A secondary method for modulation of the sensitivity in silver nanowire (AgNW) resistive-type strain sensors without the need to change the material or coating process in the sensory layer is demonstrated. Instead of using a planar elastomer (polydimethylsiloxane is used in this study) substrate, diverse relief structures are introduced to induce nonuniform and complex strain within the elastic substrate and thereby different distributions of the crack density of the AgNWs upon stretching, which plays an important role in the modulation of the gauge factor (GF). Analysis of the sensory layer and mechanical studies reveal that a lower height ratio and greater number of trenches enhance the sensor sensitivity, for example, reaching a GF of 926 at 9.6% in this study. The demonstration of wrist-motion sensors using the technology illustrates the feasibility of using relief structures for various types of sensors and sensitivity ranges using an identical sensor layer.

In article number https://doi.org/10.1002/smll.201700070, Sung‐Hoon Choa, Heung Cho Ko, and co‐workers, demonstrate a secondary method to control the sensitivity of silver nanowire resistive‐type strain sensors with an identical sensory layer. The introduction of a diverse relief structure in the elastomer substrate enhances gauge factor through a different crack density in the sensory layer caused by non‐uniform strain distribution.