Fußnoten

• [1] Der glühelektrische Effekt ist eine von mehreren Arten, wie Elektronen aus Metallen austreten können: "Many different physical stimuli can supply this energy, including thermal-energy (coined as “thermion” emission by Thomas Edison in 1880), photons (the photoelectric effect made famous by Einstein), ion or electron bombardment, and large electric fields, which, unlike the others, allow electron tunneling toward the vacuum". In: Trucchi DM, Melosh NA. Electron-emission materials: Advances, applications, and models. MRS Bulletin. 2017;42(7):488-492. DOI: doi:10.1557/mrs.2017.142