The electric transport properties of flexible and transparent conducting bilayers, realized by sputtering ultrathin gold nanometric layers on sodium–alginate free-standing films, were studied. The reported results cover a range of temperatures from 3 to 300 K. In the case of gold layer thicknesses larger than 5 nm, a typical metallic behavior was observed. Conversely, for a gold thickness of 4.5 nm, an unusual resistance temperature dependence was found. The dominant transport mechanism below 70 K was identified as a fluctuation-induced tunneling process. This indicates that the conductive region is not continuous but is formed by gold clusters embedded in the polymeric matrix. Above 70 K, instead, the data can be interpreted using a phenomenological model, which assumes an anomalous expansion of the conductive region upon decreasing the temperature, in the range from 300 to 200 K. The approach herein adopted, complemented with other characterizations, can provide useful information for the development of innovative and green optoelectronics.

Electric transport in gold-covered sodium–alginate freestanding foils / Barone, C.; Bertoldo, M.; Capelli, R.; Dinelli, F.; Maccagnani, P.; Martucciello, N.; Mauro, C.; Pagano, S.. - In: NANOMATERIALS. - ISSN 2079-4991. - 11:3(2021), pp. 1-9. [10.3390/nano11030565]

Electric transport in gold-covered sodium–alginate freestanding foils

Barone C.;Capelli R.;Mauro C.;Pagano S.
2021

Abstract

The electric transport properties of flexible and transparent conducting bilayers, realized by sputtering ultrathin gold nanometric layers on sodium–alginate free-standing films, were studied. The reported results cover a range of temperatures from 3 to 300 K. In the case of gold layer thicknesses larger than 5 nm, a typical metallic behavior was observed. Conversely, for a gold thickness of 4.5 nm, an unusual resistance temperature dependence was found. The dominant transport mechanism below 70 K was identified as a fluctuation-induced tunneling process. This indicates that the conductive region is not continuous but is formed by gold clusters embedded in the polymeric matrix. Above 70 K, instead, the data can be interpreted using a phenomenological model, which assumes an anomalous expansion of the conductive region upon decreasing the temperature, in the range from 300 to 200 K. The approach herein adopted, complemented with other characterizations, can provide useful information for the development of innovative and green optoelectronics.
2021
11
3
1
9
Electric transport in gold-covered sodium–alginate freestanding foils / Barone, C.; Bertoldo, M.; Capelli, R.; Dinelli, F.; Maccagnani, P.; Martucciello, N.; Mauro, C.; Pagano, S.. - In: NANOMATERIALS. - ISSN 2079-4991. - 11:3(2021), pp. 1-9. [10.3390/nano11030565]
Barone, C.; Bertoldo, M.; Capelli, R.; Dinelli, F.; Maccagnani, P.; Martucciello, N.; Mauro, C.; Pagano, S.
File in questo prodotto:
File Dimensione Formato  
nanomaterials-11-00565.pdf

Open access

Descrizione: Articolo principale
Tipologia: Versione pubblicata dall'editore
Dimensione 1.02 MB
Formato Adobe PDF
1.02 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1237603
Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 4
social impact