I don't see any special arrangement of the nanoparticles. There is just a difference in magnification :)
Dear colleague Shubhangi Shukla ,
Have a nice time and good day.
What is the effective parameter in two TEM photos?
dear colleagues,
it is not that I have unnecessarily asked the question, but I am really confused how to explain these figures in the context of the different concentrations of the two elements involved, as there is a difference in the order of arrangements of the nanoparticles?
Never mind :)
If you will spill ink on a paper, there will be an "arrangement". How to explain this figure?
It's just a randomness. The figures on your pictures are same thing.
These two images just due to magnification setting nothing else both are same.
Second image is the magnified image of the first one. The size of the scale bar is different and from there you can calculate the size.
I don't know exactly whether both images were taken from the same material or not. I guess those images were taken from the same material but different magnification as we see from the bar scale. There are many particle shapes, ie spherical, cylindrical, out of round (oblong), cubical, flaky, needle like. Your material particles consists of many shapes ie. sphere, rectangular, cubical. Beside those shapes, I look there are many plates with stacking faults that result hexagonal or triangular plates. If you are interested to calculate the particle size, just measure the longest diameter of every particle, than take it into account the average. You can compare to bar scale in your image. Hope can help.
Well, they appear to be taken in the same mode (C-TEM or BF-TEM), the focus is little off at both of them (probably eucentric height was not set properly of focus was not right), most probably were taken with gatan camera (one of the new ones, K-2 maybe?).
The particles are "not crystallographically related" - they're just agglomerated due to drying of the sample (while there are still some residues around the particles, probably from the solution), most of them are lying on the same plane as carbon substrate, few of them are piled up one on another... looks like some magnetite precipitated from some sort of solution :-)
Yes, I agree with Dr Janej,
If possible, please sonicate the sample and repeat TEM. You should get better results.
Best
I would suggest to have the two electron photomicrographs scaled to the same magnification for a comparison. The nanoparticles appear to be heterogeneous in size and shape. As they are shown in the electron photomicrographs, the particles do not appear to have a definitive and organized arrangement. You probably would need to have more photomicrographs in order to carry out a more thorough morphological comparison and/or analysis.
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