I have one query regarding GIXRD results.
I calculated the crystallite size using Debye shrerrer equation of the thin films which is irradiated at different fluence. I am observing in the thin film that crystallite size is increasing with the increase in fluence rate but with this amorphization of the films also enhances.
So is it possible that crystallite size and amorphization increases simultaneously.
GIXRD is probably not the best technique to evaluate crystallite size and amorphisation rate of a material, because the penetration depth strongly depends on the grazing angle.. .
Moreover you mention fluence of irradiation technique.. What type irradiation you use???
Back to the question, D. Simakov and I.J. Slipper have replied shortly but accordingly:
It is difficult to imagine conciliate 1/ the crystallite size growth - meaning space extension of coherency, or better and longer range ordering of atom according to symmetry rules and 2/ the amorphization rate within thin films -meaning more and more random distribution of the elements.
More information on what you are doing and analyzing is required before trying deliver coherent answers.
Best regards
Daniel
I am not aware of any direct dependence of crystallite size on "amorphization".
Your question is not very clear, ( I don't understand your use of the word 'fluence' and 'fluence rate') but I think the answer is no. If crystallite size increases then degree of amorphicity decreases. When crystallite size decreases then amorphicity increases. Please note it is not the "Debye shrerrer formula" but the Scherrer equation.
GIXRD is probably not the best technique to evaluate crystallite size and amorphisation rate of a material, because the penetration depth strongly depends on the grazing angle.. .
Moreover you mention fluence of irradiation technique.. What type irradiation you use???
Back to the question, D. Simakov and I.J. Slipper have replied shortly but accordingly:
It is difficult to imagine conciliate 1/ the crystallite size growth - meaning space extension of coherency, or better and longer range ordering of atom according to symmetry rules and 2/ the amorphization rate within thin films -meaning more and more random distribution of the elements.
More information on what you are doing and analyzing is required before trying deliver coherent answers.
Best regards
Daniel
I would be interested in how do you derive the fraction of amorphisation?
Yes
the amorphous state is the state nanosie crystalline formation. The simplest way to improve the idea is the optical energy gap that is off course possible for semiconductors such as Si. For example the the dark red colour for amorphous state thin film for Si will have energy gap of about 1.6eV, approximately the same value is observed this materials nanoparticls with size smaller than 8nm in diameter
Dr. M. S. Omar
Your question is not clear. In general, though, when the percentage crystallinity of a material decreases its amorphous nature increases
Thanks all for your answers and comments !!!!
I just want to know that with increase in crystallite size parallelly amorphization enhancement of system is possible or not ?
this change may be due to the effect of some doping or some other effects like irradiation of the system, i think that doesn't matter that with which reason I am getting change in structure of the system...
Gert Nolze Sir
I observed the decrease in relative intensity of the peaks in XRD spectra...
Another thing to note is the possible agglomeration of the crystallite. You may not calculate the single crystallite size but rather, you are calculating the agglomeration of them. This might be the reason why the size keep increasing. I have encounter the similar problem with the agglomeration of metallic nanoparticles.
Thanks Md, Rahim Sahar
For your nice answer
Did you published this result of agglomeration of metallic nanoparticles?
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