A Facile, Green Route - Electron Beam Irradiation to Nanocrystalline Cadmium Selenide at Room Temperature

2011 ◽  
Vol 284-286 ◽  
pp. 697-702
Author(s):  
Zhen Li ◽  
Li Wei Peng ◽  
Fei Gao ◽  
Deng Yu Pan ◽  
Ming Hong Wu

In this paper, a rapid, facile and green strategy — electron beam irradiation has been developed to prepare CdSe nanoparticles. 10 mA GJ-2-II electronic accelerator was applied as radiation resource. CdSe nanoparticles were synthesized using NH3 as complexing agent by electron beam method in a colloid system, which used Cd(Ac)2 and Na2SeO3 as raw materials. Nanocrystalline CdSe was prepared rapidly at room temperature under atmospheric pressure. The structure and morphology of prepared CdSe nanoparticles were analyzed by X-ray diffraction and transmission electron microscopy. UV–vis spectroscopy (U-3010, Japan Hitachi) and photoluminescence spectroscopy (PL, F-7000, Japan Hitachi) were used to investigate the optical properties of the CdSe nanoparticles. The effects of radiation dose on the formation of CdSe nanocrystallines were discussed. The possible mechanism of the CdSe grain growth by electron beam irradiation method was proposed.

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 7978-7983 ◽  
Author(s):  
Liang Cheng ◽  
Xianfang Zhu ◽  
Jiangbin Su

The coalescence of two single-crystalline Au nanoparticles on surface of amorphous SiOxnanowire, as induced by electron beam irradiation, wasin situstudied at room temperature in a transmission electron microscope.


2004 ◽  
Vol 19 (10) ◽  
pp. 3062-3067 ◽  
Author(s):  
Haiping Sun ◽  
Xiaoqing Pan

When exposed to air at room temperature, Zn nanoparticles oxidize gradually to form crystalline ZnO shells with a thickness of a few nanometers. Electron diffraction and high-resolution lattice imaging revealed that the ZnO layer on the Zn {0001} surface is composed of many epitaxial domains with small rotation angles relative to the lattice of the Zn core. The oxidized Zn particle bends when irradiated by the electron beam in a transmission electron microscope. This is due to the increase of internal stress in the ZnO layer as a result of the realignment of adjacent domains under electron beam irradiation. Corrosion of Zn nanoparticles was observed and the scaling and spalling start to occur on the {1010} prismatic faces.


Author(s):  
B. L. Armbruster ◽  
B. Kraus ◽  
M. Pan

One goal in electron microscopy of biological specimens is to improve the quality of data to equal the resolution capabilities of modem transmission electron microscopes. Radiation damage and beam- induced movement caused by charging of the sample, low image contrast at high resolution, and sensitivity to external vibration and drift in side entry specimen holders limit the effective resolution one can achieve. Several methods have been developed to address these limitations: cryomethods are widely employed to preserve and stabilize specimens against some of the adverse effects of the vacuum and electron beam irradiation, spot-scan imaging reduces charging and associated beam-induced movement, and energy-filtered imaging removes the “fog” caused by inelastic scattering of electrons which is particularly pronounced in thick specimens.Although most cryoholders can easily achieve a 3.4Å resolution specification, information perpendicular to the goniometer axis may be degraded due to vibration. Absolute drift after mechanical and thermal equilibration as well as drift after movement of a holder may cause loss of resolution in any direction.


2010 ◽  
Vol 6 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Rohit Verma ◽  
Ravindra Dhar ◽  
M. C. Rath ◽  
Sisir K. Sarkar ◽  
V. K. Wadhawan ◽  
...  

2020 ◽  
Vol 46 (13) ◽  
pp. 21638-21646
Author(s):  
Ali Mirzaei ◽  
Jae Hoon Bang ◽  
Myung Sik Choi ◽  
Seungmin Han ◽  
Ha Young Lee ◽  
...  

2005 ◽  
Vol 900 ◽  
Author(s):  
Tomoki Akita ◽  
Koji Tanaka ◽  
Masanori Kohyama ◽  
Masatake Haruta

ABSTRACTThe structure of Au nano-particles supported on CeO2 was investigated by using an analytical transmission electron microscope (TEM). The shape change of Au particles was observed during TEM observation, such as shrinking down to a mono-atomic layer on the CeO2 substrate. The electron beam irradiation experiment revealed that the shape change of Au particles is concerning with the oxidation state or the density of oxygen vacancies of CeO2 substrate where the rapid desorption and adsorption of oxygen occurs. It was also found that the reduction by strong electron beam irradiation and subsequent oxidation generate the decoration of Au particles by cerium oxide.


2001 ◽  
Vol 16 (2) ◽  
pp. 553-557 ◽  
Author(s):  
Kazuya Oguri ◽  
Nobuhiro Iwataka ◽  
Akira Tonegawa ◽  
Yoichi Hirose ◽  
Kazuo Takayama ◽  
...  

We developed a diamond surface that does not mist near the room temperature under a saturated humidity atmosphere, by sheet electron beam irradiation (SEBI) treatment. SEBI treatment decreased the time to clear vision of the diamond surface. Following SEBI treatment for 1.91 s (= 0.72 MGy) to a diamond surface, the time to clear vision was less than 2 s. The effective duration time was a few hours. Based on the results of the size distribution of the drops on the misting-free diamond surface following blowing for 3 s, we proposed an explanation for the short time to clear vision of the diamond surface treated by SEBI.


2013 ◽  
Vol 13 (8) ◽  
pp. 5365-5373 ◽  
Author(s):  
Shalini Singh ◽  
Apurav Guleria ◽  
M. C. Rath ◽  
A. K. Singh ◽  
S. Adhikari ◽  
...  

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