Morphogenesis of shapes and surface patterns in mesoporous silica
Article Abstract:
Scanning electron microscopy, transmission electron microscopy and polarized optical microscopy were utilized to index the basic configurations and surface patterns, to confirm connections between morphology and structure, and to establish the relationship between optical anisotropy and the periodic porous mesostructure, respectively. Optical anisotropy arise from the global polarization of an average electron density. Furthermore, the geometries governing the structures reveal an underlying growth and curvature pattern characteristic of a nonequilibrium system and are dependent on the choice of the reaction parameters.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Synthesis of oriented films of mesoporous silica on mica
Article Abstract:
The synthesis of thin ordered films of mesoporous silica on mica substrates involves nucleation of silica-surfactant-mica interfacial interactions that provide the assembly of silica-surfactant micellar seeds on the mica. Elongated mesoporous silica-film islands develop on the surface, oriented along the hexagonal cell axes of mica. Transmission electron microscopy indicates that the channels are arranged parallel to the mica surface. The powder X-ray diffraction patterns of mesoporous silica exhibit dominant (100) and (200) reflections.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Lamellar aluminophosphates with surface patterns that mimic diatom and radiolarian microskeletons
Article Abstract:
The synthesis of crystalline mesolamellar aluminophosphates (MLA) involves the templating by self-agglomerated organic aggregates in non-aqueous tetraethylene glycol, phosphoric acid and amphiphilic alkylamine. X-ray diffraction analysis of the structure of MLA reveals that the morphology and surface patterns depend upon two distinct decylammonium dihydrogen phosphate assemblies. The skeletal characteristics of MLA such as deficiency of long-range order and bowl-like characteristics are found to be similar to radiolarians and diatoms.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Evolutionary mismatch of mating preferences and male colour patterns in guppies. Absence of female conspecifics induces homosexual behavior in male guppies
- Abstracts: How the brain learns to see objects and faces in an impoverished context. A functional neuroanatomy of hallucinations in schizophrenia
- Abstracts: Research centres face chaos after German ruling on tax. German poll could change research goals. .... As leak fuels German uranium debate
- Abstracts: Genomics boosted as Japan unveils plans for state-funded companies. Japan sharpens selection of grant winners
- Abstracts: Chernomyrdin promises 'significant increase' for science. Russia to focus science on high-tech goals. New Russian funding cuts spark protests from researchers