[027] Smart textiles developed in accordance with present teachings have successfully achieved a maximum output power of 3.2mW with foot stepping (e.g. walking) at a load of 10 . [028] Sensory textile devices disclosed herein may comprise a single arch strain sensor or varying-height multi-arch strain sensor using the smart textile of present teachings, with a wide sensing range from 10% to 160%. Additionally, a resistance variation-based strain sensor is also characterized. [029] With reference to FIGs. 7 to 9, by leveraging arch-shaped strain sensors as disclosed herein positioned on human fingers, finger motions can be monitored and differentiated between. This functionality can be useful in healthcare applications such as patient monitoring, and in robot control. [030] In some embodiments, four self-powered sensors based on the smart textile are fabricated and attached on different parts of human body for activity monitoring. Together, the sensors are able to detect the actions of standing up, walking, running, arm bending, sudden falling, and sitting. Additional sensors will be able to identify additional movements, or provide be able to monitor the extent of those movement with greater resolution - e.g. finer differences between angles of an arm during bending [031] In addition, the smart textile disclosed herein can also be used for C02 sensing with a PEI coating, and a wearable arch shaped CO2 sensor based on the smart textile may be fabricated. [032] For real cloth applications - e.g. in the fabrication of smart garments, wearable smart sensory devices and the like - smart socks are fabricated to enable energy harvesting (e.g. in triboelectric nanogenerators (TENG)) for human motion such as walking and jumping. The sensory textiles and sensory textile devices disclosed herein may be incorporated into other garments, such as shirts, pants, shoes and elsewhere. [034] Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) has been found t o be a successful conducting polymer for practical applications - e.g. in garments and [033] With the aid of multiple electrodes, various human motion states and gaits can be detected. For more quantitative sensing, thin piezoelectric (PZT) sensors can also be embedded into socks to perform force analysis on the foot. Smart socks are then able to monitor or infer the level or perspiration of a human by taking the PZT sensor as a reference part. The PZT sensor output may be used as a baseline for inferring a difference in function of a triboelectric sensor in the same garment, or placed near or on the PZT sensor, and thereby infer the extent to which the triboelectric sensor has been effected by perspiration.