Ballistic Electron Microscopy of Individual Molecules

Abstract

We analyzed the transport of ballistic electrons through organic molecules on uniformly flat surfaces of bismuth grown on silicon. For the fullerene C60 and for a planar organic molecule (3,4,9,10-perylene-tetracarboxylic acid dianhydride), the signals revealed characteristic submolecular patterns that indicated where ballistic transport was enhanced or attenuated. The transport was associated to specific electronic molecular states. At electron energies of a few electron volts, this "scanning near-field electron transmission microscopy" method could be applied to various adsorbates or thin layers.

Electrical rectification by selective wave-function coupling in small Ag clusters onSi(111)−(7×7)

“…Extensive research has been carried out in this direction for various molecules and clusters. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Among different functionalities, electric rectification is a basic function that nanodevices must perform. 1 In modern microelectronics, this is achieved with semiconductor p-n junction or Schottky junction.…”

A single molecule rectifier with strong push-pull coupling

“…We have used the HF/6-31G and HF/ 6-31G ‫ء‬ and the results obtained are in agreement so we adopted the HF/6-31G, which has been successfully applied for determining electronic structure in these types of systems. 21 Figure 1͑b͒ shows schematically the nonequilibrium system used to generate an I-V curve that resembles the equilibrium Q-V curve. [14][15][16][17] The effects of an external electric field and its interplay with charging accumulation in the donor/acceptor group are considered in part ͑i͒.…”

Single molecular shuttle-junction: Shot noise and decoherence

“…Experimentally, nanometer-scale electromechanical devices are fabricated by organizing molecular building blocks [66][67][68][69][70][71][72][73][74][75][76][77][78][79][80] and by optical or electron beam lithography methods [81][82][83]. Here, we briefly present two typical experiments on nanoscale electromechanical systems.…”