Is one can use colloidal solution of nanoparticles for SEM,TEM,AFM,XRD etc,or it is necessary to dry,separate NP's from the solution.Is characterization of nanoparticles can be made with the capping agent if no then why?
Thanks in advance
,best regards
Muhammad imran khattak
Yes you can measure nanoparticle with capping agent. TEM, STM will be most suitable.
If you want to characterise your nanoparticles in solution then dynamic light scattering may be useful. Measuring the zeta potential of your colloids in solution via electrophoritic light scattering can also give insight to colloidal stability.
If performing DLS and TEM etc, caution should be used when comparing the results as the two methods measure different quantities. TEM will give you the physical size, as well as shape, of your particles, whereas DLS measures many particles concurrently and reports the hydrodynamic radius of your particles.
Thank YOU so much,dear professors, Asit Baran,Alexander Malm and Deeraj Bds,for your valuable answer,its realy cleared me.
Dear professors ,Would you kindly tell me ?
1.what i should do if my capping agent couldn't able to stablize nanoparticles for long time and I don't want to change my capping agent.(and I have to send NP sample to other institutions because my institute lacking TEM,DLS,etc facilities)
2.how to avoid size change of nanoparticles during drying process because when NP's are heated in furnace or oven they agglomerate (get lager size).(large NP 's are not good for applications purpose. Kindly suggest.
Thanks in advance dear professors.
Best regards
Muhammad imran khattak
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