Time-resolved self-assembly

Mandelkow, E., Lange, G., Mandelkow, E.-M. Applications of Synchrotron Radiation to the Study of Biopolymers in Solution Time-Resolved X-Ray Scattering of Microtubule Self-Assembly and Oscillations. 151, 9-29 (1989). 

Billsten HH, Sundstrom V, and Polivka T. 2005. Self-assembled aggregates of the carotenoid zeaxanthin Time-resolved study of excited states. Journal of Physical Chemistry A 109(8) 1521-1529. 

Time-resolved in situ Small Angle Neutron Scattering (SANS) investigations have provided direct experimental evidence for the initial steps in the formation of the SBA-15 mesoporous material, prepared using the non-ionic tri-block copolymer Pluronic 123 and TEOS as silica precursor. Upon time, three steps take place during the cooperative self-assembly of the Pluronic micelles and the silica species. First, the hydrolysis of TEOS is completed, without modifications of the Pluronic spherical micelles. Then, when silica species begin to interact with the micelles, a transformation from spherical to cylindrical micelles takes place before the precipitation of the ordered SBA-15 material. Lastly, the precipitation occurs and hybrid cylindrical micelles assemble into the two-dimensional hexagonal structure of SBA-15. 

In excerpt I5D, Walker begins with a statement of the topic (solvation at hydrophobic and hydrophilic solid-liquid interfaces) and then moves directly to the signihcance of the work. He emphasizes the need for information on interfacial phenomena and points out possible applications of his work for other areas of science (molecular recognitions, electron transfer, and macromolecular self-assembly). He goes on to describe his experimental methods, focusing on three aspects of his approach (in order of difficulty) equilibrium measurements, time-resolved studies, and distance-dependent measurements of solvation strength. 

UV/visible absorbance measurements of H2S-exposed M-FA films (M = Cd or Hg) have provided information about reaction rates. Delineation of the two processes depicted in Eq. (7) and (8) is difficult, however, as they can occur simultaneously. The reactions of LB films (CdAr) and cast self-assembled films of the cadmium salt of ditetradecyl-iY-[4-([6-/V, Ar, Ar -trimelhylethylenediamino)-hexyI oxy) benzoyl]-L-glulamate (Cd(DTG)2) with H2S have been followed by time-resolved UV/visible absorbance (85). The most profound observation from this investigation is with respect to the effect that water has on the rate of growth of the CdS particles... 

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