Abstract: The present disclosure relates to a composition that includes a first layer having a first molecule that includes a metal and a halogen, a second layer that includes the first molecule, and a third layer that includes a chiral molecule, where the third layer is positioned between the first layer and the second layer, and the first layer, the second layer, and the third layer form a crystalline structure.

Abstract: The present disclosure relates to a composition that includes a nanocrystalline core that includes a perovskite and having an outer surface, and a chiral molecule having a functional group, where the functional group is bonded to a first portion of the outer surface, and the composition is capable of circularly polarized luminescence (CPL). In some embodiments of the present disclosure, the composition is capable of absorbing circularly-polarized light.

Abstract: The present disclosure relates to a device that includes a first layer that includes a first perovskite that includes a first cation (A), a second cation (B), and first anion (X), a second layer that includes a second perovskite that includes a third cation (A?), a fourth cation (B?), and a second anion (X?), and a third layer that includes a two-dimensional (2D) material, where the third layer is physically positioned between the first layer and the second layer, and the third layer minimizes or eliminates the transfer of at least one of A, A?, B, B?, X, or X? between the first layer and the second layer.

Abstract: The present disclosure relates to a composition that includes a first layer having a first molecule that includes a metal and a halogen, a second layer that includes the first molecule, and a third layer that includes a chiral molecule, where the third layer is positioned between the first layer and the second layer, and the first layer, the second layer, and the third layer form a crystalline structure.

Abstract: The present disclosure relates to a nanocrystal that includes a nanocrystal core, a first ligand coordinated to a first portion of a surface of the nanocrystal core, and a second ligand coordinated to a second portion of the surface, where the second ligand includes a first functionalized aromatic molecule.

Abstract: Described herein are spin polarized light emitting diodes (LEDs) and methods of making the same. Spin polarization is achieved via chiral induced spin selectivity where, for example, a stereochemically active cation is included in a perovskite to form the conductive layer of an LED device. Advantageously, the devices and methods described herein allow for spin polarization at room temperature and without application of a magnetic field or ferromagnetic contacts, in contrast to other described spin selective LEDs.

Abstract: The present disclosure relates to a composition that includes a nanocrystalline core that includes a perovskite and having an outer surface, and a chiral molecule having a functional group, where the functional group is bonded to a first portion of the outer surface, and the composition is capable of circularly polarized luminescence (CPL). In some embodiments of the present disclosure, the composition is capable of absorbing circularly-polarized light.

Abstract: A back for a patient chair with which a patient may be moved from a generally upright sitting position to a generally supine position comprises a back shell and a cushion. The back shell has a front surface, a back surface, a top, a bottom, opposed first and second outer sides, a central section extending longitudinally from a region adjacent the top to a region adjacent the bottom and opposed side sections extending laterally outwardly from the central section toward the first and second outer sides. The cushion is attached to the back shell. The central section of the back shell comprises a plurality of stiffening elements that extend longitudinally of the back shell. A patient chair including the back is also described.

Abstract: A back for a patient chair having a back shell with a substantially rigid central S-shaped central portion and laterally extending wing portions which have sufficient flexibility to allow deflection in the direction of the front surface upon imposition of a force. The back consists of a formed back shell, a cushion layer laid thereover and an upholstery layer covering the cushion, with the upholstery layer adhered to the cushion and having edge margins wrapped around the outer edge margins of the cushion. The cushion and upholstery material are secured to the back shell through adhesive applied between the wrapped over edge margin portions of the upholstery material and the back shell.