Tubules-Within-a-Tubule Hierarchical Order of Mesoporous Molecular Sieves in MCM-41
- 9 August 1996
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 273 (5276), 765-768
- https://doi.org/10.1126/science.273.5276.765
Abstract
The recently discovered mesoporous aluminosilicate MCM-41 consists of hexagonal arrays of nanometer-sized cylindrical pores. It is shown that this material can be synthesized by cooperative condensation of silicate and cylindrical cationic micelles. Careful control of the surfactant-water content and the rate of condensation of silica at high alkalinity resulted in hollow tubules 0.3 to 3 micrometers in diameter. The wall of the tubules consisted of coaxial cylindrical pores, nanometers in size, that are characteristic of those of MCM-41. The formation of this higher order structure may take place through a liquid crystal phase transformation mechanism involving an anisotropic membrane-to-tubule phase change. The hierarchical organization of this “tubules-within-a-tubule” particle texture is similar to that of the frustules of marine diatoms.Keywords
This publication has 21 references indexed in Scilit:
- A New Phase of Tethered Membranes: TubulesPhysical Review Letters, 1995
- Lamellar aluminophosphates with surface patterns that mimic diatom and radiolarian microskeletonsNature, 1995
- Structure Organization of Silicate Polyanions with Surfactants: A New Approach to the Syntheses, Structure Transformations, and Formation Mechanisms of Mesostructural MaterialsJournal of the American Chemical Society, 1995
- Direct TEM Imaging of Tubules in Calcined MCM-41 Type Mesoporous MaterialsChemistry of Materials, 1995
- Micelle to Lamellar Aggregate Transition of an Anionic Surfactant in Dilute Aqueous Solution Induced by Alkali Metal Chloride and Tetraalkylammonium Chloride SaltsLangmuir, 1995
- Biomineralization and biomimetic materials chemistryJournal of Materials Chemistry, 1995
- Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanismNature, 1992
- Measurements of Modulated LamellarPhases of Interacting Lipid MembranesPhysical Review Letters, 1988
- Scanning Tunneling Microscopy of Freeze-Fracture Replicas of BiomembranesScience, 1988
- Phase behaviour and lyotropic liquid crystals in cationic surfactant–water systemsJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1988