Prof. Cunjiang Yu Profile

Prof. Cunjiang Yu

at Univ of Houston

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Proceedings Article | 10 May 2024 Presentation

Rubbery bioelectronics

Cunjiang Yu

Proceedings Volume PC12948, PC129480Y (2024) https://doi.org/10.1117/12.3012031

KEYWORDS: Tissues, Semiconductors, Dielectrics, Deformation, Therapeutics, Stretchable circuits, Modulation, Medical diagnostics, Elasticity

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Electronics that can seamlessly integrate with soft organs could have significant impact in medical diagnostic, therapeutics. However, seamless integration is a grand challenge because of the distinct nature between electronics and human body. Conventional electronics are rigid and planar, made out of rigid materials. Human body are soft, deformable, comprised of biological materials, organs and tissues. This talk will introduce our solution to address the challenge through the recent development rubbery electronics, which is constructed all based on elastic rubber electronic materials of semiconductors, conductors and dielectrics, which possesses tissue-like softness and mechanical stretchability to allow seamless integration with soft deformable tissues and organs. Rubbery electronic materials (semiconductors, conductors, dielectrics) and device innovations set the foundation. This presentation will describe the development the recent advances of rubbery electronics and rubbery bioelectronics. As a platform technology, rubbery electronics could address many challenges in biomedical research and clinical studies.

Proceedings Article | 13 May 2019 Paper

Fully rubbery stretchable electronics, sensors, and smart skins

Cunjiang Yu

Proceedings Volume 10982, 109821O (2019) https://doi.org/10.1117/12.2518728

KEYWORDS: Sensors, Transistors, Semiconductors, Skin, Resistance, Stretchable circuits, Composites, Temperature sensors, Logic devices, Active remote sensing

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A general strategy to impart mechanical stretchability to stretchable electronics involves engineering materials into special architectures to accommodate or eliminate the mechanical strain in nonstretchable electronic materials while stretched. We introduce an all solution–processed type of electronics and sensors that are rubbery and intrinsically stretchable as an outcome from all the elastomeric materials in percolated composite formats with P3HT-NFs [poly(3-hexylthiophene-2,5- diyl) nanofibrils] and AuNP-AgNW (Au nanoparticles with conformally coated silver nanowires) in PDMS (polydimethylsiloxane). Rubbery sensors, which include strain, pressure, and temperature sensors, show reliable sensing capabilities and are exploited as smart gloves that enable gesture translation and smart skins with temperature sensing capability for robotics. Transistors and their arrays fully based on intrinsically stretchable electronic materials were developed, and they retained electrical performances without substantial loss when subjected to 50% stretching. Fully rubbery integrated electronics and logic gates were developed, and they also functioned reliably upon mechanical stretching. A rubbery active matrix based elastic tactile sensing skin to map physical touch was demonstrated to illustrate one of the applications.

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