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| 1 | Multiband emission from single β-NaYF_(4)(Yb,Er) nanoparticles at high excitation power densities and comparison to ensemble studies显示文摘Ensemble and single particle studies of the excitation power density (P)-dependent upconversion luminescence (UCL) of core and core-shell β-NaYF_(4):Yb,Er upconversion nanoparticles (UCNPs) doped with 20% Yb^(3+) and 1% or 3% Er^(^(3+)) performed over a P regime of 6 orders of magnitude reveal an increasing contribution of the emission from high energy Er^(3+) levels at P > 1 kW/cm^(2). This changes the overall emission color from initially green over yellow to white. While initially the green and with increasing P the red emission dominate in ensemble measurements at P < 1 kW/cm^(2), the increasing population of higher Er^(^(3+)) energy levels by multiphotonic processes at higher P in single particle studies results in a multitude of emission bands in the ultraviolet/visible/near infrared (UV/vis/NIR) accompanied by a decreased contribution of the red luminescence. Based upon a thorough analysis of the P-dependence of UCL, the emission bands activated at high P were grouped and assigned to 2–3, 3–4, and 4 photonic processes involving energy transfer (ET), excited-state absorption (ESA), cross-relaxation (CR), back energy transfer (BET), and non-radiative relaxation processes (nRP). This underlines the P-tunability of UCNP brightness and color and highlights the potential of P-dependent measurements for mechanistic studies required to manifest the population pathways of the different Er^(3+) levels. | Florian Frenzel Christian Würth Oleksii Dukhno Frédéric Przybilla Lisa MWiesholler Verena Muhr Thomas Hirsch Yves Mély Ute Resch-Genger | 2021 | Nano Research2021，14，11： | 3 |
| 2 | NMR study of cyclodextrin inclusion of fluorocarbon surfactants in solution显示文摘 | GUO W FUNG B M CHRISTIAN S D | 1992 | Langmuir1992，8，2： | 1 |
| 3 | Peptidotri- azoles on solid phase : -Triazoles by regiospecific copper(I) -catalyzed 1,3-dipolar cycloadditions of termi- nal alkynes to azides 显示文摘 | TomOe Christian W Christensen C Meldal M | 2002 | J Org Chem2002，67，： | 1 |
| 4 | Oat germiuation characteristics differ among genotypes,seed sizes and osmotic potentials显示文摘 | CHRISTIAN J W JEFFERY C W ARON K M | 2005 | Crop Science2005，45，： | 1 |
| 5 | Influence of agr on fibrinogen binding in Staphylococcus aureus Newman显示文摘 | Christiane W Damien M Timothy J | 1996 | Infect Immun1996，64，8： | 1 |
| 6 | Acombined system of lagoon and constructed wetland for an effective wastewater treatment显示文摘 | Christian R S Sabine W and Arnutf M | 2003 | Water Research2003，37，9： | 1 |
| 7 | A new approach to crystal- lographic orientation measurement for apatite fission track analysis, Effects of crystal morphology and implications for automation显示文摘 | Peternell M Kotdmann Fabian Wilson C J L Seiler Christian Gleadow A J W | 2009 | Chemical Geology2009，265，： | 1 |
| 8 | Sorafenib in radioactive iodine-refractory, locally advanced or metastatic differentiated thyroid cancer: a randomised, double-blind, phase 3 trial显示文摘 | Marcia S Brose Christopher M Nutting Barbara Jarzab Rossella Elisei Salvatore Siena Lars Bastholt Christelle de la Fouchardiere Furio Pacini Ralf Paschke Young Kee Shong Steven I Sherman Johannes W A Smit John Chung Christian Kappeler Carol Pe?a István Mo | 2014 | The Lancet2014，，： | 1 |
| 9 | Deformation twinning显示文摘 | Christian J W Mahajan S M | 1995 | Progress in Materials Science1995，39，： | 1 |
| 10 | Magnetic resonance classification of lumbar intervertebral disc degeneration显示文摘 | Christian W A P Alexander M Marco Z | 2001 | Spine2001，26，17： | 1 |
| 11 | Peptidotriazoles on solid phase:[1,2,3]-Triazoles by regiospecific copper (Ⅰ)-catalyzed 1,3-dipolar cycloadditions of terminal alkynes to azides显示文摘 | Christian W T Caspar C Morten M | | 0，，9： | 1 |
| 12 | N-terminal pro-B-type natriuretic peptide,levels for dynamic risk stratification of patients with acute coronary syndromes显示文摘 | Christopher H Christian W Veselin M | 2004 | Circulation2004，110，： | 1 |
| 13 | What do patients know about their heart failure 显示文摘 | Artinian NT Magnan M Christian W | 2002 | Appl Nurs Res2002，15，4： | 1 |
| 14 | An Improved Optimization Algorithm and a Bayes Factor Termination Criterion for Sequential Projection Pursuit显示文摘 | Bobbie J M Webb-Robertson Kristin H J Scott D H Christian P Bob W W | 2005 | Chemometrics and Intelligence Laboratory Systems2005，77，12： | 1 |
| 15 | 显示文摘 | Christian S Kulicke W M Christoph H | 2004 | Starch/ Starke2004，56，5： | 1 |
| 16 | Laboratory calibration of the optical transient detector and the lightning imaging sensor显示文摘 | KOSHAK W J STEWART M E CHRISTIAN H J | 2000 | J Arm Oce Tec2000，17，90： | 1 |
| 17 | Lectin- mediated drug targeting : history and applications 显示文摘 | CHRISTIANE B CLAUS M I JOHN F W | 2004 | Advanced Drug Delivery Reviews2004，56，3： | 1 |
| 18 | Research advances and challenges in the microbiology of enhanced biological phosphorus removal-A critical review 显示文摘 | Gebremariam S Y Beutel M W Christian D | 2011 | Water Environment Research2011，83，3： | 1 |
| 19 | Compact holographic storage demonstrator with rapid access显示文摘 | Michael M Christian W Pletcher D | 1996 | Appl Opt1996，3，14： | 1 |
| 20 | The Top level Global Research System, 1997-1999: Centers, Net works and Nodality: An Analysis Based on Bibliomet ric Indicators显示文摘 | CHRISTIAN W M ANNETTE W S | 2002 | Urban Studies2002，39，56： | 1 |
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