A metal-semiconductor-metal (MSM) photodetector has been fabricated using as the semiconductor, a self-assembled layer of a DNA basis, namely a deoxyguanosine derivative, deposited between two gold electrodes. These were defined lithographically on a SiO2substrate, separated by a distance of about 120 nm. The resulting self-assembled guanosine crystal has been deposited in such a way to achieve striking semiconducting properties. We show that with these conditions, the I-V characteristics are independent of the crystal orientation. The device shows a high current response (differential resistance at room temperature ranges in MΩ) which is symmetric with respect to bias sign and dependent on the illumination conditions. This behavior can be explained by taking into account the standard MSM theory and its applications as a photodetector. © 2001 American Institute of Physics.

Photodetectors fabricated from a self-assembly of a deoxyguanosine derivative / Rinaldi R.; Branca E.; Cingolani R.; Masiero S.; Spada G.P.; Gottarelli G.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 78:22(2001), pp. 3541-3543. [10.1063/1.1374232]

Photodetectors fabricated from a self-assembly of a deoxyguanosine derivative

Masiero S.;Spada G. P.;Gottarelli G.
2001

Abstract

A metal-semiconductor-metal (MSM) photodetector has been fabricated using as the semiconductor, a self-assembled layer of a DNA basis, namely a deoxyguanosine derivative, deposited between two gold electrodes. These were defined lithographically on a SiO2substrate, separated by a distance of about 120 nm. The resulting self-assembled guanosine crystal has been deposited in such a way to achieve striking semiconducting properties. We show that with these conditions, the I-V characteristics are independent of the crystal orientation. The device shows a high current response (differential resistance at room temperature ranges in MΩ) which is symmetric with respect to bias sign and dependent on the illumination conditions. This behavior can be explained by taking into account the standard MSM theory and its applications as a photodetector. © 2001 American Institute of Physics.
2001
Photodetectors fabricated from a self-assembly of a deoxyguanosine derivative / Rinaldi R.; Branca E.; Cingolani R.; Masiero S.; Spada G.P.; Gottarelli G.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 78:22(2001), pp. 3541-3543. [10.1063/1.1374232]
Rinaldi R.; Branca E.; Cingolani R.; Masiero S.; Spada G.P.; Gottarelli G.
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/959984
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 81
  • ???jsp.display-item.citation.isi??? ND
social impact