New role of screw dislocation in twin lamella during deformation: An in situ TEM study at the atomic scale

2018 ◽  
Vol 729 ◽  
pp. 125-129 ◽  
Author(s):  
Zongde Kou ◽  
Yanqing Yang ◽  
Lixia Yang ◽  
Bin Huang ◽  
Yanxia Chen ◽  
...  
Keyword(s):  
Screw Dislocation ◽  
Atomic Scale ◽  
In Situ Tem ◽  
Twin Lamella

scholarly journals An In situ TEM study of the surface oxidation of palladium nanocrystals assisted by electron irradiation

Nanoscale ◽  
2017 ◽  
Vol 9 (19) ◽  
pp. 6327-6333 ◽  
Author(s):  
Dejiong Zhang ◽  
Chuanhong Jin ◽  
He Tian ◽  
Yalin Xiong ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Surface Oxidation ◽  
Atomic Scale ◽  
In Situ Tem

An In situ atomic scale study of the surface oxidation of Pd nanocrystals.

Atomic-scale quasi in-situ TEM observation on the redistribution of alloying element Cu in a B4C/Al composite at the initial stage of corrosion

2020 ◽  
Vol 174 ◽  
pp. 108808 ◽  
Author(s):  
Y.T. Zhou ◽  
Y.N. Zan ◽  
Q.Z. Wang ◽  
B.L. Xiao ◽  
Z.Y. Ma ◽  
...  
Keyword(s):  
Atomic Scale ◽  
In Situ Tem ◽  
Alloying Element ◽  
Initial Stage ◽  
Al Composite

In-situ TEM mechanical characterization of nanowire in atomic scale using MEMS device

2017 ◽  
Vol 24 (4) ◽  
pp. 2045-2049 ◽  
Author(s):  
Xiao Zhang ◽  
Yang Yang ◽  
Fangfang Xu ◽  
Tie Li ◽  
Yuelin Wang
Keyword(s):  
Mechanical Characterization ◽  
Atomic Scale ◽  
In Situ Tem ◽  
Mems Device

Nanomeasurements of individual carbon nanotubes by in situ TEM

2000 ◽  
Vol 72 (1-2) ◽  
pp. 209-219 ◽  
Author(s):  
Z. L. Wang ◽  
P. Poncharal ◽  
W. A. de Heer
Keyword(s):  
Carbon Nanotubes ◽  
Complete Characterization ◽  
Atomic Scale ◽  
In Situ Tem ◽  
Mechanical And Electrical Properties ◽  
Novel Approach ◽  
Transmission Electron ◽  
Electron Field

Property characterization of nanomaterials is challenged by the small size of the structure because of the difficulties in manipulation. Here we demonstrate a novel approach that allows a direct measurement of the mechanical and electrical properties of individual nanotube-like structures by in situ transmission electron microscopy (TEM). The technique is powerful in a way that it can be directly correlated to the atomic-scale microstructure of the carbon nanotube with its physical properties, thus providing a complete characterization of the nanotube. Applications of the technique will be demonstrated in measurements of the mechanical properties, the electron field emission, and the ballistic quantum conductance of individual carbon nanotubes. A nanobalance technique is demonstrated that can be applied to measure the mass of a single tiny particle as light as 22 fg (1 f = 10-15 ).

scholarly journals Robust procedure for creating and characterizing the atomic structure of scanning tunneling microscope tips

2017 ◽  
Vol 8 ◽  
pp. 2389-2395 ◽  
Author(s):  
Sumit Tewari ◽  
Koen M Bastiaans ◽  
Milan P Allan ◽  
Jan M van Ruitenbeek
Keyword(s):  
Atomic Structure ◽  
Scanning Tunneling Microscope ◽  
Critical Role ◽  
Atomic Layer ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Stm Tips

Scanning tunneling microscopes (STM) are used extensively for studying and manipulating matter at the atomic scale. In spite of the critical role of the STM tip, procedures for controlling the atomic-scale shape of STM tips have not been rigorously justified. Here, we present a method for preparing tips in situ while ensuring the crystalline structure and a reproducibly prepared tip structure up to the second atomic layer. We demonstrate a controlled evolution of such tips starting from undefined tip shapes.

In-Situ TEM Deformation Studies of Dislocation Generation and Motion in High-Purity MO Single Crystals

1999 ◽  
Vol 578 ◽  
Author(s):  
M. Jouiad ◽  
B. W. Lagow ◽  
I. M. Robertson ◽  
D. H. Lassila
Keyword(s):  
Single Crystals ◽  
Screw Dislocation ◽  
High Purity ◽  
In Situ Tem ◽  
Dislocation Source ◽  
Dislocation Generation ◽  
Transmission Electron ◽  
Dislocation Tangle ◽  
Source Operation

AbstractThe generation and motion of dislocations in high-purity single crystals of Mo have been observed in real time by deforming electron-transparent samples in-situ in a transmission electron microscope. At 300 K and at low levels of stress, a novel dislocation source was observed that generated a long, straight screw dislocation. The source was a dislocation tangle that existed in the annealed material. An edge dislocation emerged from the tangle, trailing behind it the screw dislocation. These screw dislocations were immobile at this stress level. At higher stresses, the same dislocation tangle generated many dislocations, but now by a pole mechanism. The nature of these tangles and the source operation mechanisms will be described.

Clarifying the Role of Mg2Si and Si in Localized Corrosion of Aluminum Alloys by Quasi In Situ Transmission Electron Microscopy

CORROSION ◽  
10.5006/3457 ◽  
2020 ◽  
Vol 76 (5) ◽  
pp. 464-475 ◽  
Author(s):  
Shravan K. Kairy ◽  
Nick Birbilis
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnesium Silicide ◽  
Localized Corrosion ◽  
In Situ Tem ◽  
Al Alloy ◽  
Transmission Electron ◽  
Al Matrix

The role of magnesium silicide (Mg2Si) and silicon (Si) particles in the localized corrosion of aluminum (Al) alloys was investigated herein. Sub-micrometer-sized Mg2Si and Si particles were grown in the Al matrix of Al-Mg-Si and Al-Si alloys, respectively, and characterized by transmission electron microscopy (TEM). A quasi in situ TEM technique was used to study an identical location containing Mg2Si or Si particle in the Al matrix, prior to and following a period of immersion in 0.1 M NaCl at pH 6, 2, and 12. At pH 6 and 2, Mg2Si was initially “anodic,” preferentially dealloying via selective dissolution of Mg, resulting in the development of SiO-rich remnants that are electrochemically inert. The SiO-rich remnants at pH 2 physically detached from the Al matrix. Silicon particles were electrochemically inert at pH 6, while “cathodic” at pH 2, dissolving the Al matrix at their periphery. It was observed that copper (Cu) was redeposited on Si particles at pH 2. At pH 12, Mg2Si and Si were “cathodic” to the Al matrix. This study clarifies, and provides new insights into, the characteristics of Al alloy physical manifestation of corrosion associated with Mg2Si and Si at the nanoscale.

scholarly journals Using In-Situ TEM to Investigate the Role of Lithium Iodide Addition to Lithium Thiophosphate

2021 ◽  
Vol 27 (S1) ◽  
pp. 3426-3427
Author(s):  
Nikhilendra Singh ◽  
James Horwath ◽  
Timothy Arthur ◽  
Daan Hein Alsem ◽  
Marm Dixit ◽  
...  
Keyword(s):  
In Situ Tem ◽  
Lithium Iodide
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