Modification of MnO(2) nanoparticles with rutin synthesized by Triton X-100 aggregations' template.

Manganese dioxide (MnO(2)) nanoparticles have been prepared through the redox reaction between KMnO(4) and the nonionic surfactant Triton X-100 with the aid of rod-like micelles, hexagonal liquid crystals and reverse micelle templates, in which Triton X-100 acts both as template and reductant. MnO(2) nanorods (20-50 nm in diameter) can be obtained in rod-like micelles and hexagonal liquid crystals, whereas MnO(2) nanospheres (about 85 nm in diameter) are formed in reverse micelles. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are used to characterize the products. Modification of MnO(2) nanoparticles by rutin has been discussed using fluorescence spectra and UV-vis spectra, and the free radical eliminating investigations of surface-modified MnO(2) nanoparticles with rutin show that MnO(2) nanoparticles can improve the free-radical-scavenging activity of rutin.