Chemical Patterning of Graphene via Metal-Assisted Highly Energetic Electron Irradiation for Graphene Homojunction-Based Gas Sensors

2020 ◽  
Vol 12 (42) ◽  
pp. 47802-47810 ◽  
Author(s):  
Garam Bae ◽  
Da Som Song ◽  
Yi Rang Lim ◽  
In Su Jeon ◽  
Moonjeong Jang ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Gas Sensors ◽  
Energetic Electron ◽  
Chemical Patterning

scholarly journals Direct observation of oxygen-vacancy formation and structural changes in Bi2WO6 nanoflakes induced by electron irradiation

2019 ◽  
Vol 10 ◽  
pp. 1434-1442 ◽  
Author(s):  
Hong-long Shi ◽  
Bin Zou ◽  
Zi-an Li ◽  
Min-ting Luo ◽  
Wen-zhong Wang
Keyword(s):  
Electron Irradiation ◽  
Oxygen Vacancies ◽  
Structural Changes ◽  
Cluster Formation ◽  
Energetic Electron ◽  
Structural Evolution ◽  
Formation Mechanisms ◽  
Tungsten Oxides ◽  
Transmission Electron ◽  
Oxygen Vacancy Formation

The prominent role of oxygen vacancies in the photocatalytic performance of bismuth tungsten oxides is well recognized, while the underlying formation mechanisms remain poorly understood. Here, we use the transmission electron microscopy to investigate the formation of oxygen vacancies and the structural evolution of Bi2WO6 under in situ electron irradiation. Our experimental results reveal that under 200 keV electron irradiation, the breaking of relatively weak Bi–O bonds leads to the formation of oxygen vacancies in Bi2WO6. With prolonged electron irradiation, the reduced Bi cations tend to form Bi clusters on the nanoflake surfaces, and the oxygen atoms are released from the nanoflakes, while the W–O networks reconstruct to form WO3. A possible mechanism that accounts for the observed processes of Bi cluster formation and oxygen release under energetic electron irradiation is also discussed.

scholarly journals De-protonation of Nickel Hydroxide by 200 kV Electron Irradiation

2021 ◽  
Vol 29 (6) ◽  
pp. 26-29
Author(s):  
Graham J.C. Carpenter ◽  
Zbigniew S. Wronski
Keyword(s):  
Electron Irradiation ◽  
Nickel Hydroxide ◽  
Energetic Electron ◽  
Intermediate Stage ◽  
Rechargeable Batteries ◽  
Mechanical Grinding ◽  
Positive Electrodes ◽  
Transmission Electron ◽  
Two Stages ◽  
Electron Energy Loss

Abstract:Previous studies of nickel hydroxide (Ni(OH)2) powders have shown that either heating or mechanical grinding can result in complete de-hydroxylation, leading to conversion to nickel oxide (NiO). In both cases, this process appears to occur in one stage, without evidence for any intermediate compounds being formed. During studies of Ni(OH)2 powders for applications in the positive electrodes of Ni metal hydride (NiMH) rechargeable batteries, using transmission electron microscopy (TEM), we have observed significant changes caused by exposure to the highly energetic electron beam used for imaging and analysis. It is shown here, using electron energy-loss spectroscopy (EELS), that de-hydroxylation under electron irradiation occurs in two stages, with nickel oxy-hydroxide (NiOOH) being formed at the intermediate stage.

Cathodoluminescence Investigation of Electron Irradiation Damage in Insulators.

1997 ◽  
Vol 3 (S2) ◽  
pp. 749-750
Author(s):  
M.A. Stevens Kalceff ◽  
M.R. Phillips ◽  
A.R. Moon
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Electron Irradiation ◽  
Defect Structure ◽  
Energetic Electron ◽  
Depth Resolution ◽  
Irradiation Damage ◽  
Resonance Spectroscopy ◽  
Structure Information ◽  
Complementary Techniques

Cathodoluminescence (CL) is the luminescent emission from a material which has been irradiated with electrons. Cathodoluminescence microanalysis (spectroscopy and microscopy) in an electron microscope complements the average defect structure information available from complementary techniques (e.g. Photoluminescence, Electron Spin Resonance spectroscopy). CL microanalysis enables both pre-existing and irradiation induced local variations in the bulk and surface defect structure to be characterized with high spatial (lateral and depth) resolution and sensitivity. This is possible as electron beam parameters such as the beam energy, may be varied to finely control the penetration depth of the incident electrons and hence the local volume of specimen probed.Irradiation with charged and neutral energetic radiation produces defects in radiation sensitive materials. The energetic electron beam in an electron microscope may also induce defects in the specimen. Cazaux has characterized the electric field produced by electron irradiation of a insulator with a conductive surface coating

Metastable reversal of the martensitic phase in Nb3Sn induced by energetic-electron irradiation

1997 ◽  
Vol 244 (3) ◽  
pp. 273-277 ◽  
Author(s):  
C.L. Snead ◽  
R.C. Birtcher ◽  
M.A. Kirk
Keyword(s):  
Electron Irradiation ◽  
Energetic Electron ◽  
Martensitic Phase

Dislocation Generated by Electron Irradiation

2011 ◽  
Vol 418-420 ◽  
pp. 744-747
Author(s):  
Suryanto
Keyword(s):  
Aluminum Alloy ◽  
Burger Vector ◽  
Dislocation Loop ◽  
Electron Irradiation ◽  
Energetic Electron ◽  
Nickel Aluminum ◽  
Dislocation Loops ◽  
Diffraction Vector ◽  
Perfect Dislocation

Dislocation loop was generated by electron irradiation in nickel aluminum alloy. It is important to know dislocation characteristics obtained from a high energetic electron irradiation. If b is the Burger vector of a dislocation loop and g is the diffraction vector, dislocation loop will appear larger, smaller or disappear for g.b>0, g.b<0 or g.b=0, respectively. Dislocation loop was determined as follows – first, the appearance of dislocation loops is arranged in observation table. Second, based on type of dislocation loop, Burger vector and diffraction vector, appearance of dislocation loop is arranged in calculation table. Third, based on observation and calculation table, Burger vector and type of dislocation loop is determined. The results show that dislocation loops consist of perfect dislocation loops and Frank dislocation loops. The perfect dislocation loops have Burger vectors of ½[0 ] and ½[ 0] while Frank dislocation loops have Burger vectors of ⅓[1 1], ⅓[11 ], ⅓[ 11], ⅓[111], ⅓[1 1], ⅓[11 ] and ⅓[ 11]. All dislocation loops are interstitial types.

Self-organized transformation to polyaniline nanowires by pulsed energetic electron irradiation in a plasma focus device

2009 ◽  
Vol 373 (22) ◽  
pp. 1962-1966 ◽  
Author(s):  
S.R. Mohanty ◽  
N.K. Neog ◽  
R.S. Rawat ◽  
P. Lee ◽  
B.B. Nayak ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Plasma Focus ◽  
Energetic Electron ◽  
Plasma Focus Device ◽  
Self Organized ◽  
Polyaniline Nanowires

Modification of lattice structure and magnetic properties of Fe-Rh alloys by energetic electron irradiation

2003 ◽  
Vol 792 ◽  
Author(s):  
Masafumi Fukuzumi ◽  
Ryoichi Taniguchi ◽  
Seiji Komatsu ◽  
Fumihisa Ono ◽  
Akihiro Iwase
Keyword(s):  
Magnetic Properties ◽  
Transition Temperature ◽  
Electron Irradiation ◽  
Quantum Interference ◽  
Lattice Structure ◽  
Energetic Electron ◽  
Lattice Parameter ◽  
Superconducting Quantum Interference Device ◽  
Precise Control ◽  
B2 Structure

ABSTRACTIn order to modify the lattice structure and magnetic properties, we irradiate Fe-50at.%Rh alloys with 8 MeV electrons at room temperature. Effects of irradiation are investigated by using Superconducting QUantum Interference Device (SQUID) and X-Ray Diffractometer (XRD).Although the crystal structure is not changed by the irradiation and remains the B2 structure, the lattice parameter increases by about 0.1–0.3 % and the antiferromagnetic(AF)-ferromagnetic(FM) transition temperature decreases by 3–18 deg. with increasing the electron fluence. The present result shows that energetic electron irradiation can be used for the precise control of AF-FM transition temperature of Fe-50at.%Rh alloy.

Effect of energetic electron irradiation on graphene and graphene field-effect transistors

2011 ◽  
Author(s):  
Isaac Childres ◽  
Michael Foxe ◽  
Igor Jovanovic ◽  
Yong P. Chen
Keyword(s):  
Electron Irradiation ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Energetic Electron

Effect of energetic electron irradiation upon charged-particle track registration in polycarbonate films

1973 ◽  
Vol 106 (2) ◽  
pp. 295-299 ◽  
Author(s):  
A.N. Goland ◽  
E. der Mateosian
Keyword(s):  
Charged Particle ◽  
Electron Irradiation ◽  
Energetic Electron ◽  
Particle Track
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