Growth and Structure of ZnO Nanorods on a Sub-Micrometer Glass Pipette and Their Application as Intracellular Potentiometric Selective Ion Sensors
2010 (English)In: Materials, ISSN 1996-1944, Vol. 3, 4657-4667 p.Article in journal (Refereed) Published
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 Na
+. The membrane-coated ZnO nanorods exhibited a Na+-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.
Place, publisher, year, edition, pages
2010. Vol. 3, 4657-4667 p.
IdentifiersURN: urn:nbn:se:liu:diva-64303DOI: 10.3390/ma3094657OAI: oai:DiVA.org:liu-64303DiVA: diva2:389074