Abstract The synthesis (by a facile two‐step sol–gel process), characterization, and application in controlled drug release is reported for monodisperse core–shell‐structured Fe 3 O 4 @ n SiO 2 m @NaYF : Yb 3+ , Er /Tm nanocomposites with mesoporous, up‐conversion luminescent, magnetic properties. show typical ordered mesoporous characteristics spherical morphology narrow size distribution (around 80 nm). In addition, they exhibit high magnetization (38.0 emu g −1 thus it possible targeting...

In this study, we have developed, for the first time, a facile in situ growth process to prepare hierarchical three-dimensional (3D) composite composed of graphene layers with layered double hydroxide (LDH) nanosheet arrays grown on both sides. The fabrication involves coating AlOOH colloids onto surfaces and subsequent NiAl–LDH sheets via hydrothermal process. It is found that grow perpendicularly uniformly sides sheets, constructing 3D nanocomposite an interesting sandwich structure. This...

Reactive oxygen species (ROS)-based therapeutic modalities including chemodynamic therapy (CDT) and photodynamic (PDT) hold great promise for conquering malignant tumors. However, these two methods tend to be restricted by the overexpressed glutathione (GSH) hypoxia in tumor microenvironment (TME). Here, we develop biodegradable copper/manganese silicate nanosphere (CMSN)-coated lanthanide-doped nanoparticles (LDNPs) trimodal imaging-guided CDT/PDT synergistic therapy. The tridoped...

Well-defined one-dimensional NaLuF4:Yb3+,Er3+/Tm3+/Ho3+ microtubes and microrods were successfully prepared by a surfactant-free molten salt method for the first time. It is found that with prolonged time, phase of NaLuF4 transforms from cubic to hexagonal, while morphology changes nanoparticles then microrods. Moreover, upon 980 nm laser diode (LD) excitation, white up-conversion (UC) light was achieved properly tuning sensitizer (Yb3+) concentration in host matrix. The relative emission...

Abstract Aggregation‐induced emission luminogens (AIEgens) that undergo excited‐state intramolecular proton transfer (ESIPT) have many applications in bioimaging since they high quantum efficiency the aggregated state and a low background signal aqueous solutions because of their large Stokes shift. One disadvantage AIEgens with ESIPT has been described so far is require time‐consuming synthesis use toxic reagents. Another most these materials are only used for cells unsuitable vivo...

A novel sandwich-structured rGO/Ni_0.83Co_0.17Al-LDH hybrid composite exhibits high supercapacitor performance, with a specific capacitance of 1902 F g⁻¹ at 1 g⁻¹, and excellent cycling stability.

Pure hexagonal NaYF4:Yb3+,Ln3+ (Ln3+ = Er3+, Tm3+, Ho3+) crystals were obtained for the first time through a facile microwave (MW) reflux method at relatively low temperature (160 °C) and atmospheric pressure within only 50 min. By controllably increasing NH4F content in ethylene glycol (EG) solvent, phase of as-prepared gradually transforms from cubic to hexagonal. Correspondingly, up-conversion (UC) emission intensities are increased by 10–12 times compared those phase. A possible growth...

Targeted drug delivery and controllable generation of oxygen-independent toxic free radicals in tumor hypoxia environments are great importance cancer therapy. Here, a thermoresponsive nanoplatform was introduced by modifying carbon-coated iron carbide (Fe5C2) nanoparticles with bovine serum albumin (BSA) to achieve better water solubility biocompatibility. Then type polymerization initiator (AIPH) effectively loaded on the surface Fe5C2–BSA sealed phase change material (PCM) for higher...

Nanomaterials that show aggregation-induced emission (AIE) have tremendous potential in sensors, bioimaging, phototherapy and organic light-emitting diodes. Although big progress been achieved developing AIE nanomaterials their applications, one downside of most previously described is they required the complicated synthesis precursor molecules several preparative steps. Here, a biomass material, cellulolytic enzyme lignin (CEL), was used to prepare nanoparticles (CEL-NPs) by simple one-step...

Carbon dots, which are less than 10 nm in diameter, have been widely investigated because of their unique luminescence properties and potential for use bioimaging. In the present work, natural carbon dots (L-CDs) were obtained by molecular aggregation, using ethanol-extracted cellulolytic enzyme lignin. The whole process preparation L-CDs was green simple to operate did not toxic chemical reagents or harsh conditions. newly prepared emitted multicolor photoluminescence following one-...

Preparation of CS-CDs from coffee shell beans and applications in <italic>in vivo</italic> bioimaging as an antioxidant.

Single-atom nanozymes (SANs) have attracted great attention in constructing devices for instant biosensing due to their excellent stability and atom utilization. Here, Mo atoms were immobilized 2D nitrogen-doped carbon films by cascade-anchored one-pot pyrolysis obtain single-atom nanozyme (Mo-SAN) with high atomic loading (4.79 wt %) peroxidase-like activity. The coordination environment enzyme-like activity mechanism of Mo-SAN studied combining synchrotron radiation density functional...

Single-atom nanozymes (SANs) are considered to be ideal substitutes for natural enzymes due their high atom utilization. This work reported a strategy manipulate the second coordination shell of Ce and reshape carbon carrier improve oxidase-like activity SANs. Internally, S atoms were symmetrically embedded into layer form Ce–N4S2–C structure, which reduced energy barrier O2 reduction, promoted electron transfer from O atoms, enhanced interaction between d orbital p atoms. Externally, in...

Multicolor and monodisperse Gd2O3:Ln (Ln = Eu3+, Tb3+, Dy3+, Sm3+, Yb3+/Er3+, Yb3+/Tm3+, Yb3+/Ho3+) nanocrystals (NCs) with narrow size distribution were prepared by a homogeneous precipitation method followed subsequent calcination process. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), Fourier transformed infrared (FT-IR), thermogravimetric differential thermal analysis (TG-DTA), photoluminescence (PL) spectra, cathodoluminescence (CL) kinetic decays...

A novel, fibrous-structured bifunctional (magnetic and mesoporous) Fe3O4/silica microsphere was successfully synthesized through a simple economical self-assembled process in which hydrophobic 9 nm-Fe3O4nanocrystals were directly used without modifications. The obtained material is performed as drug delivery carrier to investigate the vitro intracellular properties of doxorubicin hydrochloride (DOX). X-Ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM),...

Hollow La(2)O(3):Ln (Ln = Yb/Er, Yb/Ho) microspheres with up-conversion (UC) luminescence properties were successfully synthesized via a facile sacrificial template method by employing carbon spheres as hard templates followed subsequent heating process. The structure, morphology, formation process, and fluorescent are well investigated various techniques. results indicate that the hollow can be indexed to hexagonal La(2)O(3) phase. uniform diameter of about 270 nm maintain spherical...