Formation of {111} oriented domains during the sputtering epitaxy growth of (001) oriented Iridium films.

In the wafer-scale growth of Ir(001) on yttria-stabilized zirconia (YSZ) by magnetron sputtering epitaxy two kinds of {111} oriented domains are observed. One consists of sharp "fjord"-shaped features in which four 90° alternated rotational variants of {111} are possible and the second one consists of islands with less defined shapes in which eight 45° alternated rotational variants can be found. Their formation occurs directly at the Ir/YSZ interface along incoherent grain boundaries, likely nucleating at local defects of the YSZ surface. In order to avoid these misoriented domains, process separation and proper etching pretreatment of the wafers both before and between the sputtering processes have been found to be the key strategy for achieving reproducibility and overall better material quality.

A psychometric evaluation of the Standardized Assessment of Severity of Personality Disorder (SASPD) in nonclinical and clinical German samples.

The Standardized Assessment of Severity of Personality Disorder (SASPD) is a 9-item self-report screening instrument and was developed to assess personality disorder (PD) severity according to the initial proposal of ICD-11. Our aim was to investigate the psychometric properties of the German version of the SASPD in nonclinical and clinical samples. A total of 1,991 participants (N = 888 from nonclinical and N = 1,103 from clinical samples) provided ratings on the SASPD as well as other measures of psychopathology and personality. We examined the SASPD regarding its factor structure, internal consistency, and construct validity. A unidimensional structure of the SASPD provided inadequate model fit, whereas a 3-factor solution provided good fit in both the nonclinical and clinical samples. Internal consistency of the SASPD total score was acceptable in the clinical and nonclinical samples based on this multifactorial model. In terms of convergent validity, SASPD scores correlated fairly with other measures of PD severity across samples. Discriminant validity with measures of general symptom distress and measures of (normal) personality traits was mixed. In addition, the SASPD scores predicted levels of PD severity above and beyond a measure of symptom distress. The SASPD captures some theoretically expected features of PD severity. However, the multidimensional structure and limited convergent and discriminant validity may hamper future usage of the SASPD as a short screening tool of PD severity according to ICD-11. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Atomic Layer Deposition of Cobalt Phosphide for Efficient Water Splitting.

Transition-metal phosphides (TMP) prepared by atomic layer deposition (ALD) are reported for the first time. Ultrathin Co-P films were deposited by using PH3 plasma as the phosphorus source and an extra H2 plasma step to remove excess P in the growing films. The optimized ALD process proceeded by self-limited layer-by-layer growth, and the deposited Co-P films were highly pure and smooth. The Co-P films deposited via ALD exhibited better electrochemical and photoelectrochemical hydrogen evolution reaction (HER) activities than similar Co-P films prepared by the traditional post-phosphorization method. Moreover, the deposition of ultrathin Co-P films on periodic trenches was demonstrated, which highlights the broad and promising potential application of this ALD process for a conformal coating of TMP films on complex three-dimensional (3D) architectures.

Electron microscope analyses of the bio-silica basal spicule from the Monorhaphis chuni sponge.

We report on a structural analysis of several basal spicules of the deep-sea silica sponge Monorhaphis chuni by electron microscope techniques supported by a precise focused ion beam (FIB) target preparation. To get a deeper understanding of the spicules length growth, we concentrated our investigation onto the apical segments of two selected spicules with apparently different growth states and studied in detail permanent and temporary growth structures in the central compact silica axial cylinder (AC) as well as the structure of the organic axial filament (AF) in its center. The new findings concern the following morphology features: (i) at the tip we could identify thin silica layers, which overgrow as a tongue-like feature the front face of the AC and completely fuse during the subsequent growth state. This basically differs from the radial growth of the surrounding lamellar zone of the spicules made of alternating silica lamellae and organic interlayers. (ii) A newly detected disturbed cylindrical zone in the central region of the AC (diameter about 30 µm) contains vertical and horizontal cavities, channels and agglomerates, which can be interpreted as permanent leftover of a formerly open axial channel, later filled by silica. (iii) The AF consists of a three-dimensional crystal-like arrangement of organic molecules and amorphous silica surrounding these molecules. Similar to an inorganic crystal, this encased protein crystal is typified by crystallographic directions, lattice planes and surface steps. The 〈001〉 growth direction is especially favored, thereby scaffolding the axial cylinders growth and consequently the spicules' morphology.

A perfectly periodic three-dimensional protein/silica mesoporous structure produced by an organism.

The discovery of perfectly ordered 3D mesoporous protein/silica structure in the axial filament of the marine sponge Monorhaphis chuni is reported. The structure belongs to body-centered tetragonal symmetry system (a=9.88 nm, c=10.83 nm) and comprises interconnecting lattices of protein and silica, templated by the self-assembled, enzymatically active protein-silicatein, whose primary function is the precipitation of silica.

Validation of three-dimensional diffraction contrast tomography reconstructions by means of electron backscatter diffraction characterization.

Microstructure reconstructions resulting from diffraction contrast tomography data of polycrystalline bulk strontium titanate were reinvestigated by means of electron backscatter diffraction (EBSD) characterization. Corresponding two-dimensional grain maps from the two characterization methods were aligned and compared, focusing on the spatial resolution at the internal interfaces. The compared grain boundary networks show a remarkably good agreement both morphologically and in crystallographic orientation. Deviations are critically assessed and discussed in the context of diffraction data reconstruction and EBSD data collection techniques.