Amphiphilic coatings for the protection of upconverting nanoparticles against dissolution in aqueous media

Dalton Transactions : an International Journal of Inorganic Chemistry
Olivija PlohlDarja Lisjak

Abstract

Upconverting nanoparticles (UCNPs) of β-NaYF4, co-doped with Yb3+and Tm3+and 21-36 nm large, were synthesized using a modified thermal decomposition method. The as-synthesized UCNPs were coated with oleic acid and dispersed in nonpolar media. Their morphology, size and crystal structure were analysed with transmission electron microscopy and X-ray diffraction. The UCNPs showed a fluorescence emission spectrum characteristic of Tm3+. Their dissolution in water (pH ∼ 4-5) and phosphate buffered saline (PBS, pH = 7.4) was determined from the fraction of dissolved fluoride ions using a fluoride-ion-selective electrode. The dissolution of bare UCNPs was much more prominent in PBS than in water. Two amphiphilic coatings, poly(maleic anhydride-alt-1-octadecene)-bis(hexamethylene)triamine (PMAO-BHMT) and d-α-tocopheryl polyethylene glycol succinate (TPGS) were tested for their effects on the dissolution of the UCNPs. The coatings were formed directly on the as-synthesized UCNPs as was confirmed with electrokinetic measurements, infrared spectroscopy and thermogravimetric analyses. Both coatings enabled the dispersion of UCNPs in water, and improved the fluorescence emission intensity with respect to the bare UCNPs. However, only the PM...Continue Reading

References

Jun 20, 1996·Chemical Reviews·Abraham Ulman
Dec 18, 2004·Toxicology Letters·Haiqing XiaoZhifang Chai
Feb 21, 2007·Journal of the American Chemical Society·William W YuVicki L Colvin
Aug 5, 2008·Biomaterials·Rufaihah Abdul Jalil, Yong Zhang
Oct 9, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Hai-Sheng Qian, Yong Zhang
Oct 9, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·John-Christopher BoyerFrank C J M van Veggel
Apr 11, 2012·Chemistry : a European Journal·Ye-Fu WangChun-Hua Yan
Apr 14, 2012·Biomaterials·Zhiping ZhangSi-Shen Feng
Jul 4, 2012·Nanoscale·Daniel Jaque, Fiorenzo Vetrone
May 15, 2013·Nanotechnology·Bożena SikoraDanek Elbaum
Sep 2, 2014·Chemical Society Reviews·Anna GnachJohn A Capobianco
Jul 8, 2015·Chemical Reviews·Hao DongChun-Hua Yan
Jul 22, 2016·Environmental Toxicology and Pharmacology·Eleonore Fröhlich
Jul 28, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Darja LisjakMaja Ponikvar-Svet
Aug 3, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Emmanuel RuggieroLuca Salassa
Dec 20, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Olivija PlohlUte Resch-Genger

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Citations

Aug 9, 2018·Chemical Communications : Chem Comm·Ming GuanJiajia Zhou
Dec 21, 2018·Methods and Applications in Fluorescence·Gabrielle A MandlJohn A Capobianco
Jun 18, 2020·ChemistryOpen·Tanmaya JoshiHolger Stephan
Jan 26, 2021·Beilstein Journal of Nanotechnology·Cynthia KembuanChristina Graf
Apr 27, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Maša VozličDarja Lisjak
Jun 15, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Emilia PaloMika Lastusaari

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