In Situ Electron Microscopy Four-Point Electromechanical Characterization of Freestanding Metallic and Semiconducting Nanowires

Small ◽  
2013 ◽  
Vol 10 (4) ◽  
pp. 725-733 ◽  
Author(s):  
Rodrigo A. Bernal ◽  
Tobin Filleter ◽  
Justin G. Connell ◽  
Kwonnam Sohn ◽  
Jiaxing Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Semiconducting Nanowires ◽  
In Situ Electron Microscopy ◽  
Electromechanical Characterization

In Situ Characterization of Dynamic Changes in the Microstructure and Chemistry of Catalysts

2001 ◽  
Vol 7 (S2) ◽  
pp. 1058-1059
Author(s):  
P.A. Crozier
Keyword(s):  
Electron Microscopy ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Catalytic Reactions ◽  
In Situ Characterization ◽  
Dynamic Changes ◽  
In Situ Electron Microscopy ◽  
Reactive Gas

Controlled atmosphere electron microscopy (CAEM) is a form of in situ microscopy in which the sample is exposed to a reactive gas during observation. This instrument essentially combines the nano-structural characterization features of a TEM with a microreactor and is ideal for studying gas/solid reactions in catalysts. Such in situ techniques can provide a link between surface studies performed under UHV conditions and catalytic reactions run in high-pressure reactors. with correctly designed experiments, CAEM is a powerful technique for correlating dynamic changes in microstructure with catalysis and can be used to provide insights on the location of active sites and mechanisms for catalysis. Baker and colleagues have worked for over thirty years on different heterogeneous catalysts using in situ electron microscopy (see [1] for example). Gai has also published many studies on the application of CAEM to oxide catalysts [2].The technique usually relies on detecting a change in the heterogeneous catalyst during a catalytic reaction.

scholarly journals In Situ Electron Microscopy Characterization of Optoelectronic Nanostructures and Nanodevices

2010 ◽  
Vol 16 (S2) ◽  
pp. 1758-1759
Author(s):  
M Gao ◽  
C Li ◽  
W Li ◽  
Z Liu ◽  
L-M Peng
Keyword(s):  
Electron Microscopy ◽  
In Situ Electron Microscopy ◽  
Microscopy Characterization

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

In situ electron microscopy characterization of intracellular ion pools in mineral forming microalgae

2020 ◽  
Vol 210 (1) ◽  
pp. 107465
Author(s):  
Yuval Kadan ◽  
Lior Aram ◽  
Eyal Shimoni ◽  
Smadar Levin-Zaidman ◽  
Shilo Rosenwasser ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
In Situ Electron Microscopy ◽  
Microscopy Characterization

scholarly journals Characterization of Nickel Oxide Nanoplates Using STEM Tomography and In-situ Electron Microscopy

2011 ◽  
Vol 17 (S2) ◽  
pp. 936-937 ◽  
Author(s):  
A Shukla ◽  
P Ercius ◽  
A Gautam ◽  
J Cabana ◽  
U Dahmen
Keyword(s):  
Electron Microscopy ◽  
Nickel Oxide ◽  
In Situ Electron Microscopy ◽  
Stem Tomography

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

scholarly journals Fabrication of a liquid cell for in situ transmission electron microscopy

Microscopy ◽  
2020 ◽  
Author(s):  
Xiaoguang Li ◽  
Kazutaka Mitsuishi ◽  
Masaki Takeguchi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cost Effective ◽  
Production Method ◽  
Microscopy Imaging ◽  
Transmission Electron ◽  
In Situ Electron Microscopy ◽  
Liquid Cell ◽  
Si Wafer

Abstract Liquid cell transmission electron microscopy (LCTEM) enables imaging of dynamic processes in liquid with high spatial and temporal resolution. The widely used liquid cell (LC) consists of two stacking microchips with a thin wet sample sandwiched between them. The vertically overlapped electron-transparent membrane windows on the microchips provide passage for the electron beam. However, microchips with imprecise dimensions usually cause poor alignment of the windows and difficulty in acquiring high-quality images. In this study, we developed a new and efficient microchip fabrication process for LCTEM with a large viewing area (180 µm × 40 µm) and evaluated the resultant LC. The new positioning reference marks on the surface of the Si wafer dramatically improve the precision of dicing the wafer, making it possible to accurately align the windows on two stacking microchips. The precise alignment led to a liquid thickness of 125.6 nm close to the edge of the viewing area. The performance of our LC was demonstrated by in situ transmission electron microscopy imaging of the dynamic motions of 2-nm Pt particles. This versatile and cost-effective microchip production method can be used to fabricate other types of microchips for in situ electron microscopy.

scholarly journals Design and Characterization of Microscale Auxetic and Anisotropic Structures Fabricated by Multiphoton Lithography

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 446
Author(s):  
Ioannis Spanos ◽  
Zacharias Vangelatos ◽  
Costas Grigoropoulos ◽  
Maria Farsari
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mechanical Performance ◽  
Element Analysis ◽  
Mechanical Responses ◽  
Multiphoton Lithography ◽  
Anisotropic Structures ◽  
Scanning Electron

The need for control of the elastic properties of architected materials has been accentuated due to the advances in modelling and characterization. Among the plethora of unconventional mechanical responses, controlled anisotropy and auxeticity have been promulgated as a new avenue in bioengineering applications. This paper aims to delineate the mechanical performance of characteristic auxetic and anisotropic designs fabricated by multiphoton lithography. Through finite element analysis the distinct responses of representative topologies are conveyed. In addition, nanoindentation experiments observed in-situ through scanning electron microscopy enable the validation of the modeling and the observation of the anisotropic or auxetic phenomena. Our results herald how these categories of architected materials can be investigated at the microscale.

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