Journal
SCIENCE CHINA-CHEMISTRY
Volume 59, Issue 3, Pages 271-276Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-015-5496-5
Keywords
biological materials; bio-inspired materials; multifunction
Categories
Funding
- National Natural Science Foundation of China [21273016, 51271195]
- National Basic Research Program of China [2013CB933003, 2015CB856800]
- Program for New Century Excellent Talents in University, Beijing Higher Education Young Elite Teacher Project
- Fundamental Research Funds for the Central Universities, 111 project [B14009]
- Key Research Program of the Chinese Academy of Sciences [KJZDEW-M01, M03]
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As a novel class of metallic materials, bulk metallic glasses (BMGs) have attracted a great deal of attention owing to their technological promise for practical engineering applications. In nature, biological materials exhibit inherent multifunctional integration, which provides some inspiration for scientists and engineers to construct multifunctional artificial materials. In this contribution, inspired by superhydrophobic self-cleaning lotus leaves, multifunctional bulk metallic glasses (BMG) materials have been fabricated through the thermoplastic forming-based process followed by the SiO2/soot deposition. To mimic the microscale papillae of the lotus leaf, the BMG micropillar with a hemispherical top was first fabricated using micro-patterned silicon templates based on thermoplastic forming. The deposited randomly distributed SiO2/soot nanostructures covered on BMG micropillars are similar to the branch-like nanostructures on papillae of the lotus leaf. Micro-nanoscale hierarchical structures endow BMG replica with superhydrophobicity, a low adhesion towards water, and self-cleaning, similar to the natural lotus leaf. Furthermore, on the basis of the observation of the morphology of BMG replica in the Si mould, the formation mechanism of BMG replica was proposed in this work. The BMG materials with multifunction integration would extend their practical engineering applications and we expect this method could be widely adopted for the fabrication of other multifunctional BMG surfaces.
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