Skip to main content Accessibility help

Electrical Characterization of Thin Single Crystals of Sexithiophene

  • C. Daniel Frisbie (a1), Eric L. Granstrom (a1) and Michael J. Loiacono (a1)


Extremely thin, single crystals of sexithiophene (6T), 2–14 nm thick and 2–5 μm in length and width, can be grown an flat gold substrates by thermal evaporation. The thickness dimension corresponds to 1–6 monolayers (ML) of 6T molecules arranged with their long axes nearly perpendicular to the substrate. We have measured the current-voltage (I-V) characteristics through the thickness of these crystallites, after doping them with iodine, using conducting probe atomic force microscopy (CPAFM). The I-V traces are linear in the ±50 mV regime. The conductance (I/V) of the doped 6T crystals does not decrease monotonically with increasing thickness as might be expected, but instead has a maximum at 3 ML thickness, and we discuss several possible explanations for this observation.



Hide All
1. (a) Torsi, L.; Dodabalapur, A.; Rothberg, L. J.; Fung, A. W. P.; Katz, H. E. Science 1996, 272, 1462. (b) Lovinger, A. J.; Rothberg, L. J. J. Mater. Res. 1996, 11, 1581. (c) Dodabalapur, A.; Katz, H. E.; Torsi, L.; Haddon, R. C. Science 1995, 269, 1560. (d) Dodabalapur, A.; Torsi, L.; Katz, H. E. Science 1995, 268, 270. (e) Lovinger, A. J.; Davis, D. D.; Ruel, R.; Torsi, L.; Dodabalapur, A.; Katz, H. E. J.Mater. Res. 1995, 10, 2958. (d) Horowitz, G.; Bachet, B.; Yassar, A.; Lang, P.; Demanze, F.; Fave, J.- L.; Gamier, F. Chem. Mater. 1995, 7, 1337. (e) Garnier, F.; Hajlaoui, R.; Yassar, A.; Srivastava, P. Science 1994, 265, 1684. (f) Garnier, F.; Yassar, A.; Hajlaoui, R.; Horowitz, G.; Deloffre, F. Electrochimica Acta, 1994, 39, 1339. (g) Garnier, F.; Yassar, A.; Hajlaoui, R.; Horowitz, G.; Deloffre, F.; Servet, B.; Ries, S.; Alnot, P. J. Am. Chem. Soc. 1993, 115, 8716. (h) Horowitz, G.; Peng, X.; Fichou, D.; Gamier, F. J. Appl. Phys. 1990, 67, 528. (i) Horowitz, G.; Fichou, D.; Peng, X.; Xu, Z.; Gamier, F. Sol. State. Comm. 1989, 72, 381.
2. Loiacono, M. J.; Granstrom, E. L; Frisbie, C. D. J. Phys. Chem. B, to be published (1998).
3. Dai, H.; Wong, E. W.; Lieber, C. M. Science 1996, 272, 523.
4. (a) Hegner, M.; Wagner, P.; Semenza, G. Surf. Sci. 1993, 291, 39. (b) Wagner, P.; Hegner, M.; Guntherodt, H. J.; Semenza, G. Langmuir 1995,11, 3867.
5. (a) Garnier, F.; Kouki, F.; Hajlaoui, R.; Horowitz, G. MRS Bulletin June, 1997, 52. (b) Parker, I. D. J. Appl. Phys. 1994, 75, 1656.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed