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The Features of Investigations and Observations of Nanoamorphous Metals and Nanocrystalline Oxides on Electron Microscope

Published online by Cambridge University Press:  01 February 2011

R. Malkhasyan ,
R. Karakhanyan ,
M. Nazaryan ,
A. Khachatryan  and
A. Markosyan
R. Malkhasyan
Affiliation:
Scientific Production Enterprise “ATOM”, Tevosyan st. 3/1 Yerevan 375076, Republic of Armenia, E-mail: [email protected]
R. Karakhanyan
Affiliation:
Scientific Production Enterprise “ATOM”, Tevosyan st. 3/1 Yerevan 375076, Republic of Armenia, E-mail: [email protected]
M. Nazaryan
Affiliation:
Scientific Production Enterprise “ATOM”, Tevosyan st. 3/1 Yerevan 375076, Republic of Armenia, E-mail: [email protected]
A. Khachatryan
Affiliation:
Scientific Production Enterprise “ATOM”, Tevosyan st. 3/1 Yerevan 375076, Republic of Armenia, E-mail: [email protected]
A. Markosyan
Affiliation:
Scientific Production Enterprise “ATOM”, Tevosyan st. 3/1 Yerevan 375076, Republic of Armenia, E-mail: [email protected]
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Abstract

The present paper discusses two different active influences of an electron beam on a nanosize sample.

The first observed influence is the formation of nanoparticle agglomerates due to the beam charge. This can be likened to the formation of fine sand and it enables the determination of grain magnitude of the given nanomaterial. This also enables to get a clear picture of the sample, which is latent at first due to the coating of nanoparticles and their agglomerates. For example, removal of nanopowder coatings has enabled for the first time to find self - assembling systems in a shape of double chain spatial helixes from inorganic particles (as DNA).

The second type of influence is related to transformations, which distort the sample. Transformation of amorphous particles of metal into a crystalline state by means of local heating is the one of most importance.

Growth of thread-shaped hollow and solid nanowhiskers from nanoparticles and their further disintegration to a great number of small crystals under influence of electron beam in the chamber of electron microscope was observed. Therefore it can be confirmed that it is necessary to use an electron microscope with special precautionary measures, when working with nanoamorphous metals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 839: Symposium P – Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry, and Structure , 2004 , P3.9
Copyright
Copyright © Materials Research Society 2004

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References

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