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Spatially Sequential Growth of Various WSi2 Networked Nanostructures and Mechanisms
journal contribution
posted on 2013-09-19, 00:00 authored by Mohammad
Norouzi Banis, Xiangbo Meng, Yong Zhang, Mei Cai, Ruying Li, Xueliang SunVarious
WSi2 nanostructures including networked nanorods
(NNWs), networked nanoribbons (NNRs), and nanosheets (NSs) were sequentially
(spatial) synthesized in a controlled manner via a single-step chemical
vapor deposition method. Their morphology, structure, and composition
were characterized by scanning and transmission electron microscopes
and X-ray diffraction. The nanostructures are 6–10 nm in thickness
and several micrometers in length. The results reveal that the formation
of WSi2 nanostructures is governed by a vapor solid mechanism
and the concentration of reactive species plays a crucial role in
controlling the formation of the various morphologies of the synthesized
nanostructures. The time-dependent growth study shows that the nanostructures
feature two-dimensional growth of WSi2, resulting in nanonets
and nanosheets. Cyclic voltammetry measurements of these nanostructures
demonstrate the chemical capacitance characteristics of WSi2 nanosheets and nanoribbons. Not only has this study paved a new
route for preparing various nanostructures, but also these nanostructures
are of great interest for nanodevices and electrochemical applications.
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Keywords
Spatially Sequential Growthchemical vapor deposition methodWSi 2 nanostructuresNNWtransmission electron microscopesNSNNRelectrochemical applicationsnanostructures featurenetworked nanorodsMechanismsVarious WSi 2 nanostructuresCyclic voltammetry measurementsVarious WSi 2 Networked Nanostructureschemical capacitance characteristicsWSi 2 nanosheetsreactive species