Nanometer-Scale Phase Separation and Preferential Solvation in THF–Water Mixtures: Ultrafast Electron Hydration and Recombination Dynamics Following CTTS Excitation of I–

2011 ◽  
Vol 2 (21) ◽  
pp. 2797-2804 ◽  
Author(s):  
Arthur E. Bragg ◽  
Godwin U. Kanu ◽  
Benjamin J. Schwartz
Author(s):  
Christopher Booth-Morrison ◽  
Yang Zhou ◽  
Ronald D. Noebe ◽  
David N. Seidman

1987 ◽  
Vol 114 ◽  
Author(s):  
J. C. Qian ◽  
E. E. Lachowski ◽  
F. P. Glasser

ABSTRACTFly ash consists of mixtures of crystalline substances in a glassy matrix. This matrix is itself inhomogeneous. The combustion process gives rise to compositional fluctuations typically on a micrometer scale; these fluctuations are preserved in the glass and are gradational. However, high-resolution transmission electron microscopy of Class F ash also reveals the existence of interfaces on a nanometer scale. These arise as a consequence of phase separation. Textures and interfaces typical of spinodal decomposition and possibility also suggestive of classical immiscibility have been observed. It is believed that the occurrence of phase separation resulting in nanometer-scale inhomogeneities will be a feature common to most Class F glasses. The consequences of this complex microstructure to reactivity are not as yet known, but some speculations are presented.


2001 ◽  
Vol 665 ◽  
Author(s):  
A. C. Arias ◽  
J. D. MacKenzie ◽  
N. Corcoran ◽  
R. H. Friend

ABSTRACTInvestigations on microscopic and photovoltaic properties of polyfluorene blends are presented here. The length scale of lateral phase separation is manipulated by control of solvent evaporation conditions. Photoluminescence efficiency measurements show that charge transfer is more effective in blends phase separated on the nanometer scale. Vertically segregated structures are obtained by a combination of solution viscosity and spin coating conditions. The external quantum efficiency of photovoltaic devices fabricated with vertically segregated blend is found to be 4 times higher than that of devices made with laterally segregated blends.


Langmuir ◽  
1998 ◽  
Vol 14 (9) ◽  
pp. 2348-2351 ◽  
Author(s):  
Shin-ichiro Imabayashi ◽  
Narutoshi Gon ◽  
Takayuki Sasaki ◽  
Daisuke Hobara ◽  
Takashi Kakiuchi

2008 ◽  
Vol 83 (1) ◽  
pp. 17009 ◽  
Author(s):  
S. Rößler ◽  
S. Ernst ◽  
B. Padmanabhan ◽  
Suja Elizabeth ◽  
H. L. Bhat ◽  
...  

1996 ◽  
Vol 7 (4) ◽  
pp. 438-442 ◽  
Author(s):  
S J Stranick ◽  
S V Atre ◽  
A N Parikh ◽  
M C Wood ◽  
D L Allara ◽  
...  

2009 ◽  
Vol 1177 ◽  
Author(s):  
Michael Wang

AbstractNanometer-scale patterns may form as one or more chemical components deposit on a solid substrate. This self-assembly process can be described by a set of nonlinear integral-differential diffusion equations accounting for two opposing factors: phase separation to minimizing Gibb's free energy in individual surface phases and reduction in phase boundaries to minimize surface energy created by phase separation. I here present a desktop computer program that allows us to interactively simulate self-assembly of nanometer-scale surface patterns. In particular, this program provides a convenient tool for studying the effects of temperature variations and preexisting patterns on the self-assembly process. Computer simulations show that an increase in temperature may enlarge pattern sizes and can eventually lead to the disappearance of the patterns.


2019 ◽  
Vol 802 ◽  
pp. 166-172
Author(s):  
Y. Tang ◽  
X.D. Wang ◽  
Q.P. Cao ◽  
S.Y. Liu ◽  
D.X. Zhang ◽  
...  

2015 ◽  
Vol 49 (8) ◽  
pp. 4995-5002 ◽  
Author(s):  
Rachel E. O’Brien ◽  
Bingbing Wang ◽  
Stephen T. Kelly ◽  
Nils Lundt ◽  
Yuan You ◽  
...  

1994 ◽  
Vol 98 (31) ◽  
pp. 7636-7646 ◽  
Author(s):  
S. J. Stranick ◽  
A. N. Parikh ◽  
Y.-T. Tao ◽  
D. L. Allara ◽  
P. S. Weiss

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