Transition of the Type of Band Alignments for All-Inorganic Perovskite van der Waals Heterostructures CsSnBr/WSSe.

In general, two-dimensional semiconductor-based van der Waals heterostructures (vdWHs) can be modulated to achieve the transition of band alignments (type-I, type-II, and type-III), which can be applied in different applications. However, it is rare in three-dimensional perovskite-based vdWHs, and it is challenging to achieve the tunable band alignments for a single perovskite-based heterostructure. Here, we systematically investigate the electronic and optical properties of all-inorganic perovskite vdWHs CsSnBr/WSSe based on density functional theory (DFT) calculation.

[Diagnostic value of chronotropic incompetence in coronary heart disease].

Objective: To determine the diagnostic value of chronotropic incompetence (CI) in coronary heart disease (CHD).

Methods: Two hundred thirty three patients who underwent the electrocardiogram treadmill exercise test (TET) and coronary angiography (CAG) were included in this study. CAG was used as the standard of diagnosing CHD.

[Different left ventricular geometric patterns and ambulatory pulse pressures in essential hypertensive patients].

Objective: To explore the relationship between different left ventricular geometric patterns and ambulatory pulse pressures in essential hypertension patients.

Methods: Left ventricular geometric patterns were identified according to the results of left ventricular mass index and relative left ventricular thickness assessed by echocardiography in 130 hypertension patients. The average levels of 24-hour pulse pressure, daytime pulse pressure, and nighttime pulse pressure were analyzed by ambulatory blood pressure monitoring.