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On the TEM and AFM Evidence of Zeosil Nanoslabs Present during the Synthesis of Silicalite-1

Authors

  • Harikrishnan Ramanan Dr.,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Ave SE, Minneapolis, MN 55455-0132, USA, Fax: (+1) 612-626-7246
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  • Efrosini Kokkoli Prof.,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Ave SE, Minneapolis, MN 55455-0132, USA, Fax: (+1) 612-626-7246
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  • Michael Tsapatsis Prof.

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Ave SE, Minneapolis, MN 55455-0132, USA, Fax: (+1) 612-626-7246
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  • We thank Carol M. Garland of the California Institute of Technology for assistance in the EDX work, Raman Ravishankar and Griselda Bonilla for assistance in the synthesis and gratefully acknowledge the financial support for this work from the National Science Foundation and the Nanoscale Interdisciplinary Research Team (NIRT) grants NSF CTS-0091406 and NSF NIRT CTS-0103010. We acknowledge the W. M. Keck Electron Microscopy facility at the University of Massachusetts, Amherst for the usage of the JEOL JEM 3010 microscope and the Keck Engineering laboratory at the California Institute of technology, Pasadena for the use of the Philips EM 430 microscope. Prof. J. A. Martens and Dr. Christine Kirschhock provided the images shown in Figure 1 a and Figure 2 a.

Abstract

original image

Nanoslabs (1): Investigations of the mechanism of formation of tetrapropylammonium (TPA)-silicalite-1 by TEM and atomic force microscopy (AFM) analysis (see picture) are not consistent with the existence of “nanoblocks” or “nanoslabs” previously proposed by J. A. Martens and co-workers

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