Abstract
Uniform thin films of carbon in the thickness range 100 to 2300 A have been prepared by arc-evaporation in vacuum. Evaporation rates were about 50 A/sec. The electrical properties of these films suggest that unannealed arc-evaporated carbon had less long-range order and was, therefore, more truly amorphous in structure than any other form of carbon yet obtained. After the films had been heated to 1200°K, however, their properties were similar to ordinary fine-particle carbon blacks, apparently as a result of increased ordering. The electrical resistivity of unannealed films followed Ohm's law, was not photosensitive, and could be well represented in the temperature range 77°K to 300°K by the equation R=AT−b, where b=5. When the carbon films were heated above room temperature, the resistivity and the exponent b were both decreased substantially. After the films had been annealed at 1200°K, the resistivity was reduced by a factor exceeding 800, and could be best represented, in the temperature range 77°K to 1200°K, by the equation R=α—βT. The values of the resistivity, temperature coefficient of resistivity, and thermoelectric power of the annealed films were then more nearly in agreement with the corresponding values for ordinary fine-particle carbon blacks. Other properties and applications of the films are discussed.
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Dates
Type | When |
---|---|
Created | 20 years, 4 months ago (April 22, 2005, 12:10 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 1, 2024, 5:17 p.m.) |
Indexed | 11 months, 2 weeks ago (Sept. 3, 2024, 1:16 a.m.) |
Issued | 68 years, 3 months ago (May 1, 1957) |
Published | 68 years, 3 months ago (May 1, 1957) |
Published Print | 68 years, 3 months ago (May 1, 1957) |
@article{Blue_1957, title={Electrical Properties of Arc-Evaporated Carbon Films}, volume={28}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1722807}, DOI={10.1063/1.1722807}, number={5}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Blue, M. D. and Danielson, G. C.}, year={1957}, month=may, pages={583–586} }