2020-2022 YAMAGATA UNIVERSITY Research Seeds Collection
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dππ =3.8Å14Yamagata University Graduate School of Organic Materials ScienceResearch InterestSoft MaterialsE-mail ・ sathish@yz.yamagata-u.ac.jpTel ・ +81-238-26-3056Fax ・ +81-238-26-3411ContentContent:Thesefunctionalorganicmaterialsareusednotassinglemolecules These functional organic materials are used not as single butasaggregatesofmoleculesinbulkstates,suchasthinfilmsandmolecules but as aggregates of molecules in bulk states, crystals.However,therelationshipbetweentheirstructureatthesuch as thin films and crystals. However, the relationship molecularlevelandtheirfunctionasbulkmaterialsiscurrentlyoftenbetween their structure at the molecular level and their unpredictable.Incontrasttothetheoriesforthesolidstatephysicsoffunction as bulk materials is currently often unpredictable. In inorganicsemiconductors,thephysicsofmolecularaggregates,contrast to the theories for the solid state physics of inorganic semiconductors, the physics of molecular especiallyfortheirelectronicandopticalproperties,stillremainsaggregates, especially for their electronic and optical poorlyunderstoodandunexplored.WeareinterestedinMaterialsproperties, still remains poorly understood and unexplored. SciencetounlockthefullpotentialoforganicmoleculesbytheWe are interested in Materials Science to unlock the full strategicuseofmolecularassembiliesrealizinghigh-performancepotential of organic molecules by the strategic use of organicsemiconductordevices.molecular assembilies realizing high-performance organic semiconductor devices. Appealingpoint:1.Developmentofhigh-performanceorganicsemiconductorsSpecial objectives(OSCs)basedonorganicsynthesis,state-of-the-artorganicphotonics,1. Development of high-performance organic semiconductors andDFTcalculations(OSCs) based on organic synthesis, state-of-the-art 2.FabricationoforganicLEDsbasedontheoriginalOSCsrealizingorganic photonics, and DFT calculationslow-power-consumptionandlonglifetimeatpractialhighbrightness2. Fabrication of organic LEDs based on the original OSCs realizing low-power-consumption and long lifetime at practial high brightnessYamagata UniversityGraduate School of Science and Engineering Research Interest :Organic Materials ScienceYamagata University Graduate School of Science and Engineering Research InterestE-mail:h-sasabe@yz.yamagata-u.ac.jpOrganic Materials ScienceTel :+81-238-26-3924E-mail ・ h-sasabe@yz.yamagata-u.ac.jpTel ・ +81-238-26-3924Fax:+81-238-26-3052Fax ・ +81-238-26-3052HP :https://oled.yz.yamagata-u.ac.jp/index.htmlHP・https://oled.yz.yamagata-u.ac.jp/index.html The focus of our group is on flow phenomena in soft materials with an emphasis on the dynamics and rheology of entangled polymers. We use computer simulations and analytical theory with vital input in the form of questions, motivation and reality check from experiments. The work is relevant for improving industrial polymer processing and for solving problems that arise during production. In addition, we are investigating the processing of polymer multilayers by first exploring the shear-induced slip at a polymer/polymer interface and its effect on the adhesion between the immiscible polymer layers. One long term goal of our group is to understand macroscopic flow phenomena from a molecular point of view, i.e., in terms of the individual and collective dynamics of the molecules. Towards this end, we are pursuing a hierarchical approach using various models to span the entire range of length and time scales in polymeric materials. The models include different levels of detail depending on the size and time scale, see figure. Establishing the relationship between the models, we hope to use the hierarchy to improve existing technologies and to design novel materials and processing routes.ThefocusofourgroupisonflowphenomenainsoftmaterialswithContentanemphasisonthedynamicsandrheologyofentangledpolymers.Weusecomputersimulationsandanalyticaltheorywithvitalinputintheformofquestions,motivationandrealitycheckfromexperiments.Theworkisrelevantforimprovingindustrialpolymerprocessingandforsolvingproblemsthatariseduringproduction.Inaddition,weareinvestigatingtheprocessingofpolymermultilayersbyfirstexploringtheshear-inducedslipatapolymer/polymerinterfaceanditseffectontheadhesionbetweentheimmisciblepolymerlayers.Onelongtermgoalofourgroupistounderstandmacroscopicflowphenomenafromamolecularpointofview,i.e.,intermsoftheindividualandcollectivedynamicsofthemolecules.Towardsthisend,wearepursuingahierarchicalapproachusingvariousmodelstospantheentirerangeoflengthandtimescalesinpolymericmaterials.Themodelsincludedifferentlevelsofdetaildependingonthesizeandtimescale,seefigure.Establishingtherelationshipbetweenthemodels,wehopetousethehierarchytoimproveexistingtechnologiesandtodesignnovelmaterialsandprocessingroutes.YamagataUniversityGraduate School of Organic Materials ScienceResearch Interest : Soft MaterialsE-mail :sathish@yz.yamagata-u.ac.jpTel :+81-238-26-3056Fax :+81-238-26-3411Associate Professor Sathish K.SukumaranDynamics and rheology of softmaterialsDynamics and rheology of soft materialsLow-Power-Consumption Organic LEDs and MaterialsUnlocking the Full Potential of Organic Molecules by the Strategic Use of Molecular AssembliesAssociate Professor Hisahiro SasabeAssociate Professor Sathish K. SukumaranUnlocking the Full Potential of Organic Molecules by the Strategic Use of Molecular AssembliesAssociate Professor Hisahiro SasabeCreation of High PerformanceOrganic Semiconductors

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