Befor that i cheak the specification of silver and gold nanoparticles in nanosolution by UV-Spectroscopy test. Can i use the same test with other nanoparticles like Fe3O4 and SiO2?
Dear Nizar,
This is a very interesting question. I must thank you for posting it. In my experience gold and silver nano particles display localized surface plasmon resonance; where the characteristic absorption frequency is acutely dependent on the size and shape of particles (given the size distribution is narrow). Hence, it might be possible to evaluate their size using UV-Vis spectroscopy.
If that was the basis of your evaluation then in my opinion it might not be possible to extend the same principle to Fe3O4 or SiO2 as they lack LSPR. Might I suggest the use of more traditional techniques such as Zeta sizer or SEM/TEM for a more reliable analysis.
I hope it helps.
Regards
Dear Nizar,
This is a very interesting question. I must thank you for posting it. In my experience gold and silver nano particles display localized surface plasmon resonance; where the characteristic absorption frequency is acutely dependent on the size and shape of particles (given the size distribution is narrow). Hence, it might be possible to evaluate their size using UV-Vis spectroscopy.
If that was the basis of your evaluation then in my opinion it might not be possible to extend the same principle to Fe3O4 or SiO2 as they lack LSPR. Might I suggest the use of more traditional techniques such as Zeta sizer or SEM/TEM for a more reliable analysis.
I hope it helps.
Regards
Dear Mr. Nizar,
As Mr. Chaudan already mentioned, the characterization of the size for the nanoparticles via UV-Spectroscopy can only give an estimation of their size, if you want to publish the results in a journal their will be probably reject the size distribution analysis. For the absolute, proper measurement of their size TEM analysis must be done. Also DLS can be done which can give a good size statistic analysis, the dispersion of the nanoparticles can be also studied via AFM.
Concluding, my suggestion is to stay on TEM which will give an accurate size analysis and distribution.
Regards,
G. Peppas
ان التردداد الامتصاصيه تعتمد على الشكل والحجم الحبيبه لذلك من الممكن نحسب حجم باستخدام مطياف الاشعه الفوق البنفسجيه
the absorption frequency is acutely dependent on the size and shape of particles (given the size distribution is narrow). Hence, it might be possible to evaluate their size using UV- spectroscopy.
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