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Letter

Nature Materials 7, 701–706 (1 September 2008) | doi:10.1038/nmat2253

Multi-quantum-well nanowire heterostructures for wavelength-controlled lasers

Fang Qian , Yat Li , Silvija Grade|[ccaron]|ak , Hong-Gyu Park , Yajie Dong , Yong Ding , Zhong Lin Wang & Charles M. Lieber

Rational design and synthesis of nanowires with increasingly complex structures can yield enhanced and/or novel electronic and photonic functions. For example, Ge/Si core/shell nanowires have exhibited substantially higher performance as field-effect transistors and low-temperature quantum devices compared with homogeneous materials, and nano-roughened Si nanowires were recently shown to have an unusually high thermoelectric figure of merit.