Table 5.
The summarization for the development of implantable sensors based on NGs.
| Type feature | Blood pressure sensors | Cardiac and respiratory sensors |
|---|---|---|
| Size (cm) | 1.7(Φ) [71] 3 × 2 [105] 1 × 1.5 [151] |
2 × 3 [58] 1 − 8 × 10−5 (Φ) [70] |
|
| ||
| Sensitivity/output voltage | 1.195 mV·mmHg−1 [151] | 4.5 V [45] 17.8 V [58] 50 mV [70] 45 V [104] 187 V [152] |
|
| ||
| Position/accessory | Heart [71, 105] Heart and femoral artery [151] |
Heart, lung, diaphragm [45] Heart [58, 152] Diaphragm [70] Between heart, pericardium [104] |
|
| ||
| Flexibility | Yes [71, 105, 151] | Yes [45, 58, 70, 104, 152] |
|
| ||
| Stretchability | None [71, 105, 151] | None [45, 57, 58, 70, 104, 152] |
|
| ||
| Types of nanogenerator | PENG [71] TENG [105, 151] |
PENG [45, 58, 70, 104] TENG [152] |