Ordered Arrays of Mesoporous Microrods from Recyclable Macroporous Silicon Templates

Abstract

Ordered arrays of freestanding mesoporous microrods (see figure) are obtained from macroporous silicon templates with hydrophobized pore walls. The microrods can be removed from the template by simple mechanical lift‐off. Since no wet‐chemical etching step is involved, condensation of the rods is avoided and the template can be recycled. The hierarchical structures combine features on the nano‐ and microscale and have a well‐controlled geometry.

Supramolecular Organization of Polymeric Materials in Nanoporous Hard Templates

“…It is noteworthy that inside macroporous silicon with a pore diameter of 1 µm no preferred mesopore orientation was found. Instead, the mesoporous microfibers consisted of segments with different mesopore orientations [19].…”

“…Such arrays are of interest since they may exhibit specific wetting and adhesive properties [17,18]. Recently reported approaches to the mechanical extraction of fiber arrays from porous templates [19,20] need to be optimized and require that the nanotubes are tightly connected with an underlying substrate.…”

Synthesis of Ordered Polymer Micro and Nanostructures Via Porous Templates

“…In recent years, the fabrication of microstructures and nanostructures has attracted great interest [1][2][3]. The deposition of specific materials, such as polymers and non-linear materials, into porous templates allows tailoring new structures.…”

Anisotropic Colloidal Templating of 3D Ceramic, Semiconducting, Metallic, and Polymeric Architectures

“…Current 3D colloidal structures are generally assembled from spherical, or in a few cases near-spherical (aspect ratio of 1.3 to 1.6) [ 14 ] building blocks, and hence function only as isotropic or nearly isotropic templates. To date, highly anisotropic templates have primarily been confi ned to two-dimensional (2D) architectures, such as anodically derived porous alumina [ 15 ] and silicon, [ 16 ] which yield templated materials with limited and poorly controlled connectivity in the lateral direction. The ability to create 3D anisotropic architectures over large areas with precisely patterned sub-micrometer features is therefore lacking.…”