Transistor molecular

Fig. 6. Molecular transistor based on a microelectrode array. P is a polymer layer that can be switched conductive or nonconductive by the potential of the gate electrode (from ref.

Fig. 7. Solid state molecular transistor based on polyaniline bridged microelectrodes. PVA layer of polyvinyl alcohol 1 drain current Vg gate voltage rendering the polyaniline non-conductive Vg gate voltage switching on conductivity of the polyaniline layer (from ref.

The bridging polymer is a conducting poly(3-methyIthiophene) or polyaniline and the solid state redox conduction between all electrodes is accomplished by a common coating with poly(ethyleneoxide)/Li" CF3S03- or poly(vinyl alcohol)/ The polyaniline based molecular transistor proved as a very sensitive moisture detector it works well in a dry argon atmosphere but in water saturated argon the device cuts out... 

The newest addition to the forms of elemental carbon is the nanotube. A carbon nanotube is a long cylinder of carbon atoms, connected together in much the same way as in a fullerene. Both the diameter and the length of carbon nano-tubes can vary. Properties of nanotubes, such as their ability to conduct electrical charge, change dramatically with the dimensions of the tube. Carbon nanotubes are under intensive study. For example, a carbon nanotube laid down on a silicon chip forms a molecular transistor. Such devices may eventually lead to further miniaturization of the chips that are at the heart of modem computers. 

Perrine TM, Dunietz BD (2008) Conductance of a cobalt(II) terpyridine complex based molecular transistor a computational analysis. J Phys Chem A 112 2043-2048... 

Thus, the ideas behind the bottom-up approach are as simple as powerful. The general aim lies in the design of novel materials employable for molecular-scale electronics, such as molecular transistors, molecular photovoltaic applications, molecular display technology, etc. Hereby, the functions are carefully adjusted by synthetic tools to build up a certain chemical structure. In this context, we need to address the key steps/challenges in such a work-flow. With this in hands the impetus of this thesis should be illustrated. 

For a molecular transistor based on an asymmetric nitro-BDT molecular bridge, we have also found a strong nonlinear behavior in the I-V characteristics. Since the molecule is asymmetric, we have studied the current for... 

Figure 5.17 Schematic architecture of a molecular transistor based on a nitro-BDT type molecular bridge. The electric field is directed perpendicular to the plane of the benzene ring.

W.D. Wheeler, Yu. Dahnovsky, Molecular transistors based on BDT-type molecular bridges, J Chem. Phys. C 112 (2008) 13769. 

One of the most promising applications of fullerene molecules is nanoelectronics. Recently, several groups have reported the results of ab initio calculations of current-volt characteristics of the fullerene molecule [94,95]. These investigations were stimulated by scanning tunneling microscopy (STM) experiments in which the C o molecules were adsorbed on metallic surfaces [96, 97] as well as the break-junction experiments [98] and the demonstration of a prototype of a molecular transistor on the basis of carbon nanotube [99]. 

Semiconductors are used in a wide variety of electronic and optoelectronic apphcations. The useful properties of semiconductors arise from the unique behavior of doped materials, the special control of electron flow provided by p-n jxmctions, and the interaction of Ught energy with electrons at these junctions. The industry continues to grow, and research in this and related areas (i.e., organic semiconductors and molecular transistors) is occurring at academic institutions arotmd the world, see also Germanium Silicon. 

Self-aligned ballistic molecular transistors and electrically parallel nanotube arrays. Nano Lett., 4, 1319-1322. 

Liang, W., M.P. Shores, M. Bockrath, J.R. Long, and H. Park. 2002. Kondo resonance in a single-molecular transistor. Nature 417(6890) 725-729. 

T. Ondarfuhu, C. Joachim, and S. Gerdes, Co-planar carbon nanotube hybrid molecular transistors fabricated in parallel, Europhys. Lett, 52, 178 [2000]. 

Much attention has been paid in recent years to the development and fabrication of electronic sensors and devices from conjugated polymers. Molecular transistors. 

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