?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F33670%2F&rft.title=Chirality+and+Semiconducting-Enriched+Single-Walled+Carbon+Nanotubes+and+their+Applications+in+Chemical+Sensing+and+Memory+Devices&rft.creator=Chido%2C+Michael&rft.description=Single-walled+carbon+nanotubes+(SWCNTs)+have+shown+true+promise+as+highly+sensitive+chemical+sensors+and+high-performance+electronic+devices.+Only+recently%2C+methods+have+been+developed+to+further+purify+and+separate+nanotubes+by+their+electronic+properties%2C+metallic+or+semiconducting%2C+and+even+by+type+as+individual+chiralities.+These+developments+have+opened+up+possibilities+to+further+improve+and+understand+the+properties+of+SWCNTs+on+a+fundamental+level.+In+this+work%2C+the+exquisite+properties+of+chirality-enriched+and+semiconducting-enriched+SWCNTs+(s-SWCNTs)+have+been+explored+for+applications+as+chemical+sensors+and+memory+storage+devices.+In+the+first+project%2C+column+chromatography+was+used+to+separate+and+enrich+specific+SWNCT+chiralities.+Using+the+product+from+this+process%2C+it+was+found+that+the+sensor+response+of+chirality-enriched+(7%2C5)+SWCNT+field-effect+transistors+(FETs)+to+monosubstituted+benzenes+show+a+linear+relationship+with+the+Hammett+parameter+of+the+species+tested%2C+as+was+previously+found+for+SWCNT+mixtures.+In+a+second+project%2C+we+explored+the+properties+of+poly(oxacyclobutane)+(POCB)+and+its+crystallization+with+water+at+room+temperature+to+form+a+polymer+hydrate+crystal+structure.+This+polycrystalline+material+was+found+to+have+aligned+1D+columns+of+water+contained+within+its+structure+and+we+found+that+the+material+can+be+capacitively+charged.+The+crystallization+of+the+polymer+and+water+was+observed+with+electronic+measurement+by+s-SWCNT+FET+devices+as+a+large+increase+in+capacitance+was+observed+upon+crystallization.+These+POCB-coated+s-SWCNT+devices+were+applied+as+memory+cell+devices+and+showed+bit+separation+of+10%5E4.+In+the+final+project%2C+metal+nanoparticle+decorated+s-SWCNT+devices+were+applied+as+gas+sensors+in+a+proof+of+concept+experiment+using+the+AC+heterodyne+measurement+technique.+We+showed+that+even+in+the+presence+of+large+charge+transfer%2C+such+as+hydrogen+binding+to+palladium+nanoparticles+on+the+surface+of+SWCNTs%2C+there+is+no+signal+with+the+AC+method+as+opposed+to+the+large+signal+observed+in+traditional+DC+FET+measurement.+Hydrogen+sulfide+elicited+a+sensor+response+in+both+AC+and+DC+techniques+as+was+expected.&rft.date=2018-01-29&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F33670%2F1%2Fchidomt_etd2017_1.pdf&rft.identifier=++Chido%2C+Michael++(2018)+Chirality+and+Semiconducting-Enriched+Single-Walled+Carbon+Nanotubes+and+their+Applications+in+Chemical+Sensing+and+Memory+Devices.++Master's+Thesis%2C+University+of+Pittsburgh.++++(Unpublished)++