FlexibleElectronics with NanoManufacturing

Professor Yonggang，Huang's Mechanics of Materials Research Group at Northwestern University

（From EMI News）

Goals: To develop mechanics models for advanced technology (e.g., transfer printing, stretchable electronics, flexible silicon solar cell, electronic‐eye camera)
Rationale: Advanced technologies have many important applications to infrastructures, such as stretchable electronics for reliability assessment, flexible and transparent silicon solar cells for energy efficiency. Mechanics plays a critical role in the development of the scientific and engineering foundations for these advanced technologies. One example is high performance electronics and optoelectronic systems that are reversibly stretchable/compressible. These systems combine high quality electronic materials, such as aligned arrays of silicon nanoribbons and other inorganic nanomaterials, with ultrathin and elastomeric substrates, in multilayer neutral mechanical plane designs and with ‘wavy’ structural layouts. Such approaches, guided by detailed mechanics models, enable diverse classes of integrated circuits as well as highly integrated optoelectronics systems with well‐developed electronic materials, whose intrinsic brittle, fragile mechanical properties would otherwise preclude their use in such applications. Analytical and finite element method simulations of the mechanics play a central role in the development, not only to reveal the fundamental physics, but also to provide a set of practical strategies for the construction of the devices.
Research Topics:
• Mechanics of stretchable electronics
• Mechanics of flexible silicon solar cells
• Mechanics of transfer printing
People:
• Northwestern University: Professor Yonggang Huang (y‐huang@northwestern.edu), Jianliang Xiao, Shuodao Wang, and Dr. Jian Wu
• University of Illinois: Professor John Rogers (jrogers@illinois.edu) and Duc Ngo• University of Miami: Professor Jizhou Song (jsong8@miami.edu)
• Inst. of High Performance Computing (Singapore): Professor Yongwei Zhang (zhangyw@ihpc.astar. edu.sg) and Zhuangjian Liu• Tsinghua University (China): Professors Xue Feng (fengxue@tsinghua.edu.cn), Daining Fang (fangdn@tsinghua.edu.cn), and Keh‐Chih Hwang (huangkz@tsinghua.edu.cn)
• King Abdullah University of Sci. & Tech. (Saudi Arabia): Dr. Chun Lu (luc@kaust.edu.sa)
Selected Publications:
• Khang, Jiang, Huang, and Rogers, “A stretchable form of single crystal silicon for high performance electronics on rubber substrates,” Science 311, 208‐212, 2006.
• Meitl, Zhu, Kumar, Lee, Feng, Huang, Adesida, Nuzzo, and Rogers, “Transfer printing by kinetic control of adhesion to an elastomeric stamp,” Nature Materials, v 5, pp 33‐38, 2006.• Sun, Choi, Jiang, Huang, and Rogers, “Controlled buckling of semiconductor nanoribbons for stretchable electronics,” Nature Nanotechnology 1, 201‐207, 2006.
• Jiang, Khang, Song, Sun, Huang, and Rogers, “Finite deformation mechanics in buckled thin films on compliant supports,” Proceedings of the National Academy of Science of the United States of America 104, 15607‐15612, 2007.
• Jiang, Khang, Fei, Kim, Huang, Xiao, and Rogers, “Finite width effect of thin films buckling on compliant substrate: Experimental and theoretical studies,” Journal of the Mechanics and Physics of Solids 56, 2585‐2598, 2008.
• Kim, Ahn, Choi, Kim, Kim, Song, Huang, Liu, Lu, and Rogers, ”Stretchable and foldable silicon integrated circuits,” Science 320, 507‐511, 2008.
• Kim, Song, Choi, Kim, Kim, Liu, Huang, Hwang, Zhang, and Rogers, ”Materials and non‐coplanar mesh designs for integrated circuits with linear elastic responses to extreme mechanical deformations,” Proceedings of the National Academy of Sciences of the United States of America 105, 18675‐18680, 2008.
• Ko, Stoykovich, Song, Malyarchuk, Choi, Yu, Geddes, Xiao, Wang, Huang, and Rogers, ”A hemispherical electronic eye camera based on compressible silicon optoelectronics,” Nature 454, 748‐753, 2008.
• Yoon, Baca, Park, Paulius, Geddes, Li, Kim, Xiao, Wang, Kim, Motala, Ahn, Duoss, Lewis, Nuzzo, Ferreira, Huang, Rockett, and Rogers, “Flexible arrays of monocrystalline silicon solar cells for micro‐optic concentrator designs,” Nature Materials 7, 907‐915, 2008.