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| 1 | Explaining the influence of dopant concentration and excitation power density on the luminescence and brightness of β-NaYF4:Yb^3+,Er^3+ nanoparticles:Measurements and simulations显示文摘We assessed the influence of Yb^3+ and Er34 dopant concentration on the relative spectral distribution, quantum yield (Фuc), and decay kinetics of the upconversion luminescence (UCL) and particle brightness (BUC) for similarly sized (33 nm) oleate-capped p-NaYF4:Yb3t,Er^3+ upconversion (UC) nanoparticles (UCNPs) in toluene at broadly varied excitation power densities (F). This included an Yb^3+ series where the Yb^3+ concentration was varied between 11%—21% for a constant Er^3+ concentration of 3%, and an Er^3+ series, where the Er^3+ concentration was varied between 1%-4% for a constant Yb^3+ concentration of 14%. The results were fitted with a coupled rate equation model utilizing the UCL data and decay kinetics of the green and red Er34 emission and the Yb34 luminescence at 980 nm. An increasing Yb34 concentration favors a pronounced triphotonic population of 4F9/2 at high P by an enhanced back energy transfer (BET) from the 4G11/2 level. Simultaneously, the Yb^3+-controlled UCNPs absorption cross section overcompensates for the reduction in Фuc with increasing Yb^3+ concentration at high P, resulting in an increase in Sue. Additionally, our results show that an increase in Yb34 and a decrease in Er^3+ concentration enhance the color tuning range by P. These findings will pave the road to a deeper understanding of the energy transfer processes and their contribution to efficient UCL, as well as still debated trends in green-to-red intensity ratios of UCNPs at different P. | Martin Kaiser Christian Wurth Marco Kraft Tero Soukka Ute Resch-Genger | 2019 | Nano Research2019，12，8： | 3 |
| 2 | Meconium stimulates neutrophil oxidative burst显示文摘 | Soukka HR Ahotupa M Ruutu M | 2002 | Am J Perinatol2002，19，5： | 1 |
| 3 | Regulation of CD44v6 -containing isoforms during proliferation of normal and maligant epithelial cell显示文摘 | Soukka T Salmi M Joensun H | 1997 | Cancer Res1997，57，11： | 1 |
| 4 | Meconium induces only local inflammatory lung injury in piglets 显示文摘 | Korhonen K Soukka H Halkola L | 2003 | Pediatr Research2003，54，2： | 1 |
| 5 | Salivary lysozyme lactoferrin and peroxidases:antibacterial effects on cariogenic bacteria and clinical applications in preventive dentistry显示文摘 | Tenovou J Lumikari M Soukka T | 1991 | Proceedings of the Finnish Dental Society1991，87，： | 1 |
| 6 | Methylprednisolone attenuates the pulmonary hypertensive response in porcine meeonium aspiration 显示文摘 | Soukka H Halkola L Aho H Routanen M Kero P Kaapa P | 1997 | Pediatr Res1997，42，2： | 1 |
| 7 | Regulation of CD44v6-containing isoforms during proliferation of normal and malignant epithelial cells显示文摘 | Salmi M Joesuu H | 1997 | Cancer Res1997，57，11： | 1 |
| 8 | Inhaled nitric oxide treatment inhibits neuronal injury after meconium aspiration in piglets显示文摘 | Aaltonen M Soukka H Halkola L | 2007 | Early Hum Dev2007，83，2： | 1 |
| 9 | Europium nanoparticles and time- resolved fluorescence for uhrasensitive detection of prostate-specific antigen 显示文摘 | Harma H Soukka T Lovgren T | 2001 | Clinical Chemistry2001，47，3： | 1 |
| 10 | Pulmonary inflammatory mediators after sevoflurane and thiopentone anaest hesia in pigs显示文摘 | Takala RS Soukka HR Salo MS | 2004 | Acta Anaesthesiol Scand2004，48，： | 1 |
| 11 | Meconium induce only local inflammatory lung injury in piglets显示文摘 | Korhonen K Soukka H Halkola L | 2003 | Pediatr Res2003，54，2： | 1 |
| 12 | Europium nanoparticles and time-resolved fluorescence for ultrasensitive detection of prostatespecific antigen显示文摘 | H(A)RM(A) H SOUKKA T L(O)VGREN T | 2001 | Clinical Chemistry2001，47，3： | 1 |
| 13 | Phospholipase A2 in meconium-induced lung injury显示文摘 | Kaapa P Soukka H | 2008 | J Perinatol2008，28，3： | 1 |
| 14 | Meconium induce only local inflammatory lung injury in piglets 显示文摘 | Korhonen K Soukka H Halkola L | 2003 | Pediatr Res2003，54，2： | 1 |
| 15 | Zeptomole detection sensitivity of prostate-specific antigen in a rapid microtitre plate assay using time-resolved fluorescence 显示文摘 | HARMA H SOUKKA T LONNBERG S | 2000 | Luminescence2000，，15： | 1 |
| 16 | Inhaled nitric oxide treatment inhibits neuronal injury after meconium aspiration in piglets显示文摘 | Aaltonen M Soukka H Halkola L | 2007 | Early Hum Dev2007，83，2： | 1 |
| 17 | Homogeneous duplex polymerase chain reaction assay using switchable lanthanide fluorescence probes显示文摘 | Ari Lehmusvuori Antti-Heikki Tapio Petra M?ki-Teeri Kaisu Rantakokko-Jalava Qi Wang Harri Takalo Tero Soukka | 2013 | Analytical Biochemistry2013，，： | 1 |
| 18 | Meeonium induce only local inflammatory lung injury in piglets显示文摘 | Korhonen K Soukka H Halkola L | 2003 | Pedialr Res2003，54，2： | 1 |
| 19 | Miniature single-particle immunoassay for PSA in serum using recombinant Fab fragments显示文摘 | Harma H Tarkkinen P Soukka T | 2000 | Clin Chem2000，46，： | 1 |
| 20 | Regulation of CD44V6-containing isoforms during proliferation of nomal and malignant epithelial cells 显示文摘 | Soukka T Salmi M Joensuu H | 1997 | Cancer Res1997，570，250： | 1 |
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