Nanowires transition

Fig. 13.13 Schematic of Langmuir-Blodgett monolayers. As the trough wall are pushed in, indicated by the arrows, the surface pressure is increased and the nanowires transition through the sequence of phases isotropic, 2-D nematic, 2-D smectic, 3-D nematic...

Li and coworkers have proposed a new mechanism that assumes different nanotube to nanowire transitions for different melting point metals. As mentioned earlier, the morphology of sputtered base electrodes are annular, and the authors assume that all metals synthesized with this base electrode morphology initially form tubes, and depending on the conditions, some materials... 

Yonghong N, li Hua, Jin Lina, Hong Jianming (2009) Synthesis of ID Cu(OH)2 nanowires and transition to 3D CuO microstructures under ultrasonic irradiation, and their electrochemical property. Cryst Growth Des 9(9) 3868-3873... 

The polycarbonate membranes are stretch-oriented during fabrication in order to improve their mechanical properties. If the membrane is subsequently heated above its glass-transition temperature ( 150°C), the polymer chains relax to their unstretched conformation and the membrane shrinks. This shrinking of the membrane around the Au nanowires in the pores causes the junction between the nanowire and the pore wall to be sealed. This is illustrated in Fig. 5, which shows voltammograms for tri-methylaminomethylferrocene (TMAFc+) before (Fig. 5A) and after (Fig. 

Nanowire systems have attracted a great deal of attention recently due to their technological potential They are of fundamental interest because they exhibit unique quantum confinement effects. In this article, advances in the fabrication of nanowires via template-assisted and laser-assisted approaches are reviewed. The structure and characteristics of different nanowire systems are discussed. To understand and predict the unusual properties of nanowires, we have developed a generalized theoretical model for the band structure of these onedimensional systems. A unique semimetal-semiconductor transition that occurs in bismuth nanowires is described. Transport measurements on bismuth and antimony nanowires illustrate that these novel materials are very different from their bulk counterparts. A transport... 

Fig. 16. Schematic illustrating the semimetal-semiconductor transition in nanowires made of semimetals (a) bulk semimetals with a band overlap between the electrons and the holes, (b) nanowires with the critical wire diameter dc where the band overlap vanishes, and (c) nanowires with diameters smaller than dc, exhibiting a bandgap between the conduction and valence bands.

Semimetallic nanowires carrier density, 190-191 schematic of transition, 189 semimetal-semiconductor transition, 188-191 Separations... 

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