Synthesis, characterization, and thermoelectric properties of superconducting (BEDT-TTF)(2)I-3 nanoparticles
Résumé
The synthesis of (BEDT-TTF)(2)I-3 in the presence of two neutral amphiphilic molecules [N-octylfurfurylimine and 1-octanamine, N-(2-thienylmethylene)] leads to single and aggregated nanoparticles of 2 to 6 nm size. The samples contain highly crystalline nanoparticles of the beta(CO)-(BEDT-TTF)(2)I-3 phase, confirmed by XRD. Temperature dependent resistance and magnetic susceptibility studies evidence the superconducting transition characteristics of the beta(CO)-(BEDT-TTF)(2)I-3 phase. The I-V curve of a single nanoparticle aggregate, measured using AFM, exhibits an expected semiconductor-like behaviour. Thermoelectric studies led to a ZT of 1.47 x 10(-3) at 300 K.