Programmable patterned MoS2 film by direct laser writing for health-related signals monitoring

Abstract

Summary The two-dimensional (2D) transition metal dichalcogenides (TMDs) are promising flexible electronic materials for strategic flexible information devices. Large-area and high-quality patterned materials were usually required by flexible electronics due to the limitation from the process of manufacturing and integration. However, the synthesis of large-area patterned 2D TMDs with high quality is difficult. Here, an efficient and powerful pulsed laser has been developed to synthesize wafer-scale MoS 2 . The flexible strain sensor was fabricated using MoS 2 and showed high performance of low detection limit (0.09%), high gauge factor (1,118), and high stability (1,000 cycles). Besides, we demonstrated its applications in real-time monitoring of health-related physiological signals such as radial artery pressure, respiratory rate, and vocal cord vibration. Our findings suggest that the laser-assisted method is effective and capable of synthesizing wafer-scale 2D TMDs, which opens new opportunities for the next flexible electronic devices and wearable health monitoring.

Highly stable, stretchable, and versatile electrodes by coupling of NiCoS nanosheets with metallic networks for flexible electronics

“…These characteristics have motivated us to explore the versatility of Ag@NC NWs-NCS electrodes. 6,64 The sensing performance of flexible capacitive pressure sensors is realized by detecting the capacitance changes (ΔC = C − C 0 ) in response to external stimuli (P). A high-performance capacitive sensor should exhibit high sensitivity (S = δ(ΔC/C 0 )/δP), wide detection range, fast response, and excellent durability.…”

Nanopatterning Technologies of 2D Materials for Integrated Electronic and Optoelectronic Devices

“…[ 152,153 ] By using thermal oxidation and sublimation at highly localized thermal plasma hot spots, high‐resolution patterning of graphene and MoS 2 monolayers is successfully fabricated with low optical power (6.4 mW µm –2 ). [ 150 ]…”

Site-selective growth of two-dimensional materials: strategies and applications

“…Xu et al achieved wafer-scale programmable patterned MoS 2 by a similar direct laser writing method. 109 2.2.5 Other methods. Besides the methods mentioned above, there are several other techniques used to introduce nucleation sites.…”

“…Xu et al achieved wafer-scale programmable patterned MoS 2 by a similar direct laser writing method. 109…”