A pathway for achieving intense green light emitting LiGdF4:Yb,Er upconversion nanophosphors (UCNPs) via Y(3+) doping is demonstrated. It was revealed that Y(3+) doping initiated the formation of a tetragonal phase and affected the particle size. Single tetragonal-phase LiGd0.4Y0.4F4:Yb(18%),Er(2%) (LGY0.4F:Yb,Er) UCNPs exhibited strong upconversion (UC)… (More)
The major challenges in practically utilising the immense potential benefits of nanomaterials are controlling aggregation, recycling the nanomaterials, and fabricating well-defined nanoparticulate materials using innovative methods. We present a novel innovative synthetic strategy for core-shell bimetallic nanoparticles that are well-defined, ligand-free,… (More)
We present colloidal silica microspheres encapsulating a homogeneous quantum dot layer at radial equidistance from the centre by utilizing electrostatic interaction between surface-engineered silica microspheres and QDs. The microspheres show dramatically enhanced optical absorption and emission with an appropriate silica shell thickness.
Although the quantum efficiencies of quantum dots (QDs) are approaching unity through advances in the synthesis of QD materials, their luminescence efficiencies after mixing with resin and thermal curing for white light-emitting diodes (LEDs) are seriously lowered because of aggregation and oxidation of QDs and poor adhesion of QDs to the resin. To overcome… (More)
Nano-sized materials are increasingly used in cosmetics, diagnosis, imaging, and drug delivery. It also involved in specific functionality with lymphoid systems. However, the toxicity and mechanisms of quantum dots (QDs) uptake into mammalian cells are poorly understood. Our study was to investigate the toxicity and tissue uptake of polyethylene… (More)
Tissue distribution and observable-adverse-effect-level of cadmium selenide/cadmium sulfide (CdSe/CdS) quantum dots (QDs) were investigated to get important information of this QDs. Female BALB/c mice were treated with single intravenous (IV) injection of polyethylene glycol-folic acid-coated QDs (CdSe/CdS-PEG-FA) at different concentrations (0, 270, and… (More)