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- W4323355973 abstract "Detailed structural and electrical properties of ultra-nano-crystalline diamond (UNCD) films grown in H$_text{2}$/CH$_text{4}$/N$_text{2}$ plasma were systematically studied as a function of deposition temperature ($T_d$) and nitrogen content ($%$ N$_2$) to thoroughly evaluate their effects on conductivity. $T_d$ was scanned from 1000 to 1300 K for N$_2$ fixed at 0, 5, 10 and 20 $%$. It was found that even the films grown in the synthetic gas mixture with no nitrogen could be made as conductive as 1$-$10$^{-2}$ $Omega$ cm with overall resistivity of all the films tuned over 4 orders of magnitude through varying growth parameters. On a set of 27 samples, Raman spectroscopy and scanning electron microscopy show a progressive and highly reproducible film material phase transformation, from ultra-nano-crystalline diamond to nano-crystalline graphite as deposition temperature increases. The rate of this transformation is heavily dependent on N$_2$ content. Addition of nitrogen greatly increases the amount of $sp^2$ bonded carbon in the films thus enhancing the physical connectivity in the GB network that have high electronic density of states. However, addition of nitrogen greatly slows down crystallization of $sp^2$ phase in the GBs. Therefore, proper balance between GB connectivity and crystallinity is the key in conductivity engineering of (N)UNCD." @default.
- W4323355973 created "2023-03-08" @default.
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- W4323355973 date "2019-10-21" @default.
- W4323355973 modified "2023-09-24" @default.
- W4323355973 title "Revisiting Effects of Nitrogen Incorporation and Graphitization on Conductivity of Ultra-nano-crystalline Diamond Films" @default.
- W4323355973 doi "https://doi.org/10.48550/arxiv.1910.09595" @default.
- W4323355973 hasPublicationYear "2019" @default.
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