A hydrothermal method was used to synthesize nanocrystalline SnO 2 particles with an average particle size of 3.0 ( 0.5 nm. Thermally treated SnO 2 with an average diameter of 3.3 ( 0.6 nm was obtained by the annealing of the as-synthesized SnO 2 , which was treated at 300 °C for 1 h under 10% H 2 /Ar. An atomic ratio of 2.3/1 (O/Sn) was observed for the thermally treated SnO 2 compared to 1.2/1 for the as-synthesized one. However, a smaller surface area of 92 m 2 /g was measured for the thermally treated SnO 2 as compared with 130 m 2 /g for the as-synthesized SnO 2 . Due to the occupation of the chloride ions in the oxygen sites of the as-synthesized SnO 2 , the thermally treated SnO 2 displayed better sensing performance for ethanol when compared with as-synthesized SnO 2 . The sensing performance of the as-synthesized SnO 2 sensor can be greatly improved by simply heating it at 350 °C for 5 min to partly remove Clfrom SnO 2 nanoparticles. The thermally treated SnO 2 exhibited good sensitivity to alcohol, i.e., methanol, ethanol, and propanol. The concentration detection limit can be as low as 1.7 ppm. Furthermore, the increased sensor signal was found to depend on the carbon chain number of the alcohol.

The laser ablation technique has been employed to prepare Cu colloids from CuO powder in 2-propanol using wavelengths of 1064 and 532 nm. The copper colloids resulting from 1064 nm irradiation were conspicuously stable under aerobic conditions without any protective agent present. In addition to Cu particles, the formation of oxidized product, acetone, from 2-propanol was detected by gas chromatography. The discrepancy in the Cu colloidal formation between 1064 and 532 nm was analyzed on the basis of the absorptive ability of CuO powder, the results of the power dependence, and the measurements of the dose effect. The process of photoinduced coalescence that formed larger spherical particles was found to be wavelength-dependent. The stability of the Cu colloids could be the result of their near-perfect spherical shape and the effect of their larger size.

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Das Beste aus drei Welten: Ein System bestehend aus Goldnanostäbchen mit Poly(styrol‐alt‐maleinsäure)‐Hülle (siehe Bild; pink), dem Photosensibilisator Indocyaningrün (schwarz) und Antikörpern (grüne „Y“) lässt sich nicht nur für die photodynamische Therapie und als hyperthermisches Reagens zur Zerstörung maligner Zellen einsetzen, sondern wirkt simultan auch als Kontrastfarbstoff zur Bildgebung von Zellen im Nah‐Infrarot.

The Fe(3)O(4) nanoparticles, tailored with maleimidyl 3-succinimidopropionate ligands, were conjugated with paclitaxel molecules that were attached with a poly(ethylene glycol) (PEG) spacer through a phosphodiester moiety at the (C-2')-OH position. The average number of paclitaxel molecules/nanoparticles was determined as 83. These nanoparticles liberated paclitaxel molecules upon exposure to phosphodiesterase.