Soft ionization mechanisms in flexible µ-tube plasma—from FµTP to closed µ-tube plasma. - Speicher, Luisa; Song, Hao; Ahlmann, Norman; Foest, Daniel; Höving, Simon; Brandt, Sebastian; Niu, Guanghui; Franzke, Joachim; Tian, Caiyan (Analytical & Bioanalytical Chemistry, 2024)