Nanowires and nanoribbons formed by methylphosphonic acid

作者：Archanjo B S; Carvalho L A S; Rassa M; Miquita D R; de Oliveira F A C; Cancado L G; Agero U; Plentz F; Cury L A; Gonzalez J C; Moreira R L; Paniago R; Magalhaes Paniago R; Neves B R A^*

来源：Journal of Nanoscience and Nanotechnology, 2007, 7(9): 3071-3080.

DOI：10.1166/jnn.2007.683

• methylphosphonic acid
• nanowires
• nanoribbons

The production and physical properties of nanowires and nanoribbons formed by methylphosphonic acid (MPA)-CH3PO(OH)(2)-were investigated. These structures are formed on an aluminum coated substrate when immersed in an ethanolic solution of MPA for several days. A careful investigation of the growth conditions resulted in a narrow window of solution concentrations and temperatures for the successful development of nanowires and nanoribbons. Several different techniques were employed to characterize these nanostructures: (1) Photoluminescence experiments showed a strong emission at 2.3 eV (green), which is visible to the naked eye; (2) X-ray diffraction experiments indicated a significant cristalinity, in agreement with atomic force microscopy (AFM) and transmission electron microscopy (TEM) morphology images, which show organized nano-scale wires and ribbons, (furthermore, AFM-Phase and TEM images also suggest that nanoribbons are formed by well-aligned nanowires); (3) Conductive-AFM experiments revealed an intermediary conductivity for these structures (10(-1)/Ohm center dot m), which is similar to some intrinsic semiconductors and; (4) finally, Infrared, Raman, and X-Ray Photoelectron Spectroscopies produced information about the contents, structure, and composition of both wires and ribbons.

• 出版日期2007-9