| Hits: 106
Abstract: In this paper, we report on the interaction of multifunctional nanoparticles with living endothelial cells. The nanoparticles were synthesized using direct growth of gallium nitride on zinc oxide nanoparticles alloyed with iron oxide followed by core decomposition in hydrogen flow at high temperature. Using transmission electron microscopy, we demonstrate that porcine aortic endothelial cells take up GaN-based nanoparticles suspended in the growth medium. The nanoparticles are deposited in vesicles and the endothelial cells show no sign of cellular damage. Intracellular inert nanoparticles are used as guiding elements for controlled transportation or designed spatial distribution of cells in external magnetic fields.
| Hits: 1235
Abstract
It is proposed to use the variation of the electrolyte temperature to fabricate titania nanotubes with variable inner diameter at a constant outer diameter and an invariable package density. The anodization of Ti sheets in an ethylene glycol and HF containing electrolyte is found to allow the preparation of nanotubes with the inner diameter controlled in the range from 10 nm to more than 250 nm through the change of the electrolyte temperature from –20 °C to +50 °C. The peculiarities of the anodization process performed at low electrolyte temperatures are discussed.
Keywords: titania templates; nanotubes; electrochemistry; self-organization
| Hits: 1457
Abstract
We report on a technological route allowing one to integrate huge amounts of electrically isolated metal or semimetal (Pb/Sn alloys and Bi) nanowires in glass fibers with the diameter of up to a few hundreds of micrometers and the length reaching 1 m, the nanowires exhibiting a two-dimensional hexagonal distribution in the cross-sectional plane. The obtained results are indicative of new challenges for the elaboration of photonic crystals based on metallo-dielectric periodic and quasi-periodic structures.
Keywords: Nanowires; Fiber technology; Capillary drawing; Nanomaterials; Metallo-dielectric structure
| Hits: 1256
Abstract
Keywords: Semiconductors; Suspended membrane; Dislocation network; Electron microscopy; Luminescence
http://dx.doi.org/10.1016/j.matlet.2010.10.033
| Hits: 1290
Abstract
We report on fabrication of metalnanotubes in semiconductor nanotemplates possessing ordered two-dimensional hexagonal arrays of pores grown in n-InP crystalline substrates using anodic etching in neutral electrolyte. Electrochemical pulsed deposition of arrays of Pt nanotubes with diameters of 70 and 140 nm is demonstrated. The produced metallo-semiconductor tubular structure behaves like a layered nanomaterial allowing one to easily cleave thin films consisting of rows of Pt nanotubes in semiconductorenvelope.
Keywords: Anodic etching; Semiconductor nanotemplate; Electrochemical deposition; Metalnanotubes
| Hits: 1262
Abstract: