Time-Resolved Photoluminescence Study of MnS/ZnS Core/Shell Quantum Dots at High Pressure and Low Temperature

Huang, Da; Wang, He; Zhao, Wei; Dai, Rucheng; Wang, Zhongping.; Zhang, Zengming

doi:10.1021/acs.jpcc.1c07179

Cited by 1 publication

(2 citation statements)

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“…Heterostructural core/shell NPs have emerged as an interesting class of materials. Because of the synergistic effects of several components within one particle, core/shell NPs often show enhanced and/or new properties over their individual constituents, such as improved chemical and thermal stabilities, high energy conversion efficiency, and high PL quantum efficiencies. , In recent years, significant research efforts have been devoted to elucidating high-pressure behaviors of heterostructural core/shell NPs, the optical responses of which are commonly found as material specific. , For instance, the PL of core/shell CdSe/CdS NPs was observed to blue-shift with decreased intensity upon the application of pressure as quasi-type II electron structures transitioned to type I . Interestingly, compared to samples with thinner shells, efficient emission could be maintained at higher pressures for those with thicker shells.…”

Section: Pressure-induced Property Changes In Inorganic Npsmentioning

confidence: 99%

“…134,135 In recent years, significant research efforts have been devoted to elucidating high-pressure behaviors of heterostructural core/shell NPs, the optical responses of which are commonly found as material specific. 136,137 For instance, the PL of core/shell CdSe/CdS NPs was observed to blue-shift with decreased intensity upon the application of pressure as quasitype II electron structures transitioned to type I. 138 Interestingly, compared to samples with thinner shells, efficient emission could be maintained at higher pressures for those with thicker shells.…”

Section: Pressure-induced Property Changes In Inorganic Npsmentioning

confidence: 99%

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Theoretical and Experimental Advances in High-Pressure Behaviors of Nanoparticles

Meng,

Vu,

Criscenti

et al. 2023

Chem. Rev.

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Using compressive mechanical forces, such as pressure, to induce crystallographic phase transitions and mesostructural changes while modulating material properties in nanoparticles (NPs) is a unique way to discover new phase behaviors, create novel nanostructures, and study emerging properties that are difficult to achieve under conventional conditions. In recent decades, NPs of a plethora of chemical compositions, sizes, shapes, surface ligands, and self-assembled mesostructures have been studied under pressure by in-situ scattering and/or spectroscopy techniques. As a result, the fundamental knowledge of pressure–structure–property relationships has been significantly improved, leading to a better understanding of the design guidelines for nanomaterial synthesis. In the present review, we discuss experimental progress in NP high-pressure research conducted primarily over roughly the past four years on semiconductor NPs, metal and metal oxide NPs, and perovskite NPs. We focus on the pressure-induced behaviors of NPs at both the atomic- and mesoscales, inorganic NP property changes upon compression, and the structural and property transitions of perovskite NPs under pressure. We further discuss in depth progress on molecular modeling, including simulations of ligand behavior, phase-change chalcogenides, layered transition metal dichalcogenides, boron nitride, and inorganic and hybrid organic–inorganic perovskites NPs. These models now provide both mechanistic explanations of experimental observations and predictive guidelines for future experimental design. We conclude with a summary and our insights on future directions for exploration of nanomaterial phase transition, coupling, growth, and nanoelectronic and photonic properties.

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