Smart fabrics enable enhanced garment utility beyond traditional clothing including conducting electricity, sensing, absorbing and emitting light, receiving and transmitting communication signals, generating energy, display, and regulating temperature and wetting, among many others. Light emitting devices on fabrics can create garments that emit light, change color or display information by responding to stimulus from the environment or the wearer of the fabric. Integration of such devices with digital control devices, conductive interconnects and microscale printed antennae can extend this functionality towards on-fabric display and communications. Many such applications need a power source, which can also act as an energy source. For this purpose, there is a drive towards smart fabrics that can create usable energy by harnessing solar, electromagnetic, mechanical and thermal energy from the environment. In this presentation, we will discuss scalable synthesis and design of fabric- and environment-friendly functional nanoparticle inks from low-cost earth-abundant materials for digital printing onto smart fabrics.