dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Meijerink, A. | |
dc.contributor.author | Zhang, A. | |
dc.date.accessioned | 2020-02-20T19:04:03Z | |
dc.date.available | 2020-02-20T19:04:03Z | |
dc.date.issued | 2019 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/34898 | |
dc.description.abstract | Visible-to-UVB upconversion (UC) is a promising technique to treat skin diseases such as Psoriasis. In recent works, the lanthanide Ho3+-Gd3+ couple doped in the NaYF4 host lattice resulted in successful blue-to-UVB UC emission from the Gd3+ (6P7/2) state. This can be used in a topical carrier to treat skin diseases resulting in cost-effective and time-efficient treatment. An alternative host lattice: Y2O3 (yttria) was tested in this work using the Ho3+-Gd3+ and Er3+-Gd3+ blue-to-UVB UC dopant couples. Yttria is known for its excellent thermal and chemical stability. For both lanthanide couples, microcrystalline doped yttria were successfully synthesized and blue-to-UVB UC was realized. Blue-to-UVB UC was furthermore achieved in the Ho3+-Gd3+ doped yttria nanocrystals. It was found that the efficiency of the blue-to-UVB UC of the yttria particles decreases significantly when the particles size is reduced to nanocrystalline. The presented work is the first to realize Ho3+-Gd3+ doped Y2O3 (450 nm) blue-to-UVB (313 nm) upconverting nanoparticles. Further research may help to enhance the UC efficiency. | |
dc.description.sponsorship | Utrecht University | |
dc.language.iso | en | |
dc.title | Upconverting Lanthanide-doped Y2O3 Nanoparticles for Phototherapy | |
dc.type.content | Master Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | Upconversion, Lanthanide, Y2O3, Holmium, Gadolinium, Erbium | |
dc.subject.courseuu | Nanomaterials Science | |