Lee, Ji Yeong Seong, Won Kyung Choi, In-Suk Ghosh, Ranajay Vaziri, Ashkan Yang, Cheol-Woong Lee, Kwang-Ryeol Moon, Myoung-Woon 2024-01-20T07:03:06Z 2024-01-20T07:03:06Z 2021-09-04 2015-05-04 0021-8464 https://pubs.kist.re.kr/handle/201004/125458 We report the deformation behavior and mechanical properties of a polymeric micropillar, which measures approximately 10 mu m by 30 mu m in size by measuring the loading/unloading response using an in situ force measurement system. When the single poly(dimethylsiloxane) (PDMS) micropillar was subjected to compression, we observed a periodic wrinkle and global (Euler) buckling at the sidewall. During unloading, we found the pull-off force (adhesion force) to increase for higher values of preloading and also for lower loading/unloading rates. From the slope of the load-displacement curves measured in situ, we calculated the effective elastic stiffness of the PDMS micropillar to be about 2.03MPa. In addition to the current work, we report that this method can be used more broadly for in situ measurement of the intrinsic mechanical and adhesion properties of polymers and other relatively soft materials. English TAYLOR & FRANCIS LTD ASPECT RATIO SENSOR In situ Measurement of the Adhesion Strength and Effective Elastic Stiffness of Single Soft Micropillar Article 10.1080/00218464.2014.908123 1 JOURNAL OF ADHESION, v.91, no.5, pp.369 - 380 JOURNAL OF ADHESION 91 5 369 380 scie scopus 000344051900004 2-s2.0-84910095803 Engineering, Chemical Materials Science, Multidisciplinary Mechanics Engineering Materials Science Mechanics Article ASPECT RATIO SENSOR Polymers Microscopy Dry adhesion Mechanical properties of adhesives Dynamic mechanical analysis