Re: [Ifeffit] Ifeffit Digest, Vol 189, Issue 2

If the sample is not homogeneous, it doesn’t matter if you use EXAFS or XANES spectra, they originate from the same atoms. Anatoly

On Nov 2, 2018, at 2:39 AM, Raj kumar wrote:

Dear Anatoly and Marcus,

Thanks for your answers. So in this case, i understood, I shouldn't use the extended XAFS region for the analysis. In the other hand, is it allowed to cut the region till 9150 eV and use the data for the XANES analysis?

Regards, Raj

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Today's Topics:

1. Re: Bump/oscillating pattern at high energies of EXAFS (Anatoly Frenkel) 2. Re: Bump/oscillating pattern at high energies of EXAFS (Matthew Marcus) 3. EXAFS of wine (Anatoly Frenkel)

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Message: 1 Date: Thu, 1 Nov 2018 17:47:56 -0400 From: Anatoly Frenkel To: XAFS Analysis using Ifeffit Subject: Re: [Ifeffit] Bump/oscillating pattern at high energies of EXAFS Message-ID: Content-Type: text/plain; charset="utf-8"

It is an effect of inhomogeneity of the sample, that is, the variation in the metal density throughout the X-ray beam footprint. Anatoly

On Thu, Nov 1, 2018 at 5:34 PM Raj kumar wrote:

...

Dear All,

I have monitored the growth process of YbVO4 nanoparticles using EXAFS. Here, nanoparticles were synthesized in water medium. Both initial and final products (EXAFS) of the synthesis were measured using the continuous flow approach whereas the intermediate products were recorded, in the glass capillary, using the stopped flow. In the attached figure, you can find the same (all products). At high energies of EXAFS, both initial and final measurements show smooth behavior whereas the oscillating pattern/bump was observed for the intermediate states.

Here, my question is: Is the oscillating pattern appearing in the intermediate states due to the sedimentation/in-homogeneity of the product in the capillary or it is the characteristic of the synthesis?

With regards, Raj _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit