title: Biomolecular electronic devices based on self-organized deoxyguanosine nanocrystals.
abstract: We report on a new class of hybrid electronic devices based on a DNA nucleoside (deoxyguanosine lipophilic derivative) whose assembled polymeric ribbons interconnect a submicron metallic gate. The device exhibits large conductivity at room temperature, rectifying behavior and strong current-voltage hysteresis. The transport mechanism through the molecules is investigated by comparing films with different self-assembling morphology. We found that the main transport mechanism is connected to pi-pi interactions between guanosine molecules and to the formation of a strong dipole along ribbons, consistently with the results of our first-principles calculations.
authors.affiliation: National Nanotechnology Laboratory, Istituto Nazionale per la Fisica della Materia and Dipartimento di Ingegneria dell'Innovazione, Università di Lecce, Via Arnesano, 73100 Lecce, Italy. ross.rinaldi@unile.it
authors.forename: Ross
authors.initials: R
authors.lastname: Rinaldi
authors.forename: Emanuela
authors.initials: E
authors.lastname: Branca
authors.forename: Roberto
authors.initials: R
authors.lastname: Cingolani
authors.forename: Rosa
authors.initials: R
authors.lastname: Di Felice
authors.forename: Arrigo
authors.initials: A
authors.lastname: Calzolari
authors.forename: Elisa
authors.initials: E
authors.lastname: Molinari
authors.forename: Salvatore
authors.initials: S
authors.lastname: Masiero
authors.forename: Gianpero
authors.initials: G
authors.lastname: Spada
authors.forename: Giovanni
authors.initials: G
authors.lastname: Gottarelli
authors.forename: Anna
authors.initials: A
authors.lastname: Garbesi
mesh_terms: D003460:Crystallization; D004247:DNA / Q000737:chemistry*; D003849:Deoxyguanosine / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008958:Models, Molecular; D008962:Models, Theoretical; D036103:Nanotechnology / Q000379:methods*
chemical_list: D004247:DNA; D003849:Deoxyguanosine