Very high surface area silicon powders can be realized by high energy milling or electrochemical etching techniques. The biodegradability of nanostructured silicon (1) is receiving increasing attention for medical applications such as drug delivery (2). The use of semiconducting silicon in brachytherapy (highly targeted radiotherapy) is now under clinical evaluation for treating primary liver cancer (3) and more recently, pancreatic cancer. This talk will give an overview of progress in medical therapy and conclude by describing recent experiments relating to food and drink technology (4).

(1) L.T.Canham. Adv.Mater.7,1033 (1995)

(2) C.Prestidge et al. Expert Opinion in Drug Delivery 4, 101 (2007)

(3) A.Goh et al. Int.J.Radiat.Oncol.Biol.Phys. 67, 786 (2007)

(4) L.T.Canham. Nanotechnology 18, 185704 (2007)

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