Check out the latest publication about the surface modifications of upconversion nanoparticles using polyelectrolyte multilayers and how we aim to prevent the nanoparticle disintegration in aqueous environments.
Palo, E., Salomäki, M., and Lastusaari, M., “Restraining fluoride loss from NaYF4:Yb3+,Er3+ upconverting nanoparticles in aqueous environments using crosslinked poly(acrylic acid)/poly(allylamine hydrochloride) multilayers” J Colloid Interface Sci. 538 (2019) 320-326.
Read online: http://dx.doi.org/10.1016/j.jcis.2018.11.094