Highly Stretchable and Reliable, Transparent and Conductive Entangled Graphene Mesh Networks

• DOI: 10.1002/adma.201704626
• Publication Date: 2017-12-05T10:36:37Z
• Authors: Jaehyun Han; Jun‐Young Lee; Jihye Lee; Jong‐Souk Yeo
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract A highly stretchable and reliable, transparent conductive entangled graphene mesh network (EGMN) exhibits an interconnected percolation network, as usually shown in 1D nanowires, but with the electrical, mechanical, thermal properties of 2D graphene. The unique combination material structure wrinkled, waved, crumpled enables EGMN to demonstrate excellent electrical reliability, mechanical durability, stability, even under harsh environmental external conditions such very high temperature, humidity, bending, stretching. Specifically, after 100 000 cycles bending radius 2 mm, maintains its resistance similar initial value. shows a steady monotonic response strain 50 times nearly constant gauge factors 0.76, 1.67, 2.55 at 10%, 40%, 70% strains, respectively. Moreover, little change temperature increasing up 1000 °C, by situ analysis transmission electron microscopy also long‐term stability testing 70 °C relative humidity for 30 d. These results that this novel can significantly broaden application areas various types wearable devices.