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| 1 | Particle-size-dependent upconversion luminescence of NaYF4:Yb,Er nanoparticles in organic solvents and water at different excitation power densities显示文摘A systematic study of the luminescence properties of monodisperse β-NaYF4: 20%Yb^3+,2%Er^3+ upconversion nanoparticles (UCNPs)with sizes ranging from 12--43nm is presented utilizing steady-state and time-resolved fluorometry. Special emphasis was dedicated to the absolute quantification of size-and environment-induced quenching of upconversion luminescence (UCL)by highenergy O-H and C-H vibrations from solvent and ligand molecules at different excitation power densities (P).In this context,the still-debated population pathways of the 4F9/2 energy level of Er^3+ were examined.Our results highlight the potential of particle size and P value for color tuning based on the pronounced near-infrared emission of 12nm UCNPs,which outweighs the red Er^3+emission under 'strongly quenched'conditions and accounts for over 50% of total UCL in water.Because current rate equation models do not include such emissions,the suitability of these models for accurately simulating all (de)population pathways of small UCNPs must be critically assessed.Furthermore,we postulate population pathways for the 4F9/2energy level of Er3.,Which correlate with the size-,environment-,and P-dependent quenching states of the higher Er^3+ energy levels. | Marco Kraft Christian Würth Verena Muhr Thomas Hirsch Ute Resch-Genger | 2018 | Nano Research2018，11，12： | 8 |
| 2 | 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 |
| 3 | 卒中介入治疗培训指南:国际多学会共识文件显示文摘1背景
缺血性卒中是全球人口死亡和残疾的首要原因。很多急性大血管闭塞(emergent large vesselocclusion,ELVO)患者都会遗留长期残疾。事实上,这些颅内大动脉闭塞经常会导致大面积脑损伤,进而造成患者死亡或严重致残。 | Lavine SD Cockroft K Hoh B Bambakidis N Khalessi AA Woo H Riina H Siddiqui A Hirsch JA Chong W Rice H Wenderoth J Mitchell P Coulthard A Signh TJ Phatorous C Khangure M Klurfan P ter Brugge K Iancu D Gunnarsson T Pongpech S Rodesch G Soderman M Taylor A Krings T Orbach D Picard L Suh DC Zheng HQ Jansen O Muto M Szikora I Pierot L Brouwer P Gralla J Renowden S Andersson T Fiehler J Turjman F White P Januel AC Spelle L Kulcsar Z Chapot R Biondi A Dima S Taschner C Szajner M Krajina A Sakai N Matsumaru Y Yoshknura S Ezura M Fujinaka T Iihara K Ishii A Higashi T Hirohata M Hyodo A Ito Y Kawanishi M Kiyosue H Kobayashi E Kobayashi S Kuwayama N Matsumoto Y Miyachi S Murayama Y Nagata I Nakahara I Nemoto S Niimi Y Oishi H Satomi J Satow T Sugiu K Tanaka M Terada T Yamagami H Diaz O Lylyk P Jayaraman MV Patsalides A Gandhi CD Lee SK Abruzzo T Albani B Ansari SA Arthur AS Baxter BW Bulsara KR Chen M Almandoz JE Fraser JF Heck DV Hetts SW Hussain MS Klucznik RP Leslie-Mawzi TM Mack WJ McTaggart RA Meyers PM Mocco J Prestigiacomo CA Pride GL Rasmussen PA Starke RM Sunenshine PJ Tarr RW Frei DF Pabo M Nogueira RG Zaidat OO Jovin T Linfante I Yavagal D Liebeskind D Novakovic R Pongpech S 许岩 孙瑞 郭芮兵 | 2017 | 国际脑血管病杂志2017，25，5： | 2 |
| 4 | Systems of differential equations which are competitive or cooperative V: Convergence in 3- dimensional systems 显示文摘 | Hirsch M W | 1989 | Journal Differential Equations1989，80，1： | 1 |
| 5 | Amino acid sequence determinants of beta-lactamase structure and activity 显示文摘 | Huang W Petrosino J Hirsch M | 1996 | J Mol Biol1996，258，4： | 1 |
| 6 | Molecular signals and receptors: controlling rhizosphere interactions between plants and other organisms显示文摘 | Hirsch A M Bauer W D Bird D M | 2003 | Ecology2003，84，： | 1 |
| 7 | Chain trainsitivity, attractivity,and strong repellors for semidynamical systems显示文摘 | Hirsch M W Smith H L Zhao X Q | 2001 | J Dynam Diff Eq2001，13，： | 1 |
| 8 | Acquired hemophilia A in the United Kingdom: a 2-year national surveillance study by the United Kingdom Haemophilia Centre Doctors' Organisation显示文摘 | COLLINS P W HIRSCH S BAGLIN T P | 2007 | Blood2007，109，5： | 1 |
| 9 | Acute ischemic syndromes following coronary artery bypass graft surgery显示文摘 | LEDLEY G S KOTLER M N | 1998 | Clin Cardiol1998，21，9： | 1 |
| 10 | Systems of differential equations which are competitive or cooperative IV: Structural stability in three-dimensional systems显示文摘 | Hirsch M W | 1990 | SIAM Journal of Mathematical Analysis1990，21，5： | 1 |
| 11 | Prospective study of polyomavirus type BK replication and nephropathy in renal-transplant recipients显示文摘 | HIRSCH H H KNOWLES W DICKENMANN M | 2002 | N Engl J Med2002，347，7： | 1 |
| 12 | The dynamical systems approach to differential equations 显示文摘 | HIRSCH M W | 1984 | Bull Amer Math Soc1984，11，1： | 1 |
| 13 | Transmyocardial Laser Revascularization Does not Denervate the Canine Heart显示文摘 | HIRSCH G M THOMPSON G W ARORA R C | 1999 | Ann Thorac Surg1999，68，： | 1 |
| 14 | Particle growth in copoly-merization of self-emulsifying,unsaturated polyesters and styrene显示文摘 | Flammer U Hirsch M Funk W | 1994 | Macromol Rapid Commun1994，15，： | 1 |
| 15 | Atopic dermatitis,extrinsic atopie dermatitis and the hygiene hypothesis: results from a crosssectional study显示文摘 | Zutavern A Hirsch T Leupold W | 2005 | Clin Exp Allergy2005，35，10： | 1 |
| 16 | KRAS mutations and sensitivity to epidermal growth factor receptor inhibitors in colorectal cancer: practical application of patient selection显示文摘 | JIMENO A MESSERSMITH W A HIRSCH F R | 2009 | J C/in Oncol2009，27，7： | 1 |
| 17 | Prospective study of polyomavirus type BK replication and nephropathy in renal-transplant recipients显示文摘 | Hirsch HH Knowles W Dickenmann M | 2002 | N Engl J Med2002，347，7： | 1 |
| 18 | High-resolution esophageal pressure topography is superior to conventional sleeve manometry for the detection of transient lower esophageal sphincter relaxations asso- ciated with a reflux event 显示文摘 | Rohof W Boeckxstaens GE Hirsch DP | 2011 | Neurogastmenterol Motil2011，23，5： | 1 |
| 19 | Computed tomography angiography with three - dimensional reconstruction for pulmony venous definition in high - risk infants with congenital heart disease显示文摘 | HIRSCH R GOTTLIEBSON W CROTTY E | 2006 | Congenit Heart Dis2006，1，3： | 1 |
| 20 | Psychrophilic myxobaeteria from antarctic soils显示文摘 | Dawid W Gillikowski C A Hirsch P | 1988 | Polarforsehung1988，58，23： | 1 |
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