Water-processed carbon nanotube/graphene hybrids with enhanced field emission properties

作者：Song, Meng; Xu, Peng; Song, Yenan; Wang, Xu; Li, Zhenhua; Shang, Xuefu; Wu, Huizhen; Zhao, Pei; Wang, Miao^*

来源：AIP Advances, 2015, 5(9): 097130.

DOI：10.1063/1.4930966

• GRAPHENE OXIDE
• NANOTUBES
• FILMS

Integrating carbon nanotubes (CNTs) and graphene into hybrid structures provides a novel approach to three dimensional (3D) materials with advantageous properties. Here we present a water-processing method to create integrated CNT/graphene hybrids and test their field emission properties. With an optimized mass ratio of CNTs to graphene, the hybrid shows a significantly enhanced field emission performance, such as turn-on electric field of 0.79V/mu m, threshold electric field of 1.05V/mu m, maximum current density of 0.1 mA/cm(2), and field enhancement factor of similar to 1.3 x 10(4). The optimized mass ratio for field emission emphasizes the importance of both CNTs and graphene in the hybrid. We also hypothesize a possible mechanism for this enhanced field emission performance from the CNT/graphene hybrid. During the solution treatment, graphene oxide behaves as surfactant sheets for CNTs to form a well dispersed solution, which leads to a better organized 3D structure with more conducting channels for electron transport.

• 出版日期2015-9
• 单位江苏大学; 浙江大学