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3,288 Newest Publications about the topic microscopes

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In situ E‐SEM and TEM observations of the thermal annealing effects on ion‐amorphized 6H‐SiC single crystals and nanophased SiC fibers

21-11-2014 | Juan Huguet‐Garcia, Aurelien Jankowiak, Sandrine Miro, Renaud Podor, Estelle Meslin, Yves Serruys, Jean‐Marc Costantini, physica status solidi (b), 2014

Abstract Hi Nicalon type S (HNS) SiC fiber and 6H‐SiC single crystals have been irradiated with 4 MeV Au3+ at room temperature (RT) and to a fluence of 2 × 1015 cm−2. These irradiation conditions lead to the complete amorphization of the irradiated layer in both samples. Post‐irradiation ...

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Low Voltage Transmission Electron Microscopy of Graphene

18-11-2014 | Alicja Bachmatiuk, Jiong Zhao, Sandeep Madhukar Gorantla, Ignacio Guillermo Gonzalez Martinez, Jerzy Wiedermann, Cha ..., Small, 2014

The initial isolation of graphene in 2004 spawned massive interest in this two‐dimensional pure sp2 carbon structure due to its incredible electrical, optical, mechanical, and thermal effects. This in turn led to the rapid development of various characterization tools for graphene. Examples ...

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What environmental transmission electron microscopy measures and how this links to diffusivity: thermodynamics versus kinetics

17-11-2014 | THOMAS WALTHER, Journal of Microscopy, 2014

Summary Environmental or in situ electron microscopy means the observation of material in its native environment, which can be gaseous or liquid, as compared to more traditional post‐mortem electron microscopy carried out under (ultra) high vacuum conditions. Experiments can be performed on ...

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Molecules, Vol. 19, Pages 18381-18398: Data-Driven Techniques for Detecting Dynamical State Changes in Noisily Measured 3D Single-Molecule Trajectories

12-11-2014 | Calderon, Christopher P., Molecules, 2014

Optical microscopes and nanoscale probes (AFM, optical tweezers, etc.) afford researchers tools capable of quantitatively exploring how molecules interact with one another in live cells. The analysis of in vivo single-molecule experimental data faces numerous challenges due to the complex, ...

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Fixed-Gap Tunnel Junction for Reading DNA Nucleotides

12-11-2014 | Pei Pang; Brian Alan Ashcroft; Weisi Song; Peiming Zhang; Sovan Biswas; Quan Qing; Jialing Yang; Robert J. Nemanich; ..., ACS Nano, 2014

Previous measurements of the electronic conductance of DNA nucleotides or amino acids have used tunnel junctions in which the gap is mechanically adjusted, such as scanning tunneling microscopes or mechanically controllable break junctions. Fixed-junction devices have, at best, detected the ...

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New capabilities for `colouring in' the chemistry of crystal defects atom‐by‐atom

29-10-2014 | Sarah J. Haigh, Acta Crystallographica Section A, 2014

The latest generation of scanning transmission electron microscopes equipped with high‐efficiency energy‐dispersive X‐ray detectors are breaking new ground with respect to high‐resolution elemental imaging of materials. In this issue, Paulauskas et al. [Acta Cryst. (2014), A70, 524531] ...

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Synthesis of polyethyleneimine (PEI) and β‐cyclodextrin grafted PEI nanocomposites with magnetic cores for lipase immobilization and esterification

27-10-2014 | Mehdi Khoobi, Masoud Khalilvand‐Sedagheh, Ali Ramazani, Zahra Asadgol, Hamid Forootanfar, Mohammad Ali Faramarzi, Journal of Chemical Technology & Biotechnology, 2014

Abstract Background Fabrication of nanocomposites with magnetic core and their applications for enzyme immobilization has been introduced as an intresting trend during the last decades. The present study described the synthesis of polyethyleneimine (PEI) and β‐cyclodextrin grafted PEI ...

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Nobel for microscopy that reveals inner world of cells

16-10-2014 | Van Noorden, Richard;, Nature, 2014

Nobel for microscopy that reveals inner world of cells Nature 514, 7522 (2014). http://www.nature.com/doifinder/10.1038/nature.2014.16097 Author: Richard Van Noorden Three scientists used fluorescent molecules to defy the limits of ...

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Deformation Behavior of the Percolating Intermetallic Microstructure of High Pressure Die Cast AZ91 Alloy

13-09-2013 | Bao Zhang, Anumalasetty V. Nagasekhar, Tharmalingam Sivarupan, Carlos H. Caceres, Advanced Engineering Materials, 2013

The intermetallic microstructure in two representative regions of the cross section, the corner and the core, of a cast‐to‐shape tensile specimen was studied. Available 3D data of the intermetallic, obtained with focused dual ion beam tomography, were incorporated into a finite element code to ...

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A new method to improve the stability, tensile strength, and heat resistant properties of shape‐memory epoxy resins: Two‐stages curing

13-09-2013 | He Sun, Yuyan Liu, Huifeng Tan, Xingwen Du, Journal of Applied Polymer Science, 2013

ABSTRACT In this article, we design a new thermal curing method: two‐stage curing. The purpose of using this approach is to maintain the excellent shape‐memory property of epoxy resin system after first stage curing, and the material can be folded in small size to storage or transportation and ...

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