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HOMEPAGE     |    BIOGRAPHY     |    BIBLIOGRAPHY    |    PROJECTS


 

 

dr. Nina Daneu

 

 

e-mail nina.daneu@ijs.si · tel +386 1 4773 734 · fax +386 1 4773 221 · skype nina.daneu

»Jožef Stefan« Institute

 

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Department for Nanostructured Materials

 

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e-mail: nina.daneu@ijs.si

 

 

– by research topic –

Inversion Boundaries In Zinc Oxide · Twins in Minerals · Analytical Electron Microscopy ·

 

Mechanichemically Prepared Nanomaterials · Analytical Electron Microscopy ·

 

 

 

 

 

Inversion Boundaries in Zinc Oxide

Inversion boundaries (IB) nucleate in ZnO grains during sintering of ZnO with small additions of antimony (Sb2O3), tin (SnO2) and titanium (TiO2) oxides.

IBs have an important role in ZnO grain growth!

 

Find out more here!

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Twin Boundaries in Minerals

Our analyses of growth twin boundaries (TB) in various minerals have shown a close correlation between the structure of these 2D defects and polytype/polymorph that forms by the reaction between the major phase and the dopant at elevated temperatures. The twinning can thus be regarded as a preparatory stage of structural transformations in minerals.

 

(101) rutile twin

(301) rutile twin

(111) spinel twin

(101) pyrite twin

    (101) rutile twin VAR2 copy                         

(301) rutile twin VAR2 copy

(111) SPINEL TWIN

Pirite twin Katarina

Click on the mineral image to learn more about it!

 

CEP - Concentric Electron Probe

A new method of analytical electron microscopy for
determination of extremely small amounts of dopants at planar faults

In the process of atomic structure and chemical composition retrieval of IBs in ZnO we developed a new method of analytical TEM, which enables accurate and precise determination of chemical composition of interfaces on subnanometric level. The method is dedicated for determination of fine structural elements at the initial stage of phase transformations by providing up to 2 orders of magnitude more accurate results compared to the existing analytical TEM methods. The technique was originally developed on the inversion boundaries in zinc oxide and it is widely used in solving the defect structures in various materials.

Is the method useful for you? Find out here!

 

CEP

 

Mechanichemically Prepared Nanomaterials

PbSe_04_cubes

Bilateral cooperation with Slovakia

Marcela Achimovičová · Slovak Academy of Sciences · Košice

 

 

 


 

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