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Issue 32, 2012
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Freestanding monolithic silicon aerogels

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The electrical, optical, and (bio)chemical properties of porous Si have attracted considerable interest for battery, solar cell, display, sensor, biomedical, and other applications. Free-standing monolithic Si aerogels have been generated for the first time via low-temperature magnesiothermic reduction of SiO2 aerogels. Under appropriate conditions, the reaction of Mg gas with SiO2 produced a co-continuous mixture of predominantly MgO and Si. Selective MgO dissolution then yielded nanocrystalline, porous, photoluminescent Si aerogels with a high degree of porosity (97.3 vol%) and a high specific surface area (615 m2 gāˆ’1).

Graphical abstract: Freestanding monolithic silicon aerogels

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The article was received on 17 Mar 2012, accepted on 24 Jun 2012 and first published on 13 Jul 2012

Article type: Communication
DOI: 10.1039/C2JM31662E
J. Mater. Chem., 2012,22, 16196-16200

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    Freestanding monolithic silicon aerogels

    K. Chen, Z. Bao, J. Shen, G. Wu, B. Zhou and K. H. Sandhage, J. Mater. Chem., 2012, 22, 16196
    DOI: 10.1039/C2JM31662E

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