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Optically Encoded Smart Dust from DBR Porous Silicon

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Abstract:

Distributed Bragg reflector (DBR) porous silicons exhibiting unique reflectivity were successfully obtained by an electrochemical etching of silicon wafer using square wave currents. Optically encoded smart dust which retained optical reflectivity was obtained from DBR porous silicon film in organic solution by using ultra-sono method. The size of optically encoded smart dust was measured by field emission scanning electron micrograph (FESEM) and was about 500 nm to few microns depending on the duration of sonication. Investigation for the optical characteristics of smart dust revealed that smart dust could be useful for application such as chemical sensor for detecting organic vapors.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

53-56

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.53

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Online since:

October 2006

Authors:

Bong Ju Lee, Sung Gi Kim, Hong Lae Sohn

Keywords:

Chemical Sensor, DBR Porous Silicon, Red-Shift, Reflectivity, Smart Dust

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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