Search

Abstract: Large scale NdB6 nanowires have been successfully fabricated for the first time using a self-catalyst method with Nd powders and boron trichloride (BCl3) gas mixed with hydrogen and argon. X-ray diffraction, scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) were used to characterize the samples. Transmission electron microscopy (TEM) reveals that the NdB6 nanowires are single crystals with cubic structure. Our investigation forms part of a series of studies for finding comparatively inexpensive methods to prepare RB6 nanomaterials. [Copyright &y& Elsevier]

Abstract: Large-scale calcium hexaboride (CaB6) nanostructures have been successfully fabricated with self-catalyst method using calcium (Ca) powders and boron trichloride (BCl3) gas mixed with hydrogen and argon. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected-area electron diffraction (SAED) were used to characterize the compositions, morphologies, and structures of the samples. Our results show that the nanowires are highly single crystals elongated preferentially in the [110] direction. The growth mechanism based on the self-catalyst process is simply discussed. [Copyright &y& Elsevier]

Abstract: Europium hexaboride (EuB6) nanowires and nanotubes have been successfully fabricated with self-catalyst method using europium (Eu) powders and boron trichloride (BCl3) gas mixed with hydrogen and argon. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the compositions, morphologies, and structures of the samples. Our results show that EuB6 nanowires are 60–300nm thick and 1–10μm long. TEM reveals that the nanowires are highly crystalline with growth direction of [100]. In our experiment, EuB6 nanotubes have also been observed. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) patterns identify that the EuB6 nanotubes are polycrystalline in nature. A growth mechanism based on the self-catalyst process is proposed for the formation of nanowires. [Copyright &y& Elsevier]