Understanding the Finite Size and Surface Relaxation Effects on the Surface States of Bi₂Se₃ Family Topological Insulators

The Journal of Physical Chemistry C, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 21, 2024

Topological insulators (TIs) of the Bi2Se3 family exhibit a topological phase transition from three-dimensional (3D) to two-dimensional (2D) TIs in thin films with decreasing thickness. Understanding driving force this is critical for applications nanodevices. Herein, we investigate finite-size effects on bulk band inversion and structural relaxation surface states within via first-principles calculations. Thin exposing three lowest-energy surfaces are modeled by 2D slabs tunable thicknesses. We propose that thickness dependence originates electron confinement created cuts. The increase film then counteracts these effects, resulting monotonically gap evaluated at spin–orbit decoupled level. This found be consistent various slabs. utilize relationship predict required maintaining 3D TI states. Our findings underscore importance delocalization determining films. In addition, actual manifestation side affected significantly coexisting dangling bonds produced Therefore, plays crucial role disentangling trivial nontrivial

Язык: Английский

Snowflake‐Like RuMn Branched Nanosheets Enable Topocatalytic Therapy of Cardiac Ischemia/Reperfusion Injury via Resisting Inflammatory Cascade and Neutrophil Invasion

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 10, 2024

Abstract Myocardial ischemia/reperfusion (I/R) injury is the main cause for limited response to treatment after clinical revascularization. The primary mechanisms are over production of reactive oxygen and nitrogen species (RONS) severe inflammatory response, leading irreversible damage cardiac tissue. Herein, this work proposes concept topocatalytic nanomedicine reports a distinctive class snowflake‐like ultrathin manganese‐doped ruthenium branched nanosheets with PEGylation (RuMn BNSP) that could overcome complex biological conditions attenuate myocardial I/R injury. RuMn BNSP mimic function antioxidative enzymes effectively scavenge RONS, thereby enabling excellent cellular protection against oxidative stress. In addition, in an oxidized environment, maintain mitochondrial by preventing membrane potential depolarization permeability transition pore opening. murine model, single intravenous bolus prevents recruitment neutrophils amplification responses tissue, reducing size infarction improving function. These findings validate rational design toxic RONS reduce neutrophil infiltration on injury, providing strong evidence application other stress‐related diseases.

Язык: Английский

Surface compositional modification of Weyl semimetal Co3Sn2S2(0001) from vacuum to electrochemical water splitting conditions

Applied Surface Science, Год журнала: 2024, Номер unknown, С. 162046 - 162046

Опубликована: Дек. 1, 2024

Язык: Английский