Trained laser-patterned carbon as high-performance mechanical sensors

作     者：Marco Hepp Huize Wang Katharina Derr Simon Delacroix Sebastian Ronneberger Felix F.Loeffler Benjamin Butz Volker Strauss 

作者机构：Micro‐and Nanoanalytics GroupUniversity of SiegenPaul‐Bonatz Str.9–11Siegen 57076Germany Max Planck Institut für Kolloid-und GrenzflächenforschungAm Mühlenberg 114476 PotsdamGermany LPICMCNRS UMR 7647Ecole polytechniqueInstitut Polytechnique de ParisPalaiseau 91128France 

出 版 物：《npj Flexible Electronics》 (npj-柔性电子（英文）)

年 卷 期：2022年第6卷第1期

页      面：36-44页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：support from the Fonds der Chemischen Industrie and the Max Planck Society 

主　　题：resistance bending carbon 

摘      要：We describe the mechanical properties of turbostratically graphitized carbon films obtained by carbon laser-patterning(CLaP)and their application as bending or mechanical pressure *** conductive carbonized films were imprinted on a flexible polyethylene terephthalate(PET)substrate by laser-induced *** initial gentle bending,***,these spongelike porous films show a quantitative and reversible change in resistance upon bending or application of pressure in normal loading *** response values ofΔR/R0=388%upon positive bending(tensile stress)and−22.9%upon negative bending(compression)are implicit for their high sensitivity towards mechanical *** mechanical loading in a range between 0 and 500 kPa causes a response betweenΔR/R_(0)=0 and−15%.The reversible increase or decrease in resistance is attributed to compression or tension of the turbostratically graphitized domains,*** mechanism is supported by a detailed microstructural and chemical high-resolution transmission electron microscopic analysis of the cross-section of the laserpatterned carbon.