摘要
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 SiO_2/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 SiO_2/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.
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 mi- croscale papillae of the lotus leaf, the BMG micropillar with a hemispherical top was first fabricated using micro-patterned sil- icon 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 mecha- nism of BMG replica was proposed in this work. The BMG materials with multifunction integration would extend their practi- cal engineering applications and we expect this method could be widely adopted for the fabrication of other multifunctional BMG surfaces.
基金
the National Natural Science Foundation of China (21273016, 51271195)
the National Basic Research Program of China (2013CB933003, 2015CB856800)
the Program for New Century Excellent Talents in University, Beijing Higher Education Young Elite Teacher Project, the Fundamental Research Funds for the Central Universities, 111 project (B14009)
the Key Research Program of the Chinese Academy of Sciences (KJZDEW-M01, M03)
