Molecular electronic devices

Traditional appHcations for latices are adhesives, binders for fibers and particulate matter, protective and decorative coatings (qv), dipped goods, foam, paper coatings, backings for carpet and upholstery, modifiers for bitumens and concrete, and thread and textile modifiers. More recent appHcations include biomedical appHcations as protein immobilizers, visual detectors in immunoassays (qv), as release agents, in electronic appHcations as photoresists for circuit boards, in batteries (qv), conductive paint, copy machines, and as key components in molecular electronic devices. 

Therefore, investigators have shown considerable interest in the adoption of the Langmuir-Blodgett technique, or its modifications, to make molecular electronic devices using, in particular, as an active component, a light-transducing protein, such as BR. In fact, the ability of BR to form thin films with excellent optical properties and the intrinsic properties themselves make it an outstanding candidate for use in optically coupled devices. 

Aviram, A., Seiden, P., Ratner, M. A., in Molecular Electronic Devices, Carter, F. L. (ed.), New York—Basel, Marcel Dekker 1983... 

Xue Y, Datta S, Ratner MA (2002) First-principles based matrix Green s function approach to molecular electronic devices general formalism. Chem Phys 281(2—3) 151—170... 

Carter FL (1983) Molecular level fabrication techniques and molecular electronic devices. J Vac Sci Technol B l(4) 959-968... 

To extract useful results from a molecular electronic device, or just to measure its electronic characteristics, connections must be made to macroscopic probes. That is, metallic electrodes must interface to different ends of the molecule of interest. An experiment may interrogate a single molecule, or may measure a one-molecule-thick layer, i.e., a monolayer, of the molecules of interest, provided all the molecules are oriented in the same direction. In either case, several questions arise. What is the nature of the contact between metal and molecule(s) What metal should be chosen, and what should be the form or shape of this electrode ... 

Chen J, Reed MA, Rawlett AM, Tour JM (1999) Large on-off ratios and negative differential resistance in a molecular electronic device. Science 286 1550-1552... 

Moreover, tunneling spectra from single molecules can be obtained (see below). Thus, tunneling spectroscopy is an excellent tool to address fundamental questions about the molecular layer or single molecule in a molecular electronic device. 

Mathias K, Jun J, Yi L (2008) A molecular view on electron transport in molecular electronic devices. J Comput Theor Nanosci 5 401—421... 

Jiang J, Kula M, Luo Y (2006) A generalized quantum chemical approach for elastic and inelastic electron transports in molecular electronics devices. J Chem Phys 124 034708-034710... 

Phthalocyanines (Pc) are attractive materials for their potential functions including the semiconductive behaviours in addition to the thermal and chemical stabilities. In particular, control of orientation of the Pc macrocycles in thin films is expected to provide novel molecular electronic devices. Previously, we have found that copper tetrakis(butoxycarbonyl) Pc is oriented nearly perpendicular to the surface and also the dipping direction in the LB films [46], while octa-alkyl Pc derivatives [H2Pc(R)8, CuPc(R)a R = CnH2n+i. n=7,9,11] take the orientation with Pc macrocycles nearly parallel to the plane of films deposited by the horizontal lifting method to form a non-alternating X-type film [47], as illustrated schematically in... 

F. L. Carter, Electron tunneling in short periodic arrays, in Molecular Electronic Devices, F. L. Carter, Ed., Marcel Dekker, New York, 1982, pp. 121-136. 

S. Tuchman, S. Sideman, S. Kenig, and N. Lotan, Enzyme based logic gates controlled by outside signals principles and design, in Molecular Electronics and Molecular Electronic Devices, K. Sienicki, Ed., Vol. HI, CRC Press, Boca Raton, FL, 1994, pp. 223-238. 

Let us consider molecular switches based on intramolecular electronic transition. Generally, transfer of energy or an electron within a molecule proceeds in femtoseconds. The aim is to produce molecular electronic devices that respond equally rapidly. Molecular switches that employ optically controlled, reversible electron-transfer reactions sometimes bring both speed and photostability advantages over molecular switches which are usually based on photochemical changes in their molecular structure. Important examples are the molecnlar switches depicted in Scheme 8.3 (Debreczeny et al. 1996). 

The motivation for studies to measure the electrical properties of individual DNA molecules is generated by the necessity to map these properties and the electrical behaviour of DNA molecules for the design of future molecular electronic devices, for which DNA would be a promising material. 

Feldman AK, Steigerwald ML, Guo X et al (2008) Molecular electronic devices based on single-walled carbon nanotube electrodes. Acc Chem Res 41 1731-1741... 

Seitz O, Dai M, Aguirre-Tostado FS, Wallace RM, Chabal YJ (2009) Copper-metal deposition on self assembled monolayer for making top contacts in molecular electronic devices. J Am Chem Soc 131(50) 18159-18167... 

Molecular Electronics Devices-, Carter, F. L. Siatkowski, R. E. Wohltjen, H., Eds. North-Holland Amsterdam, 1988 Bard, A. J. Integrated Chemical Systems-. Wiley New York, 1995. 

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