Carbon quantum dots fluorescence quenching for potassium optode construction. (29th April 2019)

• Record Type: Journal Article
• Authors: Rahimi, Mehdi; Mahani, Mohamad; Hassani, Zahra
• Is Part Of: Luminescence. Volume 34:Number 4(2019)
• Page Start: 402
• Page End: 406
• Publication Date: 2019-04-29
• Subjects: carbon quantum dot -- fluorescence -- optode -- potassium -- quantum yield -- quenching; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.3634
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: Photophysical phenomena associated with carbon nanoparticles in combination with biocompatibility and readily functionalizable properties have attracted significant interest for sensing and imaging applications. A potassium ion optode based on the fluorescence quenching of carbon quantum dots (CQDs) was constructed. The CQDs were synthesized using a microwave method, citric acid and 2, 2′‐(ethylene‐dioxy)bis(ethylamine). A quantum yield of 7.1% was calculated for the synthesized CQDs. A linear dynamic range of about one‐order of magnitude with a correlation coefficient of 0.99 was obtained. The optode was applied on real samples and a 0.60–1.60% error range was obtained relative to the ion‐selective electrode.