Single-crystalline nanobelts of molybdenum trioxides (MoO(3)) were grown by a thermal evaporation method of molybdenum metal pellets at ambient pressure in a flow of O(2). The chemical composition, crystalline structure and optical properties of the nanobelts were investigated by various characterization techniques such as scanning electron microscopy, transmission electron microscopy, Raman-scattering, energy dispersive X-ray spectroscopy and UV-vis-NIR spectroscopy. The samples were nanobelts with a width up to 50 mu m, about 85 nm in thickness and from tens to several hundred micrometers in length. The analysis indicated that as-synthesized samples were orthorhombic structured MoO(3) grown with [0 0 1] preferred orientation. The fundamental optical absorption edge corresponds to direct allowed transitions with an energy gap located at about 3.01 eV.
Characteristics of molybdenum trioxide nanobelts prepared by thermal evaporation technique
SICILIANO, Tiziana;TEPORE, Antonio;FILIPPO, Emanuela;MICOCCI, Gioacchino;TEPORE, MARCO
2009-01-01
Abstract
Single-crystalline nanobelts of molybdenum trioxides (MoO(3)) were grown by a thermal evaporation method of molybdenum metal pellets at ambient pressure in a flow of O(2). The chemical composition, crystalline structure and optical properties of the nanobelts were investigated by various characterization techniques such as scanning electron microscopy, transmission electron microscopy, Raman-scattering, energy dispersive X-ray spectroscopy and UV-vis-NIR spectroscopy. The samples were nanobelts with a width up to 50 mu m, about 85 nm in thickness and from tens to several hundred micrometers in length. The analysis indicated that as-synthesized samples were orthorhombic structured MoO(3) grown with [0 0 1] preferred orientation. The fundamental optical absorption edge corresponds to direct allowed transitions with an energy gap located at about 3.01 eV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
