Liquid Interface X-ray Scattering

Material

Ionic-like Superlattices by Charged Nanoparticles: A Step Toward Photonics Applications

Controlled two-dimensional self-assembly of gold nanoparticles is demonstrated, and then studied using surface-sensitive synchrotron X-ray diffraction techniques, particularly grazing incidence small-angle x-ray scattering. The authors established the formation of distinct checkerboard square lattice structures at a range of pH values and molar ratios of the constituents. By regulating pH, the superlattices can transform from a square to a hexagonal lattice, or vice versa, and to a single-component superstructure at the interface.

ACS Applied Nano Materials 2024 7 (3), 3220-3228.

https://doi.org/10.1021/acsanm.3c05566

Techniques: GISAXS, XR

Porphene and porphite as porphyrin analogs of graphene and graphite

The authors report the preparation of Zn porphene, a member of the previously only hypothetical organic metalloporphene family. The material is synthesized on the water surface and X-ray reflectivity confirms a monolayer is present. Grazing incidence x-ray diffraction is instrumental in determining the unit cell parameters of the novel material.

Nat. Commun. 2023, 14 (1), 6308.

https://doi.org/10.1038/s41467-023-41461-w

Techniques: GIXD, XR

Surface Ligand Modification on Ultrathin Ni(OH)2 Nanosheets Enabling Enhanced Alkaline Ethanol Oxidation Kinetics

Developing efficient non-precious-metal catalysts for ethanol oxidation reactions has become one of the most important topics in renewable energy. Nickel dihydroxide nanosheets are worthy candidates for filling this role. The authors make this 2D nanomaterial at the air-water interface and employ grazing incidence X-ray diffraction to characterize the lateral ordering, identifying successful synthesis and the increased long range ordering under optimal conditions.

ACS Nano 2023 17 (17), 17180-17189.

https://doi.org/10.1021/acsnano.3c05014

Techniques: TR-GIXD