Fig. 10. Strain sensors, SHG-based strain mapping, and broad-spectrum solar energy funnel.

a Schematic of a PDMS fiber incorporating graphene nanocomposites (top panel) and photographs of the hybrid fiber in the original state and tensile state (bottom panel)¹³³. b Strain-dependent optical loss of the fiber in a (top panel) and that measured with the movement of the human body (bottom panel)¹³³. c Strain mapping in MoS₂ by SHG spectroscopy. The inset shows an SEM micrograph of the sample⁸¹. (Scale bars in both images are 1 μm.) d Cross-sectional SEM micrograph of silica nanocones on a SiO₂/Si substrate (Scale bar is 500 nm)¹³⁴. e STM topography of a single MoS₂ “artificial atom” consisting of monolayer MoS₂ supported by a single silica nanocone (Scale bar is 100 nm)¹³⁴. f Calculated local strain distribution in strain-textured MoS₂ on the nanocone substrate, and g its PL peak intensity map¹³⁴. The scale bar in g is 1 μm. Adapted a and b from ref. ¹³³. Published by MDPI AG. Reprinted c with permission from ref. ⁸¹. Copyright (2018) Springer Nature. Adapted d–g with permission from ref. ¹³⁴. Copyright (2015) Springer Nature