Dual Laser Study of Non‐Degenerate Two Wavelength Upconversion Demonstrated in Sensitizer‐Free NaYF4:Pr Nanoparticles

  title={Dual Laser Study of Non‐Degenerate Two Wavelength Upconversion Demonstrated in Sensitizer‐Free NaYF4:Pr Nanoparticles},
  author={Thomas J. Prinse and Afshin Karami and Jillian Elizabeth Moffatt and Thomas Bede Payten and Georgios Tsiminis and Lewis Da Silva Teixeira and Jingxiu Bi and Tak W. Kee and Elizaveta Klantsataya and Christopher J. Sumby and Nigel A. Spooner},
  journal={Advanced Optical Materials},
Understanding the upconversion pathways of a rare‐earth dopant is crucial to furthering the use of that material, either toward applications in imaging or elsewhere. This work outlines a new analysis approach that consists of using two synchronized widely‐tunable laser sources to explore the properties of upconverting materials. By examining sensitizer‐free rare‐earth nanoparticles based on a matrix of hexagonal sodium yttrium tetrafluoride (β‐NaYF4) doped with praseodymium but no ytterbium… 
3 Citations
Frequency Encoding of Upconversion Nanoparticle Emission for Multiplexed Imaging of Spectrally and Spatially Overlapping Lanthanide Ions.
We present frequency encoded upconversion (FE-UPCON) widefield microscopy, an imaging approach that allows for multiplexed signal recovery based on frequency encoding of selected upconverted
The pH responsive upconversion fluorescence and photothermal conversion properties of NaYF4:Yb3+/Er3+@NaYF4@MnO2@Au.
A pH responsive upconversion fluorescence imaging precisely guided photothermal therapy system, namely NaYF 4:Yb3+/Er3+@NaYF4@MnO2@Au nanocomposites, which can effectively avoid light damage to non-target tissues.
A multi-color persistent luminescent phosphor β-NaYF4:RE3+ (RE = Sm, Tb, Dy, Pr) for dynamic anti-counterfeiting
Conventional luminescent materials generally exhibit uni-color and transient emission under UV excitation, which makes them mediocre in the field of anti-counterfeiting. The high-level


Amplified stimulated emission in upconversion nanoparticles for super-resolution nanoscopy
These engineered nanocrystals offer saturation intensity two orders of magnitude lower than those of fluorescent probes currently employed in stimulated emission depletion microscopy, suggesting a new way of alleviating the square-root law that typically limits the resolution that can be practically achieved by such techniques.
Emission color tuning of core/shell upconversion nanoparticles through modulation of laser power or temperature.
The power- and temperature-responsive color shifts of these Ho/Tm co-doped UCNPs are favorable for immediate recognition by the naked eye, but are hard to copy, offering the possibility of designing more secure anti-counterfeiting patterns.
Recent Progress of Rare‐Earth Doped Upconversion Nanoparticles: Synthesis, Optimization, and Applications
The state‐of‐the‐art approaches to synthesize UCNPs in the past few years are introduced, followed by a summary of several strategies to optimize upconversion emissive properties and various applications ofUCNPs.
Spectral properties of Tm3+ doped NaYF4 up-converting nanoparticles under single and double photoexcitation wavelengths.
A newly developed setup for double photoexcitation is presented together with preliminary data of Tm3+ doped NaYF4 nanoparticles with different composition and concentration, which demonstrate different susceptibility of T m3+ luminescence to numerous factors.
Achieving high-efficiency emission depletion nanoscopy by employing cross relaxation in upconversion nanoparticles
An efficient STED mechanism using optimized lanthanide upconversion nanoparticles is developed, enabling cytoskeleton nanoscopic imaging and two-color super-resolution imaging using upconversions using a single pair of excitation/depletion beams.
Simultaneous super-linear excitation-emission and emission depletion allows imaging of upconversion nanoparticles with higher sub-diffraction resolution.
It is demonstrated that the imaging conditions can be chosen in a way that activates both super-resolution regimes simultaneously when imaging NaYF4:Yb,Tm UCNPs, making the uSEE-STED modality appealing for biological applications.
Monodisperse Dual-Functional Upconversion Nanoparticles Enabled Near-Infrared Organolead Halide Perovskite Solar Cells.
This work reports on, for the first time, a viable strategy of capitalizing on judiciously synthesized monodisperse NaYF4 :Yb/Er upconversion nanoparticles (UCNPs) as the mesoporous electrode for CH3 NH3 PbI3 perovskite solar cells to be operative under NIR light.
Depleted upconversion luminescence in NaYF4:Yb3+,Tm3+ nanoparticles via simultaneous two-wavelength excitation.
We report optical depletion of upconversion luminescence (UCL) in NaYF4:Yb3+,Tm3+ nanoparticles excited simultaneously by 980 nm and 1550 nm lasers. The UCL intensity is greatly depleted, while the
Upconversion nanophosphors for small-animal imaging.
In this critical review, recent reports regarding the synthesis of water-soluble UCNPs and their surface modification and bioconjugation chemistry are summarized and the applications ofUCNPs for small-animal imaging, including tumor-targeted imaging, lymphatic imaging, vascular imaging and cell tracking are reviewed in detail.
Photon upconversion in core-shell nanoparticles.
This tutorial review highlights recent advances in the development of upconversion core- shell nanoparticles, with particular emphasis on the emerging strategies for regulating the interplay of dopant interactions through core-shell nanostructural engineering that leads to unprecedented upconverted properties.