MaterialsChemistryMaterialsChemistry15TheHayashigroup,incollaborationwithTeshimaandZettsugroups,hasresearchedfabricationoffunctionalinorganiccrystalsbyutilizingvarioustechniquesincludingfluxgrowthmethod,andsolvothermalandammnothermalmethods.Especially,ourresearchfocusesonrecoveryofusefulresourcesandremovaloftoxicionsfromaqueoussolutionsusinginorganicionexchangers.Wearealwaysinterestedinfundamentalissuesandproblemsinthefieldsofenergyandenvironmentalscience.Fumitaka HayashiCelluloseisproducedbysomekindsofbacteriaaswellasplants.Itiscalledasbacterialcelluloseormicrobialcellulose,andisusedforvariousindustrialpurposes.Inourlaboratory,wefocusonthefunctionoftheproteincomplexparticipatingincellulosebiosynthesis,whichbehaveslikeafiberspinningmachine.Itistoosmallthisproteincomplexbymicroscope.ThuswearetryingtostudyitsstructurebyX-raycrystallographicanalysisattheatomiclevel.Masahiro MizunoOurtargetistodevelopfunctionalmaterialsrangingfromnanosheetstosinglecrystalsandtoapplytoionsieves,electrodes,andquantumcomputerdevices.Researchissuesareselectiveuptakeoflithiumionfromlakeandseawater,removalofradioactiveandtoxicmetalionsfromwastes,andevaluationofnuclearspinpropertyof19F-dopedapatite.Wemakeainternationalteamtopursuesuchfieldsofstudy.Ourteamisequippedwithvariouscharacterizationsinstruments(seerightfigure),andourgroupmemberswillhaveexcellentopportunitiesformasteringnewexperimentalskills.Graduateswillplayanactiveroleasresearchers/engineersinvariousfieldsrelevanttoenvironmentalpurification,energyconversion,andelectronics.Thewidthofcellulosefibrilextrudedfromasingleproteincomplexisabout1.5nm.thesecellulosefibersarebundledtoformcellulosefibers(10-100nm)basedon?thearrayofproteincomplexonthecellsurfaceandthemovementofbacterium.Ifthearrayofproteincomplexcanbecontrolled,itmightbepossibletomakeacellulosenanofiberwithavarietyofthicknessandlength.MoststudentsstayatShinshuUniversityfortheirgraduatestudies.Othersfindjobsinmanufacturingcompaniesinvariousfieldssuchaschemistry,electronics,andfood.Innature,Photographs of (Left) UV/Vis Raman spectroscopy instruments and (Right) Hall measurement system. Students can master various kinds of characterization techniques.TEM image of cellulose producing bacterium (left), and SEM image of bacteria cellulose (right).Crystals(0.2mm)(left)andthree-dimensionalstructure(right)oftheproteincomposingthecellulosespinningmachine.Assistant ProfessorHe completed doctoral degree in Tokyo Institute of Technology, and started to work as an assistant professor in ShinshuUniv. in 2015. Associate Professor2005: Ph.Dfrom Tokyo University of Agriculture and Technology2017-: Associate Professor of Faculty of Engineering, Shinshu UniversityX-ray crystallography of carbohydrate related enzymes.Ion exchange siteK2TiSi3O95 μm5 μm1D Tunnel Structure2D Layered StructureTiO6Ion exchangesiteNa2Ti3O7 3D Cage StructureLiO6Octahedron3 μm(Top) Crystal structures of inorganic ion exchangers with 1-, 2-, and 3-dimensional nanostructures. (Bottom) FE-SEM images of K2TiSi3O9, Na2Ti3O7, and LiMn2O4.LiO4TetrahedronLiMn2O4 In the FutureAfter GraduationtoobservethestructureofIn the FutureAfter GraduationBacterial Cellulose Nanofiber-Amazing World of Fiber Spinning by Bacteria -Aqua-Innovative Materials for Resource Recovery and Environmental Purification
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