Abstract
Manufacturing Graphene and Graphene-based Nanocomposite for Piezoelectric Pressure Sensor Application: A Review
Highlights
In 1856, the scientist Thompson explained the piezeoresitive behavior of iron and copper for the first time and showed that the resisting of these metals changed with the change of elongation
The gauge factor is very important to measure sensitivity [piezeoresitive] of sensors as a result mechanical strain it is a measures of electrical shift sensitivity
The change in relative resistance to mechanical stress is defined as the change in mechanical resistance and applied strain. The change in this resistance (ΔR) depends on geometric shape and resistivity R [3]: (ΔR/R) = (1 + 2v) + Δρ/ρ. This can be proven from the equation, which states that the geometrical distortion effect produces GF from 1.4 to 2, whereas the resistance changes in metals Δρ/ρ are smaller compared to semiconductors such as germanium and silicon where they are 50 to 100 higher of the engineering term [2]
Summary
In 1856, the scientist Thompson explained the piezeoresitive behavior of iron and copper for the first time and showed that the resisting of these metals changed with the change of elongation. This is a very important feature for many applications This property works by bombing the pure carbon atom on the graphene sheet, where the carbon atoms apply perfectly to the hexagonal graphene structure and fill the holes. Melting blending technology has been found to be suitable for the manufacture of thermoplastic composites This process has an important principle, as the first polymers are heated to form a viscous solubility, after which high shear forces are applied to disperse graphene particles through the polymer, after which the casting process is used. 3. The sensor showed good stability for 15,000 loading and unloading cycles under three loads of 8.5,15 and 40 kPa with a low detection limit of 1.8 Pa and a rapid response of 2 ms. Depending on the construction material, the sensitivity of the sensors is divided into different parts, such as rGO foam, rGO / PU foam and SFrGO / PU foam, 0.09 to 30 with a sensitivity of 15.22, 0.22 and 46.67 kPa-1 for a pressure range of 0 to 0.3, 0.09 to 30 and 48 to 72 kPa-1 respectively
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