材料科学
复合材料
弯曲
极限抗拉强度
张力(地质)
激光器
碳化
压缩(物理)
基质(水族馆)
变形(气象学)
碳纤维
扫描电子显微镜
光学
复合数
海洋学
物理
地质学
作者
Marco Hepp,Huize Wang,Katharina Derr,Simon Delacroix,Sebastian Ronneberger,Felix F. Loeffler,Benjamin Butz,Volker Strauß
标识
DOI:10.1038/s41528-022-00136-0
摘要
Abstract We describe the mechanical properties of turbostratically graphitized carbon films obtained by carbon laser-patterning (CLaP) and their application as bending or mechanical pressure sensors. Stable conductive carbonized films were imprinted on a flexible polyethylene terephthalate (PET) substrate by laser-induced carbonization. After initial gentle bending, i.e. training, these sponge-like porous films show a quantitative and reversible change in resistance upon bending or application of pressure in normal loading direction. Maximum response values of Δ R / R 0 = 388% upon positive bending (tensile stress) and −22.9% upon negative bending (compression) are implicit for their high sensitivity towards mechanical deformation. Normal mechanical loading in a range between 0 and 500 kPa causes a response between Δ R / R 0 = 0 and −15%. The reversible increase or decrease in resistance is attributed to compression or tension of the turbostratically graphitized domains, respectively. This mechanism is supported by a detailed microstructural and chemical high-resolution transmission electron microscopic analysis of the cross-section of the laser-patterned carbon.
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