Growth of quantum-confined indium phosphide inside MCM-41
Article Abstract:
The incorporation of indium phosphide semiconductor inside MCM-41 materials via metal organic chemical vapor deposition was studied using a range of analytical techniques. These include powder X-ray diffraction, solid-state NMR spectroscopy, high resolution transmission electron microscopy, nitrogen adsorption and UV/vis diffuse reflectance spectroscopy. The presence of large surface deposited indium phosphide particles and nanosized indium phosphide particles within the pores was indicated by line broadening in X-ray diffraction patterns, a result affirmed by high resolution transmission electron microscopy. Pore filling data were gleaned from nitrogen adsorption.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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31P magic-angle-turning NMR studies of the chemical and electronic nature of phosphorus in magnesium aluminophosphate MgAPO-20
Article Abstract:
31P magic-angle-turning nuclear magnetic resonance spectroscopy is used in studying the chemical and electronic structures of various phosphorus environments in microporous magnesium aluminophosphate (MgAPO-20). This spectroscopic method generates spectra describing isotropic chemical shifts and has been used in describing the P, Al and Si chemical environments in these inorganic materials. Results indicate the P(4Al) is highly symmetric and yields isotropic line shapes. The symmetry is distorted when Mg is introduced into the lattice which produces chemical shift anisotropy patterns.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Preparation and structure analysis of Co-Mo binary sulfide clusters encapsulated in an NaY zeolite
Article Abstract:
Co 2p X-ray photoelectron spectroscopy (XPS) and Mo and Co K-edge extended X-ray absorption fine structure (EXAFS) techniques were used to show the formation of Co-Mo binary sulfide clusters. The composition of the clusters wasCo2Mo2S6 based on XPS and X-ray fluorescence analyses. The structure of Co2Mo2S6 clusters was of the thiocubane type as suggested by Mo and Co K-edge EXAFS analysis. A density functional method was used to rationalize theoretical calculations of the thiocubane structure.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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