I have read some interesting facts related to nanomaterial uses in cosmetics. Nanoparticles made from titanium dioxide and/or zinc oxide are to be used as UV filters in sun creams to protect the skin from UV radiation, for example. Nanotechnologically manufactured materials (so-called biocomposites) in toothpaste are intended to promote the natural tooth repair mechanism of saliva. Nanocapsules in skincare products are intended to ensure protection and the transport of active ingredients and improve the care effect. Research is being conducted into the improvement of the physical properties (e.g. transparency) of finished cosmetic products by means of nanomaterials.
Raj, Silpa, Shoma Jose, U. S. Sumod, and Mangalathillam Sabitha. "Nanotechnology in cosmetics: Opportunities and challenges." Journal of pharmacy & bioallied sciences 4, no. 3 (2012): 186.
Referred following reputed research article
Nanomaterials and regulation of cosmetics
https://www.nature.com/articles/nnano.2010.12/
This is a good question and very good follow-up responses. Nano-structured materials (i.e. Ag2O) have dynamic physicochemical properties. Their interaction with EMR creates oscillations on their crystal facets, commonly known as surface plasmon resonance (SPR). Their ability to operate in nano-sized environments translates to a higher surface/volume ratio for each particle. Silver-based NPs are known to be bacteriostatic and considerably non-toxic. This deems them a safe solution to mitigating the formation of bacterial colonies & skincare.
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