Corrigendum to’ X-ray diffraction and secondary ion mass spectrometry investigations of GaN films grown on (0 0 1) and (1 1 0) MgF2 substrates by plasma-assisted molecular beam epitaxy (PA-MBE)’. Materials science in semiconductor processing 119 (2020) 105,262

AbstractThe deformation mode and defect structure of Al_ x Ga_1 – x N:Si epitaxial layers ( x = 0–0.7) grown by molecular beam epitaxy and doped with Si under a constant silane flux are studied by X-ray diffractometry. The concentration of Si atoms in the layers measured by secondary ion mass spectrometry is (4.0–8.0) × 10^19 cm^–3. It is found that the lateral residual stresses are compressive at x < 0.4 and become tensile at x > 0.4. The stresses after the end of growth are estimated and the contribution to the deformation mode of the layers of both the coalescence of nuclei of the growing layer and misfit stresses in the layer–buffer system are discussed. It is found that the density of vertical screw and edge dislocations are maximal at x = 0.7 and equal to 1.5 × 10^10 and 8.2 × 10^10 cm^–2, respectively.

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Characterization and Structure–Property Relationships of Organic–Inorganic Hybrid Composites Based on Aluminum–Magnesium Hydroxycarbonate and Azo Chromophore

Molecules ◽

10.3390/molecules24050880 ◽

2019 ◽

Vol 24 (5) ◽

pp. 880 ◽

Cited By ~ 7

Author(s):

Anna Marzec ◽

Bolesław Szadkowski ◽

Jacek Rogowski ◽

Waldemar Maniukiewicz ◽

Marian Zaborski

Keyword(s):

Mass Spectrometry ◽

Azo Dye ◽

Secondary Ion Mass Spectrometry ◽

Hybrid Composites ◽

Structure Property ◽

X Ray Diffraction ◽

X Ray ◽

Tof Sims ◽

Ion Mass Spectrometry ◽

Secondary Ion

In this study, novel organic–inorganic composites were prepared by the complexation of dicarboxylic azo dye (AD) with aluminum–magnesium hydroxycarbonate (AlMg–LH). This procedure provides an effective method for the stabilization of dicarboxylic organic chromophores on an AlMg−LH host. The structures of the hybrid composites were examined by X-ray diffraction (XRD), secondary ion mass spectrometry (TOF-SIMS), 27-Al solid-state nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA) and scanning transmission electron microscopy (STEM). The TOF-SIMS method was applied to investigate the metal–dye interactions and to monitor the thermal stability of the organic–inorganic complexes. Secondary ion mass spectrometry confirmed the presence of a characteristic peak for C18H10O5N2Mg22+, indicating that both carboxylic groups interacted with AlMg−LH by forming complexes with two Mg2+ ions. Modification with hybrid pigments affected the crystal structure of the AlMg−LH mineral, as shown by the appearance of new peaks on the X-ray diffraction patterns. Adsorption of the dicarboxylic chromophore not only led to significantly enhanced solvent resistance but also improved the thermal and photostability of the hybrid pigments. We propose a possible arrangement of the azo dye in the inorganic matrix, as well as the presumed mechanism of stabilization.

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