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Full-Text Articles in Materials Chemistry
Metal-Interface-Elastomer (Mine) Structures For Stretchable Electronics, Tricia Carmichael, Akhil Vohra, Kory Schlingman, R. Stephen Carmichael
Metal-Interface-Elastomer (Mine) Structures For Stretchable Electronics, Tricia Carmichael, Akhil Vohra, Kory Schlingman, R. Stephen Carmichael
Chemistry and Biochemistry Publications
The future of soft, conformable, and robust wearable electronics will require elastomers to provide mechanical stabilization, a soft surface to interact with human wearers, and a crucial physical barrier to protect stretchable devices from the environment. It is a difficult challenge, however, for a single elastomer to fulfill each of these needs. Here, we present a new approach that fuses a membrane of poly(dimethylsiloxane) (PDMS) onto the surface of a transparent butyl rubber (T-IIR) substrate using an organosilane-based molecular glue. The resulting membrane-interface-elastomer (MINE) structures uniquely combine the surface chemistry of PDMS with the intrinsically low gas permeability of T-IIR …
Solution Deposition Of Conformal Gold Coatings On Knitted Fabric For E-Textiles And Electroluminescent Clothing, Tricia Carmichael, Yunyun Wu, Sara S. Mechael, Yiting Chen
Solution Deposition Of Conformal Gold Coatings On Knitted Fabric For E-Textiles And Electroluminescent Clothing, Tricia Carmichael, Yunyun Wu, Sara S. Mechael, Yiting Chen
Chemistry and Biochemistry Publications
The vision for wearable electronics involves creating an imperceptible boundary between humans and devices. Integrating electronic devices into clothing represents an important path to this vision; however, combining conductive materials with textiles is challenging due to the porous structure of knitted textiles. Stretchability depends on maintaining the void structure between the yarns of the fabric; filling these voids with conductive materials stiffens the textile and can lead to detrimental cracking. The authors demonstrate the solution-based metallization of a knitted textile that conformally coats individual fibers with gold, leaving the void structure intact. The resulting gold-coated textile is highly conductive, with …
Transparent, Stretchable, And Conductive Swnt Films Using Supramolecular Functionalization And Layer-By-Layer Self-Assembly, Tricia B. Carmichael, Akhil Vohra, R. Stephen Carmichael, Patigul Imin, Mokhtar Imit, Jagan Singh Meena, Alex Adronov
Transparent, Stretchable, And Conductive Swnt Films Using Supramolecular Functionalization And Layer-By-Layer Self-Assembly, Tricia B. Carmichael, Akhil Vohra, R. Stephen Carmichael, Patigul Imin, Mokhtar Imit, Jagan Singh Meena, Alex Adronov
Chemistry and Biochemistry Publications
We demonstrate films of single-walled carbon nanotubes (SWNTs) on the elastomer polydimethylsiloxane (PDMS) that are stretchable, conductive, and transparent. Our fabrication method uses the supramolecular functionalization of SWNTs with conjugated polyelectrolytes to generate aqueous dispersions of positively- and negatively-charged SWNTs, followed by layer-by-layer self-assembly onto a PDMS substrate. Adding bilayers of positively- and negatively-charged SWNTs to the surface causes the sheet resistance and the % transmittance of the film to both progressively decrease. The sheet resistance decreases sharply in the first five bilayers as the layer-by-layer process efficiently establishes the percolation network, whereas the % transmittance declines more gradually. Films …
Reinventing Butyl Rubber For Stretchable Electronics, Tricia B. Carmichael, Akhil Vohra, Heather L. Filiatrault, Stanley Amyotte, R. Stephen Carmichael, Natalie D. Suhan, Siegers Conrad, Lorenzo Ferrari, Gregory J E Davidson
Reinventing Butyl Rubber For Stretchable Electronics, Tricia B. Carmichael, Akhil Vohra, Heather L. Filiatrault, Stanley Amyotte, R. Stephen Carmichael, Natalie D. Suhan, Siegers Conrad, Lorenzo Ferrari, Gregory J E Davidson
Chemistry and Biochemistry Publications
The development of stretchable electronic devices that are soft and conformable has relied heavily on a single material – polydimethylsiloxane – as the elastomeric substrate. Although polydimethylsiloxane has a number of advantageous characteristics, its high gas permeability is detrimental to stretchable devices that use materials sensitive to oxygen and water vapor, such as organic semiconductors and oxidizable metals. Failing to protect these materials from atmosphere-induced decomposition leads to premature device failure; therefore, it is imperative to develop elastomers with gas barrier properties that enable stretchable electronics with practical lifetimes. Here, we reinvent butyl rubber – a material with an intrinsically …
Developing The Surface Chemistry Of Transparent Butyl Rubber For Impermeable Stretchable Electronics, Tricia Carmichael, Akhil Vohra, R. Stephen Carmichael
Developing The Surface Chemistry Of Transparent Butyl Rubber For Impermeable Stretchable Electronics, Tricia Carmichael, Akhil Vohra, R. Stephen Carmichael
Chemistry and Biochemistry Publications
Transparent butyl rubber is a new elastomer that has the potential to revolutionize stretchable electronics due to its intrinsically low gas permeability. Encapsulating organic electronic materials and devices with transparent butyl rubber protects them from problematic degradation due to oxygen and moisture, preventing premature device failure and enabling the fabrication of stretchable organic electronic devices with practical lifetimes. Here, we report a methodology to alter the surface chemistry of transparent butyl rubber to advance this material from acting as a simple device encapsulant to functioning as a substrate primed for direct device fabrication on its surface. We demonstrate a combination …
A Self-Assembled, Low-Cost, Microstructured Layer For Extremely Stretchable Gold Films, Tricia Carmichael, Heather L. Filiatrault, R. Stephen Carmichael, Rachel A. Boutette
A Self-Assembled, Low-Cost, Microstructured Layer For Extremely Stretchable Gold Films, Tricia Carmichael, Heather L. Filiatrault, R. Stephen Carmichael, Rachel A. Boutette
Chemistry and Biochemistry Publications
We demonstrate a simple, low-cost, and green approach to deposit a microstructured coating on the silicone elastomer polydimethylsiloxane (PDMS) that can be coated with gold to produce highly stretchable and conductive films. The microstructured coating is fabricated using an aqueous emulsion of poly(vinyl acetate) (PVAc): common, commercially available white glue. The aqueous glue emulsion self-assembles on the PDMS surface to generate clustered PVAc globules, which can be conformally coated with gold. The microstructured surface provides numerous defect sites that localize strain when the structure is stretched, resulting in the initiation of numerous microcracks. As the structure is further elongated, the …