S. A. Novikova, E. D. Gribova, K. S. Kasimtseva, E. A. Sidorov, I. N. Fadeikina, A. N. Nechaev, “A surface modification strategy for synthesizing highly water-stable CsPbBr<nobr>$_3$</nobr> perovskite quantum dots”, Nanosystems: Physics, Chemistry, Mathematics, 2025, Volume 16, Issue 4,Pages <nobr>521

CHEMISTRY AND MATERIAL SCIENCE

A surface modification strategy for synthesizing highly water-stable CsPbBr$_3$ perovskite quantum dots

S. A. Novikova^a, E. D. Gribova^a, K. S. Kasimtseva^a, E. A. Sidorov^a, I. N. Fadeikina^b, A. N. Nechaev^b

^a Dubna State University, Dubna, Moscow oblast, 141980, Russia
^b Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980 Russia

Abstract: Hydrophobic CsPbBr$_3$ perovskite quantum dots (PQDs) were synthesized via a ligand-assisted re precipitation method with various antisolvents. A study was conducted to assess antisolvents influence on the properties of the synthesized PQDs. To enhance the stability of PQDs in polar media and possess surface functional groups for further conjugation with biomolecules, the surface of the nanoparticles was modified with 2 bromoisovaleric acid (Br-iVA), cetyl alcohol (CtA), and 3-aminopropyltriethoxysilane (APTES). PQDs modified with Br-iVA exhibited the highest stability in polar solvents and water, maintaining for up to 90 days.

Keywords: perovskite quantum dots, ligand-assisted re-precipitation, halide-exchange method, modification PQDs.

Received: 10.10.2024
Revised: 30.03.2025
Accepted: 01.08.2025

Language: English

DOI: 10.17586/2220-8054-2025-16-4-521-527