A smart material is one that exhibits some observable effect in one domain when stimulated through another domain. These cover all domains including mechanical, electrical, chemical, optical, thermal, and so on. Smart materials can add new capabilities to robotics, and especially artificial organisms. You need a robot that can track chemicals? You can use a smart material that changes electrical properties when exposed to the chemical. You need a robotic device that can be implanted in a person but will degrade to nothing when it has done its job of work? You can use biodegradable, biocompatible, and selectively dissolvable polymers. Smart materials largely cover the same set of physical properties (stiffness, elasticity, viscosity) as biological tissue and state-of-the-art soft robotic technologies that have the potential to deliver this capability. Smart materials can be divided into three groups: hydraulic and pneumatic soft systems; smart actuator and sensor materials; and stiffness changing materials.

How will these robots appear in our lives and how will we interact, and live, with them? We can foresee smart skins, assist and medical devices, biodegradable and environmental robots or intelligent soft robots. For example, the compliance of soft robotics makes them ideally suited for direct interaction with biological tissue. There has been much work on smart materials for direct skin-to-skin contact and for integration on the human skin, including electrical connections and electronic components.

Similarly, for people who are frail, disabled, or elderly a future solution will be in the form of power-assist clothing that will restore mobility. Ultimately wearable assist devices will make conventional assist devices redundant. Why use a wheel chair if you can walk again by wearing soft robotic Power Pants?

Because soft robotics is so suitable for interaction with biological tissue it is also natural to think of a device that can be implanted into the body and restore the functionality of diseased and damaged organs and structures. Such bio-integrating soft robotics is under development and expected to appear in the clinic over the next ten to fifteen years.

And by exploiting smart materials that are not only environmentally safe in operation, but which safely degrade to nothing in the environment, we can realize robots that live, die, and decay without environmental damage.

Just as the impact of the internet was impossible to predict, we cannot imagine where future robotics will take us. Immersive virtual reality? Certainly. Replacement bodies? Likely. Complete disruption of lives and society? Quite possibly! As we walk the path of the Robotics Revolution we will look back at this decade as the one where robotics really took off, and laid the foundations for our future world.

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