Tetrathiafulvalenium–bromide systems as nanosticks and nanoparticles stabilized by PEDOT

Nanoparticles of Molecular Conductors and Superconductors: Progress Over the Last Ten Years

“…Synthetic methods of nanoparticles of molecular conductors have been reviewed: [ 27 ] template chemistry consists in growing the material within the pores of a solid matrix, [ 28 ] embedment in a polymer results in composite materials, [ 14c,14e,18 ] and addition of a growth controlling agent to the reaction mixture affords isolated nanoparticles. This section will focus on this third method and discuss the selection and role of the additional agents according to the applied chemical or electrochemical synthetic method.…”

“…Indeed, spheroidal nanoparticles of molecular conductors that generally grow as needles, are metastable and subject to any association that reproduces elongated objects. In a few cases, aggregation results in a super‐organization of the particles: nanosticks of TTFBr 0.56 [ 18 ] (Figure 8b) or stacks of hexagonal superstructures for Et 2 [Cu(NCS) 2 ] (Figure S3). Such associations are facilitated when the particles are not protected by the growth controller.…”

Nanoparticles of molecule-based conductors

“…15,16 Me 4 N[Ni(dmit) 2 ] 2 nanowires, consisting in chains of nanopearls, were grown using a porous membrane as a template. 17 Attempts to imbed TTFÁTCNQ in gels 18 or TTFBr 0.59 in a PEDOT (poly-3,4-ethylene dioxythiophene) polymeric matrix 19 were successful, although they also produced needle-shaped crystallites. These examples provide evidence that methods have to be found to control the growth of the material after nucleation.…”

Nanoparticles of tetrathiafulvalene chloride derivatives grown in the presence of amphiphilic molecules

“…Furthermore, nanocrystals of TI'F bromide TIFBrx (x = 0.74 0.79) were grown as needles on platinum nano particles by electrochemical oxidation [7). Finally, TI'FBr 0. s 9 nanosticks were synthesized in the presence of PEDOT (poly(3,4 ethylenediox ythiphene)) behaving as a stabilizing agent [8). However, despite this variety of synthetic methods aiming at nano structured TIF halide systems, spherical nanoparticles are still very rare [8 [9).…”

“…Finally, TI'FBr 0. s 9 nanosticks were synthesized in the presence of PEDOT (poly(3,4 ethylenediox ythiphene)) behaving as a stabilizing agent [8). However, despite this variety of synthetic methods aiming at nano structured TIF halide systems, spherical nanoparticles are still very rare [8 [9). However, these nanoparticles showed a fairly inhomogeneous size distribution, ranging from 50 to 150 nm.…”