Analysis of Nanowire pn-Junction with Combined Current-Voltage, Electron-Beam-Induced Current, Cathodoluminescence, and Electron Holography Characterization.

We present the characterization of a pn-junction GaAs nanowire. For the characterization, current-voltage, electron-beam-induced current, cathodoluminescence, and electron holography measurements are used. We show that by combining information from these four methods, in combination with drift-diffusion modelling, we obtain a detailed picture of how the nanowire pn-junction is configured and how the recombination lifetime varies axially in the nanowire.

Infants' and toddlers' digital media use and mothers' mental health: A comparative study before and during the COVID-19 pandemic.

This study compared children's and mothers' digital media use and mothers' mental health in two samples: one accessed before (Group 1; N = 257; M = 33.18 years; SD = 4.79) and the other accessed during (Group 2; N = 256; M = 33.

Symptoms of Common Mental Disorders in Brazilian Parents During the COVID-19 Pandemic: Associated Factors.

COVID-19 pandemic has become a significant international public health problem. In addition to dealing with the pandemic's impact on mental health, parents need to cope with specific changes in their routines caused by social distance measures. This study aimed to investigate common mental disorders (CMD) symptoms in Brazilian parents during the COVID-19 pandemic and its associated factors.

Excitonic Diffusion in InGaN/GaN Core-Shell Nanowires.

We report on the direct observation of the diffusion of carriers in graded InGaN/GaN quantum wells in a nanowire. By probing the local dynamics at the nanoscale, along the wire for different temperatures between 4 and 250 K, we conclude that this diffusion process is thermally activated. In addition, the analysis of the cathodoluminescence lifetime for different temperatures shows that the carrier motion is isotropic and does not follow the indium gradient.