Information Processing Schemes Based on Monolayer Protected Metallic Nanoclusters

  • Cervera J
  • Mafé S
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Abstract

Nanostructures are potentially useful as building blocks to complement future electronics because of their high versatility and packing densities. The fabrication and characterization of particular nanostructures and the use of new theoretical tools to describe their properties are receiving much attention. However, the integration of these individual systems into general schemes that could perform simple tasks is also necessary because modern electronics operation relies on the con- certed action of many basic units. We review here new conceptual schemes that can allow infor- mation processing with ligand or monolayer protected metallic nanoclusters (MPCs) on the basis of the experimentally demonstrated and theoretically described electrical characteristics of these nanostructures. In particular, we make use of the tunnelling current through a metallic nanocluster attached to the electrodes by ligands. The nanostructure is described as a single electron tran- sistor (SET) that can be gated by an external potential. This fact permits exploiting information processing schemes in approximately defined arrays of MPCs. These schemes include: (i) binary, multivalued, and reversible logic gates; (ii) an associative memory and a synchronization circuit; and (iii) two signal processing nanodevices based on parallel arrays of MPCs and nanoswitches. In each Dcaesleiv,etrhedpbraycPticuabl loispheirnagtioTneocfhnthoelongaynotod:evOicseakisabDasaeigdaoknu t(hOesSaEkaT Uprnoipverrtsieitsy)of MPCs IP: 133.1.148.150 On: Fri, 25 Jan 2013 01:21:20 reported experimentally. We examine also some of the practical problems that should be addressed Copyright American Scientific Publishers in future experimental realizations: the stochastic nature of the electron tunnelling, the relatively low operation temperatures, and the limited reliability caused by the weak signals involved and the nanostructure variability. The perspectives to solve these problems are based on the potentially high degree of scalability of the nanostructures.

Author-supplied keywords

  • logic gates
  • monolayer protected metallic nanoclusters
  • signal processing
  • single electron transistor
  • stochastic resonance

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Authors

  • Javier Cervera

  • Salvador Mafé

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