Papers by Keyword: HF

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Authors: Enrico Bellandi, Mauro Alessandri, Francesco Pipia, A. Tonti
Authors: Mauro Alessandri, Enrico Bellandi, Francesco Pipia, F. Cazzaniga, K. Wolke, M. Schenkl
Authors: Jung Yup Kim, Jim McVittie, Krishna Saraswat, Yoshio Nishi
Authors: Wim Fyen, I. Teerlinck, Sebastien Lagrange, S.H. Brongersma, A. Steegen, Paul W. Mertens, Marc M. Heyns
Authors: F. Tardif, T. Lardin, I. Constant, M. Fayolle, Pieter Boelen, C. Cowache, Ismail Kashkoush, R. Novak
Authors: Ying Sun, Lan Ying Ge
Abstract: Aluminophosphate molecular sieve and Ni(II)-containing APO-5 materials were synthesized hydrothermally and characterized by various analytical and spectroscopic techniques. It indicates that the nickel ions with a divalent oxidation state can incorporate into the tetrahedral coordination in mesoporous aluminophosphate very well. The better crystallizing temperature is explored. A stronger crystalline form is obtained with the addition of HF. Further, microporous aluminophosphate molecular sieves and Ni(II) ions remain in a tetrahedral geometry even after calcination at 550 °C.
Authors: Martin Lommel, Philipp Hönicke, Michael Kolbe, Matthias Müller, Falk Reinhardt, Pit Möbus, Eric Mankel, Burkhard Beckhoff, Bernd O. Kolbesen
Abstract: The formation of self-assembled monolayers (SAMs) by specific organic molecules with appropriate anchor groups on semiconductor surfaces may be used to probe the chemical state and quality of the surface or to achieve surface passivation. Molecules with thiol anchor groups are able to bond to hydrogen-terminated germanium surfaces (Ge-S bond). We have prepared SAMs of alkylthiols with different head groups on germanium. Since the surface preparation of germanium is neither well understood nor developed, the controlled preparation of an oxide-free completely H-terminated surface which is a prerequisite for SAM formation of alkylthiols turned out to be a major challenge. Several approaches have been studied. The characterization of the germanium surface prior to and after SAMs formation has been performed by AFM, XPS, Synchrotron-TXRF and -NEXAFS.
Authors: Alessio Beverina, I. Guilmeau, J.P. Carrere, N. Emonet, F. Guyader, V. Huard, Sébastien Petitdidier, R. Velard
Authors: V. Bertagna, F. Rouelle, R. Erre, M. Chemla
Authors: Jia Qiong Wang, Fan Yu Kong
Abstract: To improve the shortcoming in bag filter design in China (mainly used in purification of HF in alumina electrolytic flue gas), necessity of basic theoretical study on bag-filter used in purification of alumina electrolytic flue gas is analyzed. Four study aspects are proposed , which includs flow field optimization, influences of bag length and process parameter on forming dust layer, properties of the dust layer adsorbing hydrogen. Some primary study is done. This will provide a reference for engineering design and process operation.
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