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| 1 | Electronic structure of the SrAl_2O_4:Eu^(2+) persistent luminescence material显示文摘The electronic structure of the strontium aluminate (SrAl2O4:Eu2+) materials was studied with a combined experimental and theoretical approach. The UV-VUV synchrotron radiation was applied in the experimental study while the electronic structure of the non-optimized and optimized crystal structure were investigated theoretically by using the density functional theory. The structure of the va- lence and conduction bands as well as the band gap energy of the material together with the position of the Eu2+ 4f7 8S7/2 ground state were calculated. The calculated band gap energy (6.4 eV) agreed well with the experimental value of 6.6 eV. The valence band consisted mainly of oxygen states whereas the bottom of the conduction band of strontium states. In agreement with the experimental results, the calculated 4f7 8S7/2 ground state of Eu2+ lies in the energy gap of the host. The position of the 4f7 ground state depended on the Coulomb repulsion strength. The position of the 4f7 ground state with respect to the valence and conduction bands was discussed using theoretical and experimental evidence available. | Jorma Hls Taneli Laamanen Mika Lastusaari Janne Niittykoski Pavel Novák | 2009 | Journal of Rare Earths2009，27，4： | 9 |
| 2 | Synchrotron radiation investigations of the Sr_2MgSi_2O_7:Eu^(2+),R^(3+) persistent luminescence materials显示文摘The electronic and defect energy level structure of polycrystalline Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials were studied with thermoluminescence and different synchrotron radiation spectroscopies (UV-VUV emission and excitation, X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption fine structure (EXAFS)). Special attention was paid on the effect of the R3+ co-dopants on the persistent luminescence properties of the materials. Theoretical calculations using the density functional theory (DFT) were carried out simultaneously with the experimental work. The experimental band gap energy (Eg) value of ca. 7.1 eV agreed very well with the DFT value of 6.7 eV. The variation of the Eg value was attempted to relate with the trap structure as well as with the different properties of the R3+ co-dopants. The trap level energy distribution depended strongly on the R3+ co-dopant except for the shallowest trap energy above the room temperature remaining practically the same, however. The different processes in the mechanism of persistent luminescence from Sr2MgSi2O7:Eu2+,R3+ were assembled and their contributions discussed. | Tuomas Aitasalo Jukka Hassinen Jorma Hls Taneli Laamanen Mika Lastusaari Marja Malkamki Janne Niittykoski Pavel Novák | 2009 | Journal of Rare Earths2009，27，4： | 5 |
| 3 | Long-term postoperative cognitive dysfunction in the elderly: ISPOCD1 study显示文摘 | JT Moller P Cluitmans LS Rasmussen P Houx H Rasmussen J Canet P Rabbitt J Jolles K Larsen CD Hanning O Langeron T Johnson PM Lauven PA Kristensen A Biedler H van Beem O Fraidakis JH Silverstein JEW Beneken JS Gravenstein | 1998 | The Lancet . 1998 (9106)1998，，9106： | 2 |
| 4 | Defect aggregates in the Sr_2MgSi_2O_7 persistent luminescence material显示文摘The crystal and electronic structure of the Eu2+ doped and defect containing Sr2MgSi2O7 persistent luminescence material were studied using the density functional theory(DFT) .The defects may act as energy storage or even luminescence quenching centres in these materials,however their role is very difficult to confirm experimentally.The probability of vacancy formation was studied using the total en-ergy of the defect containing host.Significant structural modifications in the environment of the isolated defects,especially the strontium va-cancy,as well as defect aggregates were found.The experimental band gap energy of Sr2MgSi2O7 was well reproduced by the calculations.The defect induced electron traps close to the host's conduction band were found to act as energy storage sites contributing to its efficient per-sistent luminescence.The interactions between the defects were found to modify both the Eu2+ 4f7 ground state energy as well as the trap structure.The effect of charge compensation induced by the rare earth co-doping on the defect structure and energy storage properties of the persistent luminescence materials was discussed. | Jorma Hls Taneli Laamanen Mika Lastusaari Pavel Novák | 2011 | Journal of Rare Earths2011，29，12： | 2 |
| 5 | Glutamine dipeptide-supplemented parenteral nutrition maintains in testinal function in the critically ill显示文摘 | Tremel H Kienle B Weilemann LS | 1994 | Gastroenterology1994，107，12： | 1 |
| 6 | Do blood concentrations of neurone specific enolase and S-100 beta protein reflect cognitive dysfunction after abdominal surgery显示文摘 | Rasrnussen LS Christiansen M Rasmussen H | 2000 | Br J Anaesth2000，84，2： | 1 |
| 7 | RhoA and RhoC proteins promote both cell proliferation and cell invasion of human oesophageal squamous cell carcinoma cell lines in vitro and in vivo显示文摘 | Faried A Faried LS Kimura H etal | 2006 | Eur J Cancer2006，42，10： | 1 |
| 8 | An NB-LRR protein required for HR signalling mediated by both extra-and intracellular resistance proteins显示文摘 | Gabrils S H E J Vossen J H Ekengren S K Ooijen G Abd-El-Haliem A M Berg G Rainey D Y Martin G B Takken F L W Wit P J G M | 2007 | The Plant Journal2007，50，1： | 1 |
| 9 | Benzodiaz- epines and postoperative cognitive dysfunction in the elderly 显示文摘 | Rasmussen LS Steentoft A Rasmussen H | 1999 | Br J Anaesth1999，83，4： | 1 |
| 10 | Vitamin D deficiency does not predict progression of coronary artery calcium,carotid intima-media thickness or high-sensitivity C-reactive protein in systemic lupus erythematosus显示文摘 | Kiani AN Fang H Magder LS Petri M | 2013 | Rheumatology(Oxford)2013，52，11： | 1 |
| 11 | Systematic qualitative and quantitative assessment of fatty acids in the seeds of 60 tree peony(Paeonia section Moutan)cultivars by GC-MS显示文摘 | Li SS Yuan RY Chen LG Wang LS Hao XH Wang LJ Zheng XC Du H | 2015 | Food Chem2015，173，15： | 1 |
| 12 | New insights in- to thepathophysiology of postoperative cognitive dysfunction 显示文摘 | KRENK L RASMUSSEN LS KEHLET H | 2010 | ActaAnaesthesiol Scand2010，54，8： | 1 |
| 13 | Aspirin, NSAIDs, and colorectal cancer: possible involvement in an insulin-related pathway显示文摘 | Martha LS Wade S Michael H | 2004 | Cancer Epidemiology Biomarkers & Prevention2004，13，4： | 1 |
| 14 | Efficacy and adverse effects of cholinesterase inhibitors and memantine in vascular dementia:a meta-analysis of randomised controlled trials 显示文摘 | Kavirajan H Schneider LS | 2007 | Lancet Neural2007，6，9： | 1 |
| 15 | Differences between Male and Female Systemic Lupus Erythematosus in a Multiethnic 显示文摘 | Tan TC Fang H Mager LS | 2012 | J Rheumatol2012，39，4： | 1 |
| 16 | Stable fixation of intertrochantaric fractures 显示文摘 | Kaufer H Matthews LS Sonstegard D | 1974 | Bone Joint Surg Am1974，56，5： | 1 |
| 17 | Efficacy and adverse effects of cholinesterase inhibitors and memantine in vascular dementia: a meta analysis of randomized controlled trials显示文摘 | Kavi an H Schneider LS | 2007 | Lancet Neurol2007，6，： | 1 |
| 18 | Properties of starch noodles as affected by sweet potato starch 显示文摘 | Collado LS Corke H | 1997 | Cereal Chemistry1997，74，2： | 1 |
| 19 | The need for long-term treatment in the mouse lymphoma assay显示文摘 | Honma M Zhang LS Sakamoto H | 1999 | Mutagenesis1999，14，1： | 1 |
| 20 | Efficacy and adverse effects ofcholinesterase inhibitors and memantine in vascular dementia:ameta analysis of randomized controlled trials显示文摘 | Kavian H Schneider LS | 2007 | Lancet Neurol2007，6，9： | 1 |
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