Langmuir Blodgett film-metal

CORNELIO AND GARDELLA Langmuir Blodgett Film—Metal Interfaces 381... 

CORNEUO AND GARDELLA Langmuir Blodgett Film-Metal Interfaces 383... 

DEVELOPMENT OF NOVEL CONDUCTIVE LANGMUIR-BLODGETT FILMS METALLIC PROPERTIES AND PHOTOCHEMICAL SWITCHING PHENOMENA... 

Kan, K. K., Roberts, G. G., Petty, M, C., Langmuir-Blodgett Film metal-insulator semiconductor structures on narrow-band gap semiconductors. Thin Solid Films, 99, No. 1-3, 291-296, 1983.. 

Langmuir-Blodgett films (LB) and self assembled monolayers (SAM) deposited on metal surfaces have been studied by SERS spectroscopy in several investigations. For example, mono- and bilayers of phospholipids and cholesterol deposited on a rutile prism with a silver coating have been analyzed in contact with water. The study showed that in these models of biological membranes the second layer modified the fluidity of the first monolayer, and revealed the conformation of the polar head close to the silver [4.300]. 

B. Langmuir-Blodgett Films Containing Metallic Nanoparticles... 

Production of Metallic Nanoparticles Inside Langmuir-Blodgett Films... 

As this volume attests, a wide range of chemistry occurs at interfacial boundaries. Examples range from biological and medicinal interfacial problems, such as the chemistry of anesthesia, to solar energy conversion and electrode processes in batteries, to industrial-scale separations of metal ores across interfaces, to investigations into self-assembled monolayers and Langmuir-Blodgett films for nanoelectronics and nonlinear optical materials. These problems are based not only on structure and composition of the interface but also on kinetic processes that occur at interfaces. As such, there is considerable motivation to explore chemical dynamics at interfaces. 

Nakamura T, Yunome G, Azumi R, Tanaka M, Tachibana H, Matsumoto M, Horiuchi S, Yamochi H, Saito G (1994) Structure and electrical properties of the metallic Langmuir-Blodgett film without secondary treatments. J Phys Chem 98 1882-1887... 

The results illustrated above show that the CFT method is suitable for making chemical-sensor measurements using both bulk polymers and, in particular, thin film materials that are intrinsically weak conductors. Therefore, the CFT looks premising for such materials as poly(phenylacetylene) derivatives 24., for which carefully shielded electrometer measurements have been required in the past because of current levels at the threshold of detectability. Furthermore, the fact that the CFT always makes AC measurements reduces the problem of DC polarization of electrodes. In addition, the CFT approach should be suitable for other "chemiresistor" applications, such as the metal-substituted phthalocyanines proposed by Jarvis et. al. 2 and for Langmuir—Blodgett films 26. which, because they are so thin, may prove impossible to use in parallel-plate form, but which can be routinely used with the high-sensitivity interdigi-tated-electrode approach provided by the CFT. 

Besides self-assembly on the surface of metals, another example of self-assembly is the formation of Langmuir-Blodgett monolayers on the surface or at the interface of liquids.47,48 One approach to molecular-based electronic devices that has made use of self-assembled Langmuir-Blodgett films is the crossbar-based defect-tolerant approach to molecular computing 49 Rotaxane molecules that depend on physical dislocations within the molecule to produce switching functionality have been designed such that they will... 

Contact mode hthography has been apphed most of all to hard materials mica [235], semiconductors [236, 237] and metals [238-240]. Langmuir-Blodgett films [241, 242] and thin polymer films [243-251] can also be structured in contact mode. 

Surface redox reactions — or surface -> electrode reactions, are reactions in which both components of the -> redox couple are immobilized on the electrode surface in a form of a -> monolayer. Immobilization can be achieved by means of irreversible -> adsorption, covalent bonding, self-assembling (- self-assembled mono-layers), adhesion, by Langmuir-Blodgett technique (- Langmuir-Blodgett films), etc. [i]. In some cases, the electrode surface is the electroactive reactant as well as the product of the electrode reaction is immobilized on the electrode surface, e.g., oxidation of a gold, platinum, or aluminum electrode to form metal oxide. This type of electrode processes can be also considered as surface electrode reactions. Voltammetric response of a surface redox reaction differs markedly from that of a dissolved... 

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