Direct Growth of Ultrafast Transparent Single-Layer Graphene Defoggers

作者：Tan Lifang; Zeng Mengqi; Wu Qiong; Chen Linfeng; Wang Jiao; Zhang Tao; Eckert Juergen; Ruemmeli Mark H; Fu Lei^*

来源：Small, 2015, 11(15): 1840-1846.

DOI：10.1002/smll.201402427

• single-layer graphene
• graphene
• defogging
• defoggers
• direct growth
• transparent materials

The idea flat surface, superb thermal conductivity and excellent optical transmittance of single-layer graphene promise tremendous potential for graphene as a material for transparent defoggers. However, the resistance of defoggers made from conventional transferred graphene increases sharply once both sides of the film are covered by water molecules which, in turn, leads to a temperature drop that is inefficient for fog removal. Here, the direct growth of large-area and continuous graphene films on quartz is reported, and the first practical single-layer graphene defogger is fabricated. The advantages of this single-layer graphene defogger lie in its ultrafast defogging time for relatively low input voltages and excellent defogging robustness. It can completely remove fog within 6 s when supplied a safe voltage of 32 V. No visible changes in the full defogging time after 50 defogging cycles are observed. This outstanding performance is attributed to the strong interaction forces between the graphene films and the substrates, which prevents the permeation of water molecules. These directly grown transparent graphene defoggers are expected to have excellent prospects in various applications such as anti-fog glasses, auto window and mirror defogging.

• 出版日期2015-4-17
• 单位武汉大学