来源：ACS PublicationsAnion order in heteroanionic compounds may induce electrical dipoles and the formation of noncentrosymmetric polar structures. The majority of perovskite oxynitrides are centrosymmetric, but some of them show high dielectric permittivities and ferroelectric response resulting from local anion order. Here, we report a study of polar, partially anion-ordered Nd2AlO3N and Sm2AlO3N n = 1 Ruddlesden–Popper oxynitrides, prepared by solid-state reaction in flowing N2 at 1500 °C. They crystallize in the noncentrosymmetric I4mm space group with parameters a = 3.703314(3) and c =...
Release time:
2026
-
10
-
15
viewed：0
来源：ACS PublicationsThe rare-earth (RE) metal doping strategies have been investigated for many applications in perovskite materials. However, prior approaches to synthesizing RE-doped perovskite nanocrystals (PNCs) have predominantly required harsh synthesis conditions, including an inert gas atmosphere and high temperatures. Here, we present a doping strategy using four RE ions (La3+, Nd3+, Gd3+, and Er3+) doped into FAPbI3 PNCs under mild conditions (50 °C) in an ambient atmosphere. Density functional theory calculations were performed to rationalize the RE incorporation by evaluating t...
Release time:
2026
-
10
-
14
viewed：0
来源：ACS PublicationsTumor cells display a strong dependency on nutrients, yet nutrient-deprivation strategies often fail due to their metabolic plasticity and compensatory mechanisms, and can even promote invasion and metastasis. Here, we propose a metabolic therapeutic strategy that leverages rather than suppresses tumor nutrient addiction, termed “pseudo-overnutrition”. This approach induces tumor cells to continuously uptake nutrient analogs that cannot be effectively utilized, thereby decoupling nutrient input from nutrient utilization and triggering metabolic collapse. To validate this con...
Release time:
2026
-
10
-
14
viewed：1
来源：ACS PublicationsChiral materials, integrating structural breaking of mirror-symmetry, exhibit physical properties that cannot be observed in centrosymmetric analogues. Among these properties, optical magneto-chiral anisotropy, the nonreciprocal absorption of light shown by chiral magnetized systems, is emerging as an enabling technology in magneto-optics and photonics. Here, we report on enantiopure chiral molecular crystals based on the erbium(III) rare-earth ion that display nonreciprocal, wavelength-selective, magnetic field-induced variations of the optical absorption coeffici...
Release time:
2026
-
10
-
13
viewed：1