11 Singapore-MIT Alliance in Research and Technology, Antimicrobial Resistance Interdisciplinary Research Group, Singapore, Singapore. 10 Department of Infectious Diseases, Singapore General Hospital, Singapore, Singapore. 9 Viral Research & Experimental Medicine Center, SingHealth/Duke-NUS (ViREMiCS), Singapore, Singapore. 8 Emerging Infectious Diseases Program, Duke-NUS Medical School, Singapore, Singapore.2 Emerging Infectious Diseases Program, Duke-NUS Medical School, Singapore, Singapore. 1 Emerging Infectious Diseases Program, Duke-NUS Medical School, Singapore, Singapore. 15 Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore. 14 Singapore-MIT Alliance in Research and Technology, Antimicrobial Resistance Interdisciplinary Research Group, Singapore, Singapore. 13 Viral Research & Experimental Medicine Center, SingHealth/Duke-NUS (ViREMiCS), Singapore, Singapore. 12 Emerging Infectious Diseases Program, Duke-NUS Medical School, Singapore, Singapore. 7 KK Research Centre, KK Women's and Children's Hospital, Singapore, Singapore.
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6 Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.5 Singapore-MIT Alliance in Research and Technology, Antimicrobial Resistance Interdisciplinary Research Group, Singapore, Singapore.4 Department of Infectious Diseases, Singapore General Hospital, Singapore, Singapore.3 Viral Research & Experimental Medicine Center, SingHealth/Duke-NUS (ViREMiCS), Singapore, Singapore.1 Emerging Infectious Diseases Program, Duke-NUS Medical School, Singapore, Singapore.
![nus er nus er](https://i.ytimg.com/vi/Dp2d8OcSLZo/maxresdefault.jpg)
This is a fundamental new pathway to mitigate the concentration quenching effect, thus offering a convenient method for red-emitting upconversion nanoprobes for biological applications.Įr3+ sensitizers energy migration optical imaging transient energy trapping upconversion nanocrystals. This endows the resultant nanoparticles with bright red (about 700-fold enhancement) and near-infrared luminescence that is achievable under multiple excitation wavelengths. Importantly, an appropriate doping of Tm 3+ has been demonstrated to further enhance upconversion luminescence through energy trapping.
#Nus er Activator#
Unlike the conventional Yb 3+ -Er 3+ system, the Er 3+ ion can serve as both the sensitizer and activator to enable an effective upconversion process. In erbium-enriched core-shell NaErF 4 :Tm (0.5 mol 4 nanoparticles, a high degree of energy migration between Er 3+ ions occurs to suppress the effect of concentration quenching upon surface coating. A new class of lanthanide-doped upconversion nanoparticles are presented that are without Yb 3+ or Nd 3+ sensitizers in the host lattice.