Langmuir-Blodgett superconductors based on C60, new donor-acceptor systems, and a new conducting polymer
1995; Elsevier BV; Volume: 70; Issue: 1-3 Linguagem: Inglês
10.1016/0379-6779(94)02908-h
ISSN1879-3290
AutoresRobert M. Metzger, Ping Wang, Xiangli Wu, Gregory V. Tormos, Dominique Lorcy, Ірина Щербакова, M. V. Lakshmikantham, Michael P. Cava,
Tópico(s)Graphene research and applications
ResumoPure C60 forms Langmuir-Blodgett (LB) multilayers; a hysteretic low-field signal in an EPR spectrometer in a K-doped 50-layer LB multilayer of C60 appears at or below 8.1 K, due to flux exclusion (Meissner-Ochsenfeld effect) by K3C60, i.e. due to superconductivity: this is the first LB film superconductor. The crystal structure of BDMT-TTeF (1) with C60 and a molecule of CS2, an electrical insulator, has been determined. Other donors, such as DTDAF (2), form a 1:1 insulating and a 2:5 semiconducting (0.01 S/cm) complex with TCNQ, with evidence for TCNQ-- dianions in the solid state. A conducting polymer, poly-(naptho-[2,3-c]thiophene-alt-bithiophene) (3) has a band gap of only 0.65 eV, and a conductivity of 0.002 S/cm.
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