Großflächige Anordnung von Wolframoxidnanodrähten auf ebenen und strukturierten Substraten für Gassensorik bei Raumtemperatur

Solution Growth of Modified Ultrathin W18 O49 Nanobelts with Enhanced Chemical Activity against Alkylamine Radicals

Group IVB ions (Ti⁴⁺ and Zr⁴⁺ ) are employed to modify solution growth of W₁₈ O₄₉ nanocrystals. In the presence of group IVB ions, the morphology of the produced monoclinic W₁₈ O₄₉ nanocrystals can be modulated from inhomogeneous shapes to uniform an ultrathin nanobelt with the (1‾ 01) lattice plane being the main exposure surface. Interestingly, the ultrathin W₁₈ O₄₉ nanobelts exhibit a unique chemical activity against alkylamine radicals, probably originated from the highly increased exposure of the (1‾ 01) plane with extra tungsten and oxygen atoms inserted in the regular lattice, which makes this nanomaterial an active photocatalyst for the N-de-ethylation reaction of the rhodamine B molecules, as well as a promising gas sensor matrix with selective responses to alkylamine molecules, including diethylamine, dimethylamine, triethylamine and trimethylamine. These results could provide useful inspiration for developing other functional nanomaterials with technical significance via modification of their morphologies and chemical properties.

Facile One-Pot Synthesis of Tellurium Nanorods as Antioxidant and Anticancer Agents

Nanorods have been utilized in targeted therapy, controlled release, molecular diagnosis, and molecule imaging owing to their large surface area and optical, magnetic, electronic, and structural properties. However, low stability and complex synthetic methods have substantially limited the application of tellurium nanorods for use as antioxidant and anticancer agents. Herein, a facile one-pot synthesis of functionalized tellurium nanorods (PTNRs) by using a hydrothermal synthetic system with a polysaccharide-protein complex (PTR), which was extracted from Pleurotus tuber-regium, as a capping agent is described. PTNRs remained stable in water and in phosphate-buffered saline and exhibited high hemocompatibility. Interestingly, these nanorods possessed strong antioxidant activity for scavenging 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid radical cation (ABTS(.+) ) and 2,2-diphenyl-1-picrylhydrazylhydrate (DPPH) free radicals and demonstrated novel anticancer activities. However, these nanorods exhibited low cytotoxicity toward normal human cells. In addition, the PTNRs effectively induced a decrease in the mitochondrial membrane potential in a dose-dependent manner, which indicated that mitochondrial dysfunction might play an important role in PTNR-induced apoptosis. Therefore, this study provides a one-pot strategy for the facile synthesis of tellurium nanorods with novel antioxidant and anticancer application potentials.