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Effect of grain orientations of Cu seed layers on the growth of <111>-oriented nanotwinned Cu.


ABSTRACT: We investigate the growth of Cu films on two different Cu seed layers: one with regular <111>-oriented grains and the other with very strong <111>-preferred orientation. It is found that densely-packed nanotwinned Cu (nt-Cu) can be grown by pulsed electroplating on the strong <111>-oriented Cu seed layer without a randomly-oriented transition layer between the nt-Cu and the Cu seed layer. The electroplated nt-Cu grow almost epitaxially on the seed layer and formed <111>-oriented columnar structures. However, with the regular <111>-oriented Cu seed, there is a randomly-oriented transition layer between the nt-Cu and the regular <111>-oriented Cu seed. The results indicate that the seed layer plays a crucial role on the regularity of <111>-oriented nanotwinned Cu.

SUBMITTER: Liu CM 

PROVIDER: S-EPMC4137260 | BioStudies | 2014-01-01

SECONDARY ACCESSION(S): 10.1038/srep06123

REPOSITORIES: biostudies

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