Field emission characteristics of diamond films with different surface morphologies

Ji, Hong; Jin, Zhi; Wang, J. Y.; Lu, X.; Gu, Chen; Liu, B. B.; Jin, W. C.; Gao, C. X.; Yuan, Guang; Wang, W. B.

doi:10.1116/1.590618

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…Considering thin CVD diamond films, the measured electron emission yield was found to be dependent on a surface treatment [1][2][3][4][5][6][7][8][9], thermal history [2,6], microstructure [10 -12], doping [2,13], crystalline orientation [1,12], presence of non-diamond carbon phases [14,15] and other factors. One of the important factors that may affect the electron emission properties of diamond film is its thickness.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of electron emission from near-coalescent nanometer thick continuous diamond films

Ternyak

Michaelson

Akhvlediani

et al. 2006

Diamond and Related Materials

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Section: Introductionmentioning

confidence: 99%

Enhancement of electron emission from near-coalescent nanometer thick continuous diamond films

Ternyak

Michaelson

Akhvlediani

et al. 2006

Diamond and Related Materials

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“…[10] Thus, diamondoids offer unique opportunities to study the relationship between the shape and properties of nanodiamond particles [26] and, in contrast to previous attempts with traditional bulk nanodiamond, allow the fine tuning of the electronic properties of diamond at the nanolevel. As the electron affinity [11,27] and field emission [28] properties of the {111}, {110}, and {100} surfaces of diamond are clearly different, that is, the surface structure influences the electronic properties of diamond substantially, [29] one can expect similar effects for diamondoids depending on their orientation on surfaces of metals or semiconductors. Such distinguishable orientations could be achieved by the introduction of functional groups into strategic positions of a diamondoid, which would allow the control of the electronic properties of the nanodiamonds.…”

Section: Introductionmentioning

confidence: 92%

Reactivities of the Prism‐Shaped Diamondoids [1(2)3]Tetramantane and [12312]Hexamantane (Cyclohexamantane)

Fokin

Tkachenko

Fokina

et al. 2009

Chemistry A European J

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Various functional groups have been incorporated into the structures of the naturally occurring diamondoids [1(2)3]tetramantane and [12312]hexamantane (cyclohexamantane), which represent hydrogen-terminated prism-shaped nanodiamonds. The selectivities of the C-H substitutions in [1(2)3]tetramantane depend on the reagent employed and give products substituted at either central (through bromination) or peripheral (through nitroxylation and photo-oxidation) positions. The hydrogen-coupled electron-transfer mechanism of C-H nitroxylation with the model electrophile NO(2)(+)...HNO(3) was verified computationally at the B3PW91 and MP2 levels of theory by utilizing the 6-31G(d) and cc-pVDZ basis sets. The thermodynamically controlled nitroxylation/isomerization of [1(2)3]tetramantane allows the preparation of peripherally trisubstituted derivatives, which were transformed into tripod-like nanodiamond building blocks. The bromination of cyclohexamantane selectively gives the 2-bromo derivative, reproducing the chemical behavior of the {111} surface of the hydrogen-terminated diamond.

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Effect of nitrogen on deposition and field emission properties of boron-doped micro- and nano-crystalline diamond films

Cheng

et al. 2010

Nano-Micro Lett.

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In this paper, we report the effect of nitrogen on the deposition and properties of boron doped diamond films synthesized by hot filament chemical vapor deposition. The diamond films consisting of micro-grains (nano-grains) were realized with low (high) boron source flow rate during the growth processes. The transition of micro-grains to nano-grains is speculated to be strongly (weekly) related with the boron (nitrogen) flow rate. The grain size and Raman spectral feature vary insignificantly as a function of the nitrogen introduction at a certain boron flow rate. The variation of electron field emission characteristics dependent on nitrogen is different between microcrystalline and nanocrystalline boron doped diamond samples, which are related to the combined phase composition, boron doping level and texture structure. There is an optimum nitrogen proportion to improve the field emission properties of the boron-doped films. [5][6][7] affected by doping have been extensively investigated. However, in previous work, the understanding on how the dopants (mainly refer to N and B) modify the growth and properties of diamond films was mostly emphasized on the sole doping by boron or nitrogen. Recently, there are a few reports on the diamond deposition with co-dopants [8,9]. Hartmann et al. [8] reported that in highly boron-doped micro-diamond, large (small) additions of nitrogen would stabilize the diamond structure (induce more graphite formation). The electronic structure of boron-doped nano-diamond films can be markedly modified by nitrogen and there was an optimized gas proportion to achieve improved field emission [9]. However, the corresponding underlying mechanism is still not very clear. Furthermore, growth features related to the co-doping of boron and nitrogen are desirable to be investigated in detail.In this letter, by hot filament CVD (HFCVD), the microcrystalline diamond (MCD) and nanocrystalline diamond (NCD) films with co-introducing boron and nitrogen were synthesized by adjusting the gas proportion of nitrogen and boron in the reaction ambient. The effect of nitrogen on the

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Field emission characteristics of diamond films with different surface morphologies

Cited by 11 publications

References 6 publications

Enhancement of electron emission from near-coalescent nanometer thick continuous diamond films

Enhancement of electron emission from near-coalescent nanometer thick continuous diamond films

Reactivities of the Prism‐Shaped Diamondoids [1(2)3]Tetramantane and [12312]Hexamantane (Cyclohexamantane)

Effect of nitrogen on deposition and field emission properties of boron-doped micro- and nano-crystalline diamond films

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