Size-dependent rupture strain of elastically stretchable metal conductors

SCRIPTA MATERIALIA

卷:66

Article

Graudejus, O.¹  Jia, Zheng²  Li, Teng²  Wagner, S.³ 

[1] Arizona State Univ, Ctr Adapt Neural Syst, Dept Chem & Biochem, Tempe, AZ 85287 USA

[2] Univ Maryland, Maryland NanoCtr, Dept Mech Engn, College Pk, MD 20742 USA

[3] Princeton Univ, Princeton Inst Sci & Technol Mat, Dept Elect Engn, Princeton, NJ 08544 USA

关键词: Thin films;    Rupture strain;    Stretchable conductors;    Flexible electronics;   

DOI  :  10.1016/j.scriptamat.2012.02.034

来源: Elsevier

【 摘 要 】

Experiments show that the rupture strain of gold conductors on elastomers decreases for conductors that are long and narrow. Rupture is caused by the irreversible coalescence of microcracks into one long crack. A mechanics model identifies a critical crack length l(cr) above which the long crack propagates across the entire conductor width l(cr) depends on the fracture toughness of the gold film and the width of the conductor. The model provides guidance for the design of highly stretchable conductors. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free