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Epitaxial lift-off of electrodeposited single-crystal gold foils for flexible electronics

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Science  17 Mar 2017:
Vol. 355, Issue 6330, pp. 1203-1206
DOI: 10.1126/science.aam5830

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Lifting off gold films

A method for growing and removing single-crystal gold films can be used to create a flexible and transparent substrate for devices. Mahenderkar et al. grew gold films on the face of a silicon wafer and then used photoelectrochemistry to undergrow a sacrificial silicon dioxide layer. This layer allowed the gold film to be peeled off with adhesive tape. A 28-nm-thick gold foil showed a minimal increase in sheet electrical resistance after 4000 bending cycles. Flexible films of single-crystal cuprous oxide and of zinc oxide nanowires were then grown on the gold foils.

Science, this issue p. 1203