?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%2F9543%2F&rft.title=CHARGE+TRANSFER+THROUGH+CHIRAL+ORGANIC+AND+PEPTIDE+NUCLEIC+ACID+MOLECULES&rft.creator=Paul%2C+Amit&rft.description=CHARGE+TRANSFER+THROUGH+CHIRAL+ORGANIC+AND+PEPTIDE+NUCLEIC+ACID+MOLECULESAmit+Paul%2C+PhDUniversity+of+Pittsburgh%2C+2008AbstractThe+quest+for+miniaturization+of+electronic+devices+has+caused+a+surge+in+research+to+find+bottom-up+alternatives+for+electronic+circuit+design+and+from+this+need%2C+molecular+electronics+has+emerged+as+a+new+field+of+study.+For+the+development+of+%22molecular-wire%22%2C+it+is+very+important+to+understand+the+flow+of+charge+through+molecular+bridge+systems+that+can+be+used+to+manipulate+the+flow+of+charge+through+these+systems.+Charge+transfer+(CT)+through+chiral+organic+molecules+has+been+investigated+by+photoelectrochemistry+through+chiral+molecular+bridges.+The+study+showed+that+the+charge+transfer+through+a+chiral+molecular+bridge+has+a+preference+for+circularly+polarized+light+whose+sense+of+rotation+is+either+left+or+right.+CT+study+through+single+stranded+(ss)+and+double+stranded+(ds)+peptide+nucleic+acid+(PNA)+films+have+been+performed+also.+CT+studies+through+PNA+films+show+that+at+short+distance+the+CT+exponentially+falls+of+with+increasing+distance%2C+which+is+consistent+with+a+super-exchange+mediated+tunneling+mechanism%2C+but+at+longer+distance+the+decay+is+shallow%2C+indicating+that+the+CT+follows+a+different+mechanism+called+%22hopping%22+mechanism.+The+experimentally+determined+mechanism+switchover+point+from+tunneling+to+hopping+has+been+found+to+be+in+good+agreement+with+a+tight-binding+model+proposed+earlier.+Further%2C+it+has+been+found+that+CT+through+PNA+is+primarily+controlled+by+nucleobases+and+CT+can+be+manipulated+by+changing+nucleobase+or+nucleobase+pair+sequence.&rft.date=2009-01-28&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%2F9543%2F1%2Famitpaulphd.pdf&rft.identifier=++Paul%2C+Amit++(2009)+CHARGE+TRANSFER+THROUGH+CHIRAL+ORGANIC+AND+PEPTIDE+NUCLEIC+ACID+MOLECULES.++Doctoral+Dissertation%2C+University+of+Pittsburgh.++++(Unpublished)++