The current technological development requires new ways of interfacing between humans and machines. Soft tissues typical of human body actually need to be linked to the rigid electronics and mechanical components of machineries thanks to devices which reproduce the features of both realms. Drawing inspiration from the human skin, tactile or smart sensors are devices able to sense external stimuli, such as deformations, temperature, moisture and light. These devices find applications in a wide range of fields like world of wearables, soft robotics, prosthetic and e-skin. In particular, the reproduction of haptic sensation is a challenge which still yielded no applicable results, despite its considerable importance in biomedicine.