scholarly journals Direct Observation of Short-Range Structural Coherence During a Charge Transfer Induced Spin Transition in a CoFe Prussian Blue Analogue by Transmission Electron Microscopy

2015 ◽  
Vol 137 (46) ◽  
pp. 14686-14693 ◽  
Author(s):  
Miho Itoi ◽  
Toyoharu Jike ◽  
Daisuke Nishio-Hamane ◽  
Seiichi Udagawa ◽  
Tetsuya Tsuda ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Charge Transfer ◽  
Prussian Blue ◽  
Short Range ◽  
Spin Transition ◽  
Prussian Blue Analogue ◽  
Transmission Electron ◽  
Structural Coherence ◽  
A Charge

scholarly journals Charge transfer driven by ultrafast spin transition in a CoFe Prussian blue analogue

2020 ◽  
Vol 13 (1) ◽  
pp. 10-14
Author(s):  
Marco Cammarata ◽  
Serhane Zerdane ◽  
Lodovico Balducci ◽  
Giovanni Azzolina ◽  
Sandra Mazerat ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Prussian Blue ◽  
Spin Transition ◽  
Prussian Blue Analogue

Quantitative in situ hot-stage high-resolution Transmission Electron Microscopy

1994 ◽  
Vol 52 ◽  
pp. 758-759
Author(s):  
J. M. Howe
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Interfacial Structure ◽  
Interface Motion ◽  
Charge Coupled Device ◽  
Transmission Electron ◽  
Interface Theory ◽  
A Charge

In situ hot-stage high-resolution transmission electron microscopy (HRTEM) provides unique capabilities for quantifying the dynamics of interfaces at the atomic level. Such information complements detailed static observations and calculations of interfacial structure, and is essential for understanding interface theory and solid-state phase transformations. This paper provides a brief description of particular requirements for performing in situ hot-stage HRTEM and illustrates the use of this technique to obtain quantitative data on the atomic mechanisms and kinetics of interface motion during precipitation of {111} θ phase in an Al-Cu-Mg-Ag alloy.The specimen and microscope requirements for in situ hot-stage HRTEM are not much different from those of static HRTEM, except that one must have a heating holder and equipment for recording and analyzing dynamic images. At present, most HRTEMs are equipped with a TV-rate camera, possibly combined with a charge-coupled device camera. An inexpensive way to record in situ HRTEM images is to send the output from the TV-rate camera directly into a standard VHS format videocassette recorder (VCR).

Transmission Electron Microscopy (TEM) Studies of Ge Nanocrystals

2004 ◽  
Vol 818 ◽  
Author(s):  
Q. Xu ◽  
I.D. Sharp ◽  
C.Y. Liao ◽  
D. O. Yi ◽  
J.W. Ager ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Beam ◽  
Carbon Films ◽  
Ultrasonic Dispersion ◽  
Transmission Electron ◽  
Before And After ◽  
The Matrix ◽  
A Charge ◽  
Ge Nanocrystals

Abstract74Ge nanocrystals were formed by ion beam synthesis in SiO2. Transmission Electron Microscopy was used to characterize the structure and properties of these Ge nanocrystals before and after liberation from the matrix. The liberation from the SiO2matrix was achieved through selective etching in a HF bath. High-resolution micrographs and selective area diffraction confirm that the crystallinity is retained in this process. Transfer of released nanocrystals is achieved through ultrasonic dispersion in methanol and deposition onto lacey carbon films via evaporation of methanol. In an effort to determine the melting point of Ge nanocrystals and observe the growth and evolution of nanocrystals embedded in the amorphous SiO2during heat treatment, as-grown nanocrystals were heatedin-situup to 1192°C±60°C in a JEOL 200CX analytical electron microscope. Electron diffraction patterns are recorded using a Charge-Coupled Device. A large melting hysteresis was observed around the melting temperature of bulk Ge.

Internalization of DMSA-Coated Fe3O4 Magnetic Nanoparticles into Mouse Macrophage Cells

2012 ◽  
Vol 455-456 ◽  
pp. 1221-1227
Author(s):  
Ying Xun Liu ◽  
Zhong Ping Chen ◽  
Jin Ke Wang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Nanoparticles ◽  
Cell Viability ◽  
Prussian Blue ◽  
Biomedical Applications ◽  
Blue Staining ◽  
Mouse Macrophage ◽  
Cytoplasmic Inclusions ◽  
Transmission Electron

This study observed the internalization of Fe3O4magnetic nanoparticles (MNPs) coated with meso-2, -3-dimercaptosuccinnic acid (DMSA) into mouse macrophage RAW264.7 by using transmission electron microscopy (TEM) and Prussian blue staining. The results showed that the DMSA-coated Fe3O4MNPs could be efficiently internalized into RAW264.7 cells. The internalized DMSA-coated Fe3O4MNPs located in the cytoplasmic inclusions. The internalization of DMSA-coated Fe3O4MNPs did not significantly affect the cell viability at given doses (20, 30, 40, 50 and 100 μg/mL) and incubation times (2, 12, 24, 48 and 72 hours), suggesting DMSA-coated Fe3O4MNPs had better biocompatibility. This study demonstrated that DMSA-coated Fe3O4MNPs may provide a potential nanomaterial for biomedical applications.

Boundary Line of Microcrystallites in Amorphous and Crystalline Structures of Metallic Glasses

2009 ◽  
Vol 283-286 ◽  
pp. 123-127
Author(s):  
Khaled Habib ◽  
A. Al-Arbeed
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Metallic Glasses ◽  
Short Range ◽  
Boundary Line ◽  
X Ray Diffraction ◽  
Mathematical Relationship ◽  
Ordered Structures ◽  
X Ray ◽  
Transmission Electron

In a recent study conducted by the author, microcrystallites were observed to exist in amorphous, short range ordered, structures of several metallic glasses. The observation is based on X-Ray Diffraction (XRD) and Electron Diffraction (ED) and Transmission Electron Microscopy (TEM). The data from the X-ray diffraction shows that the metallic glasses have typical amorphous structures. However, the data from the Electron Diffraction indicates that the metallic glasses possess polycrystalline structures. This discrepancy between the XRD and ED data can be interpreted and explained by diffraction theory [1,2] with the aid of Transmission Electron Microscopy. In fact results in the recent work show that with a mathematical relationship originally derived by Sherrer [1], one can determine the boundary line between microcrystallites in amorphous, short range ordered, structures and crystalline, long range ordered, structures. The boundary line of microcrystallites is defined with the aid of Transmission Electron Microscopy in which the size of subgrains, of the metallic glasses was determined from the mathematical relationship.

Early Stages of Ordering in Ni3Mo

1971 ◽  
Vol 29 ◽  
pp. 124-125
Author(s):  
S. K. Das
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Long Range ◽  
Short Range ◽  
Ordered Structure ◽  
General Sense ◽  
Early Stages ◽  
Transmission Electron ◽  
Ordered State ◽  
Word Cluster

The very early stages of ordering in Ni3Mo has been investigated by transmission electron microscopy and diffraction. The short range ordered state in this alloy is similar, hut not identical to that of Ni4Mo. On quenching from 1300°C, in addition to the diffuse peaks at () positions, diffuse peaks also appear at positions very close to where the long range ordered Ni4Mo and Ni2Mo peaks should appear (Fig. 1). This suggests that in the short range ordered state this alloy has clusters of Ni4Mo and Ni2Mo type. Thus the structure in the short range ordered state may consist of not one hut several types of clusters, the structure of which can he different from its long range ordered structure. The word cluster is used here in the general sense of the term to mean groups of atoms of two species A and B.

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