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Solid-State Fluorescent Selenium Quantum Dots by a Solvothermal-Assisted Sol-Gel Route for Curcumin Sensing.
Kuttappan Anupama1, Tessy Paul1, Kakkassery Aippunny Ann Mary1
1Department of Physics, St. Thomas' College (Autonomous), Thrissur 680001, Kerala, India.
ACS Omega
|September 2, 2021
Summary
We developed a new method to create solid-state selenium quantum dots (Se QDs) that resist self-quenching. These Se QDs show blue emission and can be used for sensing curcumin.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Solid-state fluorescent quantum dots are needed to overcome self-quenching issues.
- Selenium (Se) quantum dots offer potential for novel optical applications.
Purpose of the Study:
- To synthesize self-quenching resistant solid-state selenium quantum dots (Se QDs).
- To investigate the optical properties and sensing capabilities of the synthesized Se QDs.
Main Methods:
- A solvothermal-assisted sol-gel method was employed for Se QD synthesis.
- Morphological and crystalline characterizations were performed.
- Photoluminescence spectroscopy was used to study emission properties and sensing.
Main Results:
- Trigonal crystal structure Se QDs with an average size of 3-8 nm were synthesized.
- The Se QDs exhibited excitation wavelength-dependent solid-state blue emission with a 1.96 ns lifetime.
- The Se QDs demonstrated effective fluorescence quenching by curcumin, indicating potential for sensing.
Conclusions:
- The developed method successfully produced solid-state Se QDs resistant to self-quenching.
- The synthesized Se QDs are suitable for inner filter effect-based curcumin sensing applications.
