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Award Abstract #1301335

Adhesion Mechanics of Bio-Electronics Interface

Div Of Civil, Mechanical, & Manufact Inn
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Initial Amendment Date: February 12, 2013
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Latest Amendment Date: February 12, 2013
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Award Number: 1301335
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Award Instrument: Standard Grant
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Program Manager: Kara Peters
CMMI Div Of Civil, Mechanical, & Manufact Inn
ENG Directorate For Engineering
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Start Date: June 1, 2013
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End Date: May 31, 2016 (Estimated)
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Awarded Amount to Date: $360,780.00
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Investigator(s): Nanshu Lu nanshulu@utexas.edu (Principal Investigator)
Kenneth Liechti (Co-Principal Investigator)
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Sponsor: University of Texas at Austin
101 E. 27th Street, Suite 5.300
Austin, TX 78712-1532 (512)471-6424
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NSF Program(s): Mechanics of Materials and Str
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Program Reference Code(s): 022E, 024E, 9102, 9161, AMPP
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Program Element Code(s): 1630


The research objective of this proposal is to measure and model the native interfacial adhesion between polymers or metal coated polymers and bio-tissues using a contact mechanics approach. Bio-integrated electronics are a class of ultra-thin, ultra-soft, stretchable electronics which can conformably integrate with the soft, curvilinear and kinetic surfaces of bio-tissues for sensing, treatment, and communication. Conformable and robust binding between bio-tissues and electronics components can be obtained directly by such intrinsic adhesive interactions without recourse to intermediate adhesives or conductive gels. The proposed research will initiate a contact mechanics approach pertinent to bio-tissues through a combination of experiments and analytical/numerical modeling. We propose to develop a custom tissue tack tester capable of displacement control, measurement of contact load, and in situ monitoring of the contact area. Experimental data will be used in conjunction with contact mechanics models to determine the work of adhesion and traction-separation relations as the continuum representation of the adhesive interactions between various biotic-abiotic contact pairs. The effects of rate-dependence, tissue roughness, and bio-fluids will be considered.

Native adhesive interactions between electronic materials and bio-tissues as characterized by this research will be the key parameter in predicting interface reliability and in guiding the rational design of the mechanical structure of bio-integrated circuits. Outcomes from the proposed research will be assimilated into a new graduate level, school-wide, multidisciplinary course. Texas demographics are such that the undergraduate body at UT-Austin has a significant Hispanic representation (~17% in the Cockrell School of Engineering), who we have successfully encouraged to participate in our undergraduate outreach programs. The PI is a committee member of the UT Austin Women in Engineering Programs (WEP) and has dedicated herself as a mentor for underrepresented undergraduate and K-12 students.


Nanshu Lu, Dae-Hyeong Kim. "Flexible and Stretchable Electronics Paving the Way
for Soft Robotics," Soft Robotics, v.1, 2013, p. 53.

Donghee Son, Jongha Lee, Dong Jun Lee, Roozbeh Ghaffari, Seok Joo Kim, Ji Eun Lee, Soonho Yoon, Shixuan Yang, Seunghyun Lee, Shutao Qiao, Hye Rim Cho, Jun-Kyul Song, Jaemin Kim, Nohyun Lee, Cheol Seong Hwang, Nanshu Lu, Taeghwan Hyeon, Seung Hong Choi, Da. "Instrumented Bioresorbable Stent with Integrated Sensing, Data Storage and Nanoparticle Therapy," ACS Nano, 2015.

Moon Kee Choi, Ok Kyu Park, Changsoon Choi, Shutao Qiao, Roozbeh Ghaffari, Jaemin Kim, Dongjun Lee, Myungbin Kim, Wonji Hyun, Seok Joo Kim, Hye Jin Hwang, Seung-Hae Kwon, Taeghwan Hyeon, Nanshu Lu, Dae-Hyeong Kim. "Cephalopod-Inspired Miniaturized Suction Cups for Smart Medical Skin," Advanced Healthcare Materials, 2015.

Seok Joo Kim, Hye Rim Cho, Kyoung Won Cho, Shutao Qiao, Jung Soo Rhim, Min Soh, Taeho Kim, Moon Kee Choi, Changsoon Choi, Inhyuk Park, Nathaniel S. Hwang, Taeghwan Hyeon, Nanshu Lu, Seung Hong Choi, Dae-Hyeong Kim. "Multifunctional Cell-Culture Platform for Aligned Cell Sheet Monitoring, Transfer Printing, and Therapy," ACS Nano, 2015.


Please report errors in award information by writing to: awardsearch@nsf.gov.



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