Now showing items 1-20 of 70

    • 3D Printing of Transparent and Conductive Heterogeneous Hydrogel-Elastomer Systems 

      Tian, Kevin; Bae, Jinhye; Bakarich, Shannon E.; Yang, Canhui; Gately, Reece D.; Spinks, Geoffrey M.; in het Panhuis, Marc; Suo, Zhigang; Vlassak, Joost J. (Wiley-Blackwell, 2017)
      Hydrogel-based ionic devices represent an alternative approach to stretchable electronics through use of soft ionic conductors that are both highly stretchable and transparent. However, these devices require the integration ...
    • Brownian Motion of Molecular Probes in Supercooled Liquids 

      Liu, Qihan; Huang, Shicheng; Suo, Zhigang (American Physical Society (APS), 2015)
      When a supercooled liquid approaches glass transition, viscous flow slows down greatly, but often the Brownian motion of a molecular probe in the host liquid does not slow down as much, causing the Stokes-Einstein relation ...
    • Buckling Induced Functionality in Soft Structures 

      Liu, Jia (2016-04-18)
      A variety of instabilities can be triggered when elastic structures are subjected to mechanical loadings. While such instabilities have traditionally been considered as a failure, a new trend is emerging in which the ...
    • Buckling of Elastomeric Beams Enables Actuation of Soft Machines 

      Yang, Dian; Mosadegh, Bobak; Ainla, Alar; Lee, Ben Charles Germain; Khashai, Fatemeh; Suo, Zhigang; Bertoldi, Katia; Whitesides, George McClelland (Wiley-Blackwell, 2015)
      Soft, pneumatic actuators that buckle when interior pressure is less than exterior provide a new mechanism of actuation. Upon application of negative pneumatic pressure, elastic beam elements in these actuators undergo ...
    • Buckling Pneumatic Linear Actuators Inspired by Muscle 

      Yang, Dian; Verma, Mohit Singh; So, Ju-Hee; Mosadegh, Bobak; Keplinger, Christoph; Lee, Benjamin; Khashai, Fatemeh; Lossner, Elton Garret; Suo, Zhigang; Whitesides, George McClelland (Wiley-Blackwell, 2016)
      The mechanical features of biological muscles are difficult to reproduce completely in synthetic systems. A new class of soft pneumatic structures (vacuum-actuated muscle-inspired pneumatic structures) is described that ...
    • Charge localization instability in a highly deformable dielectric elastomer 

      Lu, Tongqing; Keplinger, Christoph; Arnold, Nikita; Bauer, Siegfried; Suo, Zhigang (AIP Publishing, 2014)
      This paper shows that a highly deformable capacitor made of a soft dielectric and two conformal electrodes can switch between two states discontinuously, by a first-order transition, as the total charge varies gradually. ...
    • Click Functionalized Polymeric Biomaterials for Tissue Engineering 

      Desai, Rajiv (2016-02-25)
      ECM-mimicking biomaterial research has driven numerous advances in tissue engineering in recent years, as new developments in polymer chemistry and cell-material interactions have allowed bioengineers to create complex ...
    • Controlled formation and disappearance of creases 

      Chen, Dayong; Jin, Lihua; Suo, Zhigang; Hayward, Ryan C. (Royal Society of Chemistry (RSC), 2014)
      Soft, elastic materials are capable of large and reversible deformation, readily leading to various modes of instability that are often undesirable, but sometimes useful. For example, when a soft elastic material is ...
    • Creases on the interface between two soft materials 

      Jin, Lihua; Chen, Dayong; Hayward, Ryan C.; Suo, Zhigang (Royal Society of Chemistry (RSC), 2014)
      Theory and experiment are presented to show that an interface between two soft materials under compression can form creases, a type of bifurcation distinct from wrinkles. While creases bifurcate from a state of flat ...
    • Cyclic performance of viscoelastic dielectric elastomers with solid hydrogel electrodes 

      Bai, Yuanyuan; Jiang, Yanhui; Chen, Baohong; Chiang Foo, Choon; Zhou, Yongcun; Xiang, Feng; Zhou, Jinxiong; Wang, Hong; Suo, Zhigang (AIP Publishing, 2014)
      Hydrogels containing electrolyte can work as ionic conductors to actuate dielectric elastomer (DE) artificial muscles. Based on a popular design of a circular actuator, we study theoretically and experimentally the cyclic ...
    • The Determination of the Location of Contact Electrification-Induced Discharge Events 

      Vella, Sarah J.; Chen, Xin; Thomas, Samuel W. III; Zhao, Xuanhe; Suo, Zhigang; Whitesides, George M. (American Chemical Society, 2010)
      This paper describes a method for determining the location of contact electrification-induced electrical discharges detected in a system comprising a steel sphere rolling in a circular path on an organic insulator. The ...
    • Dielectric elastomer actuators under equal-biaxial forces, uniaxial forces, and uniaxial constraint of stiff fibers 

      Lu, Tongqing; Huang, Jiangshui; Jordi, Christa; Kovacs, Gabor; Huang, Rui; Clarke, David R.; Suo, Zhigang (Royal Society of Chemistry, 2012)
      A membrane of a dielectric elastomer deforms when a voltage is applied through its thickness. The achievable voltage-induced deformation is strongly affected by how mechanical loads are applied. Large voltage-induced ...
    • Dielectric elastomer generator with equi-biaxial mechanical loading for energy harvesting 

      Huang, Jiangshui; Shian, Samuel; Suo, Zhigang; Clarke, David R. (Society of Photo-Optical Instrumentation Engineers (SPIE), 2013)
      Dielectric elastomer generators (DEGs) are attractive candidates for harvesting electrical energy from mechanical work since they comprise relatively few moving parts and large elastomer sheets can be mass produced. ...
    • Diffusion, Deformation, and Damage in Lithium-Ion Batteries and Microelectronics 

      Pharr, Matt Mathews (2014-06-06)
      This thesis explores mechanical behavior of microelectronic devices and lithium-ion batteries. We first examine electromigration-induced void formation in solder bumps by constructing a theory that couples electromigration ...
    • Discoveries in Phononic Crystals and Acoustic Metamaterials 

      Wang, Pai (2015-10-13)
      Phononic crystals and acoustic metamaterials are heterogeneous materials that enable manipulation of elastic waves. An important characteristic of these heterogeneous systems is their ability to tailor the propagation of ...
    • Elastic leak of a seal 

      Liu, Qihan; Wang, Zhengjin; Lou, Yucun; Suo, Zhigang (Elsevier BV, 2014)
      An elastomeric seal may leak by elastic deformation without any material damage. We describe elastic leak using a theoretical model, and watch a seal deform and leak using a transparent experimental setup. The elastomer ...
    • Electromechanical Catastrophe 

      Lu, Tongqing; Cheng, Sibo; Li, Tiefeng; Wang, Tiejun; Suo, Zhigang (World Scientific Pub Co Pte Lt, 2016)
      A transducer is a system that couples two loads. For example, an electromechanical transducer couples a mechanical force and an electrical voltage. A two-load, nonlinear system can exhibit rich behavior of bifurcation, ...
    • Electronic dura mater for long-term multimodal neural interfaces 

      Minev, I. R.; Musienko, P.; Hirsch, A.; Barraud, Q.; Wenger, N.; Moraud, E. M.; Gandar, J.; Capogrosso, M.; Milekovic, T.; Asboth, L.; Torres, R. F.; Vachicouras, N.; Liu, Q.; Pavlova, N.; Duis, S.; Larmagnac, A.; Voros, J.; Micera, S.; Suo, Zhigang; Courtine, G.; Lacour, S. P. (American Association for the Advancement of Science (AAAS), 2015)
      The mechanical mismatch between soft neural tissues and stiff neural implants hinders the long-term performance of implantable neuroprostheses. Here, we designed and fabricated soft neural implants with the shape and ...
    • Embracing Compliance and Instabilities to Achieve Function in Mechanical Metamaterials and Devices 

      Overvelde, Johannes (2016-04-26)
      The use of soft materials has led to the development of soft devices that have the potential to be more robust, adaptable, and safer for human interaction than traditional rigid systems. State-of-the-art developments push ...
    • Extrusion, slide, and rupture of an elastomeric seal 

      Wang, Zhengjin; Chen, Chao; Liu, Qihan; Lou, Yucun; Suo, Zhigang (Elsevier BV, 2017)
      Elastomeric seals are essential to two great technological advances in oilfields: horizontal drilling and hydraulic fracturing. This paper describes a method to study elastomeric seals by using the pressure-extrusion curve ...