In situ synthesis of 3D metal oxides/Ni3C on the macroporous electrically conductive network for enhanced electron field emission

作者：Han, Rui; Chen, Yuyao; Gu, Kaijie; Wu, Dajun^*; Zhao, Quanliang^*; Wang, Lianwei^*; Chu, Paul K.

来源：Materials Letters, 2022, 323: 132524.

DOI：10.1016/j.matlet.2022.132524

• Field emission
• Composite materials
• MECN
• Electrical properties

Three-dimensional metal oxides/Ni3C structures (TiO2/Ni3C, CuO/Ni3C, and WO3/Ni3C) are prepared in situ on the macroporous electrically conductive network (MECN) and the field emission (FE) characteristics are investigated systematically. The TiO2/Ni3C nanosheets deposited on MECN show the smallest turn-on and threshold fields of 1.30 V/mu m and 1.69 V/mu m, respectively, compared to CuO/Ni3C and WO3/Ni3C. The excellent FE properties of TiO2/Ni3C/MECN arise from the low work function and change in hybridization from sp(2) to sp(3) carbon atoms at the electron emission sites. In situ synthesis of TiO2/Ni3C is environmentally friendly, efficient, and compatible with microelectronics manufacturing boding well for application to high-performance FE and vacuum nanodevices.

• 单位
  北方工业大学