Growth and Structure of ZnO Nanorods on a Sub-Micrometer Glass Pipette and Their Application as Intracellular Potentiometric Selective Ion Sensors.
Materials (Basel)
; 3(9): 4657-4667, 2010 Sep 09.
Article
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| ID: mdl-28883346
ABSTRACT
This paper presents the growth and structure of ZnO nanorods on a sub-micrometer glass pipette and their application as an intracellular selective ion sensor. Highly oriented, vertical and aligned ZnO nanorods were grown on the tip of a borosilicate glass capillary (0.7 µm in diameter) by the low temperature aqueous chemical growth (ACG) technique. The relatively large surface-to-volume ratio of ZnO nanorods makes them attractive for electrochemical sensing. Transmission electron microscopy studies show that ZnO nanorods are single crystals and grow along the crystal's c-axis. The ZnO nanorods were functionalized with a polymeric membrane for selective intracellular measurements of Naâº. The membrane-coated ZnO nanorods exhibited a Naâº-dependent electrochemical potential difference versus an Ag/AgCl reference micro-electrode within a wide concentration range from 0.5 mM to 100 mM. The fabrication of functionalized ZnO nanorods paves the way to sense a wide range of biochemical species at the intracellular level.
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MEDLINE
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En
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Materials (Basel)
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2010
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Article