“…Zinc germanate (Zn 2 GeO 4 , ZGO), as an important ternary oxide with a wide bandgap of 4.68 eV, 7,8 has attracted great attention for various applications due to its interesting properties, such as alternatingcurrent thin-film electroluminescence devices, 9 long-lasting phosphorescence materials, 10 photocatalysts, [11][12][13][14] negative thermal expansion materials, 15 ultraviolet photodetectors, 16 and so forth. Recently, ZGO nanowires could be fabricated using many kinds of methods: submerging Zn-containing Ge nanoparticles in water, 17 chemical vapour transport method, 7,18 one-step thermal evaporation method, 19,20 and hydrothermal method. 21 In addition, many prototype devices based on ZGO nanowires have been fabricated.…”