Large and Pressure-Dependent Axis Piezoresistivity of Highly Oriented Pyrolytic Graphite near Zero Pressure.

The axis piezoresistivity is a fundamental and important parameter of graphite, but its value near zero pressure has not been well determined. Herein, a new method for studying the axis piezoresistivity of van der Waals materials near zero pressure is developed on the basis of scanning electron microscopy and finite element simulation. The axis piezoresistivity of microscale highly oriented pyrolytic graphite (HOPG) is found to show a large value of 5.

An Overstretch Strategy to Double the Designed Elastic Stretchability of Stretchable Electronics.

Achieving or enhancing the elastic stretchability of inorganic stretchable electronics is critically significant. However, only two types of fundamental strategies-using the prestrained elastic substrate and designing the geometric layouts-are exploited thus far. This study proposes a third strategy, an overstretch strategy, applied beyond the designed elastic range of stretchable structures after transfer printing and bonding to a soft substrate.