Defect Engineered Few Layered MoS2 for Human-Machine Interface

Raksha D. Salian

doi:10.1002/smtd.202500068

Defect Engineered Few Layered MoS2 for Human-Machine Interface

2025-03-27

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Chinmayee Chowde Gowda

Chandra Sekhar Tiwary *

P

Partha Kumbhakar *

DOI：10.1002/smtd.202500068

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Ultrasensitive flexible devices have huge applications in many areas, like healthcare monitoring, human-machine interaction, and wearable technology. However, improving the sensitivity of these devices is still challenging. In the current study, a flexible non-contact sensing system is designed with a human-machine interface using defect-engineered, few-layered Molybdenum disulfide (MoS2). The fabricated sensors show high sensitivity when monitoring proximity, humidity, and in-plane applied strain. The output performance demonstrates the influence of surface defects, which greatly impact the average surface charge of the nanosheets. The experimental measurements and in-detail density functional theoretical (DFT) calculation further reveal surface charge variations on the basal planes that correlate with topographic defects and increase sensitivity. The electrical signals for different gestures of human hands are used to illustrate the identification of multidirectional bending and sliding events. These findings will contribute to understanding the effect of surface defects that play an important role in sensing applications with human-machine interface.

Keywords:

2D MoS2

DFT

flexible sensors

proximity sensors

surface defects

Defect Engineered Few Layered MoS2 for Human-Machine Interface

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