Amorphous carbon interlayers for gold on elastomer stretchable conductors
| Autor: | C P Byrne, Dorian Dixon, Cristina Tuinea-Bobe, M U Manzoor, F. McKavanagh, Patrick Lemoine, Paul Maguire |
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| Přispěvatelé: | NIBEC, University of Ulster at Jordanstown |
| Rok vydání: | 2011 |
| Předmět: |
010302 applied physics
Materials science Acoustics and Ultrasonics Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Elastomer 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Secondary ion mass spectrometry Amorphous carbon X-ray photoelectron spectroscopy Electrical resistivity and conductivity Physical Sciences 0103 physical sciences Ultimate tensile strength Thin film Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Physics D: Applied Physics Journal of Physics D: Applied Physics, IOP Publishing, 2011, 44 (24), pp.245301. ⟨10.1088/0022-3727/44/24/245301⟩ |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/44/24/245301 |
| Popis: | Gold on polydimethylsiloxane (PDMS) stretchable conductors were prepared using a novel approach by interlacing an hydrogenated amorphous carbon (a-C : H) layer between the deposited metal layer and the elastomer. AFM analysis of the a-C : H film surface before gold deposition shows nanoscale buckling, the corresponding increase in specific surface area corresponds to a strain compensation for the first 4–6% of bi-axial tensile loading. Without this interlayer, the deposited gold films show much smaller and uni-directional ripples as well as more cracks and delaminations. With a-C : H interlayer, the initial electrical resistivity of the metal film decreases markedly (280-fold decrease to 8 × 10−6 Ω cm). This is not due to conduction within the carbon interlayer; both a-C : H/PDMS and PDMS substrates are electrically insulating. Upon cyclic tensile loading, both films become more resistive, but return to their initial state after 20 tensile cycles up to 60% strain. Profiling experiments using secondary ion mass spectroscopy and x-ray photoelectron spectroscopy indicate that the a-C : H layer intermixes with the PDMS, resulting in a graded layer of decreasing stiffness. We believe that both this graded layer and the surface buckling contribute to the observed improvement in the electrical performance of these stretchable conductors. |
| Databáze: | OpenAIRE |
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