Percolation network of growing V2O5 nanowires

Yu Jin Chang; Byung Hyun Kang; Gyu Tae Kim; Sung Joon Park; Jeong Sook Ha
June 2004
Applied Physics Letters;6/28/2004, Vol. 84 Issue 26, p5392
Academic Journal
Percolation network of the growing V2O5 nanowires was demonstrated by devising a simple but practical method to investigate the percolation phenomena. As the reaction proceeded in the ammonium(meta)vanadate solution at room temperature, the lengths of V2O5 nanowires increased at a speed of 0.13 μm/day at an early stage of the growth and 0.03 μm/day on the average up to 3 months. Percolation network was made by abruptly freezing the homogeneously dispersed aqueous solutions of V2O5 nanowires in liquid nitrogen. After 7 h of aging time, an abrupt increase of the conductance was observed, revealing the satisfaction of the percolation threshold (pc ∼0.17) at the average wire length of 40 nm.


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