Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-1173
Title: Tuning the aspect ratio of arrays of silica nanochannels
Authors : Zucchetto, Nicola
Brühwiler, Dominik
Published in : RSC Advances
Volume(Issue) : 5
Issue : 91
Pages : 74638
Pages to: 74644
Issue Date: 2015
Language : Englisch / English
Subject (DDC) : 540: Chemie
Abstract: Arrays of silica nanochannels (ASNCs) are ordered mesoporous silica particles with hexagonal prismatic shape. The entrances of the well-defined one-dimensional nanochannels are located on the base surfaces of the hexagonal prisms. The aspect ratio of the micrometer-sized particles (length-to-diameter ratio) can be tuned in the range of 0.8 to 2.2 by the addition of co-ions (K+ and Ca2+) to the hexadecyltrimethylammonium bromide (CTAB) templated synthesis and by an adjustment of the relative amounts of silica precursor (tetraethoxysilane) and CTAB. The length of the nanochannels can be varied between 2 and 9 μm. Co-ions thereby not only improve the regularity of the hexagonal prismatic particle shape, but also affect the diameter of the nanochannels, which lies at approximately 2.6 nm (with K+ as co-ion) and 3.2 nm (with Ca2+ as co-ion).
Departement: Life Sciences und Facility Management
Organisational Unit: Institut für Chemie und Biotechnologie (ICBT)
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
DOI : 10.1039/C5RA16913E
10.21256/zhaw-1173
ISSN: 2046-2069
URI: https://digitalcollection.zhaw.ch/handle/11475/1170
Appears in Collections:Publikationen Life Sciences und Facility Management

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