Axisymmetric thermo-mechanical analysis of laser-driven non-contact transfer printing

An axisymmetric thermo-mechanical model is developed for laser-driven non-contact transfer printing, which involves laser-induced impulsive heating to initiate separation at the interface between a soft, elastomeric stamp and hard micro/nanomaterials (i.e., inks) on its surface, due to a large mismatch in coefficients of thermal expansion. The result is the active ejection of the inks from the stamp, to a spatially Rui Li and Yuhang Li contributed equally to this work. R. Li · Y. Zhong Department of Engineering Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China R. Li · Y. Li · C. Lü · Y. Huang (B) Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA e-mail: [email protected] R. Li · Y. Li · C. Lü · Y. Huang Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA Y. Li · B. Fang School of Astronautics, Harbin Institute of Technology, Harbin 150001, China C. Lü Department of Civil Engineering, Soft Matter Research Center, Zhejiang University, Hangzhou 310058, China J. Song Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33146, USA separated receiving substrate, thereby representing the printing step. The model gives analytically the temperature field, and also a scaling law for the energy release rate for delamination at the interface between the stamp and an ink in the form of a rigid plate. The normalized critical laser pulse time for interfacial delamination depends only on the normalized absorbed laser power and width of the ink structure, and has been verified by experiments.