Check out our new publication about up-converting thin films and their properties by atomic layer deposition. The work is done in collaboration with Aalto university.

Tuomisto, M., Giedraityte, Z., Karppinen, M., and Lastusaari, M. “Photon up-converting (Yb,Er)₂O₃ thin films by atomic layer deposition”, Phys. Status Solidi-R 11 (2017) e201700076.
Read online: http://dx.doi.org/10.1002/pssr.201700076

Check out a new publication about molybdenum(VI) complexes and their catalytic activity.

Hossain, M.K., Haukka, M., Sillanpää, R., Hrovat, D.A., Richmond, M.G., Nordlander, E., and Lehtonen, A. “Syntheses and catalytic oxotransfer activities of oxo molybdenum(VI) complexes of a new aminoalcohol phenolate ligand”, Dalton Trans. 46 (2017) 7051-7060.
Read online: http://dx.doi.org/ 10.1039/C7DT00846E

Our latest publication enlightens an alternative route to prepare white emitting phophors by using Li-Hackmanites as a host material. Moreover, the long lasting persistent luminecence can be obtained without heavy metals.

Check out the publication in Advanced Functional Materials below and congratulations to Isabella, José and Mika for their hard work that really paid off!

Norrbo, I., Carvalho, J.M., Laukkanen, P., Mäkelä, J., Mamedov, F., Peurla, M., Helminen, H., Pihlasalo, S., Härmä, H., Sinkkonen, J., and Lastusaari, M. “Lanthanide and Heavy Metal Free Long White Persistent Luminescence from Ti Doped Li-Hackmanite: A Versatile, Low-Cost Material”, Adv. Funct. Mater. 27 (2017) 1606547.
Read online: http://dx.doi.org/10.1002/adfm.201606547

Check out a new collaboration publication about the structural properties of phosphate glasses.

Lopez-Iscoa, P., Salminen, T., Hakkarainen, T., Petit, L., Janner, D., Boetti, N.G., Lastusaari, M., Pugliese, D., Paturi, P., and Milanese, D. “Effect of Partial Crystallization on the Structural and Luminescence Properties of Er³⁺-Doped Phosphate Glasses”, Materials 10 (2017) 473.
Read online: http://dx.doi.org/10.3390/ma10050473

We’re participating in the ongoing buildup of Finnish-Estonian beamline at the MAX IV Laboratory. Check out this new publication about the wide-range beamline and its properties.

Pärnä, R., Sankari, R., Kukk, E., Nõmmiste, E., Valde, M., Lastusaari, M., Kooser, K., Kokko, K., Hirsimäki, M., Urpelainen, S., Turunen, P., Kivimäki, A., Pankratov, V., Reisberg, L., Hennies, F., Tarawneh, H, Nyholm, R., and Huttula, M., “FinEstBeaMS – A wide-range Finnish-Estonian Beamline for Materials Science at the 1.5 GeV storage ring at the MAX IV Laboratory”, Nucl. Instrum. Meth. A 859 (2017) 83-89.
Read online: http://dx.doi.org/10.1016/j.nima.2017.04.002

Check out these two new publications from Iko dealing with the upconversion luminescence properties. One concerning excitation power effects and temperature sensing and the other about red upconversion emission pathways. Congrats, Iko!

Hyppänen, I., Perälä, N., Arppe, R., Schäferling, M., and Soukka T., “Environmental and Excitation Power Effects on the Ratiometric Upconversion Luminescence Based Temperature Sensing Using Nanocrystalline NaYF₄:Yb³⁺,Er³⁺“, ChemPhysChem 18 (2017) 692-701.
Read online: http://dx.doi.org/10.1002/cphc.201601355

Hyppänen, I., Höysniemi, N., Arppe, R., Schäferling, M., and Soukka, T., “Enviromental Impact on the Excitation Path of the Red Upconversion Emission of Nanocrystalline NaYF₄:Yb³⁺,Er³⁺“, J. Phys. Chem. C 121 (2017) 6924−6929.
Read online: http://dx.doi.org/10.1021/acs.jpcc.7b01019

Check out the new publication from Emilia if you want to know more about the upconversion nanoparticle synthesis.

Palo, E., Tuomisto, M., Hyppänen, I., Swart, H.C., Hölsä, J., Soukka, T., and Lastusaari, M., “Highly uniform up-converting nanoparticles: Why you should control your synthesis even more”, J. Lumin. 185 (2017) 125–131.
Read online: http://dx.doi.org/10.1016/j.jlumin.2016.12.051

Have a look at our latest collaboration publications, from the end of 2016 and the beginning of 2017. One is about Mg doped AlGaN semiconductor crystals and its properties and the other about disintegration of upconverting nanoparticles.

Mäkelä, J., Tuominen, M., Nieminen, T., Yasir, M., Kuzmin, M., Dahl, J., Punkkinen, M., Laukkanen, P., Kokko, K., Osiecki, J., Schulte, K., Lastusaari, M., Huhtinen, H., and Paturi, P., Comparison of Chemical, Electronic, and Optical Properties of Mg-Doped AlGaN, J. Phys. Chem. C 120 (2016) 28591–28597.
Read online: http://dx.doi.org/10.1021/acs.jpcc.6b09248

Lahtinen, S., Lyytikäinen, A., Päkkilä, H., Hömppi, E., Perälä, N., Lastusaari, M., and Soukka, T., Disintegration of Hexagonal NaYF₄:Yb³⁺,Er³⁺ Upconverting Nanoparticles in Aqueous Media: The Role of Fluoride in Solubility Equilibrium, J. Phys. Chem. C 121 (2017) 656-665.
Read online: http://dx.doi.org/10.1021/acs.jpcc.6b09301

We have some new collaboration articles, one about clays as a support material, one about ZnO nanorods and third about biocomposite of bioactiveglass and cellulose. Check them out below!

Jäppinen, L., Jalkanen, T., Sieber, B., Addad, A., Heinonen, M., Kukk, E., Radevici, I., Paturi, P., Peurla, M., Shahbazi, M-A., Santos, H.A., Boukherroub, R., Santos, H., Lastusaari, M., and Salonen, J., Enhanced Photoluminescence in Acetylene-Treated ZnO Nanorods, Nanoscale Res. Lett. (2016) 11:413.
Read online: http://dx.doi.org/10.1186/s11671-016-1627-y

Sobhana SS., L., Mehedi, R, Malmivirta, M., Paturi, P., Lastusaari, M., Dirtu, M. M., Garcia, Y., and Fardim, P., Heteronuclear nanoparticles supported hydrotalcites containing Ni(II) and Fe(III) stable photocatalysts for Orange II degradation, Appl. Clay Sci. 132-133 (2016) 641-649.
Read online: http://dx.doi.org/10.1016/j.clay.2016.08.016

Wang, X., Cheng, F., Liu, J., Smått, J-H., Gepperth, D., Lastusaari, M., Xu, C., and Hupa, L., Biocomposites of copper-containing mesoporous bioactive glass and nanofibrillated cellulose: Biocompatibility and angiogenic promotion in chronic wound healing application, Acta Biomater. 46 (2016) 286-298.
Read online: http://dx.doi.org/10.1016/j.actbio.2016.09.021