We know various properties of nano particles are influenced by size and shape. In particle synthesis arena researchers opt for monodispersity of size. What are the specific applications where size/shape uniformity is vital ? Would anybody respond ?
Depending upon the NP composition, size can have profound effects on plasmonic profiles, influence biological cell uptake kinetics and in the specific case of SPIONS (superparamagnetic ironoxide nanoparticles) influence heating rates induced via an external magnetic field. I'm sure there are more but these come to mind quickly....
Hi Kshetramohan
That is a very interesting question! Do you have any specific question/field in mind where you want to use these nanoparticles? Most (if not all) of the applications of nanoparticles, for example sensors, separation science, medicine would all require them to be of uniform shape and size. Having said that, getting high levels of uniformity is a challenge, especially in these small size ranges.
Cheers!
I would dare say: what areas is size and shape control of nanoparticles *not* critical? (yes, I know that it does not matter for TiO2 in sunscreen etc, but the question is whether something like this qualifies as nanomaterial).
Hi Wayne F Bayer thanks for responding. I agree size has effect on characteristics like plasmonic properties. Let's consider one application of nanoparticles e.g.a specific plasmonic sensor. I don't understand how the sensitivity of a sensor can get influenced by particle size distribution.Whether there is any signal nullification ?
Hi Bhupinder Singh thanks for your response. I don't have any specific field in mind. I don't understand what will happen if I have poly dispersed nanoparticles for a therauptic application.
Hi Thomas Nann. Thanks for looking into the question from another important direction. If TiO2 particles are below 100 nm, why they can't be called nanoparticles ? Probably the wavelength of UV light acts as threshold size for nps to form as UV barrier. Would you please explain the mechanism of UV-nanoparticle interaction.
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