A highly flexible and sensitive piezoresistive sensor based on MXene with greatly changed interlayer distances
Высокогибкий и чувствительный пьезорезистивный сенсор на основе MXene с существенно изменяющимися межслоевыми расстояниями
2017-10-25
SCID: 54.1/wvft5bes
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MXenegauge factorin situ transmission electron microscopyinterlayer distancepiezoresistive sensor
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Abstract (AI)
Since the successful synthesis of the first MXenes, application developments of this new family of two-dimensional materials on energy storage, electromagnetic interference shielding, transparent conductive electrodes and field-effect transistors, and other applications have been widely reported. However, no one has found or used the basic characteristics of greatly changed interlayer distances of MXene under an external pressure for a real application. Here we report a highly flexible and sensitive piezoresistive sensor based on this essential characteristics. An in situ transmission electron microscopy study directly illustrates the characteristics of greatly changed interlayer distances under an external pressure, supplying the basic working mechanism for the piezoresistive sensor. The resultant device also shows high sensitivity (Gauge Factor ~ 180.1), fast response (<30 ms) and extraordinarily reversible compressibility. The MXene-based piezoresistive sensor can detect human being's subtle bending-release activities and other weak pressure.
Key Findings
1
A piezoresistive sensor exploits MXene’s strongly pressure-dependent interlayer distances, a previously unused characteristic for applications.
2
In situ transmission electron microscopy directly visualizes substantial MXene interlayer-distance changes under external pressure, establishing the sensor’s working mechanism.
3
The device exhibits extraordinarily reversible compressibility and high flexibility.
4
The resulting MXene sensor combines high sensitivity, with a gauge factor of approximately 180.1, and a response time below 30 ms.
5
The sensor detects subtle human bending–release activities and other weak pressures.
Research Object
MXene-based piezoresistive sensor
Research Subject
The sensor’s pressure-induced interlayer-distance changes and resulting piezoresistive performance, including sensitivity, response speed, reversible compressibility, and detection of weak pressure and subtle bending-release activities
Publication Details
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2017-10-25
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