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Much of traditional metallurgy depends on manipulating thermodynamic and kinetic constraints to achieve the desired microstructure. It is becoming apparent that it may be possible to exploit similar principles to achieve designer self-assembled nanostructures on surfaces. A key question in determining equilibrium island sizes is whether epitaxial growth occurs with commensurate lattice parameters...
Titanium disilicide spontaneously forms small islands at low coverages on Si(001). We have used scanning tunneling microscopy to image islands formed by evaporation with deposition and annealing temperatures in the range 650-950 o C. At all temperatures some of the islands have surfaces that are flat and parallel to the substrate surface. Atomic resolution images reveal two different phases,...
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