Dear all,

 

I would like to measure manganese oxide nanoparticles at the Mn K edge.

 

The nanoparticles are affixed to polystyrene latex carrier particles (PS) and the whole composite material (MnO2@PS with ca. 5 m-% MnO2 in the composite) is dispersed in water.

 

Therefore we consider measuring the composite material in the dried state as a powder as well as in the dispersed state in water. The sample preparation for powders to me is quite straight forward, but I would really appreciate if somebody could share his experience with sample preparation and measurements of liquid samples.

 

I think that aqueous samples are best measured in the fluorescence mode. That’s why I am concerned of problems like self-absorption and so on.

 

Can anybody tell my what is a good concentration range to overcome effects like self-absorption and how to get good fluorescence data in general? And what kind of sampler holder or materials (cuvettes, etc.) are best suited for aqueous samples?

 

 

I am looking forward to receiving some helpful replies!

 

 

Cheers,

 

Frank

 

 

Dipl. Chem. Frank Polzer

F-I2 - Soft Matter and Functional Materials

Helmholtzzentrum Berlin für Materialien und Energie

Lise-Meitner-Campus

Hahn-Meitner-Platz 1

14109 - Berlin

 

Tel.: +49 30 8062-43830

Fax:  +49 30 8062-42308

 

frank.polzer@helmholtz-berlin.de

 

 

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