Zobrazeno 1 - 10
of 322
pro vyhledávání: '"W.S. Howells"'
Publikováno v:
The Journal of Physical Chemistry B. 110:13786-13792
The microscopic behavior of fresh and freeze-dried strawberry and red onion at different water contents (45 and 20 wt % water) has been investigated by quasielastic neutron scattering (QENS). To distinguish between the dynamics of the water and the b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15e2b80432e6d6fed82a0710305e25e6
https://doi.org/10.1021/jp060019+
https://doi.org/10.1021/jp060019+
Autor:
W.S. Howells, Göran Wahnström, Charbel Tengroth, Dennis Engberg, P. Carlsson, Lars Börjesson, Peter Ahlström
Publikováno v:
Soft Materials. 3:1-20
The relaxation properties of poly(propylene oxide) at temperatures above the glass‐transition temperature are studied by quasi‐elastic neutron scattering and molecular dynamics (MD) simulations. The contributions to the dynamic structure factor f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d6e62da5260e1e1d1a1f2fb31d444f7
https://doi.org/10.1080/15394450500408934
https://doi.org/10.1080/15394450500408934
Publikováno v:
The Journal of Chemical Physics. 121:12026-12037
The structure of an amorphous polymer electrolyte, poly(propylene oxide) (PPO) complexed with LiClO4, has been studied using reverse Monte Carlo (RMC) simulations. The simulations require no force field but are based on experimental data only, in thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29c12895dd8493418dbaf424212bb7ab
https://doi.org/10.1063/1.1815295
https://doi.org/10.1063/1.1815295
Publikováno v:
The Journal of Chemical Physics. 118:4206-4212
The microscopic polymer dynamics in nanocomposite polymer electrolytes has been investigated using quasielastic neutron scattering experiments. Four samples based on the fully amorphous copolymer trihydroxy poly(ethylene oxide-co-propylene oxide) (3P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07e80ce717c19808d26d7d47aa9df2b0
https://doi.org/10.1063/1.1540980
https://doi.org/10.1063/1.1540980
Autor:
W.S. Howells, Jan Swenson
Publikováno v:
The Journal of Chemical Physics. 117:857-865
The dynamics of propylene glycol (PG) and its 7-mer confined in a Na-vermiculite clay have been investigated by quasielastic neutron scattering. Experiments were carried out in the temperature range 300–420 K and in two different scattering geometr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cca5eb3d9da18369259ac0b098f15abe
https://doi.org/10.1063/1.1483071
https://doi.org/10.1063/1.1483071
Autor:
J. L. Touron, Narcis Clavaguera, M.T. Clavaguera-Mora, W.S. Howells, D. Jacovkis, Javier Rodríguez-Viejo
Publikováno v:
Journal of Non-Crystalline Solids. 287:162-166
The kinetics of transformation of the melt spun Al 87 Ni 7 Nd 3 Cu 3 alloy was analysed by differential scanning calorimetry (DSC) and neutron diffraction (ND) experiments. The study of the emerging nanocrystalline grained structure by in situ heat t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7191d5f37f089da5899ff48877754667
https://doi.org/10.1016/s0022-3093(01)00551-8
https://doi.org/10.1016/s0022-3093(01)00551-8
Publikováno v:
Physica B: Condensed Matter. 301:28-34
We have investigated the dynamics of confined water in an Na-vermiculite clay by combining quasi-elastic neutron scattering (QENS) and neutron resonance spin-echo (NRSE) experiments in order to cover a large dynamical window. The QENS study of the fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::188f8b9106f6d908057825823841e8a3
https://doi.org/10.1016/s0921-4526(01)00494-x
https://doi.org/10.1016/s0921-4526(01)00494-x
Publikováno v:
The journal of chemical physics 114, 9645-9656 (2001).
segments. We find that the relaxation of the correlation between neighboring chains is slower and more stretched in the polymer salt complex compared to the pure polymer. The data can, for both PPO and PPO‐LiClO4, be described by a stretched expone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bcfc41660075badf01816380515a179
https://doi.org/10.1063/1.1370073
https://doi.org/10.1063/1.1370073
Publikováno v:
Journal of Physics: Condensed Matter. 13:2425-2436
The atomic motion of Ag+ ions in superionic and liquid Ag2Se and Ag2Te has been investigated by coherent quasi-elastic neutron scattering. The presence of a Q-dependent broadening of the quasielastic peak indicates that the Ag+ ion is mobile in the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70646d6fda3760955a3aaa42c30f970b
https://doi.org/10.1088/0953-8984/13/11/301
https://doi.org/10.1088/0953-8984/13/11/301
Publikováno v:
Solid State Ionics. :1055-1060
The structures of ion conducting mixed-alkali metaphosphate glasses (A 2 O) x –(B 2 O) 1− x –P 2 O 5 (A,B=Li,Na,Rb) have been examined by neutron diffraction and Raman spectroscopy. The results show that the short range order of the phosphorous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d5fa86c9be46ff8fec658190532cfa5
https://doi.org/10.1016/s0167-2738(00)00527-0
https://doi.org/10.1016/s0167-2738(00)00527-0