The use of labelling or staining agents has greatly assisted the study complex biological interactions in field biology. In particular, fluorescent biomolecules been demonstrated as an indispensable tool many studies. Types that are commonly used include conventional classes organic fluorophores such fluorescein and cyanine dyes, well newer types inorganic nanoparticles QDs, novel latex/silica nanobeads. labels gaining increasing popularity place their predecessors due to better optical...

Upconverting materials, which can be efficiently excited by near infrared light and emit strong visible through a process termed 'upconversion fluorescence', have shown great potential for use in biological labelling imaging. Some upconverting nanoparticles such as NaYF4 doped with lanthanide ions been synthesized; however, these are not soluble water, biocompatible do functional chemical groups conjugation of biomolecules, result their bioapplications very limited unless some surface...

Controlling excitation power is the most convenient approach to dynamically tuning upconversion that essential for a variety of studies. However, this suffers from significant constraint due insensitive response systems power. Here we present study amplifying power-sensitivity in Ho3+ ions through use NaYbF4 host. Mechanistic investigation reveals sensitive stems maximal incident energy enabled by concentrated Yb3+ sensitizers. This allows us sensitively tune red-to-green emission intensity...

We describe the use of a layer-by-layer hierarchical nanostructure to exploit synergy different lanthanide ions for converting single wavelength excitation into emissions spanning whole spectral region. By lining up set with matched energy levels in core–shell nanostructure, we demonstrate well-defined cascades transfer that gives access optical from large collection (Tb3+, Eu3+, Dy3+, Sm3+, Nd3+, Yb3+, and Er3+) after common sensitizer Ce3+ featuring broad absorption. Through optimization...

Lanthanide-based nanocrystals have shown great potential to be used as luminescent materials but their biological applications been limited because most of the synthesized so far are not water soluble or biocompatible. We report a very straightforward method synthesize and biocompatible LaF3 doped with Eu3+ via facile co-precipitation natural biopolymer, chitosan. The fluorescent small size about 20 nm. Chitosan is found cap during synthesis process, which renders them biocompatible,...

Water-soluble lanthanide-doped LaF3 nanocrystals were synthesized using a simple method carried out in aqueous solution at low temperature. The have nearly spherical shape and an average size of below 30 nm. They consisted well crystallized hexagonal phases. luminescence quantum efficiency was about 16% solution. doped with different lanthanide ions (Eu3+, Ce3+, Tb3+, Nd3+) synthesized, which showed strong the visible (VIS) near-infrared (NIR) spectral regions.

Multicolour colloidal PEI/NaGdF4:Ce3+,Ln3+ (Ln = Tb, Eu, Sm or Dy) nanocrystals were synthesized using a simple one-pot hydrothermal procedure. The consist of well crystallized hexagonal phase and have an elongated spherical shape, with diameters between 25 45 nm. Under single-wavelength excitation at 254 nm in the ultraviolet (UV) region, doped different lanthanide ions show intense visible (VIS) emissions colours. characteristic luminescence property can be attributed to strong absorption...

An effective colloidal process involving the hot‐injection method is developed to synthesize uniform nanoflowers consisting of 2D γ‐In 2 Se 3 nanosheets. By exploiting narrow direct bandgap and high absorption coefficient in visible light range In , a high‐quality /Si heterojunction photodiode fabricated. This shows photoresponse under illumination, short response/recovery times, long‐term durability. addition, self‐powered displays broadband spectral response ranging from UV IR with...

Abstract Core–shell structured nanoparticles are increasingly used to host luminescent lanthanide ions but the structural integrity of these still lacks sufficient understanding. Herein, we present a new approach detect diffusion dopant in core–shell nanostructures using probes whose emission profile and luminescence lifetime sensitive chemical environment. We show that solution‐synthesized firmly confined designed locations. However, annealing at certain temperatures (greater than circa 350...

A class of one-dimensional hollow microstructure is described, which was formed by a kinetically controlled crystal growth process. hexagonal-phase NaYbF4 microrod comprising isolated holes along the longitudinal axis synthesized one-pot hydrothermal method with assistance citrate ligands. The structural void feature modulates light intensity across microrods as result interference arising from scattering and reflection inner walls. single doped upconverting lanthanide ions. Upon...

Abstract Metal halide crystals are bright but hygroscopic scintillator materials that widely used in X‐ray imaging and detectors. Precipitating them situ glass to form ceramics (GCs) offers an efficient avenue for large‐scale preparation, high spatial resolution, excellent stability. However, precipitating a fraction of metal nanocrystals maintain light yield remains challenge. Herein, ionic‐covalent hybrid network strategy constructing GCs with crystallinity (up ≈37%) BaCl 2 : Eu 2+ is...

The upconversion luminescence and near infrared of the Er3+ ions in transparent oxyfluoride glass ceramics containing SrF2 nanocrystals have been investigated. formation was confirmed by x-ray diffraction. oscillator strengths for several transitions obtained then Judd-Ofelt parameters were determined. split emission peaks can be observed because incorporated into crystalline environment nanocrystals. intensity increased significantly with increasing crystallization time. transition...

The preparation process and upconversion luminescence of the Er(3+)-doped glass ceramics containing Ba(2)LaF(7) nanocrystals were investigated. formation in was confirmed by X-ray diffraction. exhibited highly efficient comparison with glasses. With increase heat treatment temperature intensity increased gradually. composition glasses also found to have significant influence on crystallization ceramics. mixture La(2)O(3) La(2)F(3) could be obtained controlling different compositions varied...

Near-infrared quantum cutting is widely studied for its potential application in photovoltaic solar cells. By using a fluorometer equipped with an integrating sphere, we measured the external yield of near-infrared Er3+/Yb3+ doped La2O2S. It found that by optimizing synthesis process and dopant concentration, higher than 100% can be achieved. Additionally, comprehensively considering emission efficiency dopants as well energy transfer between them, estimated could good accordance one.

The Ce3+ and Dy3+ codoped oxyfluoride glasses glass ceramics containing LaF3 nanocrystals have been prepared in the reducing atmosphere. emission intensity Commission International de I'Eclairage (CIE) chromaticity coordinates of significantly changed with concentration ratio to Dy3+. both ions 3.0% increased comparison that glass. could emit bright white light by adjusting

An effective colloidal process involving the hot-injection method is developed to synthesize uniform single-crystalline Sb2Se3 nanorods in high yields. The photoconductive characteristics of as-synthesized are investigated by developing a film-based photodetector and this device displays remarkable response visible light with an "ON/OFF" ratio as 50 (with incident density 12.05 mW cm(-2)), short response/recovery times long-term durability. To overcome challenge intrinsic low electrical...

A hierarchical porous carbon fiber (HPCF) was prepared <italic>via</italic> electrospinning. The HPCF cathode delivers a high reversible capacity of 1070.6 mA h g⁻¹ at 0.5C and stable cycle performance with retention 88.4% after 100 cycles.