Dual-Colored Carbon Dot Ratiometric Fluorescent Test Paper Based on a Specific Spectral Energy Transfer for Semiquantitative Assay of Copper Ions

ACS Applied Materials & Interfaces
Cui LiuZhongping Zhang

Abstract

Classical pH test papers are widely used to measure the acid-base degree of media in a qualitative or semiquantitative manner. However, the extension of portable and inexpensive methods to a wide range of analytes so as to eliminate the tediousness of instrumental assays remains unsuccessful. Here, we report a novel kind of dual-colored carbon dot (CD) ratiometric fluorescent test paper for the semiquantitative assay of copper ions (Cu2+) by a dose-sensitive color evolution. The preparation of the test paper is based on the following two interesting findings: on the one hand, residual p-phenylenediamine at the surface of as-synthesized red CDs (r-CDs) efficiently binds Cu2+ ions to produce a strong visible absorption that overlaps the emission of blue CDs (b-CDs); on the other hand, the Cu2+ ions render the adsorption of small b-CDs onto the surface of larger r-CDs through their dual-coordinating interactions with the surface ligands of both r-CDs and b-CDs. These two mechanisms lead to a specific spectral energy transfer to quench the fluorescence of b-CDs with a sensitive detection limit of 8.82 nM Cu2+, whereas the red fluorescence of r-CDs is unaffected as a stable internal standard. Ratiometric fluorescent test papers have...Continue Reading

References

Dec 1, 2005·Journal of the American Chemical Society·Young-Keun YangJinsung Tae
May 8, 2010·Chemical Communications : Chem Comm·Guo-Yu LanHuan-Tsung Chang
Jun 12, 2013·Chemical Communications : Chem Comm·Juan ZhouChun-yang Zhang
Aug 12, 2015·ACS Applied Materials & Interfaces·Jia-Hui LiuYa-Ping Sun
Sep 12, 2015·Biosensors & Bioelectronics·Qingsong MeiYong Zhang

❮ Previous
Next ❯

Citations

Oct 27, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Jing-Xing Wu, Bing Yan
Feb 15, 2019·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Jianying WangLei Wang
Jan 13, 2018·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kevin A KirkSilvana Andreescu
Nov 13, 2018·Nano-micro Letters·Kok Ken ChanKen-Tye Yong
Oct 18, 2020·Luminescence : the Journal of Biological and Chemical Luminescence·Jianfei WeiRui Wang
Dec 9, 2020·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Ziting Zhang, Zhefeng Fan
Oct 12, 2020·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Roghayeh Jalili, Alireza Khataee
Mar 5, 2021·Critical Reviews in Analytical Chemistry·Daohong ZhangYufei Wang
May 8, 2021·Royal Society Open Science·Yunsu MaDongzhi Yang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.