Molecule-based transistor

Henry S. White, Gregg P. Kittlesen, and Mark S. Wrighton. Chemical deriva-tization of an array of three gold microelectrodes with polypyrrole fabrication of a molecule-based transistor. Journal of the American Chemical Society, 106(18) 5375-5377, 1984. 

Tumer-Jones, E.T. Chyan, O.M. Wrighton, M.S. Preparation and characterization of molecule-based transistors with a 50-nm source-drain separation with use of shadow deposition techniques Toward faster, more sensitive molecule-based devices. J. Am. Chem. Soc. 1987, 109. 5526-5528. 

A Molecule-based Transistor Using Conducting Polymers... 

Wrighton and co-workers developed a "molecule-based transistor" which uses conducting polymers either chemically doped polyaniline layers deposited atop Au interdigitated electrodes [44] or on 50-100 nm "gate" polyaniline polymer between two Au electrodes shadowed with Si02 this device still has a rather slow switching rate (10 kHz) and a gain of almost 1,000 [45]. The related work of Stubb and co-workers is discussed elsewhere in this volume. 

E. P. Lofton, J. W. Thackeray, and M. S. Wrighton, Amplification of electrical signals with molecule-based transistors Power amplification up to a kilohertz frequency and factors limiting higher frequency operation, J. Phys., Chem. 90 6080 (1986). 

Recently, several molecule-based microelectrochemical devices have been developed by the Wrighton group.(14.15.21-22) A microelectrode array coated with poly(I) results in a microelectrochemical transistor with the unique characteristic that shows "turn on" in two gate potential, Vq, regimes, one associated with the polythiophene switching from an insulator to a conductor upon oxidation and one associated with the v2+ + conventional redox centers. 

Single molecule Cgo based transistors were also fabricated by depositing a diluted Cgo toluene solution onto a pair of gold electrodes. The whole structure was built on an insulating Si02 layer on top of a doped Si wafer that was used as the gate electrode to modulate the electrostatic potential of the Cgo molecule trapped in the middle of the junction (see Fig. 14). The observed 1-V characteristics were... 

A memory/adder model based on an electromechanical single molecule Cqo transistor... 

We can allocate the appellation single-molecule DNA-transistor to such a system. In contrast to all previously suggested DNA-based molecular electronics, this system operates in the natural aqueous environment for biological DNA-fimction. The perspective in the present context is, however, perhaps rather that experimentally sophisticated single-molecule electronics data add important support to the subtle electronic conductivity features of... 

This chapter concentrates on organic bipolar transistors, including details about the basic operation principles, device configurations, and processing methods, and describing the various strategies that have been applied to achieve ambipolar transport. Touching upon small molecule-based FETs and the hybrid approach, the main focus will be on polymer-based bipolar transistors since they can provide one of the ultimate solutions for simple, low-cost fabrication of flexible bipolar FETs. 

---