

关键词： Particle interactions

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AETA 2015: Recent advances in electrical engineering and relatedsciences

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International Conference on Advanced engineering Theory and Applications, AETA 2015

作者： Duy, Vo Hoang Dao, Tran Trong Zelinka, Ivan Choi, Hyeung-Sik Chadli, Mohammed Ton Duc Thang University Ho Chi Minh City Viet Nam Electrical Engineering and Computer Science VŠB-Technical University Ostrava Poruba Czech Republic Division of Mechanical Korea Maritime and Ocean University Busan Korea Republic of Université de Picardie Jules Verne Laboratoire MIS Amiens France

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Electronic structure of the dilute magnetic semiconductor Ga1-xMnxP from hard X-ray photoelectron spectroscopy and hard X-ray angle-resolved photoemission

arXiv

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arXiv 2018年

作者： Keqi, A. Gehlmann, M. Conti, G. Nemšák, S. Rattanachata, A. Minár, J. Plucinski, L. Rault, J.E. Rueff, J.P. Scarpulla, M. Hategan, M. Pálsson, G.K. Conlon, C. Eiteneer, D. Saw, A.Y. Gray, A.X. Kobayashi, K. Ueda, S. Dubon, O.D. Schneider, C.M. Fadley, C.S. Department of Physics University of California Davis DavisCA95616 United States Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Peter-Grünberg-Institut PGI-6 Forschungszentrum Jülich Jülich52425 Germany New Technologies-Research Center University of West Bohemia Pilsen306 14 Czech Republic Synchrotron SOLEIL Saint-Aubin91192 France Department of Material Science and Engineering University of California Berkeley BerkeleyCA94720 United States Department of Electrical and Computer Engineering University of Utah Salt Lake CityUT84112 United States Department of Physics Uppsala University UppsalaSE-751 20 Sweden Department of Physics Temple University PhiladelphiaPA19122 United States Japan Atomic Energy Agency 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo679-5148 Japan 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo679-5148 Japan Research Center for Advanced Measurement and Characterization NIMS 1-2-1 Sengen TsukubaIbaraki305-0047 Japan

We have investigated the electronic structure of the dilute magnetic semiconductor (DMS) Ga0.98Mn0.02P and compared it to that of an undoped GaP reference sample, using hard X-ray photoelectron spectroscopy (HXPS) and hard X-ray angle-resolved photoemission spectroscopy (HARPES) at energies of about 3 keV. We present experimental data, as well as theoretical calculations, in order to understand the role of the Mn dopant in the emergence of ferromagnetism in this material. Both core-level spectra and angle-resolved or angle-integrated valence spectra are discussed. In particular, the HARPES experimental data are compared to free-electron final-state model calculations and to more accurate one-step photoemission theory. The experimental results show differences between Ga0.98Mn0.02P and GaP in both angle-resolved and angle-integrated valence spectra. The Ga0.98Mn0.02P bands are broadened due to the presence of Mn impurities that disturb the long-range translational order of the host GaP crystal. Mn-induced changes of the electronic structure are observed over the entire valence band range, including the presence of a distinct impurity band close to the valence-band maximum of the DMS. These experimental results are in good agreement with the one-step photoemission calculations, and a prior HARPES study of Ga0.97Mn0.03As and GaAs (Gray et al. Nature Materials 11, 957 (2012)), demonstrating the strong similarity between these two materials. The Mn 2p and 3s core-level spectra also reveal an essentially identical state in doping both GaAs and GaP. Copyright © 2018, The Authors. All rights reserved.

关键词： III-V semiconductors

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Stable switching of resistive random access memory on the nanotip array electrodes

Stable switching of resistive random access memory on the na...

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Device Research Conference

作者： Kun-Tong Tsai Chih-Hsiang Ho Wen-Yuan Chang Jr-Jian Ke Elif Selin Mungan Yuh-Lin Wang Jr-Hau He Computer Electrical and Mathematical Sciences and Engineering (CEMSE) Division King Abdullah University of Science & Technology (KAUST) Thuwal Saudi Arabia Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan Department of Electrical and Computer Engineering Purdue University West Lafayette IN USA

ISBN: (纸本)9781509028290

We have demonstrated that ZnO resistive memory with a nanostructured substrate has great potential in improving ReRAM's RS characteristics. The electric field concentrated on nanotip structures is believed to play a crucial role for lowering V f and V set . The uniformity of the nanostructures is also important for the optimization of device performance, as well as improving the switching uniformity and reliability. Combining with the fact that fabrication process has low-cost merit with excellent stability and scalability, the nanotip array is highly attractive for cost-effective ReRAM applications and for the device miniaturization.

关键词： Switches Electrodes Substrates Electric fields Fabrication Resistance STEM

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Deep convolutional neural networks for detecting secondary structures in protein density maps from cryo-electron microscopy

Deep convolutional neural networks for detecting secondary s...

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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Rongjian Li Dong Si Tao Zeng Shuiwang Ji Jing He Department of Computer Science Old Dominion University Norfolk Virginia Division of Computing and Software Systems University of Washington Bothell Bothell WA School of Electrical Engineering and Computer Science Washington State University Pullman WA

ISBN: (纸本)9781509016129

The detection of secondary structure of proteins using three dimensional (3D) cryo-electron microscopy (cryo-EM) images is still a challenging task when the spatial resolution of cryo-EM images is at medium level (5-10Å). Prior researches focused on the usage of local features that may not capture the global information of image objects. In this study, we propose to use deep learning methods to extract high representative global features and then automatically detect secondary structures of proteins. In particular, we build a convolutional neural network (CNN) classifier that predicts the probability of label for every individual voxel in 3D cryo-EM image with respect to the secondary structure elements of proteins such as α-helix, β-sheet and background. To effectively incorporate the 3D spatial information in protein structures, we propose to perform 3D convolutions in the convolutional layers of CNNs. We show that the proposed CNN classifier can outperform existing SVM method on identifying the secondary structure elements of proteins from 3D cryo-EM medium resolution images.

关键词： Proteins Convolution Image resolution Three-dimensional displays Deconvolution Protein engineering Computational modeling

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ϒ suppression at forward rapidity in Pb–Pb collisions at s_NN=5.02TeV

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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 2019年 790卷 89-101页

作者： Acharya, S. Acosta, F.T. Adamová, D. Adolfsson, J. Aggarwal, M.M. Aglieri Rinella, G. Agnello, M. Agrawal, N. Ahammed, Z. Ahn, S.U. Aiola, S. Akindinov, A. Al-Turany, M. Alam, S.N. Albuquerque, D.S.D. Aleksandrov, D. Alessandro, B. Alfaro Molina, R. Ali, Y. Alici, A. Alkin, A. Alme, J. Alt, T. Altenkamper, L. Altsybeev, I. Anaam, M.N. Andrei, C. Andreou, D. Andrews, H.A. Andronic, A. Angeletti, M. Anguelov, V. Anson, C. Antičić, T. Antinori, F. Antonioli, P. Anwar, R. Apadula, N. Aphecetche, L. Appelshäuser, H. Arcelli, S. Arnaldi, R. Arnold, O.W. Arsene, I.C. Arslandok, M. Audurier, B. Augustinus, A. Averbeck, R. Azmi, M.D. Badalà, A. Baek, Y.W. Bagnasco, S. Bailhache, R. Bala, R. Baldisseri, A. Ball, M. Baral, R.C. Barbano, A.M. Barbera, R. Barile, F. Barioglio, L. Barnaföldi, G.G. Barnby, L.S. Barret, V. Bartalini, P. Barth, K. Bartsch, E. Bastid, N. Basu, S. Batigne, G. Batyunya, B. Batzing, P.C. Bazo Alba, J.L. Bearden, I.G. Beck, H. Bedda, C. Behera, N.K. Belikov, I. Bellini, F. Bello Martinez, H. Bellwied, R. Beltran, L.G.E. Belyaev, V. Bencedi, G. Beole, S. Bercuci, A. Berdnikov, Y. Berenyi, D. Bertens, R.A. Berzano, D. Betev, L. Bhaduri, P.P. Bhasin, A. Bhat, I.R. Bhatt, H. Bhattacharjee, B. Bhom, J. Bianchi, A. Bianchi, L. Bianchi, N. Bielčík, J. Bielčíková, J. Bilandzic, A. Biro, G. Biswas, R. Biswas, S. Blair, J.T. Blau, D. Blume, C. Boca, G. Bock, F. Bogdanov, A. Boldizsár, L. Bombara, M. Bonomi, G. Bonora, M. Borel, H. Borissov, A. Borri, M. Botta, E. Bourjau, C. Bratrud, L. Braun-Munzinger, P. Bregant, M. Broker, T.A. Broz, M. Brucken, E.J. Bruna, E. Bruno, G.E. Budnikov, D. Buesching, H. Bufalino, S. Buhler, P. Buncic, P. Busch, O. Buthelezi, Z. Butt, J.B. Buxton, J.T. Cabala, J. Caffarri, D. Caines, H. Caliva, A. Calvo Villar, E. Camacho, R.S. Camerini, P. Capon, A.A. Carena, F. Carena, W. Carnesecchi, F. Castillo Castellanos, J. Castro, A.J. Casula, E.A.R. Ceballos Sanchez, C. Chandra, S. Chang, B. Chang, W. Chapeland, S. Chartier, M. Chattopadhyay, S. Chauvin, A. Cheshkov, C. Cheynis, B. Chiban A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation Yerevan Armenia Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Bose Institute Department of Physics Centre for Astroparticle Physics and Space Science (CAPSS) Kolkata India Budker Institute for Nuclear Physics Novosibirsk Russian Federation California Polytechnic State University San Luis Obispo CA United States Central China Normal University Wuhan China Centre de Calcul de l'IN2P3 Villeurbanne Lyon France Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN) Havana Cuba Centro de Investigación y de Estudios Avanzados (CINVESTAV) Mexico City and Mérida Mexico Centro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche ‘Enrico Fermi’ Rome Italy Chicago State University Chicago IL United States China Institute of Atomic Energy Beijing China Chonbuk National University Jeonju South Korea Comenius University Bratislava Faculty of Mathematics Physics and Informatics Bratislava Slovakia COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Creighton University Omaha NE United States Department of Physics Aligarh Muslim University Aligarh India Department of Physics Pusan National University Pusan South Korea Department of Physics Sejong University Seoul South Korea Department of Physics University of California Berkeley CA United States Department of Physics University of Oslo Oslo Norway Department of Physics and Technology University of Bergen Bergen Norway Dipartimento di Fisica dell'Università ‘La Sapienza’ Sezione INFN Rome Italy Dipartimento di Fisica dell'Università Sezione INFN Cagliari Italy Dipartimento di Fisica dell'Università Sezione INFN Trieste Italy Dipartimento di Fisica dell'Università Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell'Università Sezione INFN Bologna Italy Dipartimento di Fisica e Astronomia dell'Università Sezione INFN Catani

Inclusive ϒ(1S) and ϒ(2S) production have been measured in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair sNN=5.02 TeV, using the ALICE detector at the CERN LHC. The ϒ mesons are reconstructe...

Inclusive ϒ(1S) and ϒ(2S) production have been measured in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair s_NN=5.02 TeV, using the ALICE detector at the CERN LHC. The ϒ mesons are reconstructed in the centre-of-mass rapidity interval 2.5T<15 GeV/c, via their decays to muon pairs. In this Letter, we present results on the inclusive ϒ(1S) nuclear modification factor R_AA as a function of collision centrality, transverse momentum and rapidity. The ϒ(1S) and ϒ(2S) R_AA, integrated over the centrality range 0–90%, are 0.37±0.02(stat)±0.03(syst) and 0.10±0.04(stat)±0.02(syst), respectively, leading to a ratio R_AA ^ϒ(2S)/R_AA ^ϒ(1S) of 0.28±0.12(stat)±0.06(syst). The observed ϒ(1S) suppression increases with the centrality of the collision and no significant variation is observed as a function of transverse momentum and rapidity. © 2018

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Compliant substrate epitaxy: Au on MoS2

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physical Review B 2016年第5期93卷 054106-054106页

作者： Yuzhi Zhou Daisuke Kiriya E. E. Haller Joel W. Ager, III Ali Javey D. C. Chrzan Department of Materials Science and Engineering University of California Berkeley California 94720 USA Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Electrical Engineering and Computer Sciences University of California Berkeley California 94720 USA

A theory for the epitaxial growth of Au on MoS2 is developed and analyzed. The theory combines continuum linear elasticity theory with density functional theory to analyze epitaxial growth in this system. It is demonstrated that if one accounts for interfacial energies and strains, the presence of misfit dislocations, and the compliance of the MoS2 substrate, the experimentally observed growth orientation is favored despite the fact that it represents a larger elastic mismatch than two competing structures. The stability of the experimentally preferred orientation is attributed to the formation of a large number of strong Au-S bonds, and it is noted that this strong bond may serve as a means to exfoliate and transfer large single layers sheets of MoS2, as well as to engineer strain within single layers of MoS2. The potential for using a van der Waals-bonded layered material as a compliant substrate for applications in 2D electronic devices and epitaxial thin film growth is discussed.

关键词： Elasticity Growth Thin films Transition metals Density functional calculations Epitaxy

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Publisher Correction: Direct observation of the dead-cone effect in quantum chromodynamics

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Nature 2022年第7920期607卷 E22页

作者： S. Acharya Z. Ahammed P. P. Bhaduri S. Chandra S. Chattopadhyay A. K. Dubey P. Ghosh D. Kumar S. Muhuri P. Pareek S. K. Saha J. Saini N. Sarkar V. K. Singh V. Singhal S. Thakur D. Adamova J. Bielˇcikova A. Isakov A. Kotliarov F. Krizek S. Kushpil M. Šumbera A. Adler T. Janson U. Kebschull J. Adolfsson S. Basu P. Christiansen O. Matonoha A. F. Nassirpour A. Ohlson A. Oskarsson T. Richert O. V. Rueda D. Silvermyr G. Aglieri Rinella A. Alkin M. Angeletti A. Augustinus K. Barth F. Bellini L. Betev P. M. Bond F. Carnesecchi S. Chapeland V. Chibante Barroso P. Chochula M. Colocci F. Costa A. Di Mauro R. Divia G. Eulisse G. Fiorenza U. Fuchs C. Gargiulo C. Grigoras F. Grosa J. F. Grosse-Oetringhaus J. A. Hasenbichler H. Hillemanns P. Hristov J. P. Iddon G. M. Innocenti N. Jacazio J. M. Jowett A. Junique A. Kalweit M. Keil J. Klein A. Kluge P. J. Konopka V. Kuˇcera S. Kundu M. Lamanna K. Lapidus E. Laudi L. Lautner M. Lettrich M. Mager P. Martinengo A. L. Mazuecos M. Mazzilli A. Morsch T. Mrnjavac L. Musa R. N. Patra O. Pinazza M. Puccio F. Reidt W. Riegler D. Rohr J. Schukraft R. Shahoyan G. Simonetti M. Suljic A. Tauro A. Telesca S. Trogolo P. Vande Vyvre B. Volkel B. von Haller A. Wegrzynek S. C. Wenzel C. Zampolli N. Zardoshti M. Agnello A. Balbino S. Bufalino F. Catalano P. Fecchio S. Politano N. Agrawal P. Antonioli F. Cindolo G. Clai D. Hatzifotiadou A. Margotti R. Nania F. Noferini R. Preghenella S. Tripathy S. Ahmad B. Ali C. Anuj M. D. Azmi S. Khan A. Khatun M. Mohisin Khan S. U. Ahn I. Ahuja M. Bombara A. Kravˇcakova Z. Rescakova M. Vala J. Vrlakova Z. Akbar S. Sumowidagdo A. Akindinov S. Kiselev D. Mal’Kevich K. Mikhaylov S. Shirinkin R. Sultanov K. Voloshin N. Zhigareva M. Al-Turany R. Averbeck X. Bai M. B. Blidaru P. Braun-Munzinger A. Caliva M. R. Ciupek A. Dubla P. Foka C. Garabatos P. Gasik P. Giubellino R. Grosso M. K. Habib A. Harlenderova S. Hornung M. Ivanov T. Kollegger L. Kreis C. Lippmann P. Malzacher A. Marin S. Masciocchi D. Mi´skowiec C. Schmidt K. Schwarz K. Schweda I. Selyuzhenkov J. Wilkinso Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Saha Institute of Nuclear Physics Homi Bhabha National Institute Kolkata India Nuclear Physics Institute of the Czech Academy of Sciences Řežu Prahy Czech Republic Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague Prague Czech Republic Institut fur Informatik Fachbereich Informatik und Mathematik Johann-Wolfgang-Goethe Universitat Frankfurt Frankfurt Germany Department of Physics Division of Particle Physics Lund University Lund Sweden Niels Bohr Institute University of Copenhagen Copenhagen Denmark European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento di Fisica e Astronomia dell’Universita and Sezione INFN Bologna Italy Politecnico di Bari and Sezione INFN Bari Italy INFN Sezione di Torino Turin Italy University of Liverpool Liverpool UK Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum fur Schwerionenforschung GmbH Darmstadt Germany AGH University of Science and Technology Cracow Poland National Institute of Science Education and Research Homi Bhabha National Institute Jatni India Physik Department Technische Universitat Munchen Munich Germany Physics Department University of Jammu Jammu India INFN Sezione di Bologna Bologna Italy Dipartimento di Fisica e Astronomia dell’Universita and Sezione INFN Padova Italy Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Instituto de Ciencias Nucleares Universidad Nacional Autonoma de Mexico Mexico City Mexico Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafarik University Košice Slovakia Indonesian Institute of Sciences Jakarta Indonesia NRC≫Kurchatov ≫ Institute – ITEP Moscow Russia Joint Institute for Nuclear Research (JINR) Dubna Russia University of Science and Technology of China Hefei China Nikh

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Molecular‐Barrier‐Enhanced Aromatic Fluorophores in Cocrystals with Unity Quantum Efficiency

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Angewandte Chemie 2018年第7期130卷

作者： Huanqing Ye Guangfeng Liu Sheng Liu David Casanova Xin Ye Xutang Tao Qichun Zhang Qihua Xiong Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Singapore IKERBASQUE—Basque Foundation for Science 48013 Bilbao Euskadi Spain Donostia International Physics Center (DIPC) & Kimika Fakultatea Euskal Herriko Unibertsitatea (UPV/EHU) Paseo Manuel Lardiazabal 4 20018 Donostia Euskadi Spain State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 P. R. China Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore Singapore NOVITAS Nanoelectronics Center of Excellence School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore Singapore MajuLab CNRS-UNS-NUS-NTU International Joint Research Unit UMI 3654 Singapore Singapore

Singlet–triplet conversion in organic light‐emitting materials introduces non‐emissive (dark) and long‐lived triplet states, which represents a significant challenge in constraining the optical properties. There have been considerable attempts at separating singlets and triplets in long‐chain polymers, scavenging triplets, and quenching triplets with heavy metals; nonetheless, such triplet‐induced loss cannot be fully eliminated. Herein, a new strategy of crafting a periodic molecular barrier into the π‐conjugated matrices of organic aromatic fluorophores is reported. The molecular barriers effectively block the singlet‐to‐triplet pathway, resulting in near‐unity photoluminescence quantum efficiency (PLQE) of the organic fluorophores. The transient optical spectroscopy measurements confirm the absence of the triplet absorption. These studies provide a general approach to preventing the formation of dark triplet states in organic semiconductors and bring new opportunities for the development of advanced organic optics and photonics.

关键词： Kokristalle Photolumineszenz Photophysik Zeitauflösende Spektroskopie

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Affordable dual-sensing proximity sensor for touchless interactive systems

Affordable dual-sensing proximity sensor for touchless inter...

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Device Research Conference

作者： Joanna M. Nassar Marlon C. Diaz Muhammad M. Hussain Integrated Nanotechnology Lab (INL) and Integrated Disruptive Electronic Applications (IDEA) Lab Computer Electrical Mathematical Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia

ISBN: (纸本)9781509028290

We report an ultra-low cost flexible proximity sensor using only off-the-shelf recyclable materials such as aluminum foil, napkin and double-sided tape. Unlike previous reports, our device structure exhibits two sensing capabilities in one platform, with outstanding long detection range of 20 cm and pressure sensitivity of 0.05 kPa -1 . This is the first ever demonstration of a low-cost, accessible, and batch manufacturing process for pressure and proximity sensing on a singular platform. The mechanical flexibility of the sensor makes it possible to mount on various irregular platforms, which is vital in many areas, such as robotics, machine automation, vehicular technology and inspection tools.

关键词： Robot sensing systems Sensitivity Capacitance Aluminum Fabrication

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