Enhancement in electron field emission in ultrananocrystalline and microcrystalline diamond films upon 100 MeV silver ion irradiation

doi:10.1063/1.3106638

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Title:	Enhancement in electron field emission in ultrananocrystalline and microcrystalline diamond films upon 100 MeV silver ion irradiation
Authors:	Chen, Huang-Chin;Palnitkar, Umesh;Pong, Way-Faung;Lin, I-Nan;Singh, Abhinav Pratap;Kumar, Ravi
Contributors:	淡江大學物理學系
Date:	2009-04
Issue Date:	2011-10-24 10:45:17 (UTC+8)
Publisher:	College Park: American Institute of Physics
Abstract:	Enhanced electron field emission (EFE) behavior was observed in ultrananocrystalline diamond (UNCD) and microcrystalline diamond (MCD) films upon irradiation with 100 MeV Ag9+-ions in a fluence of 5×1011 ions/cm2. Transmission electron microscopy indicated that while the overall crystallinity of these films remained essentially unaffected, the local microstructure of the materials was tremendously altered due to heavy ion irradiation, which implied that the melting and recrystallization process have occurred along the trajectory of the heavy ions. Such a process induced the formation of interconnected nanocluster networks, facilitating the electron conduction and enhancing the EFE properties for the materials. The enhancement in the EFE is more prominent for MCD films than that for UNCD films, reaching a low turn-on field of E0 = 3.2 V/μm and large EFE current density of Je = 3.04 mA/cm2 for 5×1011 ions/cm2 heavy ion irradiated samples.
Relation:	Journal of Applied Physics 105(8), 083707(7pages)
DOI:	10.1063/1.3106638
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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