Nanowires - Recent Advances by Xihong Peng

By Xihong Peng

One dimensional nanoscale constructions resembling nanowires have drawn wide examine pursuits in recent times. the dimensions miniature brings designated homes to nanowires because of quantum confinement. the massive surface-to-volume ratio renders nanowires with excessive sensitivity to floor results. the original geometrical merits and houses facilitate the usage of nanowires in nano-electronics. InTech medical writer has initialized a sequence of books targeting primary learn in nanowires, which mostly boosted the frequent of information one of the examine society. This publication is meant to supply an up to date assessment at the purposes of assorted nanowires and the linked developments in synthesis and homes characterization. the themes comprise fresh growth in steel oxide nanowires, silicon nanowires, carbon dependent nanotubes and nanowires.

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The simple and low-cost technique of thermal oxidation technique is effectively used to prepare the MOSs nanowires. The sensing characteristics of the MOS sensors strongly depend on sizes and morphologies of ZnO nanostructures. The sensitivity formulas have been developed in order to explain all circumstances of gas sensors based on MOS nanowires. The size and morphology dependences on the sensitivity have been explained in terms of the two important parameters including surface-to-volume ratio and depletion layer width.

1(b)) and nanowires with rounded tip (Fig. 1(c)). ) revealed that the nanowires were grown almost perpendicularly on the substrates and their lengths were about 3 μm. It is known that each nucleation site usually supported growth of only one nanowires, but when the nucle‐ ation sites were close together, two nanowires combined into one with a larger diameter [37] and different surface morphologies were obtained. From XRD pattern (Fig. 2), a prominent ZnO (0002) peak is observed, which corresponds to the growth of ZnO nanowires along c-axis.

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