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 117 checked references that resolve
resolves10.1038/nature21366Amplified stimulated emission in upconversion nanoparticles for super-resolution nanoscopy
resolves10.1038/nature08777Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping
resolves10.1039/C4CS00205ACombinatorial approaches for developing upconverting nanomaterials: high-throughput screening, modeling, and applications
resolves10.1039/C4CS00168KExcitation energy migration dynamics in upconversion nanomaterials
resolves10.3762/bjnano.8.130Bright fluorescent silica-nanoparticle probes for high-resolution STED and confocal microscopy
resolves10.1039/c0nr00253dAbsolute quantum yield measurements of colloidal NaYF4: Er3+, Yb3+ upconverting nanoparticles
resolves10.1002/anie.201003959Direct Evidence of a Surface Quenching Effect on Size‐Dependent Luminescence of Upconversion Nanoparticles
resolves10.1038/nnano.2014.29Engineering bright sub-10-nm upconverting nanocrystals for single-molecule imaging
resolves10.1016/0003-2697(88)90412-5Mechanism of fluorescence concentration quenching of carboxyfluorescein in liposomes: Energy transfer to nonfluorescent dimers
resolves10.1039/F29817701735Dimeric and trimeric states of the fluorescein dianion. Part 2.—Effects on fluorescence characteristics
resolves10.1021/jp0734530Site-Selective Photoinduced Electron Transfer from Alcoholic Solvents to the Chromophore Facilitated by Hydrogen Bonding: A New Fluorescence Quenching Mechanism
resolves10.1021/jp983241qSpectroscopy of Fluorescein (FITC) Dyed Colloidal Silica Spheres
resolves10.1038/nmat3804Enhancing multiphoton upconversion through energy clustering at sublattice level
resolves10.1021/jacs.7b00223Direct Evidence for Coupled Surface and Concentration Quenching Dynamics in Lanthanide-Doped Nanocrystals
resolves10.1002/cphc.201500724Shielding Upconversion by Surface Coating: A Study of the Emission Enhancement Factor
resolves10.1021/ja800868aUpconversion Multicolor Fine-Tuning: Visible to Near-Infrared Emission from Lanthanide-Doped NaYF<sub>4</sub> Nanoparticles
resolves10.1002/adma.200400772Highly Efficient Multicolour Upconversion Emission in Transparent Colloids of Lanthanide‐Doped NaYF<sub>4</sub> Nanocrystals
resolves10.1103/PhysRevLett.96.017404Intermolecular Interaction and a Concentration-Quenching Mechanism of Phosphorescent Ir(III) Complexes in a Solid Film
resolves10.1039/C5NR08477FLanthanide upconversion luminescence at the nanoscale: fundamentals and optical properties
resolves10.1021/cr020357gUpconversion and Anti-Stokes Processes with f and d Ions in Solids
resolves10.1021/acs.chemrev.6b00691Lanthanide-Activated Phosphors Based on 4f-5d Optical Transitions: Theoretical and Experimental Aspects
resolves10.1038/nmat3149Tuning upconversion through energy migration in core–shell nanoparticles
resolves10.1021/nn402601dNd<sup>3+</sup>-Sensitized Upconversion Nanophosphors: Efficient<i>In Vivo</i>Bioimaging Probes with Minimized Heating Effect
resolves10.1039/C7NR01403AEmploying shells to eliminate concentration quenching in photonic upconversion nanostructure
resolves10.1063/1.4760248Rare earth luminescence: A way to overcome concentration quenching
resolves10.1039/C7NR01456BDepth-profiling of Yb
<sup>3+</sup>
sensitizer ions in NaYF
<sub>4</sub>
upconversion nanoparticles
resolves10.1002/smll.201701635Shaping Luminescent Properties of Yb<sup>3+</sup> and Ho<sup>3+</sup> Co‐Doped Upconverting Core–Shell β‐NaYF<sub>4</sub> Nanoparticles by Dopant Distribution and Spacing
resolves10.1039/c1cc14774aBreakthrough in concentration quenching threshold of upconversion luminescence via spatial separation of the emitter doping area for bio-applications
resolves10.1021/nl501366xEngineering Homogeneous Doping in Single Nanoparticle To Enhance Upconversion Efficiency
resolves10.1038/lsa.2018.7Microscopic inspection and tracking of single upconversion nanoparticles in living cells
resolves10.1021/jacs.6b09474Alleviating Luminescence Concentration Quenching in Upconversion Nanoparticles through Organic Dye Sensitization
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
resolves10.1039/C6NR07687DRevisiting the optimized doping ratio in core/shell nanostructured upconversion particles
resolves10.1021/nn302972r(α-NaYbF<sub>4</sub>:Tm<sup>3+</sup>)/CaF<sub>2</sub> Core/Shell Nanoparticles with Efficient Near-Infrared to Near-Infrared Upconversion for High-Contrast Deep Tissue Bioimaging
resolves10.1021/nn505051dAmplifying the Red-Emission of Upconverting Nanoparticles for Biocompatible Clinically Used Prodrug-Induced Photodynamic Therapy
resolves10.1002/smll.201370117Upconversion: Tunable Near Infrared to Ultraviolet Upconversion Luminescence Enhancement in (α‐NaYF<sub>4</sub>:Yb,Tm)/CaF<sub>2</sub> Core/Shell Nanoparticles for In situ Real‐time Recorded Biocompatible Photoactivation (Small 19/2013)
resolves10.1021/acsami.6b05609Highly Enhanced Cooperative Upconversion Luminescence through Energy Transfer Optimization and Quenching Protection
resolves10.1021/ja500933hReversible Near-Infrared Light Directed Reflection in a Self-Organized Helical Superstructure Loaded with Upconversion Nanoparticles
resolves10.1038/ncomms10304Confining energy migration in upconversion nanoparticles towards deep ultraviolet lasing
resolves10.1002/anie.201603028Engineered Upconversion Nanoparticles for Resolving Protein Interactions inside Living Cells
resolves10.1038/ncomms10254Three-dimensional controlled growth of monodisperse sub-50 nm heterogeneous nanocrystals
resolves10.1021/ja4075002Mechanistic Investigation of Photon Upconversion in Nd<sup>3+</sup>-Sensitized Core–Shell Nanoparticles
resolves10.1002/adom.201600556Efficient Broadband Upconversion of Near‐Infrared Light in Dye‐Sensitized Core/Shell Nanocrystals
resolves10.1039/C7NR02594GNd
<sup>3+</sup>
-Sensitized multicolor upconversion luminescence from a sandwiched core/shell/shell nanostructure
resolves10.1039/C7NR02630GHeterogeneously Nd
<sup>3+</sup>
doped single nanoparticles for NIR-induced heat conversion, luminescence, and thermometry
resolves10.1002/smll.201701479Energy Migration Upconversion in Ce(III)‐Doped Heterogeneous Core−Shell−Shell Nanoparticles
resolves10.1002/anie.201504518White‐Light Emission from an Integrated Upconversion Nanostructure: Toward Multicolor Displays Modulated by Laser Power
resolves10.1021/jacs.6b09349Enabling Förster Resonance Energy Transfer from Large Nanocrystals through Energy Migration
resolves10.1002/adma.201503482Photon Upconversion Through Tb<sup>3+</sup>‐Mediated Interfacial Energy Transfer
resolves10.1002/anie.201007979Long‐Term Real‐Time Tracking of Lanthanide Ion Doped Upconverting Nanoparticles in Living Cells
resolves10.1021/acsnano.6b03288Energy-Looping Nanoparticles: Harnessing Excited-State Absorption for Deep-Tissue Imaging
resolves10.1002/adma.201304903Elimination of Photon Quenching by a Transition Layer to Fabricate a Quenching‐Shield Sandwich Structure for 800 nm Excited Upconversion Luminescence of Nd<sup>3+</sup>‐Sensitized Nanoparticles
resolves10.1002/adma.201502272Energy Migration Engineering of Bright Rare‐Earth Upconversion Nanoparticles for Excitation by Light‐Emitting Diodes
resolves10.1021/acs.chemmater.6b00353Energy Migration Up-conversion of Tb<sup>3+</sup> in Yb<sup>3+</sup> and Nd<sup>3+</sup> Codoped Active-Core/Active-Shell Colloidal Nanoparticles
resolves10.1039/C5NR08223DA broadening temperature sensitivity range with a core–shell YbEr@YbNd double ratiometric optical nanothermometer
resolves10.1002/anie.201306811Upconverting Near‐Infrared Light through Energy Management in Core–Shell–Shell Nanoparticles
resolves10.1038/s41467-017-00916-7Binary temporal upconversion codes of Mn2+-activated nanoparticles for multilevel anti-counterfeiting
resolves10.1002/anie.201408219An Upconversion Nanoparticle with Orthogonal Emissions Using Dual NIR Excitations for Controlled Two‐Way Photoswitching
resolves10.1002/anie.201510609Filtration Shell Mediated Power Density Independent Orthogonal Excitations–Emissions Upconversion Luminescence
resolves10.1021/acsnano.7b00559Versatile Spectral and Lifetime Multiplexing Nanoplatform with Excitation Orthogonalized Upconversion Luminescence
resolves10.1038/srep03536Nd3+ Sensitized Up/Down Converting Dual-Mode Nanomaterials for Efficient In-vitro and In-vivo Bioimaging Excited at 800 nm
resolves10.1021/acs.nanolett.7b01753Simultaneous Enhancement of Photoluminescence, MRI Relaxivity, and CT Contrast by Tuning the Interfacial Layer of Lanthanide Heteroepitaxial Nanoparticles
resolves10.1002/adma.201405690Luminescence‐Driven Reversible Handedness Inversion of Self‐Organized Helical Superstructures Enabled by a Novel Near‐Infrared Light Nanotransducer
resolves10.1039/C7NR03682EEmission color tuning of core/shell upconversion nanoparticles through modulation of laser power or temperature
resolves10.1021/acsnano.5b07873A Versatile Imaging and Therapeutic Platform Based on Dual-Band Luminescent Lanthanide Nanoparticles toward Tumor Metastasis Inhibition
resolves10.1021/acs.jpclett.5b01180Nd<sup>3+</sup>-Sensitized Ho<sup>3+</sup> Single-Band Red Upconversion Luminescence in Core–Shell Nanoarchitecture
resolves10.1021/cm5022382Cross Relaxation Induced Pure Red Upconversion in Activator- and Sensitizer-Rich Lanthanide Nanoparticles
resolves10.1038/s41467-017-00917-6Boosting the down-shifting luminescence of rare-earth nanocrystals for biological imaging beyond 1500 nm
resolves10.1038/s41467-017-01141-yAchieving high-efficiency emission depletion nanoscopy by employing cross relaxation in upconversion nanoparticles
resolves10.1038/ncomms7938Single-band upconversion nanoprobes for multiplexed simultaneous in situ molecular mapping of cancer biomarkers
resolves10.1002/anie.201104192Single‐Band Upconversion Emission in Lanthanide‐Doped KMnF<sub>3</sub> Nanocrystals
resolves10.1002/adma.201104741Mn<sup>2+</sup> Dopant‐Controlled Synthesis of NaYF<sub>4</sub>:Yb/Er Upconversion Nanoparticles for in vivo Imaging and Drug Delivery
resolves10.1021/nl3017994Combinatorial Discovery of Lanthanide-Doped Nanocrystals with Spectrally Pure Upconverted Emission
resolves10.1002/anie.201703012Confining Excitation Energy in Er<sup>3+</sup>‐Sensitized Upconversion Nanocrystals through Tm<sup>3+</sup>‐Mediated Transient Energy Trapping
resolves10.1088/0957-4484/20/38/385704Upconversion emission tuning from green to red in Yb<sup>3+</sup>/Ho<sup>3+</sup>-codoped NaYF<sub>4</sub>nanocrystals by tridoping with Ce<sup>3+</sup>ions
resolves10.1039/C4TC00585FEnhanced red upconversion luminescence by codoping Ce
<sup>3+</sup>
in β-NaY(Gd
<sub>0.4</sub>
)F
<sub>4</sub>
:Yb
<sup>3+</sup>
/Ho
<sup>3+</sup>
nanocrystals
resolves10.1039/C2NR32482BUpconversion luminescence with tunable lifetime in NaYF
<sub>4</sub>
:Yb,Er nanocrystals: role of nanocrystal size
resolves10.1126/science.aak9913Nanometer resolution imaging and tracking of fluorescent molecules with minimal photon fluxes
resolves10.1039/C7CP00918FDistinct mechanisms for the upconversion of NaYF
<sub>4</sub>
:Yb
<sup>3+</sup>
,Er
<sup>3+</sup>
nanoparticles revealed by stimulated emission depletion
resolves10.1103/PhysRevB.84.153413Super-resolution upconversion microscopy of praseodymium-doped yttrium aluminum garnet nanoparticles
resolves10.1039/C7SC01393KManipulating energy transfer in lanthanide-doped single nanoparticles for highly enhanced upconverting luminescence
resolves10.1021/acsami.6b16842Sequential Growth of NaYF<sub>4</sub>:Yb/Er@NaGdF<sub>4</sub> Nanodumbbells for Dual-Modality Fluorescence and Magnetic Resonance Imaging
resolves10.1002/anie.201508838Synthesis of 10 nm β‐NaYF<sub>4</sub>:Yb,Er/NaYF<sub>4</sub> Core/Shell Upconversion Nanocrystals with 5 nm Particle Cores
resolves10.1039/C7NR04877GTuning hexagonal NaYbF
<sub>4</sub>
nanocrystals down to sub-10 nm for enhanced photon upconversion
resolves10.1039/C5NR05437KTailoring dye-sensitized upconversion nanoparticle excitation bands towards excitation wavelength selective imaging
resolves10.1021/acsnano.5b06383Dye-Sensitized Core/Active Shell Upconversion Nanoparticles for Optogenetics and Bioimaging Applications
resolves10.1038/nmat4093Resonant energy transfer of triplet excitons from pentacene to PbSe nanocrystals
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