The ability to grow nanostructures on different metal underlayers is important for several other reasons, including the fact that the identity of the metal is {HEAD ~ an additional parameter} that can be tuned to control parameters of grown nanostructures such as {TAIL ~ height}, diameter, density, etc., and because different metal work functions can be exploited to control the height of a resulting Schottky barrier between the metal underlayers and the nanostructures, thus permitting control over device functionality 
The ability to grow nanostructures on different metal underlayers is important for several other reasons , including the fact that the identity of the metal is { HEAD ~ an additional parameter } that can be tuned to control parameters of grown nanostructures such as { TAIL ~ height } , diameter , density , etc . , and because different metal work functions can be exploited to control the height of a resulting Schottky barrier between the metal underlayers and the nanostructures , thus permitting control over device functionality
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