Nano Archive

Macroporous silicon: A versatile material for 3D structure fabrication

Trifonov, T and Rodríguez, A and Marsal, L. F. and Pallarès, J and Alcubilla, R (2008) Macroporous silicon: A versatile material for 3D structure fabrication. Sensors and Actuators A: Physical, 141 (2). 662 - 669.

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This work focuses on the fabrication of three-dimensional (3D) microstructures by electrochemical etching of n-type silicon. We exploit the possibility of modulating the pore diameter along the growing direction to produce quasi-3D structures which exhibit periodicity also in third dimension. The fabricated structures are further processed to convert them into truly 3D networks consisting of interconnected silicon veins embedded in air. In particular, we show how a variety of complex 3D networks can be obtained starting from a simple initial pore arrangement, e.g. square or hexagonal. These 3D structures can be easily fabricated with very high precision and uniformity on a large scale. They constitute ideal hosts for sensing applications as well as perfect molds for casting 3D structures of unusual materials.

Item Type:Article
Uncontrolled Keywords:Macroporous silicon; Electrochemical etching; Three-dimensional structures; Photonic crystals; Silicon micromachining
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanostructured materials
ID Code:4892
Deposited By:SPI
Deposited On:10 Apr 2009 05:49
Last Modified:10 Apr 2009 05:49

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