Various applications for structured CNT-engineered materials are disclosed herein. In one application, systems are disclosed, wherein a structured CNT-engineered material forms at least part of an object capable of providing its own structural feedback. In another application, systems are disclosed, wherein a structured CNT-engineered material forms at least part of an object capable of generating heat. In yet another application, systems are disclosed, wherein a structured CNT-engineered material forms at least part of an object capable of functioning as an antenna, for example, for receiving, transmitting, absorbing and/or dissipating a signal. In still another application, systems are disclosed, wherein a structured CNT-engineered material forms at least part of an object capable of serving as a conduit for thermal or electrical energy.