Engineering γ-graphyne quantum dots for photoactive applications and in vitro bioimaging
Abstract
Abstract Graphyne is the only known 2D material combining sp and sp2 hybridization, with γ-graphyne identified as its most stable allotrope. However, its quantum dots (γ-GYQDs) remain largely unexplored. This study investigates diamond-shaped and triangular γ -GYQDs using Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) simulations, focusing on stability, optoelectronic properties, and quantum confinement effects. We find that acetylenic bonds play a crucial role in stabilizing larger diamond-shaped γ-GYQDs. Functionalization has minimal impact on energy gaps, preserving key optical properties. Notably, the electronic structure aligns well for photoactive applications, with the HOMO level below the electrolyte’s I−/I 3 − redox potential and the LUMO above TiO2’s conduction band. Additionally, size-dependent red-shifts in absorption and emission spectra suggest strong potential for photovoltaics and biomedical applications. Furthermore, γ-GYQDs exhibit distinct quantum confinement effects due to their acetylenic linkages, highlighting their promising optoelectronic behavior for next-generation nanotechnology applications.
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Evidence Hub reads this as a simulation / modelling, done in cell cultures (in vitro), not in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health.
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