December 22nd, 2010
Episode 25 of 559 episodes
Nanoparticles are all around us. Some are man-made, others occur naturally. Because they're so tiny - one nanometre is one billionth of a metre - nanoparticles can only be seen through an electron microscope. Nanoparticles have unique physical properties, and scientists are looking for ways to exploit these characteristics. Nanoparticles are currently used in medicine, in food, in clothes and cosmetics. In the future, nanoparticles could also be used to help improve energy generation and storage. They might also help us to remove contaminants from polluted water. In the second of two programmes about nanotechnology, Richard Hollingham concentrates on the environmental uses for nanotechnology, especially water and energy generation. Richard talks to Professor Eugene Cloete from Stellenbosch University in South Africa. Professor Cloete has developed a water filter that looks like a teabag and which uses nanofibres to filter out contaminants, including cholera bacteria. He visits the University of Brighton where a team led by Professor Andrew Cundy is developing ways of purifying large amounts of water at source, from reservoirs, lakes or rivers. Richard also meets researchers at the University of Cambridge who are developing thin films of nanocrystals that capture sunlight and turn it into electrical energy. As nanoparticles become more widely used, there’s growing concern about their safety. Richard talks to Professor Ian Colbeck from Essex University about the potential dangers of nanoparticles escaping into the environment. He also talks to Richard Denison from the Environmental Defence Fund in Washington who’s concerned about the lack of controls over the commercial exploitation of nanoparticles.
Have you trembled ‘round the campfire as the ghost stories are told? Do tales of horrors wrought by nature and beyond strike fear in your soul? Is it best when you are afraid to turn out the light? Thrill to stories that strike at your deepest fears, as host Stephen Kilpatrick brings the best of horror fiction to your ears and your mind, read to you by the most chilling narrators that podcasting has to offer. <br /> <br /> Podcasting the finest in genre fiction, Tales to Terrify is where the depths of horror reveal the truths of good, evil, and the human spirit in the District of Wonders podcast network. Like all shows in the District of Wonders, Tales to Terrify is supported by a welcoming community of dedicated fans and contributors. Subscribe today, and begin your journey through the spine-tingling depths of storytelling.<br /> <br /> Everyone has a story in the District of Wonders. Come and find yours.