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  1. The solution-processing of metal chalcogenides offers a promising route to improve the manufacturing of semiconductor devices. The amine–thiol solvent system has been deemed an “alkahest” for its ability to dissolve a wide range of metals and metal chalcogenides. Therefore, it enables convenient synthesis of metal sulfides. However, in the literature there are limited reports of analogous selenium-based “alkahest” chemistry. Here we show that solutions containing n-alkylammonium polyselenides can dissolve a wide range of metals and metal compounds through the formation of soluble metal polyselenides. These metal polyselenides can subsequently be utilized as precursors for the synthesis of a wide range of binary and multinary metal selenide thin films and nanoparticles, including Cu(In,Ga)Se2, Cu2ZnSnSe4, and Ag2ZnSnSe4. 
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    Free, publicly-accessible full text available October 10, 2024
  2. Abstract

    Research from the perspective of parents, educators and mental health professionals has documented the negative impacts of pandemic isolation on children, but few studies have sought children's own perspectives on this difficult year. The current study aims to provide a first‐person perspective on children's psychological health by asking children directly about their experiences of isolating at home. We interviewed 28 seven‐ to eleven‐year‐olds in early days of lockdowns with follow‐ups 6 months later. Children answered questions about family, school, friendships and feelings about the changes in their lives during lockdown. Children's reflections showed resilience, adaptability, positive appraisals and an ability to maintain meaningful social connections. This data underscores the value of including children's narratives to better understand the pandemic's lasting effects on their lives.

     
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