Langmuir-Blodgett alternate multilayers

Figure 6.6. Langmuir-Blodgett alternating multilayer with C v symmetry.

Figure 6.11. Langmuir-Blodgett alternate multilayers with hyperpolarizabilities associated with the individual layers and the multilayer according to Neal...

Luminescent multilayer systems have been reported extensively in Langmuir-Blodgett studies however, reports of intrinsically luminescent self-assembled multilayers are far rarer. Bard has reported on an intriguing luminescent multilayer comprised of alternate layers of 1,6-hexane dithiols and Cu ions (see Figure 5.59),... 

Non-centrosymmetric Langmuir-Blodgett multilayers were also prepared by alternate deposition of nitrophenylhydrazone (dye FA06) and trimethylsilylcel-lulose (TMSC) [85]. Such waveguides had a relatively low loss of 3.5 dB cm 1 at 633 nm and the nonlinear material exhibited a reasonable of 19 pm V. With a fundamental wavelength of 1064 nm, a conversion efficiency of 10 4, corresponding to slope of the order of 10 8% W em 1 was demonstrated and further work was proposed to diminish the optical losses. 

The formation of multilayer structure can be carried out by several ways 1) adsorption on liquid/liquid interface - Langmuir-Blodgett films [5,6] 2) adsorption on solid/liquid interface - alternate adsorption of oppositely charged polyelectrolytes (PE) and surfactants on flat surfaces or spherical particles [7,8], To control the process of multilayer systems formation, it is necessary to under-... 

The Langmuir-Blodgett (LB) technique is one of the most conventional methods of nano-film fabrication. The polyion complex technique [221] was proposed to immobilize water-soluble bilayer forming amphiphiles and counter-charged polymers as polymeric LB films. Water-insoluble polyion complexes are formed at the air/water interface when the charged amphiphiles are directly spread on the surface of the aqueous polyelectrol 4 e solution. Alternative multilayers of the polymer and the amphiphile with stoichiometric ion pairing can be deposited onto solid substrates by the conventional LB technique [222]. The principle of the... 

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