From molecule-based (super)conductors to thin films, nanowires and nanorings

Patrick Cassoux, Dominique De Caro, Lydie Valade, Hélène Casellas, Barbara Daffos, Maria Elena Sanchez Vergara

Research output: Contribution to journalConference articlepeer-review

17 Scopus citations

Abstract

Thin films of (TTF)(TCNQ) (TTF = tetrathiafulvalene, TCNQ = tetracyano-acyanoquinodimethane) are deposited on Si (001). KBr, and stainless steel conversion coatings (SSCC) using chemical vapor deposition. These films are characterized by I, XRD, conductivity measurements, and SEM. Conducting nanowires and nanorings of (TTF)(TCNQ) and nanowires of (TTF)[Ni(dmit) 2]2 (typically, 20 nm × 20μm) are prepared by successively dipping SSCC in acetonitrile solutions of TTF and TCNQ, or (TTF)3(BF4) and (Bu4N)[Ni(dmit)2], respectively. These nanowires are observed by SEM. The (TTF)(TCNQ) nanowires are also observed by TEM and AFM and charactered by current-voltage measurements. Nanowires of (TTF)[Ni(dmit)2]2 are also obtained on silicon conversion coatings (SiCC) and characterized by Roman spectroscopy.

Keywords

  • Chemical vapor deposition
  • Conversion coatings
  • Molecular conductors
  • Nanowires: Nanorings
  • Thin films

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