pBn type short-wavelength infrared photodetector with an ultralow dark current and extended wavelength based on a strained InGaAs/GaAsSb superlattice.

An InGaAs/GaAsSb type II superlattice (T2SL) absorber is a promising alternative material for a short-wavelength infrared (SWIR) photodetector due to the largely tunable bandgap by adjusting the thickness and material composition of InGaAs and GaAsSb in each T2SL period. We demonstrate a pBn type SWIR photodetector consisting of a strained InGaAs/GaAsSb T2SL absorber and AlGaAsSb barrier. The device presents an ultralow dark current density of 1.

Electrochemical sensors of neonicotinoid insecticides residues in food samples: From structure to analysis.

Most food samples are detected positive for neonicotinoid insecticides, posing a severe threat to human health. Electrochemical sensors have been proven effective for monitoring the residues to guarantee food safety, but there needs to be more review to conclude the development status comprehensively. On the other hand, various modified materials were emphasized to improve the performance of electrochemical sensors in relevant reviews, rather than the reasons why they were selected.

Effect of Kegel Pelvic Floor Muscle Exercise Combined with Clean Intermittent Self-catheterization on urinary retention after radical hysterectomy for cervical cancer.

Objectives: To investigate the effect of Kegel pelvic floor muscle training combined with clean intermittent self-catheterization on patients with cervical cancer, and to analyze the risk factors affecting urinary retention.

Methods: A total of 166 patients with cervical cancer admitted to our hospital from October 2016 to December 2019, all of whom received radical resection of cervical cancer, were divided into two groups according to the random number table method: the observation group and the control group, with 83 cases in each group. The control group underwent clean intermittent self-catheterization, while the observation group underwent Kegel pelvic floor muscle exercise combined with clean intermittent self-catheterization.