Still early days for this pointer to the future item, but the American Chemical Society’s (ACS) Nano Letters is reporting on development of a super-thin film they call ‘piezo-rubber’ –flexible, biocompatible rubber films for use in implantable or wearable energy harvesting systems. For instance, energy from lung motion could generate electricity to run a pacemaker, eliminating the surgery needed every-few-years to replace batteries. Or run other types of sensors. Health IT/Stone Hearth. ACS Release. Nano Letters 26 Jan 2010 (charge to read).