Silicon_still_supreme - NEWS VIEWS spectrum of colours are...

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NEWS & VIEWS nature materials | VOL 4 | FEBRUARY 2005 | www.nature.com/naturematerials 119 spectrum of colours are essential, the new injection scheme may prove beneficial. Indeed, the less- stringent fabrication constraints and inherently planar nature of these single-gated devices would seem to make them very well suited to such applications. More generally, though, there is no reason the authors’ injection scheme should be limited to silicon. Their approach could also be used to improve the performance of wholly direct bandgap devices 5 . Or, by incorporating direct-bandgap quantum dots into silicon MOSFETs in a similar way to Walters et al. , devices with the benefi cial characteristics of both could be made. References 1. Walters, R. J., Atwater, H. & Bourianoff, G. Nature Mater . 4, 143–146 (2005). 2. Cullis, A. G., Canham, L. T. & Calcott, P. D. J. J. Appl. Phys . 82, 909–965 (1997). 3. Mason, M. D., Credo, G. M., Weston, K. D. & Buratto, S. K. Phys. Rev. Lett . 80, 5405–5408 (1998). 4. Credo, G. M., Mason, M. D. & Buratto, S. K. Appl. Phys. Lett . 74, 1978–1980 (1999). 5. Achermann, M. et al. Nature 429, 642–646 (2004). MATERIAL WITNESS Silicon still supreme There is a journalistic template for articles
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