scholarly journals A neutron scattering perspective on the structure, softness and dynamics of the ligand shell of PbS nanocrystals in solution

2020 ◽  
Vol 11 (33) ◽  
pp. 8875-8884
Author(s):  
Tilo Seydel ◽  
Michael Marek Koza ◽  
Olga Matsarskaia ◽  
Alexander André ◽  
Santanu Maiti ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Neutron Scattering ◽  
Phonon Spectrum ◽  
Temperature Dependent ◽  
X Ray ◽  
X Ray Scattering ◽  
Pbs Nanocrystals ◽  
Ligand Shell ◽  
Shell Temperature ◽  
Ray Scattering

Time-averaged and energy-resolved neutron and X-ray scattering reveal the structure of the ligand shell, temperature-dependent diffusion and the phonon spectrum of PbS nanocrystals functionalized with oleic acid in solution.

Temperature-dependent small-angle x-ray scattering from poly(vinylidene fluoride)

1980 ◽  
Vol 51 (10) ◽  
pp. 5508 ◽  
Author(s):  
J. M. Schultz ◽  
J. S. Lin ◽  
R. W. Hendricks ◽  
R. R. Lagasse ◽  
R. G. Kepler
Keyword(s):  
Small Angle ◽  
Vinylidene Fluoride ◽  
Temperature Dependent ◽  
X Ray ◽  
X Ray Scattering ◽  
Poly Vinylidene Fluoride ◽  
Ray Scattering

Evidence of a single-q incommensurate phase in quartz by synchrotron X-ray diffraction

1988 ◽  
Vol 21 (1) ◽  
pp. 72-74 ◽  
Author(s):  
A. Zarka ◽  
B. Capelle ◽  
M. Petit ◽  
G. Dolino ◽  
P. Bastie ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Uniaxial Stress ◽  
Incommensurate Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Good Agreement ◽  
Ray Scattering

X-ray scattering is used to demonstrate the existence in quartz of an incommensurate phase with a single modulation when a uniaxial stress is applied in the X Y plane. Good agreement with earlier neutron scattering experiments is found.

scholarly journals Supramolecular Dimerization in a Polymer Melt from Small-Angle X-ray Scattering and Rheology: A Miscible Model System

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 880
Author(s):  
Mariapaola Staropoli ◽  
Margarita Kruteva ◽  
Jürgen Allgaier ◽  
Andreas Wischnewski ◽  
Wim Pyckhout-Hintzen
Keyword(s):  
Hydrogen Bonding ◽  
Small Angle ◽  
Full Range ◽  
Polymer Melt ◽  
Self Healing ◽  
Temperature Dependent ◽  
Base Pairs ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

We present a structural and dynamic study on the simplest supramolecular hetero-association, recently investigated by the authors to prepare architectural homogeneous structures in the melt state, based on the bio-inspired hydrogen-bonding of thymine/diaminotriazine (thy–DAT) base-pairs. In the combination with an amorphous low Tg poly(butylene oxide) (PBO), no micellar structures are formed, which is expected for nonpolar polymers because of noncompatibility with the highly polar supramolecular groups. Instead, a clear polymer-like transient architecture is retrieved. This makes the heterocomplementary thy–DAT association an ideal candidate for further exploitation of the hydrogen-bonding ability in the bulk for self-healing purposes, damage management in rubbers or even the development of easily processable branched polymers with built-in plasticizer. In the present work, we investigate the temperature range from Tg + 20 °C to Tg + 150 °C of an oligomeric PBO using small-angle X-ray scattering (SAXS) and linear rheology on the pure thy and pure DAT monofunctionals and on an equimolar mixture of thy/DAT oligomers. The linear rheology performed at low temperature is found to correspond to fully closed-state dimeric configurations. At intermediate temperatures, SAXS probes the equilibrium between open and closed states of the thy–DAT mixtures. The temperature-dependent association constant in the full range between open and closed H-bonds and an enhancement of the monomeric friction coefficient due to the groups is obtained. The thy–DAT association in the melt is more stable than the DAT–DAT, whereas the thy–thy association seems to involve additional long-lived interactions.

Temperature dependent inelastic X-ray scattering of synchrotron radiation on myoglobin analyzed by the Mössbauer effect

1996 ◽  
Vol 25 (1) ◽  
pp. 43-46 ◽  
Author(s):  
K. Achterhold ◽  
C. Keppler ◽  
U. van Bürck ◽  
W. Potzel ◽  
P. Schindelmann ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Mössbauer Effect ◽  
Mossbauer Effect ◽  
Temperature Dependent ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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