Self-affine fractal electrodeposited gold surfaces : Characterization by scanning tunneling microscopy
The morphological evolution of columnar gold electrodeposits grown at 100 nm s <sup>−1</sup> by electroreducing a gold oxide layer on a gold cathode has been studied at a nanometer level by scanning tunneling microscopy. The interface thickness (ξ) depends on the scan length (L) as ξ∝ L...
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 1994 |
| País: | Argentina |
| Recursos: | Universidad Nacional de La Plata |
| Repositório: | SEDICI (UNLP) |
| Idioma: | inglês |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/85650 |
| Acesso em linha: | http://sedici.unlp.edu.ar/handle/10915/85650 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Ciencias Exactas Química Fractales electrodeposits electroreduction Oro scanning tunneling microscopy Óxidos |
| Resumo: | The morphological evolution of columnar gold electrodeposits grown at 100 nm s <sup>−1</sup> by electroreducing a gold oxide layer on a gold cathode has been studied at a nanometer level by scanning tunneling microscopy. The interface thickness (ξ) depends on the scan length (L) as ξ∝ L <sup>α</sup> with α=0.49±0.07 for L > d<sub>s</sub>, where d<sub>s</sub> is the average top columnar size, and α=0.90±0.07 for L < d<sub>s</sub>. These results prove that the growing surface can be described as a self-affine fractal for length scales greater than the columnar size. Conversely, the columnar surface approaches the behavior of an Euclidean surface. |
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