Plant tissue imaging with bipyramidal upconversion nanocrystals by introducing Tm³⁺ ions as energy trapping centers

Abstract

Plant cell imaging is critical for agricultural production and plant pathology study. Advanced upconversion nanoparticles (UCNPs) are being developed as fluorescent probes for imaging cells and tissues in vivo and...

Coordination Polymerization-Induced Emission Based on a Salicylaldehyde Hydrazone AIEgen toward Zn2+ Detection

“…However, prominent green fluorescence was found in the cytoderm of onion epidermal cells after adding additional Zn 2+ and incubation for 10 min. The nonfluorescent behavior of the inner cell indicates that considerable thickness , and insufficient pore diameter of the plant cell wall restrain the H 2 hbih from entering the cell.…”

Recent advances in lanthanide-doped up-conversion probes for theranostics

“…For in vitro experiments, the Ln-UCNPs oleogel could penetrate the skin more deeply than free OA-Ln-UCNPs and be used as a skin tissue imaging agent under near-infrared excitation. Xu and co-workers reported the application of Ln-UCNPs in plant cell imaging, whereby LiErF4:1%Tm 3+ @LiYF4 with a core-shell structure could enter the cell membrane easily and emit bright red light ( Qiao et al, 2021 ).…”

Pressure-induced structural phase transition, irreversible amorphization and upconversion luminescence enhancement in Ln3+-codoped LiYF4 and LiLuF4

“…13 Besides, the Y hexagon-circle arrangement in LiYF 4 was proved to promote the UV UC intensity by about 3 times compared with NaYF 4 at the same doping level (70%Yb 3+ ,0.2%Tm 3+ ), 14 so that Ln 3+ -doped LiYF 4 and LiLuF 4 have attracted considerable attention owing to their excellent UC properties and promising applications in the fields of solid-state lasing, solar cells, biomedical imaging, and phototherapy. 15–20…”

“…13 Besides, the Y hexagon-circle arrangement in LiYF 4 was proved to promote the UV UC intensity by about 3 times compared with NaYF 4 at the same doping level (70%Yb 3+ ,0.2%Tm 3+ ), 14 so that Ln 3+ -doped LiYF 4 and LiLuF 4 have attracted considerable attention owing to their excellent UC properties and promising applications in the fields of solid-state lasing, solar cells, biomedical imaging, and phototherapy. [15][16][17][18][19][20] Hydrostatic pressure, a thermodynamic variable besides temperature, can efficiently tune the crystal structure and electronic configuration of the materials. [21][22][23] In general, high pressures (HPs) can give rise to a series of variations in physicochemical characteristics through manipulating the crystal structure, that is, the pressure-driven contractive lattice volume, shortened interionic distances, newly emerged defects, transformed symmetry, and even phase transition or amorphization can possibly induce drastic changes in the electronic structure, phonon energy, electroconductivity, magnetism, thermostability, and mechanical and optical properties.…”