Abstract
The design, realization, and test performances of an electronic junction based on single-electron phenomena that works in the air at room temperature are hereby reported. The element consists of an electrochemically etched sharp tungsten stylus over whose tip a nanometer-size crystal was synthesized. Langmuir-Blodgett films of cadmium arachidate were transferred onto the stylus and exposed to a H2S atmosphere to yield CdS nanocrystals (30-50 angstrom in diameter) imbedded into an organic matrix. The stylus, biased with respect to a flat electrode, was brought to the tunnel distance from the film and a constant gap value was maintained by a piezo-electric actuator driven by a feedback circuit fed by the tunneling current. With this set-up, it is possible to measure the behavior of the current flowing through the quantum dot when a bias voltage is applied. Voltage-current characteristics measured in the system displayed single-electron trends such as a Coulomb blockade and Coulomb staircase and revealed capacitance values as small as 10(-19) F.
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Selected References
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- Dorogi M, Gomez J, Osifchin R, Andres RP, Reifenberger R. Room-temperature Coulomb blockade from a self-assembled molecular nanostructure. Phys Rev B Condens Matter. 1995 Sep 15;52(12):9071–9077. doi: 10.1103/physrevb.52.9071. [DOI] [PubMed] [Google Scholar]
- Fulton TA, Dolan GJ. Observation of single-electron charging effects in small tunnel junctions. Phys Rev Lett. 1987 Jul 6;59(1):109–112. doi: 10.1103/PhysRevLett.59.109. [DOI] [PubMed] [Google Scholar]
- Li X., Guo X., Bu G. A case of aneurysmal bone cyst of maxillary sinus. Chin Med J (Engl) 1995 Dec;108(12):938–940. [PubMed] [Google Scholar]
- Wilkins R, Ben-Jacob E, Jaklevic RC. Scanning-tunneling-microscope observations of Coulomb blockade and oxide polarization in small metal droplets. Phys Rev Lett. 1989 Aug 14;63(7):801–804. doi: 10.1103/PhysRevLett.63.801. [DOI] [PubMed] [Google Scholar]
- van Bentum PJ, Smokers RT, van Kempen H Incremental charging of single small particles. Phys Rev Lett. 1988 Jun 13;60(24):2543–2546. doi: 10.1103/PhysRevLett.60.2543. [DOI] [PubMed] [Google Scholar]
- van Bentum PJ, van Kempen H, van de Leemput LE, Teunissen PA. Single-electron tunneling observed with point-contact tunnel junctions. Phys Rev Lett. 1988 Jan 25;60(4):369–372. doi: 10.1103/PhysRevLett.60.369. [DOI] [PubMed] [Google Scholar]