Single photon sources are fundamental for applications in quantum computing, secure communication, and sensing, as they enable the generation of individual photons and ensure strict control over photo...

Room-temperature circularly polarized single-photon sources are crucial for quantum information and photonic technologies. Here we integrated europium (Eu3+)-doped organic complexes with chiral plasmo...

Time for a rare bit of explicit self-promotion on this blog.  This coming Thursday, October 9, as part of the American Chemical Society 's a...

Polymer nanocomposites, consisting of a polymer matrix and nanoparticles, are key materials in modern soft matter science. Because their macroscopic properties are closely linked to nanoscale dynamics...

Reporters engage in charm and betrayal; checkers are in the harm-reduction business.

In cellular automata, simple rules create elaborate structures. Now researchers can start with the structures and reverse-engineer the rules.

Self-promotional language may attract readers but is discouraged in Communications Psychology. Because style matters in fostering credibility.

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Optical properties of the lead halide perovskite nanocrystals are controlled by confined excitons and a rich spectrum of confined acoustic and optical phonons. We study experimentally and theoreticall...

Measuring quantum dot properties at the single-particle level in their native liquid environment provides a powerful means of deepening our understanding of quantum dot systems and advancing their applications. In this work, we successfully measure the electrical charge of individual CdSe/CdS core/shell quantum dots, with diameters of 15 and 25 nm, in a nonpolar liquid, with precision at the elementary charge level. This is accomplished by combining laser scanning microscopy with high-field electrophoresis, where the observed electrophoretic mobilities show clear clustering around values corresponding to discrete charge states. A thermodynamic charging model captures the dominant features of the probability distribution and size dependence of the observed charges. This research opens the possibility to study charge-related optical and electronic phenomena at the single-quantum-dot level in solution.

The main aspects of the EU’s long-term budget for 2028-2034, its revenue and spending areas, as well as factsheets on key aspects are available on this page.

Magic-sized nanocrystals (MSNCs) are semiconductor crystallites that grow in discrete steps. They lead to samples that potentially contain a single size and shape (i.e., monodisperse). To understand the impact of “magic” sizes on optical performance, we study the emission of individual MSNCs at room temperature. We find that the single-MSNC line width dominates ensemble emission spectra. By examining MSNCs with different sizes and shells, we conclude that the observed single-particle line is consistent with coupling of excitons to acoustic surface phonons. This coupling and any residual size dispersity influence MSNCs more than standard quantum dots, which experience weaker confinement. When CdSe quantum dots with similar confinement are compared with small CdSe MSNCs (<2.7 nm diameter), MSNCs have narrower ensemble spectra. Our MSNCs are bright emitters (40–80% efficient) with strong photon antibunching [g(2)(0) ∼ 0.05], making them promising candidates for applications in optoelectronics and quantum information, where strong three-dimensional confinement is required.

Colloidal 2D PbX (X = S, Se, Te) nanocrystals are innovative materials pushing the boundaries of quantum confinement by combining crystal thicknesses down to a monolayer with additional confinement in...