Optical trigger based on the molecules of bacteriorhodopsin adsorbed on AgBr nanocrystalsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:is well known that light absorption triggers transformation chain of bacteriorhodopsin (bR). Protein goes through the intermediate states which usually are denoted in alphabetic order: K,L,M,N, and O. These transformations and electric potential changes correlated with them occur in 10 ps. The value of electric potential photoinduced by bR molecules on single membrane is 100 mV. The energy is stored electrostatically in accordance with the mechanisms of molecular condenser appearing under flash action. To obtain high photopotentials (up to 10-12 V) it is necessary to use packs of oriented membranes of bR molecules. We propose to use the molecules of bR adsorbed on silver halide crystals to overcome the threshold of spontaneous nucleation from small silver specks to colloidal ones in very short-time interval. Earlier we demonstrated the kinetic curves of the chemical development process for ultrafine-g rained emulsion. Colloidal silver particles appeared to lead to effective scattering and absorption of actinic light. Such systems can be considered in the framework of integrated chemical systems. Copyright (c) 2008 John Wiley & Sons, Ltd.