Dynamic observation on the functional metal oxide conversion behaviors in Fe3O4/ZnO heterostructures

2020 ◽  
Vol 177 ◽  
pp. 192-197 ◽  
Author(s):  
Chih-Yang Huang ◽  
Kuo-Lun Tai ◽  
Chun-Wei Huang ◽  
Yi-Tang Tseng ◽  
Hung-Yang Lo ◽  
...  
Nano Letters ◽  
2015 ◽  
Vol 15 (9) ◽  
pp. 5755-5763 ◽  
Author(s):  
Kai He ◽  
Feng Lin ◽  
Yizhou Zhu ◽  
Xiqian Yu ◽  
Jing Li ◽  
...  

2017 ◽  
Vol 121 (47) ◽  
pp. 26379-26388 ◽  
Author(s):  
S. J. Rezvani ◽  
F. Nobili ◽  
R. Gunnella ◽  
M. Ali ◽  
R. Tossici ◽  
...  

Author(s):  
R.A. Ploc

The manner in which ZrO2 forms on zirconium at 300°C in air has been discussed in the first reference. In short, monoclinic zirconia nucleates and grows with a preferred orientation relative to the metal substrate. The mode of growth is not well understood since an epitaxial relationship which gives minimum misfit between the zirconium ions in the metal/oxide combination is not realized. The reason may be associated with a thin cubic or tetragonal layer of ZrO2 between the inner oxygen saturated metal and the outer monoclinic zirconia.


Author(s):  
Akira Tonomura

Electron holography is a two-step imaging method. However, the ultimate performance of holographic imaging is mainly determined by the brightness of the electron beam used in the hologram-formation process. In our 350kV holography electron microscope (see Fig. 1), the decrease in the inherently high brightness of field-emitted electrons is minimized by superposing a magnetic lens in the gun, for a resulting value of 2 × 109 A/cm2 sr. This high brightness has lead to the following distinguished features. The minimum spacing (d) of carrier fringes is d = 0.09 Å, thus allowing a reconstructed image with a resolution, at least in principle, as high as 3d=0.3 Å. The precision in phase measurement can be as high as 2π/100, since the position of fringes can be known precisely from a high-contrast hologram formed under highly collimated illumination. Dynamic observation becomes possible because the current density is high.


Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8065-8094 ◽  
Author(s):  
Xudong Wen ◽  
Jingqi Guan

Different kinds of electrocatalysts used in NRR electrocatalysis (including single atom catalysts, metal oxide catalysts, nanocomposite catalysts, and metal free catalysts) are introduced.


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