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Mechanochemical green synthesis of exfoliated edge-functionalized boron nitride quantum dots: application to vitamin c sensing through hybridization with gold electrodes
, Article ACS Applied Materials and Interfaces ; Volume 10, Issue 34 , 2018 , Pages 28819-28827 ; 19448244 (ISSN) ; Hatamie, A ; Ghanbari, H ; Simchi, A ; Sharif University of Technology
American Chemical Society
2018
Abstract
Two-dimensional boron nitride quantum dots (2D BNQDs) with excellent chemical stability, high photoluminescence efficiency, and low toxicity are a new class of advanced materials for biosensing and bioimaging applications. To overcome the current challenge about the lack of facile, scalable, and reproducible synthesis approach of BNQDs, we introduce a green and facile approach based on mechanochemical exfoliation of bulk h-BN particles in ethanol. Few-layered hydroxylated-functionalized QDs with a thickness of 1-2 nm and a lateral dimension of 2-6 nm have been prepared. The synthesized nanocrystals exhibit a strong fluorescence emission at 407 and 425 nm with a quantum efficiency of ∼6.2%....
Stable Photodetectors based on fstable photodetectors based on formamidinium lead iodide quantum well perovskite nanoparticles fabricated with excess organic cations.ormamidinium lead iodide quantum well perovskite nanoparticles fabricated with excess organic cations
, Article ACS Applied Nano Materials ; Volume 4, Issue 8 , 2021 , Pages 7788-7799 ; 25740970 (ISSN) ; Mohammadi, M ; Rezaei, N.T ; Aynehband, S ; Shooshtari, L ; Mohammadpour, R ; Simchi, A ; Sharif University of Technology
American Chemical Society
2021
Abstract
Metal halide perovskite nanoparticles have recently attracted immense interest for photodetectors due to their outstanding optical and electronic properties such as high carrier diffusion length, tunable band gap (light absorption range), and high photoluminescence (PL) efficiency. Although significant progress has been achieved in the development of perovskites, their stability is yet to be addressed. To improve the stability and quantum efficiency of FAPbI3 perovskite nanocrystals, we present a room temperature protocol to fabricate fully passivated and stable FAPbI3 nanocrystals via 2D growth in the presence of amine ligands and an excess amount of the organic cations. The crystallization...