02. Direct Growth of Ultrafast Transparent Single-Layer Graphene Defoggers英文教材.pdf

full papers www.MaterialsV Defogging Direct Growth of Ultrafast Transparent Single-Layer Graphene Defoggers Lifang Tan, Mengqi Zeng, Qiong Wu, Linfeng Chen, Jiao Wang, Tao Zhang, Jürgen Eckert, Mark H. Rümmeli, and Lei Fu* The idea fl at 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 fi lm are covered by water molecules which, in turn, leads to a temperature drop that is ineffi cient for fog removal. Here, the direct growth of large-area and continuous graphene fi lms on quartz is reported, and the fi rst 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 fi lms and the substrates, which prevents the permeation of water molecules. These directly