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Porous Silicon—A Versatile Host Material
Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, A-8010 Graz, Austria
* Author to whom correspondence should be addressed.
Received: 31 October 2009; in revised form: 22 January 2010 / Accepted: 2 February 2010 / Published: 3 February 2010
Abstract: This work reviews the use of porous silicon (PS) as a nanomaterial which is extensively investigated and utilized for various applications, e.g., in the fields of optics, sensor technology and biomedicine. Furthermore the combination of PS with one or more materials which are also nanostructured due to their deposition within the porous matrix is discussed. Such nanocompounds offer a broad avenue of new and interesting properties depending on the kind of involved materials as well as on their morphology. The filling of the pores performed by electroless or electrochemical deposition is described, whereas different morphologies, reaching from micro- to macro pores are utilized as host material which can be self-organized or fabricated by prestructuring. For metal-deposition within the porous structures, both ferromagnetic and non-magnetic metals are used. Emphasis will be put on self-arranged mesoporous silicon, offering a quasi-regular pore arrangement, employed as template for filling with ferromagnetic metals. By varying the deposition parameters the precipitation of the metal structures within the pores can be tuned in geometry and spatial distribution leading to samples with desired magnetic properties. The correlation between morphology and magnetic behaviour of such semiconducting/magnetic systems will be determined. Porous silicon and its combination with a variety of filling materials leads to nanocomposites with specific physical properties caused by the nanometric size and give rise to a multiplicity of potential applications in spintronics, magnetic and magneto-optic devices, nutritional food additives as well as drug delivery.
Keywords: porous silicon; electrodeposition; nanostructures; nanoparticles
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Cite This Article
MDPI and ACS Style
Granitzer, P.; Rumpf, K. Porous Silicon—A Versatile Host Material. Materials 2010, 3, 943-998.
Granitzer P, Rumpf K. Porous Silicon—A Versatile Host Material. Materials. 2010; 3(2):943-998.
Granitzer, Petra; Rumpf, Klemens. 2010. "Porous Silicon—A Versatile Host Material." Materials 3, no. 2: 943-998.