Title :
Implementation of porous silicon technology for flow-through sensing using electro-osmotic phenomenon
Author :
Vanga, Kumar L. ; Hu, Qili ; Green, Sarah A. ; Bergstrom, Paul L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan Technol. Univ., Houghton, MI, USA
Abstract :
A demonstration of pH sensing for natural waters using nanoscaled porous media and electro-osmotic flow sampling has been performed. This paper presents an innovative integration of sensing and nano-scaled fluidic actuation in the combination of pH sensitive optical dye immobilization with the electro-osmotic phenomena in polar solvents like water. Through wafer nano-scaled porous silicon and porous silica membranes have been demonstrated as porous media and template for high density fluorescence measurements on optical dyes.
Keywords :
chemical sensors; electrophoresis; elemental semiconductors; nanofluidics; nanotechnology; pH measurement; silicon; Si; electro-osmotic flow sampling; electro-osmotic phenomena; electro-osmotic phenomenon; flow-through sensing; high density fluorescence measurements; nano-scaled fluidic actuation; nanoscaled porous media; optical dyes; pH sensing; pH sensitive optical dye immobilization; polar solvents; porous silica membranes; porous technology; wafer nano-scaled porous silicon; water; Mesoporous materials; Optical sensors; Optical variables measurement; Silicon; Silicon compounds; Substrates;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2011 11th IEEE Conference on
Conference_Location :
Portland, OR
Print_ISBN :
978-1-4577-1514-3
Electronic_ISBN :
1944-9399
DOI :
10.1109/NANO.2011.6144629
