A device that can simultaneously harvest energy from both the sun and wind might one day help generate power for “smart cities,” researchers say.
Cities are growing smarter as networks of electronics help them monitor and control infrastructure and services. Ideally, these devices would be powered by renewable energy sources such as the sun and wind. Solar energy can come from rooftops and into even windows. However, large amounts of wind energy often gets wasted in cities—conventional wind turbines are usually not suited to urban areas because of their size.