A method for forming efficient, ultrathin GaN light-emitting diodes (LEDs) and for their assembly onto foreign substances is reported. The LEDs have lateral dimensions ranging from ~1 mm × 1 mm to ~25 μm × 25 μm. Quantitative experimental and theoretical studies show the benefits of small device geometry on thermal management, for both continuous and pulsed-mode operation, the latter of which suggests the potential use of these technologies in bio-integrated contexts.

A highly elastic skin-like capacitive pressure sensor array ensuring electrical and mechanical robustness based on a thin all-elastomeric platform is presented.

Internal tapered conical connection demonstrated a varying amount of axial displacement with tightening torque and cyclic loading.

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