Internalization study of nanosized zeolite crystals in human glioblastoma cells.

While the use of nanozeolites for cancer treatment holds a great promise, it also requires a better understanding of the interaction between the zeolite nanoparticles and cancer cells and notably their internalization and biodistribution. It is particularly important in situation of hypoxia, a very common situations in aggressive cancers, which may change the energetic processes required for cellular uptake. Herein, we studied, in vitro, the kinetics of the internalization process and the intracellular localization of nanosized zeolite X (FAU-X) into glioblastoma cells.

Real-Time Capturing of Microscale Events Controlling the Sintering of Lead-Free Piezoelectric Potassium-Sodium Niobate.

Sintering is a very important process in materials science and technological applications. Despite breakthroughs in achieving optimized piezoelectric properties, fundamentals of K Na NbO (KNN) sintering are not yet fully understood, facing densification versus grain growth competition. At present, microscale events during KNN sintering under reducing atmospheres are real-time monitored using a High Temperature-Environmental Scanning Electron Microscope.

3D LiMn O Thin Film Deposited by ALD: A Road toward High-Capacity Electrode for 3D Li-Ion Microbatteries.

Miniaturized electronics suffer from a lack of energy autonomy. In that context, the fabrication of lithium-ion solid-state microbatteries with high performance is mandatory for powering the next generation of portable electronic devices. Here, the fabrication of a thin film positive electrode for 3D Li-ion microbatteries made by the atomic layer deposition (ALD) method and in situ lithiation step is demonstrated.

Atomic Layer Deposition of a Nanometer-Thick LiPO Protective Layer on LiNiMnO Films: Dream or Reality for Long-Term Cycling?

LiNiMnO (LNMO) is a promising 5V-class electrode for Li-ion batteries but suffers from manganese dissolution and electrolyte decomposition owing to the high working potential. An attractive solution to stabilize the surface chemistry consists in mastering the interface between the LNMO electrode and the liquid electrolyte with a surface protective layer made from the powerful surface deposition method. Here, we show that a 7400 nm thick sputtered LNMO film coated with a nanometer-thick lithium-ion-conductive LiPO layer was deposited by the atomic layer deposition method.

Hot-Electron Photodynamics in Silver-Containing BEA-Type Nanozeolite Studied by Femtosecond Transient Absorption Spectroscopy.

Silver cations were introduced in nanosized BEA-type zeolite containing organic template by ion-exchange followed by chemical reduction towards preparation of photoactive materials (Ag -BEA). The stabilization of highly dispersed Ag nanoparticles with a size of 1-2 nm in the BEA zeolite was revealed. The transient optical response of the Ag-BEA samples upon photoexcitation at 400 nm was studied by femtosecond absorption.