1. Europium-functionalized luminescent titania nanotube arrays: Utilizing interactions with glucose, cholesterol and triglycerides for rapid detection application.
- Author
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Su, Baoze, Yang, Wenbin, Wang, Yao, Huang, Linjun, Popat, Ketul C., Kipper, Matt J., Belfiore, Laurence A., and Tang, Jianguo
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CHOLESTEROL content of food , *GLUCOSE , *TRIGLYCERIDES , *CHOLESTEROL , *COCONUT oil , *DRIED milk , *FLUORESCENCE quenching - Abstract
In this work, titania nanotube arrays (TiO 2 -NTs) were prepared by anodization, and the Eu(III) complexes (Eu (TTA) 3 phen with 2-thenoyltrifluoroacetone (TTA) and 1, 10-phenanthroline (phen)) were successfully coated onto the walls of the nanotubes. When a solution of glucose, cholesterol or triglycerides was dropped onto Eu(III) complex-modified TiO 2 -NTs, the fluorescence intensity of this material changes (glucose enhances fluorescence, cholesterol and triglycerides quench fluorescence). These phenomena are explained via an energy transfer process. The sensitivity of the fluorescence intensity to glucose, cholesterol or triglycerides concentration enables design of a multifunctional solid sheet-like detector. Under optimized experimental conditions, the change in fluorescence intensity ratio (ΔF/F 0) is linear with the concentration of glucose, cholesterol or triglycerides. To test the utility of the detector, glucose in orange juice, cholesterol in milk powder, and triglycerides in coconut oil were measured using this method and the results were in good agreement analytical data provided by a food testing company. The new method proposed here is simple, sensitive, reliable and suitable for practical applications. Unlabelled Image • Europium modified TiO 2 nanotube arrays were prepared by one-step anodization and in-situ Eu complex coating. • Fluorescence intensity of Europium modified TiO 2 nanotube arrays show good selectivity to glucose/cholesterol/triglycerides. • Europium modified TiO 2 nanotube arrays can accurately detect glucose, cholesterol or triglycerides content in food. • This method proposed is simple, sensitive, reliable and suitable for practical applications. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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