Green and Cost Effective Synthesis of Fluorescent Carbon Quantum Dots for Dopamine Detection

Carbon quantum dots (CQDs) due to its high fluorescent output is evolving as novel sensing material and is considered as future building blocks for nano sensing devices. Hence, in this investigation we report microwave assisted preparation and multi sensing application of CQDs. The microwave derived...

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Bibliographic Details
Published inJournal of fluorescence Vol. 28; no. 2; pp. 573 - 579
Main Authors Bharathi, D., Siddlingeshwar, B., Krishna, R. Hari, Singh, Vikram, Kottam, Nagaraju, Divakar, Darshan Devang, Alkheraif, Abdulaziz Abdullah
Format Journal Article
LanguageEnglish
Published New York Springer US 01.03.2018
Springer Nature B.V
Subjects
Analytical Chemistry
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
CARBON
CONCENTRATION RATIO
Detection
DOPAMINE
Emission analysis
EMISSION SPECTRA
FLUORESCENCE
FOURIER TRANSFORMATION
INFRARED SPECTRA
MICROWAVE RADIATION
NANOSCIENCE AND NANOTECHNOLOGY
Original Article
Photon correlation spectroscopy
QUANTUM DOTS
QUENCHING
Rate constants
REACTION KINETICS
Sensors
Size distribution
Temperature
TEMPERATURE RANGE 0273-0400 K
Dopamine
Carbon quantum dots
Photoluminescence
Fluorescence quenching
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ISSN1053-0509
1573-4994
1573-4994
DOI10.1007/s10895-018-2218-3

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Summary:Carbon quantum dots (CQDs) due to its high fluorescent output is evolving as novel sensing material and is considered as future building blocks for nano sensing devices. Hence, in this investigation we report microwave assisted preparation and multi sensing application of CQDs. The microwave derived CQDs are characterized by Dynamic Light Scattering (DLS) experiment and Fourier Infrared spectra (FTIR) to investigate the size distribution and chemical purity respectively. Fluorescent emission spectra recorded at varying pH shows varying fluorescence emission intensities. Further, emission spectra recorded at different temperatures shows that fluorescence emission of CQDs greatly depends on temperature. Therefore, we demonstrate the pH and temperature sensing characteristics of CQDs by fluorescence quenching behaviour. In addition, the interaction and sensing behaviour of CQDs for dopamine is also presented in this work with a detection limit of 0.2 mM. The steady state and time-resolved methods have been employed in fluorescence quenching methods for sensing dopamine through CQDs at room temperature. The bimolecular quenching rate constants for different concentration have been measured. The interaction between CQDs and dopamine indicates fluorescence quenching method is an elegant process for detecting dopamine through CQDs.
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ISSN:1053-0509
1573-4994
1573-4994
DOI:10.1007/s10895-018-2218-3