Formation of gold particles at a functional LB film/gold interface leading to Coulomb blockade phenomena

Burghard, Marko; Philipp, G.; Mueller-Schwanneke, C; Roth, S.

doi:10.1016/s0379-6779(97)04162-3

Cited by 4 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fabrication of junctions incorporating a doped conjugated polymer, such as polythiophene, offers a number of other potential advantages. Compared to metal-organic-semiconductor (or metal) junctions for which an evaporated metal (e.g., Au or Al) is typically used for the electrical top contact, the use of a conducting polymer as the top contact could be particularly attractive, avoiding potential damage to and/or penetration into the organic layer that often results from metal deposition. , Moreover, unlike a metal, the conductivity of these materials can be tuned over a large range either by electrochemical doping or to a lesser extent by the nature of the compensating anion.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Generation of Electronically Conducting Polymer-Based Hybrid Junctions on Modified Si(111) Surfaces

2003

View full text Add to dashboard Cite

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=b0d0d3ef-f5a7-4f33-9baa-56285c529743 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=b0d0d3ef-f5a7-4f33-9baa-56285c529743 The modification of Si(111) surfaces with Si-C linked alkyl monolayers terminated by electrochemically polymerizable di(2-thienyl)carbinol moieties has been investigated by different spectroscopic techniques including IR spectroscopy, X-ray photoelectron spectroscopy (XPS), and high-resolution electron energy loss spectroscopy (HREELS). These surfaces were prepared from the photochemical reaction of ethyl undecylenate with hydrogen-terminated Si(111), followed by the conversion of the produced terminal ester groups into the tertiary alcohol using 2-thienyllithium. Despite the steric constraints induced by the aromatic rings in the monolayer, the absolute surface coverage of the organic chains was found to be high, ca. 40%. Differential capacitance measurements revealed that the derivatization procedure introduced surface states probably due to some oxidation of the Si(111) surface occurring during the photochemical step. The photopotentiodynamical oxidation of the modified Si(111) surfaces in the presence of thiophene yielded strongly adherent and smooth conducting polythiophene films. These photoelectrogenerated hybrid polythiophene-silicon junctions were then characterized by ex situ electrical measurements (dc transport, ac impedance, and surface potential measurements). The expected diode behavior due to the formation of a Schottky barrier at the alkyl/Si(111) interface was clearly observed although the rectification was rather weak and the characteristics highly nonideal. The surface states at the silicon interface were found to play a major role in determining the electrical properties of such junctions.

show abstract

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Generation of Electronically Conducting Polymer-Based Hybrid Junctions on Modified Si(111) Surfaces

2003

View full text Add to dashboard Cite

show abstract

“…A careful analysis has ruled out the possibility that diffusion of gold particles through the polymeric bilayers could somehow be contaminating the results. 17 First of all, an electron microscopy investigation of the samples has revealed a very homogeneous deposition of the polymeric layers upon the gold substrate. At the same time, an eventual diffusion of evaporated gold facilitated by the presence the presence of pinholes defects 18 the case of the films with 15 and 20 bilayers, the transversal resistivity of the samples is larger than the corresponding longitudinal component in all cases examined.…”

Section: ͑2͒mentioning

confidence: 99%

Low-temperature electrical anisotropy of self-assembled organic films

Melo

2002

Phys. Rev. B

View full text Add to dashboard Cite

We have examined the low-temperature characteristics of the charge transport in self-assembled organic films with thickness varying from 5 to 60 deposited bilayers of polypyrrole and polythiophene acetic acid. When the temperature is progressively decreased, independent measurements of the longitudinal and transversal components of the resistivity tensor of these thin films reveal that while the conductivity along the surface directions has the expected semiconducting profile, the charge transport in the transversal direction exhibits a positive temperature coefficient ͑PTC͒. For the samples with a small number of deposited bilayers we observe that at very low temperatures the PTC characteristics disappear and a tunnelinglike current begins to dominate the transversal charge transport.

show abstract

“…Indeed, the electronic properties of these assemblies can be manipulated by changing (a) the dopant type (p or n) or density of the underlying silicon surface, (b) the length of the alkyl chain playing the role of the insulator and (c) the electron conductivity of the overlaying conducting polymer layer, essentially by electrochemistry. Moreover, compared to metal-organicsemiconductor (or metal) junctions for which an evaporated metal is typically used for the electrical top contact, the use of a conducting polymer as the top contact could be particularly attractive [9], avoiding potential damage to and/or penetration into the organic layer that often results from metal deposition [10][11][12][13]. However, the integration of such conducting polymer/silicon junctions into molecular scale devices requires the development of novel strategies for depositing or growing the conducting polymer with high spatial resolution [14].…”

Section: Introductionmentioning

confidence: 99%

Micro- and nanopatterns of polythiophene covalently bound to silicon

Fabre

Wayner

2005

Comptes Rendus. Chimie

View full text Add to dashboard Cite

Micro-and nanopatterns of polythiophene covalently bound to Si(111) have been generated from the photoelectrochemical oxidation of silicon surfaces patterned with thiophene-terminated decyl and decyl monolayers in the presence of thiophene. The procedure used for the attachment of these organic monolayers on silicon involved either UV photolithography or a highly diluted mixture of precursor alkenes.

show abstract

Formation of gold particles at a functional LB film/gold interface leading to Coulomb blockade phenomena

Cited by 4 publications

References 10 publications

Photoelectrochemical Generation of Electronically Conducting Polymer-Based Hybrid Junctions on Modified Si(111) Surfaces

Photoelectrochemical Generation of Electronically Conducting Polymer-Based Hybrid Junctions on Modified Si(111) Surfaces

Low-temperature electrical anisotropy of self-assembled organic films

Micro- and nanopatterns of polythiophene covalently bound to silicon

Contact Info

Product

Resources

About