Formation of Helical Organic–Inorganic Hybrid Silica Nanotubes Using a Chiral Anionic Gelator

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Abstract:

Right-handed helical organic–inorganic hybrid silica nanotubes were prepared using a chiral anionic gelator with 3-aminopropyltrimethoxysilane as a co-structure-directing agent and 1,4-bis(triethoxysilyl)benzene, 4,4′-bis(triethoxysilyl)-1,1′-biphenyl, bis(triethoxysilyl)methane, 1,2-bis(triethoxysilyl)ethane, and 1,2-bis(triethoxysilyl)ethene as the precursors. The sol–gel reactions were carried out in a mixture of water and ethanol at the volume ratio of 2.2:1.8. The nanostructures were studied using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). For 4,4′-biphenylene-silica nanotube, the circular dichroism spectrum indicates at least some of the biphenyl rings within the walls stack in chiral form. The TEM images taken after different reaction time reveal a cooperative mechanism. The growth of the organic self-assemblies and the adsorption of the hybrid silica oligomers occurred at the same time.

Keywords: CHIRAL; GELATOR; HELICITY; HYBRID SILICA; NANOTUBES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.3606

Publication date: March 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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