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2017-06-20
18:26
[PUBDB-2017-05670] Journal Article
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Structural stability of high entropy alloys under pressure and temperature
ddc:530
The stability of high-entropy alloys (HEAs) is a key issue before their selection for industrial appli-cations. In this study,in-situhigh-pressure and high-temperature synchrotron radiation X-raydiffraction experiments have been performed on three typical HEAs Ni20Co20Fe20Mn20Cr20,Hf25Nb25Zr25Ti25, and Re25Ru25Co25Fe25(at. [...]
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2017-06-20
13:22
[PUBDB-2017-05548] Journal Article
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High-speed fixed-target serial virus crystallography
ddc:570
We report a method for serial X-ray crystallography at X-ray free-electron lasers (XFELs), which allows for full use of the current 120-Hz repetition rate of the Linear Coherent Light Source (LCLS). Using a micropatterned silicon chip in combination with the high-speed Roadrunner goniometer for sample delivery, we were able to determine the crystal structures of the picornavirus bovine enterovirus 2 (BEV2) and the cytoplasmic polyhedrosis virus type 18 polyhedrin, with total data collection times of less than 14 and 10 min, respectively. [...]
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2017-06-15
12:49
[PUBDB-2017-05074] Journal Article
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Quantifying Angular Correlations between the Atomic Lattice and the Superlattice of Nanocrystals Assembled with Directional Linking
Nano letters 17(6), 3511 - 3517 (2017) [10.1021/acs.nanolett.7b00584]  GO
ddc:540
We show that the combination of X-ray scatteringwith a nanofocused beam and X-ray cross correlation analysis is anefficient way for the full structural characterization of mesocrystallinenanoparticle assemblies with a single experiment. We analyze severalhundred diffraction patterns at individual sample locations, that is,individual grains, to obtain a meaningful statistical distribution of thesuperlattice and atomic lattice ordering. [...]
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2017-06-09
15:23
OpenAccess [PUBDB-2017-04626] Journal Article
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Generating circularly polarized radiation in the extreme ultraviolet spectral range at the free-electron laser FLASH
ddc:530
A new device for polarization control at the free electron laser facility FLASH1 at DESY has been commissioned for user operation. The polarizer is based on phase retardation upon reflection off metallic mirrors. [...]
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2017-06-09
10:18
OpenAccess [PUBDB-2017-04582] Journal Article
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Compressional pathways of α-cristobalite, structure of cristobalite X-I, and towards the understanding of seifertite formation
ddc:500
In various shocked meteorites, low-pressure silica polymorph α-cristobalite is commonly found in close spatial relation with the densest known SiO2 polymorph seifertite, which is stable above ∼80 GPa. We demonstrate that under hydrostatic pressure α-cristobalite remains untransformed up to at least 15 GPa [...]
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2017-06-08
15:51
[PUBDB-2017-04548] Contribution to a conference proceedings/Contribution to a book
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Nanostructured graphene on cubic-SiC: synthesis, structure and transport properties
Atomically Controlled Surfaces, Interfaces and Nanostructures
13th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures, ACSIN 2016, Meeting locationFrascati, Rome, Italy, 9 Oct 2016 - 14 Oct 20162016-10-092016-10-14
Science Series 9, 25-26 (2016)
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2017-06-02
13:56
[PUBDB-2017-04214] Journal Article
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Stability of a Bifunctional Cu-Based Core@Zeolite Shell Catalyst for Dimethyl Ether Synthesis Under Redox Conditions Studied by Environmental Transmission Electron Microscopy and In Situ X-Ray Ptychography
ddc:570
When using bifunctional core@shell catalysts, the stability of both the shell and core–shell interface is crucial for catalytic applications. In the present study, we elucidate the stability of a CuO/ZnO/Al$_2$O$_3$@ZSM-5 core@shell material, used for one-stage synthesis of dimethyl ether from synthesis gas. [...]
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2017-06-01
17:27
OpenAccess [PUBDB-2017-04174] Report/Contribution to a book
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Enabling a new class of electronic devices - Using self-aligned nanodomain boundaries to open a charge transport gap in trilayer graphene
[Photon Science Annual Report 2015]
Photon Science 2015. Highlights and Annual Report
Seminar, Verlag Deutsches Elektronen-Synchrotron Hamburg, Meeting locationHamburg, Germany,
44-45 (2015) [10.3204/PUBDB-2017-04174]  GO
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2017-05-30
14:54
OpenAccess [PUBDB-2017-03986] Contribution to a conference proceedings/Contribution to a book
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HR-TEM and HR-PES studies of metal nanoparticles in organic molecular thin film
Atomically Controlled Surfaces, Interfaces and Nanostructures
13th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures, ACSIN 2016, Meeting locationFrascati, Rome, Italy, Italy, 9 Oct 2016 - 14 Oct 20162016-10-092016-10-14
Science Series 9, 206-207 (2016) [10.3204/PUBDB-2017-03986]  GO
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2017-05-29
10:16
[PUBDB-2017-03792] Journal Article
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Ultra-stiff metallic glasses through bond energy density design
ddc:530
The elastic properties of crystalline metals scale with their valence electron density. Similar observations have been made for metallic glasses [...]
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