The influence of thermal annealing on the electronic defect states in nanocrystalline CVD diamond films

2008 ◽  
Vol 205 (9) ◽  
pp. 2158-2162 ◽  
Author(s):  
Z. Remes ◽  
A. Kromka ◽  
J. Potmesil ◽  
M. Vanecek
Keyword(s):  
Thermal Annealing ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Defect States ◽  
Electronic Defect

Evidence for the principal defect states in CVD diamond films: optical study

1996 ◽  
Vol 5 (9) ◽  
pp. 952-957 ◽  
Author(s):  
M. Vaněček ◽  
J. Rosa ◽  
M. Nesládek ◽  
L.M. Stals
Keyword(s):  
Diamond Films ◽  
Cvd Diamond ◽  
Optical Study ◽  
Defect States

Photocurrent and Photoelectron Yield Spectroscopies of Defect States in CVD Diamond Films

2000 ◽  
Vol 181 (1) ◽  
pp. 29-35 ◽  
Author(s):  
M.C. Rossi ◽  
S. Salvatori ◽  
F. Scotti ◽  
G. Conte ◽  
E. Cappelli
Keyword(s):  
Diamond Films ◽  
Cvd Diamond ◽  
Defect States

scholarly journals Role of Chemistry and Crystal Structure on the Electronic Defect States in Cs-Based Halide Perovskites

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1032
Author(s):  
Anirban Naskar ◽  
Rabi Khanal ◽  
Samrat Choudhury
Keyword(s):  
Crystal Structure ◽  
Density Functional ◽  
Covalent Bond ◽  
Density Functional Theory Calculations ◽  
Antisite Defect ◽  
Defect States ◽  
Functional Theory ◽  
Electronic Defect ◽  
Constituent Elements

The electronic structure of a series perovskites ABX3 (A = Cs; B = Ca, Sr, and Ba; X = F, Cl, Br, and I) in the presence and absence of antisite defect XB were systematically investigated based on density-functional-theory calculations. Both cubic and orthorhombic perovskites were considered. It was observed that for certain perovskite compositions and crystal structure, presence of antisite point defect leads to the formation of electronic defect state(s) within the band gap. We showed that both the type of electronic defect states and their individual energy level location within the bandgap can be predicted based on easily available intrinsic properties of the constituent elements, such as the bond-dissociation energy of the B–X and X–X bond, the X–X covalent bond length, and the atomic size of halide (X) as well as structural characteristic such as B–X–B bond angle. Overall, this work provides a science-based generic principle to design the electronic states within the band structure in Cs-based perovskites in presence of point defects such as antisite defect.

PTIS investigation of hydrogenated CVD diamond films

2005 ◽  
Vol 202 (11) ◽  
pp. 2171-2176 ◽  
Author(s):  
A. Hikavyy ◽  
P. Clauws ◽  
W. Deferme ◽  
G. Bogdan ◽  
K. Haenen ◽  
...  
Keyword(s):  
Diamond Films ◽  
Cvd Diamond

Enhanced Tribological Performance of CVD Diamond Films Enabled by Using Graphene Layers as Solid Lubricant

2016 ◽  
Vol 1136 ◽  
pp. 573-578 ◽  
Author(s):  
Su Lin Chen ◽  
Bin Shen ◽  
Fang Hong Sun
Keyword(s):  
Tungsten Carbide ◽  
Solid Lubricant ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Tribological Performance ◽  
Chemical Vapor Deposition Method ◽  
Dry Sliding ◽  
Graphene Layers ◽  
Sliding Interface ◽  
Graphene Flakes

The present study reports the influence of graphene layers on the tribological performance of CVD diamond films when they are used as the solid lubricants. Friction tests are conducted on a ball-on-plate friction tester, where the stainless steel is used as the counterpart material. The CVD diamond film sample is a typical microcrystalline diamond (MCD) coating which is deposited on a flat tungsten carbide substrate using the hot filament chemical vapor deposition method (HFCVD). Besides the MCD sample, a polished MCD film (pMCD) and a polished tungsten carbide (pWC) are also adopted in frictional tests, aiming at illustrating the influence of the surface morphology, as well as the physical property, of the sample on the lubricative effect of graphene layers. The experimental results show that graphene layers can effectively reduce the coefficient of friction (COF), regardless of the samples. The MCD sample presents the lowest stable COF, which is 0.13, in dry sliding period when the graphene flakes are sparyed on the sliding interface; while the pMCD and pWC samples exhibit slightly higher COFs, which are 0.16 and 0.18, respectively. Comparatively, the COFs of these three samples obtained in dry sliding process without graphene are 0.20, 0.25 and 0.64. In additon, the MCD sample exhibits a much longer stable dry slidng process which is more than 5000 cycles. Comparatively, the other two tribo-pairs only exhibit a stable low-COF dry sliding period for around 2000 cycles. The reduction of COF could be attributed to the graphene flakes adhered on the sliding interface. It forms a layer of solid lubricative film with extremely low shear strength and significantly decreases the interactions between two contacted surfaces. The rugged surface of the MCD film provides sufficient clogging locations for graphene flakes, which allows the generated lubricative film enduring a long sliding duration. It can be arrived from this study that the tribological properties of the MCD film could be enhanced by simply adoping graphene layers as a solid lubricant. Furthermore, an improved performance of a variety of MCD coated cutting tools or mechanical components could be expected when they are utilized with graphene layers.

Application of Ion Beam Enhanced Deposition to Metallization of CVD Diamond Films

1998 ◽  
Vol 169 (1) ◽  
pp. R5-R6 ◽  
Author(s):  
N. B. Wong ◽  
G. Q. Li ◽  
S. M. Zhu ◽  
S. C. Tjong ◽  
S. T. Lee
Keyword(s):  
Ion Beam ◽  
Diamond Films ◽  
Cvd Diamond

Interface formation and properties of α-NPD thermally deposited on CVD diamond films

2003 ◽  
Vol 216 (1-4) ◽  
pp. 106-112 ◽  
Author(s):  
Min-Seung Chun ◽  
Tokuyuki Teraji ◽  
Toshimichi Ito
Keyword(s):  
Diamond Films ◽  
Cvd Diamond ◽  
Interface Formation

scholarly journals Thick heavily boron doped CVD diamond films homoepitaxially grown on (111)-oriented substrates

2017 ◽  
Vol 79 ◽  
pp. 108-111 ◽  
Author(s):  
A. Boussadi ◽  
A. Tallaire ◽  
O. Brinza ◽  
M.A. Pinault-Thaury ◽  
J. Achard
Keyword(s):  
Diamond Films ◽  
Cvd Diamond ◽  
Boron Doped

Study of the Interface Microstructures of CVD Diamond Films by TEM

2000 ◽  
Vol 132 (2-4) ◽  
pp. 315-321 ◽  
Author(s):  
Alexander G. Fitzgerald ◽  
Yongchang Fan ◽  
Phillip John ◽  
Clare E. Troupe ◽  
John I. B. Wilson ◽  
...  
Keyword(s):  
Diamond Films ◽  
Cvd Diamond
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