Mark Ratners Concepts of Molecular Electronics

scratch Ratners Concepts of Molecular ElectronicsMark RatnerandThe Basis of the Future Molecular ElectronicsLevent Bahadrhan Karaku2. IntroductionMark Ratner, He is professor of chemical science and professor of materials science and engineering at Northwestern University. He studies the theory of fundamental chemical processes related to nanoscale application. Ratner is a atom of the Internatioanal Academy of Quantum Molecular cognition also, His lectures subjects were Transport in molecular Junctionsand Nano and Energy at Stanfort University at 2009. I choose Mark Ratner because, Topic of Nano technology and push generation ar important on the sustainable energy. High capaticy batteries, high technology solar cells, etc. besides new tech-power plants or storages These topics to be canvas for me. In short, Quantum mechanics and Nano technology atomic number 18 al slipway interested me20.2.1. EducationHe graduated from Harvard University department of chemistry at 1964. Then, He started Ph.D. in chemistry from Nortwestern University and working with G. Ludwig hofaker. Ratner first lecture chemistry at New York University from 1970 until 1974202.2. Career DevelopmentHe worked may extended period of time in israel and he worked with lots of scientists, including form Tel Aviv University and University of Jesursalem. Also Rater works international association, particularly in Netherlands and Denmark203. Fields3.1 Molecular Electronics (Primary field)Molecular electronics increased interest in as of late, induce spawning by information technology may reach it computability limits in a several years. 1-2. In order to molecular electronics to become a valued selection to silicon researces, It will not be enough to generated molecular electronic twists with distinguished characteristics, that proper circuit and architectural solution will be needed. When lots of effort has given to the demonstration of electronic operationalities of superstar molecules an d organic filmsi explore at the circuit and system level is still in its beginning5-9. investigation on single molecules or nanotube based devices prospect to keep Moores law alive once miniaturisation of silicon-based structures becomes useless. As first proposed by Aviram and Ratner 10. One can imagine to squeeze whole nonlinear circuit elements much(prenominal) as transistors or diodes into single molecules. In principle, suchlike devices could be importantly faster and smaller than end of the routemap solid state electron devices11.3.1.1 Why molecular electronics?Intrinsically entire electronic processes in nature, from photosynthesis to signal transduction, occur in molecular structures. For electronic epplications, molecular structure have four major advantagesSize The size scale of molecules is between 1 and 100nm, a scale that permits functional nano-structures with attendant advantages in efficiency, cost and power dissipation.Assembly and recognition One can exploit sec ific internolcular interaction to from structures with nano-scale self assembly. Molecular recognition can be used to chance electronic attitutde, providing some(prenominal) swithing and sensing capabilities on the one molecule scale.Dynamical stereochemistry lots of molecules gave multiple distinct stable conformations or isomers. such(prenominal) geometric isomers can gave distinct optical and electronic properties. For instance, the retinal one switches between more than one stable structures, a process that transduces light into a chemoelectrical pulse and allows vision.Synthetic tailorability with choice of character and geometry, ona can extensively vary a impart of the molecule, binding, structural and optical properties. The instrument of molecular synthesis are extremely developed.12http//www.nanowerk.com/nanotechnology/reports/reportpdf/report52.pdf3.1.2 ElectrodeThe molecule electrode interface is a severely significant component of a molecular junction. It might limit current flow or tout ensemble modify the measured electrical response of the junction. Lots of experimental platforms for constructiong molecular electronic devices are founded on practical comsideration. This approach is in numerous ways the boon and the disaster of the field. For instance, the sulfur gold bond is a fabulous chemical hangle for forming self assembled, forceful organic monolayers on metal surfaces.Other technics such as using a scanning probe tip a cntact the molecule are frequently employed in part. Becuse that avoid bear on steps that can damage or unexpecteably modify the molecular component. Optimally the couice of electrode materials would be based not on the easy of production or measurement, but rather on first principles considerations of molecule electrode interactions. On the other hand, in state of the art for the theory of molecule electrode interfaces is very elemantary.http//www.nanowerk.com/nanotechnology/reports/reportpdf/report52.pdf3.1.3 DNAConsi der a protein that spans a cell membrane and shuttles information across that membrane. The protein self assembles and self orients in the membrane it also might switch between two forms, but one of that will transmit the chemicalsignal. Proteins are big molecues and indeed a specific molecular size is required to achieve such a wealthy combination of properties. The rotaxane molecule shown large and comples, but it is indeed efficiently and small designed, given the set of mechanical, chemical, and electronic properties that have been built into it16.Quite likely, transport in DNA junctions will show that the molecule or at least naturally occuring DNA is actually a wide bandgap semiconductor characterized by localise hole hopping between the low energy guanine cytosine pairs. Also guanin yields the most stable positive ion. Because the band gap is wide, DNA seems colourless and ample range coherent charge motion is improbable17.3.1.4 Circuit ArchitectureThe potential of chemic al synthesis to design specific and maybe even useful device behaviors is rapidly being realised. The following question, what sorts of circuit architectures can most take advantage of molecular electronics, is nowadays receiving rather a bit of attention both from computer scientists and from researchers progress towerd indentifying and constructing working molecular electronics circutry has advanced fastly13.3.1.5 The FutureThe primary challenges of realizing a true molecular electronics technology are wintry. Controlled fabriaction to within specified tolerances and its expermental substantiation is a exclusive problem. Self assembly schemes based on molecular recognition will be viral for that work. Absolutely reproducible measurments of junction conductance are only beginning in laboratories at Cornell, Harvard, Delft, Purdue and karlsruhe Universities and at the Naval research laboratory and same centers.A lot of the technology targets of molecular electronics, such as the co mputational applications duscussed, should perhaps be viewed as drivers for focussing the field forward and for defining the critical and rate limiting challenges that must be overcome14.3.2 Electron transport in molecular wire junctionsMolecular conductance junction are structures in that unimolecules or minor groups of molecules conduct electrical current between one than one electrodes In such junctions, the linkage between the molecule and the electrodes very affects the current boltage characteristics. Considering theoretical and several experimental advances, including the understanding of basic systems, there is still express correspondence between theoretical and experimental studies of these systems18.3.3 Mesoscopic features of charge Generation in organic semiconductorsOver the past twenty years, organic materials gave been extremly investigated by countless research groups for implementation in organic photo voltaic(OPV) devices. The organic semi conductors is protrusiv e by their potential low cost and facile tunability, making organic photovoltaic devices a knowledfe gap in our common understanding of materials, so boyh the time scale and lenght scale (fento to microsecond and nano to micrometer) proper to OPV functionality occupy a challenging a impressive space between the traditional regimes of quantum mechanics and solid state physics19.4. ConclusionRatner lead up lots of field, research centre and laboratories foremost internationalist Business Machines (IBM) and The defense Advanced Research Projects Agency (DARPA). Also, He described his experiences as an organizing member a member of the board of directors and being on steering and selectrion committee. The significance of gaving a staff at research centre and proposal some thoughts on the future nanotechnology. Once for all, Ratner have a part in many todays technologyReferences1 J. R. Heath and M. A. Ratner, Physics Today 56, 43 (2003)2 J. R. Reimers, C. A. Picconnatto, J. C. Ellenboge n, and R. Shashidhar (eds.), Ann. New York Acad. Sci. 1006 (2003)5 J. R. Heath, P. J. Kuekes, G. S. Snider and R. S. Williams, Science 280, 1716 (1998)6 Y. Wada, Proc. IEEE 89, 8 (2001)7 J. M. Tour, W. L. Zandt, C. P. Husband, S. M. Husband, L. S. Wilson, P. D. Franzon and D. P. Nackashi, IEEE Trans. Nanotech, 1, 2 (2002)8 M. Macucci, G. Iannacone, L. Bonci and M. Girlanda, IEE Proc. Circuits Devices Syst. 151, 5 (2004) 9 A. Chaudhary, D. Z. Chen, X. S. Hu, M. T. Niemeier, R. Ravichandran and K. Whitton, IEEE Trans Comp. Aided Des. Int. Cir. Sys. 26, 11 (2007)10 A. Aviram and M. A. Ratner, Chem. Phys. Lett., 29, 277 (1974)11 J. C. Ellenbogen and J. C. Love, Proceedings IEEE 88 (3), 386 (2000)12 Thomas Bjrnholm ReferencesTue Hassenkam, Kasper Moth-oulsen, Nicolai Stuhr-Hansen, Kasper Nrgaard, M. S. Kabir, and Thomas Bjrnholm. Self-Assembly and Conductive Properties of Molecularly Linked Gold Nanowires. Nano Letters, 4 (1), 19 -22, 2004.13. A. J. Heinrich et al., Science 298, 1381 (20 02).13 A. Bachtold, P. Hadley, T. Nakanishi, C. Dekker, Science 294, 1317 (2001) Y. Huang, Science 294, 1313 (2001) P. Avouris et al., Physica B 323, 6 (2002) Y. Chen et al., Nanotechnology 14, 462 (2003).14 A. DeHon, in Proc. First Workshop on Non-Silicon Computation, available at http//www.cs.caltech.edu/research/ic/ pdf/molecular_nsc2002.pdf15 P. J. Kuekes, R. S. Williams, Demultiplexer for a Molecular Wire Crossbar Network, US Patent 6,256,767 (3 July 2001)16 A. J. Heinrich et al., Science 298, 1381 (2002).17 D. Porath, A. Bezryadin, S. de Vries, C. Dekker, Nature 403, 635 (2000).18 Nitzan, A, Ratner, M 2003, Electron Transport in Molecular Wire Junctions, Science, 5624, p. 1384, JSTOR Journals, EBSCOhost, viewed 7 May 2015.19 Savoie, B, Jackson, N, Chen, L, Marks, T, Ratner, M 2014, Mesoscopic features of charge generation in organic semiconductors, Accounts Of chemical Research, 47, 11, p. 3385-3394, Scopus, EBSCOhost, viewed 7 May 2015.20 Cao, M, Deng, L, Xu, H 2015, Stud y of PNA-DNA hybridization by AFM-based single-molecule force spectroscopy, Colloids And Surfaces A Physicochemical And Engineering Aspects, 470, p. 46-51, Scopus, EBSCOhost, viewed 7 May 2015.