Doped and wired: The organization of the π functional units in amide‐functionalized tetrathiafulvalene in a gel by hydrogen‐bonding interactions has given rise to nanofibers. Doping with iodine generates a conducting material, which upon annealing gives rise to nanowires with metal‐like conductivity (see current‐sensing AFM image).

In polymeric composite thin films it is possible to translate elastic elongations of the film into reversible nanoscale deformations of the soft organic‐crystal components, leading to films with extreme sensitivity to strain changes with durable, fast, and completely reversible responses. Simple prototypes (see image), demonstrate that these sensors are highly promising for a wide range of applications.

The low dimensional organic conductor (BEDT-TTF)(2)Br(1.3)I(1.1)Cl(0.6) [BEDT-TTF = bis(ethylenedithio)tertathiafulvalene] is shown to be a unique molecular solid that exists in three crystalline polymorphic forms (alpha'-, alpha' "-, beta' '-phase) and, surprisingly, is able to adopt the same metal-like beta' '-phase at both low (T < 185 K) and high (T > 395 K) temperatures. Several crystals of the alpha'- and alpha' "-phases have been studied using three different techniques: dc-conductivity measurements, ESR spectroscopy, and X-ray diffraction analysis. All these techniques show the existence of the reversible semiconductor <--> metal (alpha' " <--> beta' ') phase transition at both high and low temperatures as well as the alpha' <--> alpha' " phase transition at high temperatures. The phase transitions of these polymorphs are characterized by huge hysteresis and dramatic changes in the transport and magnetic properties. Based on ab initio calculations, it is suggested that dipole-dipole interactions can play a key role in the rich polymorphism of this molecular solid.

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We have examined various parameters of the electric arc synthesis of endohedral metallofullerenes (EMFs or M@C2 n ). The influence of some experimental parameters (M/C ratio, helium vapor pressure, and values of the direct current arc) on yields of EMFs has been studied. The optimization of these parameters allows us to bring the EMF yield to a record level of 6−8% of the primary soot mass. Furthermore, a selective extraction sequence [o-xylene (five cycles) − dimethylformamide (seven cycles)] has been studied in detail in order to apply this technique to the estimation of the EMF yield. It has also been shown that polar organic solvents, among them dimethylformamide (DMF), dimethylacetamide (DMA), and dimethylsulfoxide (DMSO), are the most favorable ones for a selective extraction of EMF.

Dotierte Drähte: Die Organisation der π‐Einheiten von amidfunktionalisiertem Tetrathiafulvalen in einem Gel durch Wasserstoffbrücken führt zur Bildung von Nanofasern. Dotieren mit Iod erzeugt ein leitfähiges Material, das durch Tempern in Nanodrähte mit metallartiger Leitfähigkeit übergeht (siehe Rasterkraftmikroskopiebild).

Functionalized gold nanoparticles with complementary H‐bonding groups can control the secondary structure of xerogel fibers formed by a molecular conductor thanks to their incorporation into the nanowires, which show metal‐like conductivity once doped without the need for annealing. The picture shows a photograph of the xerogel, TEM images of Au particles in the gel and a single fiber, and an AFM image revealing the texture of the gel.