A5108049724- Luminescence Properties of Advanced Materials
- Perovskite Materials and Applications
- Nanoplatforms for cancer theranostics
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Quantum Dots Synthesis And Properties
- Lanthanide and Transition Metal Complexes
- Solid State Laser Technologies
- Nanocluster Synthesis and Applications
- Glass properties and applications
- Inorganic Fluorides and Related Compounds
- Solid-state spectroscopy and crystallography
- Advanced biosensing and bioanalysis techniques
- Advanced Photocatalysis Techniques
- Optical properties and cooling technologies in crystalline materials
- Photorefractive and Nonlinear Optics
- Carbon and Quantum Dots Applications
- Radiation Detection and Scintillator Technologies
- Advanced Nanomaterials in Catalysis
- Speech Recognition and Synthesis
- Photodynamic Therapy Research Studies
- Inorganic Chemistry and Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Molecular Sensors and Ion Detection
Chinese Academy of Sciences
2016-2025
Fujian Institute of Research on the Structure of Matter
2016-2025
Shanghai Pulmonary Hospital
2009-2025
State Key Laboratory of Structural Chemistry
2010-2025
Tan Kah Kee Innovation Laboratory
2020-2025
University of Chinese Academy of Sciences
2016-2025
Fuzhou University
2016-2025
Fujian Normal University
2017-2025
Sun Yat-sen University
2023-2025
Sun Yat-sen University Cancer Center
2023-2025
All-inorganic cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) quantum dots (QDs), possessing high photoluminescence yields tunable color output, have recently been endowed great promise for high-performance solar cells light-emitting diodes (LEDs). Although moisture stability has greatly improved through separating QDs with a SiO2 shell, the practical applications of CsPbX3 are severely restricted by their poor thermal stability, which is associated intrinsically low formation...
Molecular ferroelectrics are highly desirable for their easy and environmentally friendly processing, light weight, mechanical flexibility. We found that diisopropylammonium bromide (DIPAB), a molecular crystal processed from aqueous solution, is ferroelectric with spontaneous polarization of 23 microcoulombs per square centimeter [close to barium titanate (BTO)], high Curie temperature 426 kelvin (above BTO), large dielectric constant, low loss. DIPAB exhibits good piezoelectric response...
A strategy is proposed to fabricate dual-mode luminescent NaGdF4 nanocrystals that are composed of NaGdF4:Yb3+,Tm3+ core and NaGdF4:Eu3+ shell. Intense downconversion via the sensitization Gd3+ upconversion luminescence Eu3+ one order magnitude higher than triply-doped only counterparts have been achieved by employing distinct core/shell nanostructures double sensitizations Yb3+ Tm3+.
Lanthanide-doped upconversion nanoparticles have been the focus of a growing body investigation because their promising applications ranging from data storage to biological imaging and drug delivery. Here we present rational design, synthesis, characterization new class core-shell displaying unprecedented optical properties. Specifically, show that epitaxial growth an optically inert NaYF(4) layer around lanthanide-doped NaGdF(4)@NaGdF(4) nanoparticle effectively prevents surface quenching...
Lanthanide-doped upconversion nanoparticles (UCNPs) have shown great promise in bioapplications. Exploring new host materials to realize efficient luminescence (UCL) output is a goal of general concern. Herein, we develop unique strategy for the synthesis novel LiLuF4 :Ln(3+) core/shell UCNPs with typically high absolute quantum yields 5.0 % and 7.6 Er(3+) Tm(3+) , respectively. Based on our customized UCL biodetection system, demonstrate first time application as sensitive bioprobes...
Amine-functionalized lanthanide-doped KGdF(4) nanocrystals, synthesized via a facile one-step solvothermal route by employing polyethylenimine as the surfactant and capping ligand, have been demonstrated to be sensitive time-resolved FRET bioprobes detect trace amount of biomolecules such avidin at concentration 5.5 nM potential T(1)-MRI contrast agents due large longitudinal relaxivity Gd(3+) (5.86 S(-1)·mM(-1) per Gd ion 3.99 × 10(5) nanocrystal).
Background elimination and improved sensitivity were achieved by time-resolved (TR) detection with a FRET biosensor for traces of biomolecules such as avidin at concentrations down to 4.8 nM. As shown in the picture, UV excitation biotinylated NaYF4:Ce/Tb nanocrystals triggers energy transfer fluorescein isothiocyanate (FITC), whose long-lived emission due can be distinguished from short-lived background direct excitation. Detailed facts importance specialist readers are published...
The energy levels and local structures of Eu3+ incorporated in the lattice surface sites ZnO nanocrystals were investigated based on high-resolution fluorescence spectra at 10 K. Radiative emissions from 5D1 first observed for site ZnO. It is shown that symmetry descends C3v to Cs or C1, whereas ions occupy more disordered lowest C1. luminescence decay 5D0 site, showing a rise time longer lifetime, behaves distinctly sites. Because small filling factor (52%) nanoparticles, lifetime...
Attribution of extreme events is a challenging science and one that currently undergoing considerable evolution. In this paper are 19 analyses by 18 different research groups, often using quite methodologies, 12 occurred in 2012. addition to investigating the causes these events, multiple four high temperatures United States, record low levels Arctic sea ice, heavy rain northern Europe eastern Australia, provide an opportunity compare contrast strengths weaknesses various methodologies. The...
Abstract All-inorganic CsPbX 3 (X = Cl, Br, and I) perovskite quantum dots (PeQDs) have shown great promise in optoelectronics photovoltaics owing to their outstanding linear optical properties; however, nonlinear upconversion is limited by the small cross-section of multiphoton absorption, necessitating high power density excitation. Herein, we report a convenient versatile strategy fine tuning luminescence PeQDs through sensitization lanthanide-doped nanoparticles. Full-color emission with...
In this work, a simple method is demonstrated for the synthesis of multifunctional core–shell nanoparticles NaYF 4 :Yb,Er@NaYF :Yb@NaNdF :Yb@NaYF :Yb@PAA (labeled as Er@Y@Nd@Y@PAA or UCNP@PAA), which contain highly effective 808‐nm‐to‐visible UCNP core and thin shell poly(acrylic acid) (PAA) to achieve upconversion bioimaging pH‐sensitive anticancer chemotherapy simultaneously. The Nd 3+ ‐sensitized UCNPs are optimized by varying number, size, host lattices. final Er@Y@Nd@Y nanoparticle...
Abstract As emerging efficient emitters, metal‐halide perovskites offer the intriguing potential to low‐cost light emitting devices. However, semiconductors generally suffer from severe luminescence quenching due insufficient confinement of excitons (bound electron–hole pairs). Here, Sn‐triggered extrinsic self‐trapping in bulk 2D perovskite crystal, PEA 2 PbI 4 (PEA = phenylethylammonium), is reported, where exciton never occurs its pure state. By creating local wells, isoelectronic Sn...
High-resolution photoluminescence spectroscopy employing Eu3+ as the structural probe unambiguously revealed a universal breakdown of crystallographic site symmetry in lanthanide-doped disordered crystals. The spectroscopic symmetries descend from Oh to Cs (or C2) α-NaYF4, and C3h β-NaYF4, which were further verified by crystal-field level fitting. Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or...
Ag2S quantum dots (QDs) have attracted increasing attention due to their appealing optical properties in the near-infrared regime. However, a full understanding of confinement effect QDs has not been achieved so far. Herein, for first time, size-dependent excited state are systematically investigated by photoluminescence (PL), PL excitation (PLE), and time-resolved spectroscopy. Experimentally, we determine exciton Bohr radius as 2.2 nm, which is highly consistent with theoretical results.
Ultrasmall inorganic oxide nanoparticles doped with trivalent lanthanide ions (Ln(3+)), a new and huge family of luminescent bioprobes, remain nearly untouched. Currently it is challenge to synthesize biocompatible ultrasmall bioprobes. Herein, we report bioprobe based on sub-5 nm amine-functionalized tetragonal ZrO(2)-Ln(3+) synthesized via facile solvothermal method ligand exchange. By utilizing the long-lived luminescence Ln(3+), demonstrate its application as sensitive time-resolved...
Perovskite ferroelectrics with prominent nonlinear optical absorption have attracted great attention in the field of photonics. However, they are traditionally dominated by inorganic oxides and exhibit relatively small coefficients, which hinder their further applications. Herein, we report a new organic–inorganic hybrid bilayered perovskite ferroelectric, (C4H9NH3)2(NH2CHNH2)Pb2Br7 (1), showing an above-room-temperature Curie temperature (∼322 K) notable spontaneous polarization (∼3.8 μC...
Abstract The design of bright NIR‐II luminescent nanomaterials that enable efficient labelling proteins without disturbing their physiological properties in vivo is challenging. We developed an strategy to synthesize gold nanoclusters (Au NCs) protected by biocompatible cyclodextrin (CD). Leveraging the ultrasmall size Au NCs (<2 nm) and strong macrocycle‐based host–guest chemistry, as‐synthesized CD‐Au can readily label proteins/antibodies. Moreover, labelled proteins/antibodies highly...
Impurity doping is an effective approach to tuning the optoelectronic performance of host materials by imparting extrinsic electronic channels. Herein, a family lanthanide (Ln3+) ions was successfully incorporated into Bi:Cs2AgInCl6 lead-free double-perovskite (DP) semiconductor, expanding spectral range from visible (Vis) near-infrared (NIR) and improving photoluminescence quantum yield (PLQY). After multidoping with Nd, Yb, Er Tm, Bi/Ln:Cs2AgInCl6 yielded ultrabroadband continuous emission...
Abstract Higher order multiphoton-pumped polarized lasers have fundamental technological importance. Although they can be used to in vivo imaging, their application has yet realized. Here we show the first three-photon-pumped (3PP) microcavity laser a single host–guest composite metal–organic framework (MOF) crystal, via controllable situ self-assembly strategy. The highly oriented assembly of dye molecules within MOF provides an opportunity achieve 3PP lasing with low threshold and very...
Abstract Rare earth (RE 3+ )-doped phosphors generally suffer from thermal quenching, in which their photoluminescence (PL) intensities decrease at high temperatures. Herein, we report a class of unique two-dimensional negative-thermal-expansion phosphor Sc 2 (MoO 4 ) 3 :Yb/Er. By virtue the reduced distances between sensitizers and emitters as well confined energy migration with increasing temperature, 45-fold enhancement green upconversion (UC) luminescence 450-fold near-infrared...