Abstract
Nanometer scale diamond tip emitters for cold cathodes are being developed as (a) vertical and (b) lateral diamond vacuum field emission devices. These diamond field emission devices, diode and triode, were fabricated with a self-aligning gate formation technique from silicon-on-insulator wafers using variations of silicon micropatterning techniques. High emission current, > 0.1A was achieved from the vertical diamond field emission diode with an indented anode design. The gated diamond triode in vertical configuration displayed excellent transistor characteristics with high DC gain of ∼ 800 and large AC output voltage of ∼ 100 V p-p. Lateral diamond field emission diodes with cathode-anode spacing less than 2 μm were fabricated. The lateral diamond emitter exhibited a low turn-on voltage of ∼ 5 V and a high emission current of 6 μA. The low turn-on voltage (field ∼ 3 V/μm) and high emission characteristics are the best of reported lateral field emitter structures. We are also examining particulate nanodiamond for thermal conductivity enhancement of dielectric oils. We have observed that a dispersion of nanodiamond (particle size circa < 5 nm) can increase the overall thermal conductivity of cooling oils such as used in power transformers by over 25%.
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References
J. van der Weide, Z. Zhang, P.K. Baumann, M.G. Wemnsell, J. Bernholc, and R.J. Nemanich. Negative-electron-affinity effects on the diamond (100) surface. Phys. Rev. B 50, 5803–06 (1994).
I.L. Krainsky, V.M. Asnin, G.T. Mearini, and J.A. Dayton. Negative-electron-affinity effect on the surface of chemical-vapor-deposited diamond polycrystalline films. Phys. Rev. B 53, 7650–53 (1996).
I.L. Krainsky and V.M. Asnin. Negative electron affinity mechanism for diamond surfaces. Appl. Phys. Lett. 72, 2574–76 (1998).
M.W. Geis, J.C. Twichell, J. Macaulay, and K. Okano. Electron field emission from diamond and other carbon materials after H2, O2, and Cs treatment. Appl. Phys. Lett. 67, 1328–30 (1995)
M.W. Geis, J. Gregory, and B.B. Pate. Capacitance-voltage measurements on metal-SiO2-diamond structures fabricated with (100)-oriented and (111)-oriented substrates. IEEE Trans. Electron Devices 38, 619 (1991).
W.P. Kang, et al., “Mold Method for Forming Vacuum Field Emitters and Method for Forming Diamond Emitters”, U.S. Patent 6,132,278, October 17, 2000.
C.S. Lee, J.D. Lee, and C.H. Han. A new lateral field emission device using chemical-mechanical polishing. IEEE Electron Devices Lett. 21, 479 (2000).
M. Yun, A. Turner, R.J. Roedel, and M.N. Kozicki. Novel lateral field emission device fabricated on silicon-on-insulator material. J. Vac. Sci. Technol. B 17, 1561 (1999).
S.S. Park, D.I. Park, S.H. Hahm, J.H. Lee, H.C. Choi, and J.H. Lee. Fabrication of a lateral field emission triode with a high current density and high transconductance using the local oxidation of the polysilicon layer. IEEE Trans. Electron Devices 46, 1283 (1999).
X.W. Wang, et al. Thermal Conductivity of Nanoparticle-Fluid Mixtures. Journal of Thermophysics and Heat Transfer 13(4), 474–80 (1999).
J.A. Eastman et al. Anomalously Increased Effective Thermal Conductivities of Ethylene Glycol-based Nanofluids Containing Copper Nanoparticles. Applied Physics Letter 78(6), 718–20 (2001).
Yun Wang et al. Thermal conductivity of Nanoparticle Suspensions, Proceedings of the 8th AIAA (American Institute of Aeronautics and Astronautics)/ASME Joint Thermophysics and Heat Transfer Conference, St. Louis, Missouri, 24–26 June 2002, AIAA 2002-3345, p.1–6.
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Davidson, J., Kang, W. (2005). Applying CVD Diamond and Particulate Nanodiamond. In: Gruen, D.M., Shenderova, O.A., Vul’, A.Y. (eds) Synthesis, Properties and Applications of Ultrananocrystalline Diamond. NATO Science Series, vol 192. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3322-2_30
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DOI: https://doi.org/10.1007/1-4020-3322-2_30
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-3320-9
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