Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
The 36 checked references that resolve
resolves10.1021/ja3003638Blue-Emissive Upconversion Nanoparticles for Low-Power-Excited Bioimaging in Vivo
resolves10.1039/C2CS35288EEnhancing solar cell efficiency: the search for luminescent materials as spectral converters
resolves10.1039/c3cs60060bLanthanide-doped luminescent nanoprobes: controlled synthesis, optical spectroscopy, and bioapplications
resolves10.1021/ja2043276NIR-Light-Induced Deformation of Cross-Linked Liquid-Crystal Polymers Using Upconversion Nanophosphors
resolves10.1021/nn100457jUltrasmall Monodisperse NaYF<sub>4</sub>:Yb<sup>3+</sup>/Tm<sup>3+</sup> Nanocrystals with Enhanced Near-Infrared to Near-Infrared Upconversion Photoluminescence
resolves10.1002/smll.201200109Fluorescence in Nanobiotechnology: Sophisticated Fluorophores for Novel Applications
resolves10.1038/nature08777Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping
resolves10.1002/adma.201301197Recent Advances in Design and Fabrication of Upconversion Nanoparticles and Their Safe Theranostic Applications
resolves10.1016/j.biomaterials.2011.05.094Core–shell NaYF4:Yb3+,Tm3+@FexOy nanocrystals for dual-modality T2-enhanced magnetic resonance and NIR-to-NIR upconversion luminescent imaging of small-animal lymphatic node
resolves10.1021/cm0713935Controlling the Fluorescence Resonant Energy Transfer by Photonic Crystal Band Gap Engineering
resolves10.1142/S0218625X14500176UPCONVERSION LUMINESCENCE ENHANCEMENT OF <font>NaYF</font><sub>4</sub>:<font>Yb</font><sup>3+</sup>, <font>Er</font><sup>3+</sup> NANOPARTICLES ON INVERSE OPAL SURFACE
resolves10.1039/c3tc30895bEnhancement of the up-conversion luminescence of Yb3+/Er3+ or Yb3+/Tm3+ co-doped NaYF4 nanoparticles by photonic crystals
resolves10.1021/jp206053fEnhancement of Near-Infrared-to-Visible Upconversion Luminescence Using Engineered Plasmonic Gold Surfaces
resolves10.1021/jp105339bNear-Field-Mediated Enhancement of Two-Photon-Induced Fluorescence on Plasmonic Nanostructures
resolves10.1021/nl903046rPlasmon-Enhanced Upconversion in Single NaYF<sub>4</sub>:Yb<sup>3+</sup>/Er<sup>3+</sup> Codoped Nanocrystals
resolves10.1021/nn504993eTip Enhancement of Upconversion Photoluminescence from Rare Earth Ion Doped Nanocrystals
resolves10.1038/nmat3149Tuning upconversion through energy migration in core–shell nanoparticles
resolves10.1021/jp504586tUpconversion Emission Enhancement of NaYF<sub>4</sub>:Yb,Er Nanoparticles by Coupling Silver Nanoparticle Plasmons and Photonic Crystal Effects
resolves10.1021/nn302466rMetal-Enhanced Upconversion Luminescence Tunable through Metal Nanoparticle–Nanophosphor Separation
resolves10.1007/s00339-011-6370-8Photonic band gap and upconversion emission properties of Yb, Er co-doped lead lanthanum titanate inverse opal photonic crystals
resolves10.1021/la802343fSynthesis of Hexagonal-Phase Core−Shell NaYF<sub>4</sub> Nanocrystals with Tunable Upconversion Fluorescence
resolves10.1002/chem.200900861Shape, Size, and Phase‐Controlled Rare‐Earth Fluoride Nanocrystals with Optical Up‐Conversion Properties
resolves10.1063/1.2795997Z-scan theory of two-photon absorption saturation and experimental evidence
resolves10.1364/OL.27.001285Absorption and subsequent emission saturation of two-photon excited materials: theory and experiment
resolves10.1063/1.123090Surface electromagnetic wave excitation on one-dimensional photonic band-gap arrays
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