Amphiphilic, linear conjugated poly[p-{2,5-bis(3-propoxysulfonicacidsodiumsalt)}phenylene]ethynylene (PPES) efficiently disperses single-walled carbon nanotubes (SWNTs) under ultrasonication conditions into the aqueous phase. Vis-NIR absorption spectroscopy, atomic force microscopy (AFM), and transmission electron microscopy (TEM) demonstrate that these solubilized SWNTs are highly individualized. AFM and TEM data reveal that the interaction of PPES with SWNTs gives rise to a self-assembled superstructure in which a polymer monolayer helically wraps the nanotube surface; the observed PPES pitch length (13 +/- 2 nm) confirms structural predictions made via molecular dynamics simulations. This work underscores design elements important for engineering well-defined nanotube-semiconducting polymer hybrid structures.

Non-obese NAFLD is more prevalent in women with polycystic ovary syndrome than in those without. In non-obese patients with polycystic ovary syndrome, hyperandrogenemia may be an independent risk factor for non-obese NAFLD.

The adsorption of CO on RuO2(110) single-crystalline thin films grown on Ru(0001) was studied with scanning tunneling microscopy (STM), thermal desorption spectroscopy (TDS), and high-resolution electron energy-loss spectroscopy. The stoichiometric RuO2(110) surface exhibits alternating rows of O-bridge and coordinatively unsaturated Ru atoms (Ru-cus). We identify two different CO adsorption states: CO-bridge and CO-cus. CO-bridge is known to adsorb at the O-bridge positions after reacting-off O-bridge. CO-cus is linearly bonded to Ru-cus in an on-top position and becomes stabilized only after complete filling of the CO-bridge sites. The CO-cus state exhibits two desorption maxima, at 200 and 320 K, corresponding to a surface coverage of approximately 1.0 (alpha state) and 0.5 (beta state), respectively. At 300 K and without CO gas in the background, CO-cus remains only temporarily present at the surface, and reaches coverages of 0.5. A coverage of 1.0 can be achieved by exposure to CO at 300 K to prepare CO-bridge and further exposure to CO at 85 K. From time-dependent STM and from TDS the binding energy of the beta-state CO-cus is determined at about –1.0 eV