Increased nitrogen-vacancy centre creation yield in diamond through electron beam irradiation at high temperature

Carbon ◽  
2019 ◽  
Vol 143 ◽  
pp. 714-719 ◽  
Author(s):  
M. Capelli ◽  
A.H. Heffernan ◽  
T. Ohshima ◽  
H. Abe ◽  
J. Jeske ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Electron Beam Irradiation ◽  
Nitrogen Vacancy ◽  
Beam Irradiation

scholarly journals Ensemble Negatively-Charged Nitrogen-Vacancy Centers in Type-Ib Diamond Created by High Fluence Electron Beam Irradiation

2021 ◽  
Vol 6 (1) ◽  
pp. 2
Author(s):  
Shuya Ishii ◽  
Seiichi Saiki ◽  
Shinobu Onoda ◽  
Yuta Masuyama ◽  
Hiroshi Abe ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Good Method ◽  
Nitrogen Vacancy ◽  
Beam Irradiation ◽  
High Concentration ◽  
Highly Sensitive ◽  
Nitrogen Vacancy Centers ◽  
The Creation ◽  
Nv Centers

Electron beam irradiation into type-Ib diamond is known as a good method for the creation of high concentration negatively-charged nitrogen-vacancy (NV−) centers by which highly sensitive quantum sensors can be fabricated. In order to understand the creation mechanism of NV− centers, we study the behavior of substitutional isolated nitrogen (P1 centers) and NV− centers in type-Ib diamond, with an initial P1 concentration of 40–80 ppm by electron beam irradiation up to 8.0 × 1018 electrons/cm2. P1 concentration and NV− concentration were measured using electron spin resonance and photoluminescence measurements. P1 center count decreases with increasing irradiation fluence up to 8.0 × 1018 electrons/cm2. The rate of decrease in P1 is slightly lower at irradiation fluence above 4.0 × 1018 electrons/cm2 especially for samples of low initial P1 concentration. Comparing concentration of P1 centers with that of NV− centers, it suggests that a part of P1 centers plays a role in the formation of other defects. The usefulness of electron beam irradiation to type-Ib diamonds was confirmed by the resultant conversion efficiency from P1 to NV− center around 12–19%.

Hot Set Characterization of Electron Beam Irradiated-Copper (II) Oxide Added LDPE Composites under Acidic Aging

2015 ◽  
Vol 786 ◽  
pp. 63-67
Author(s):  
Tiam Ting Tee ◽  
Soo Tueen Bee ◽  
Tin Sin Lee ◽  
Chantara Thevy Ratnam ◽  
Haraveen Kaur Jogindar Singh
Keyword(s):  
Electron Beam ◽  
Free Radicals ◽  
High Temperature ◽  
Electron Beam Irradiation ◽  
Static Load ◽  
Beam Irradiation ◽  
Duration Time ◽  
The Matrix ◽  
Oxide Particles ◽  
Ldpe Composites

In this research study, the effect of aging duration time and electron beam irradiation dosages on the hot set results of copper (II) oxide added LDPE composites have been investigated. The addition of copper (II) oxide particles in LDPE matrix has significantly reduced the formation of crosslinking networks in LDPE matrix by blocking the mobility of free radicals generated by electron beam irradiation. At lower irradiation dosages (< 100 kGy), all the copper (II) oxide added LDPE composites were immediately failed the hot set test when subjected to static load of 20 N/cm2 under high temperature. Besides, the occurrence of copper (II) oxide particles in LDPE matrix also reduced the matrix continuities of copper (II) oxide added LDPE composites and caused the matrix resistance ability of LDPE matrix to be decreased. The increasing of irradiation dosages has significantly delayed the failing time of all LDPE composites when under static load at high temperature. This is because the increasing of electron beam irradiation could further induce the generation of free radicals to form higher degree of crosslinking networks in LDPE matrix. At higher irradiation dosage up to 250 kGy, the pristine LDPE was observed able to withstand the applied static load under high temperature more than 15 minutes. This is due to higher degree of crosslinking networks formed in LDPE matrix could effectively restrict the mobility of LDPE chains under static load and thus delay the failing of sampels. When the aging duration time increased from 4 days to 14 days, the resistance ability of all LDPE has been significantly weakened due to the occurrence of chain scissioning process in LDPE matrix by delaying the failing time of samples.

scholarly journals Edge Modification of Graphene Using Concurrent High Temperature Heating and Electron Beam Irradiation

2011 ◽  
Vol 17 (S2) ◽  
pp. 1502-1503
Author(s):  
H Floresca ◽  
S Mick ◽  
N Lu ◽  
J Wang ◽  
M Kim
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Edge Modification ◽  
Temperature Heating ◽  
High Temperature Heating

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

Defined functionality and increased luminescence of nanodiamonds for sensing and diagnostic applications by targeted high temperature reactions and electron beam irradiation

2017 ◽  
Vol 1 (12) ◽  
pp. 2527-2540 ◽  
Author(s):  
Ch. Laube ◽  
Y. M. Riyad ◽  
A. Lotnyk ◽  
F. P. Lohmann ◽  
C. Kranert ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
High Temperature Reactions ◽  
Diagnostic Applications

Highly reproducible functionalized and bright nanodiamonds for sensing and diagnostic applications by high temperature reactions and electron beam irradiation.

Electric Production of High-quality Fuels via Electron Beam Irradiation at Ambient Conditions

2021 ◽  
Author(s):  
Kunpeng Wang ◽  
David Staack
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Thermal Activation ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Ambient Conditions ◽  
High Quality ◽  
Traditional Methods ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

Production of high-quality fuels and petrochemicals are both energy and emission intensive with traditional methods. Thermal activation of reactions by catalysts or high temperature and pressure or both are very...

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