Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “InSeI”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on InSeI by Materials Project

InSeI crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of two InSeI ribbons oriented in the (1, 0, 0) direction. there are eight inequivalent In3+ sites. In the first In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are a spread of In–Se bond distances ranging from 2.66–2.70 Å. The In–I bond length is 2.72 Å. In the second In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are two shorter (2.66 Å) and one longer (2.70 Å) In–Se bond lengths. The In–I bond length is 2.72 Å. In the third In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are two shorter (2.66 Å) and one longer (2.70 Å) In–Se bond lengths. The In–I bond length is 2.72 Å. In the fourth In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are two shorter (2.66 Å) and one longer (2.70 Å) In–Se bond lengths. The In–I bond length is 2.72 Å. In the fifth In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are one shorter (2.65 Å) and two longer (2.68 Å) In–Se bond lengths. The In–I bond length is 2.71 Å. In the sixth In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are one shorter (2.65 Å) and two longer (2.68 Å) In–Se bond lengths. The In–I bond length is 2.71 Å. In the seventh In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are one shorter (2.65 Å) and two longer (2.68 Å) In–Se bond lengths. The In–I bond length is 2.71 Å. In the eighth In3+ site, In3+ is bonded to three Se2- and one I1- atom to form corner-sharing InSe3I tetrahedra. There are a spread of In–Se bond distances ranging from 2.65–2.69 Å. The In–I bond length is 2.71 Å. There are eight inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the second Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the third Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the fourth Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the fifth Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the sixth Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the seventh Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. In the eighth Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three In3+ atoms. There are eight inequivalent I1- sites. In the first I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the second I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the third I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the fourth I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the fifth I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the sixth I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the seventh I1- site, I1- is bonded in a single-bond geometry to one In3+ atom. In the eighth I1- site, I1- is bonded in a single-bond geometry to one In3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2024

Sensitive Thermochromic Behavior of InSeI, a Highly Anisotropic and Tubular 1D van der Waals Crystal

Thermochromism, the change in color of a material with temperature, is the fundamental basis of optical thermometry. A longstanding challenge in realizing sensitive optical thermometers for widespread use is identifying materials with pronounced thermometric optical performance in the visible range. Herein, it is demonstrated that single crystals of indium selenium iodide (InSeI), a 1D van der Waals (vdW) solid consisting of weakly bound helical chains, exhibit considerable visible range thermochromism. A strong temperature-dependent optical band edge absorption shift ranging from 450 to 530 nm (2.8 to 2.3 eV) over a 380 K temperature range with an experimental (dE g /dT) max value extracted to be 1.26 × 10 −3 eV K −1 is shown. This value lies appreciably above most dense conventional semiconductors in the visible range and is comparable to soft lattice solids. The authors further seek to understand the origin of this unusually sensitive thermochromic behavior and find that it arises from strong electron–phonon interactions and anharmonic phonons that significantly broaden band edges and lower the E g with increasing temperature. The identification of structural signatures resulting in sensitive thermochromism in 1D vdW crystals opens avenues in discovering low-dimensional solids with strong temperature-dependent optical responses across broad spectral windows, dimensionalities, and size regimes.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Triel-Defined Helicity in One-Dimensional III–VI–VII van der Waals Crystals

Inorganic extended lattice solids that bear complex helical motifs manifest unusual physical and quantum states that arise due to their noncentrosymmetric or chiral nature. However, the systematic understanding of how elemental composition influences the structure and physical properties in helical inorganic crystals has been precluded by the rarity of these materials and the lack of modular phases that display such motifs. Here, we report the synthesis of AlSeI single crystals, the first aluminum-containing helical crystal in the III-VI-VII 1D van der Waals class. AlSeI completes the experimentally accessible triel series in the helical selene iodides alongside InSeI and GaSeI. Using the Al, Ga, and In triel series in this selene iodide class, we experimentally demonstrate the evolution of the local quasi-tetrahedral building unit geometry, chain packing, helical parameters, and band gaps based primarily on the identity of the triel atom. Our results underscore the chemical modularity of these phases, the broad range of helical parameters, and the spectrum of electronic states from the visible to the ultraviolet range in this emergent class of 1D, exfoliable, and helical extended lattice solids.

Chemical structure↗