Details

Autor(en) / Beteiligte

• JK O'Neill, Stephen
• Gong, Huaxin
• Matsuhisa, Naoji
• Chen, Shucheng
• Moon, Hanul
• Wu, Hung‐Chin
• Chen, Xianfeng
• Chen, Xiaodong
• Bao, Zhenan

Titel

A Carbon Flower Based Flexible Pressure Sensor Made from Large‐Area Coating

Ist Teil von

• Advanced materials interfaces, 2020-09, Vol.7 (18), p.n/a

Ort / Verlag

Weinheim: John Wiley & Sons, Inc

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Flexible pressure sensors are an essential part of robotic skin for human–machine interfaces, wearables, and implantable biomedical devices. However, the desirable characteristics of high sensitivity, conformability, and good scalability are often mutually exclusive. Here, a highly sensitive and flexible pressure sensor that can be easily fabricated by coating a carbon flower and elastomer composite is presented. The composite made from uniform‐sized carbon flower particles exhibits a contact‐based mechanism for pressure sensing, as opposed to typical carbon black pressure sensitive composites which utilize percolation as the sensing mechanism. The contact mechanism allows for an active layer down to 13 µm, and a bending insensitivity down to a 5.5 mm bending radius, while maintaining a high sensitivity. Furthermore, the composite is printed over a large 1 m × 2 cm pressure sensing area, showing the preparation of this sensor can be scaled to large area. A new type of composite pressure sensor is demonstrated using 3D carbon materials with flower‐like superstructures embedded in an elastomer matrix. The novel contact‐based pressure sensing mechanism allows for a thickness and bending insensitive active layer that can be printed in large area, which is highly suitable for human–machine interfaces and large‐area electronic skin applications.