Nanoparticles articles within Nature

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  • News & Views |

    A technique called surface-enhanced Raman spectroscopy can detect tiny quantities of compounds in solution, but has been difficult to use for quantitative analysis. A digital approach involving nanoparticles suggests a way forward.

    • Peter J. Vikesland

  • Article
    | Open Access

    An experimental design consisting of a photonic-crystal nanoslab covered with upconversion nanoparticles demonstrates the phenomenon of supercritical coupling, resulting in giant enhancement of upconversion by photonic bound states in the continuum.

    • Chiara Schiattarella
    • , Silvia Romano
    •  & Gianluigi Zito

  • Research Briefing |

    Medium- and high-entropy alloys are hugely promising materials in metallurgy and catalysis, but their atomic-scale structure — and how that relates to their properties — is not well understood. A powerful method is beginning to reveal their secrets, with hopes for engineering better materials in the future.

  • Research Briefing |

    The full promise of materials structured at the nanoscale can be realized only if they can be manufactured more efficiently and at the sizes required for device integration. An innovative method takes advantage of thermodynamic and kinetic effects to control the growth of stacked 2D nanosheets that can be used for practical applications from the nanoscale to the macroscale.

  • Research Briefing |

    The synthesis of high-entropy alloy nanoparticles (HEA-NPs) — small particles each containing multiple principal metal elements — typically requires extreme conditions to ensure adequate mixing of constituents. Innovative experiments show that the liquid metal can act as a mixing reservoir to facilitate the synthesis of a diverse range of such nanoparticles in mild conditions.

  • Article |

    We discovered that liquid metal endowing negative mixing enthalpy with other elements could provide a stable thermodynamic condition and act as a desirable dynamic mixing reservoir, realizing the synthesis of high-entropy alloy nanoparticles.

    • Guanghui Cao
    • , Jingjing Liang
    •  & Lei Fu

  • Article
    | Open Access

    A simple spectral selective active colloidal system is designed in which TiO2 colloidal species are coded with dyes to form a photochromic swarm that adapts the appearance of incident light due to layered phase segregation.

    • Jing Zheng
    • , Jingyuan Chen
    •  & Jinyao Tang

  • News & Views |

    Particles that self-assemble from nanoribbons into bow-tie-shaped structures can be tailored to change the degree of their twist. A search for how best to quantify this twist homes in on a measure of how the bow ties respond to light.

    • Bart Kahr

  • Research Briefing |

    In current stretchable electronic devices, connection points between modules are made using commercially available pastes and break easily under mechanical deformation. An innovative connection interface has been developed to enable robust stretchable devices to be reliably assembled in a Lego‑like manner by simply pressing the interfaces of two modules together without pastes.

  • Research Briefing |

    Silicon nanowires that can convert light into electricity were engineered to split water into hydrogen and oxygen. When integrated with co-catalysts and suspended in water, these light-activated nanoreactors produced hydrogen gas under visible and infrared light.

  • Research Briefing |

    When circularly polarized light hits an array of chiral gold nanoparticles, it generates polarized electric and magnetic waves across the surface of the nanoparticles. Chiral molecules can alter these resonances, providing a highly sensitive method to determine and quantify molecular chirality, even at very low concentrations.

  • Article |

    An array of 2D crystals of isotropic, 432-symmetric chiral gold nanoparticles is shown to exhibit collective resonances with a strong and uniform chiral near field, allowing enantioselective detection by the collective circular dichroism.

    • Ryeong Myeong Kim
    • , Ji-Hyeok Huh
    •  & Ki Tae Nam

  • Article |

    Chiroptically active pinwheel assemblies on substrates are formed by tetrahedral gold nanoparticles from the effective ‘compression’ of a perovskite-like, low-density phase, thereby enabling the manufacture of metastructured coatings with special chiroptical characteristics as identified by photon-induced near-field electron microscopy and chirality measures.

    • Shan Zhou
    • , Jiahui Li
    •  & Qian Chen

  • Article |

    Preparing crystals held together with macromolecular bonds can create shape memory materials that can be engineered to exhibit a wide range of reversible changes useful for chemical sensing, optics and robotics.

    • Seungkyu Lee
    • , Heather A. Calcaterra
    •  & Chad A. Mirkin

  • Article |

      . Triplet fusion upconversion nanocapsules dispersed in a photopolymerizable resin allow for volumetric 3D printing at low-power continuous-wave excitation without support structures. 

    • Samuel N. Sanders
    • , Tracy H. Schloemer
    •  & Daniel N. Congreve

  • Article |

    A metastable palladium hydride is synthesized where the unique environment in the liquid cell, namely the limited quantity of Pd precursors and the continuous supply of H, resulted in the formation of the hcp phase.

    • Jaeyoung Hong
    • , Jee-Hwan Bae
    •  & Dong Won Chun

  • News & Views |

    The chirality, or handedness, of nanoparticles is shown to be a key factor in determining how well such particles engage with the immune system — a finding that might help to inform the design of vaccines and anticancer therapeutics.

    • Alexander Hooftman
    •  & Luke A. J. O’Neill

  • News & Views |

    Tiny flakes of metal suspended in a solution have been observed to self-assemble into pairs separated by a narrow gap — offering a tunable system for studying combinations of light and matter known as polaritons.

    • Johannes Feist

  • Article |

    Gold nanoflake pairs form by self-assembly in an aqueous ligand solution and offer stable and tunable microcavities by virtue of equilibrium between attractive Casimir forces and repulsive electrostatic forces.

    • Battulga Munkhbat
    • , Adriana Canales
    •  & Timur O. Shegai

  • Article |

    Through precise structural engineering, perovskite nanocrystals are co-assembled with other nanocrystal materials to form a range of binary and ternary perovskite-type superlattices that exhibit superfluorescence.

    • Ihor Cherniukh
    • , Gabriele Rainò
    •  & Maksym V. Kovalenko

  • Article |

    Polymer-covered inorganic nanoparticles are designed to self-assemble into micrometre-sized superlattice crystallites that can subsequently be built into freestanding centimetre-scale solids with hierarchical order across seven orders of magnitude.

    • Peter J. Santos
    • , Paul A. Gabrys
    •  & Robert J. Macfarlane

  • Article |

    Dispersion of colloidal disks in a nematic liquid crystal reveals several low-symmetry phases, including monoclinic colloidal nematic order, with interchange between them achieved through variations in temperature, concentration and surface charge.

    • Haridas Mundoor
    • , Jin-Sheng Wu
    •  & Ivan I. Smalyukh

  • News & Views |

    In some materials, the absorption of a single photon can trigger a chain reaction that produces a large burst of light. The discovery of these photon avalanches in nanostructures opens the way to imaging and sensing applications.

    • Andries Meijerink
    •  & Freddy T. Rabouw

  • Article |

    Room-temperature photon avalanching realized in single thulium-doped upconverting nanocrystals enables super-resolution imaging at near-infrared wavelengths of maximal biological transparency and provides a material platform potentially suitable for other optical technologies.

    • Changhwan Lee
    • , Emma Z. Xu
    •  & P. James Schuck

  • Article |

    Lateral-flow in vitro diagnostic assays based on fluorescent nanodiamonds, in which microwave-based spin manipulation is used to increase sensitivity, are demonstrated using the biotin–avidin model and by the single-copy detection of HIV-1 RNA.

    • Benjamin S. Miller
    • , Léonard Bezinge
    •  & Rachel A. McKendry

  • News & Views |

    Atoms of a metal alloy have been tracked as they form crystal nuclei — the first ordered clusters of atoms or molecules produced during crystallization. The findings might help to develop a general nucleation theory.

    • Peter G. Vekilov

  • Letter |

    All-inorganic perovskite nanocrystals containing caesium and lead provide low-cost, flexible and solution-processable scintillators that are highly sensitive to X-ray irradiation and emit radioluminescence that is colour-tunable across the visible spectrum.

    • Qiushui Chen
    • , Jing Wu
    •  & Xiaogang Liu

  • Letter |

    The lowest-energy exciton state in caesium lead halide perovskite nanocrystals is shown to be a bright triplet state, contrary to expectations that lowest-energy excitons should always be dark.

    • Michael A. Becker
    • , Roman Vaxenburg
    •  & Alexander L. Efros

  • Letter |

    Computationally designed icosahedral protein-based assemblies can protect their genetic material and evolve in biochemical environments, suggesting a route to the custom design of synthetic nanomaterials for non-viral drug delivery.

    • Gabriel L. Butterfield
    • , Marc J. Lajoie
    •  & David Baker

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