Biomolecular electronic devices based on self-organized deoxyguanosine nanocrystals.
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.
Rinaldi
Ross
R
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
Branca
Emanuela
E
Cingolani
Roberto
R
Di Felice
Rosa
R
Calzolari
Arrigo
A
Molinari
Elisa
E
Masiero
Salvatore
S
Spada
Gianpero
G
Gottarelli
Giovanni
G
Garbesi
Anna
A
D003460:Crystallization; D004247:DNA / Q000737:chemistry*; D003849:Deoxyguanosine / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008958:Models, Molecular; D008962:Models, Theoretical; D036103:Nanotechnology / Q000379:methods*
D004247:DNA; D003849:Deoxyguanosine