2026-04-29T12:02:30Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/111042025-11-27T01:05:24Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Electron Transport in Two-Dimensional Arrays of Gold Nanocrystals Investigated by Scanning Electrochemical Microscopy Liljeroth, Peter Vanmaekelbergh, Daniël Ruiz Fernández, Virginia Kontturi, Kyösti Jiang, Hua Kauppinen, Esko I. Quinn, Bernadette M. Electrical conductivity Monolayers Nanoparticles Redox reactions Thin films Nanotecnología Electroquímica Nanotechnology Electrochemistry This article reports the use of the scanning electrochemical microscope (SECM) to investigate the electronic properties of Langmuir monolayers of alkane thiol protected gold nanocrystals (NCs). A substantial increase in monolayer conductivity upon mechanical compression of the Au NC monolayer is reported for the first time. This may be the room temperature signature of the insulator to metal transition previously reported for comparable silver NC monolayers. Factors influencing the conductivity of the monolayer NC array are discussed. This work was funded by the National Technology Agency, Finland, the Academy of Finland, and the EU under the Sixth Framework Program “SUSANA” (EU TMR network “Supramolecular Self-Assembly of Interfacial Nanostructures”, Contract No. HPRN-CT-2002-00185). We are grateful to James Heath and Kristen Beverly for making the values of conductivity for Ag NC monolayers available. 2025-11-26T08:18:53Z 2025-11-26T08:18:53Z 2004-06 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 0002-7863 https://hdl.handle.net/10259/11104 10.1021/ja0493188 1520-5126 eng Journal of the American Chemical Society. 2004, V. 126, n. 22, p. 7126–7132 https://doi.org/10.1021/ja0493188 info:eu-repo/semantics/openAccess application/pdf American Chemical Society