来源：ACS PublicationsSpinel-type Zn2SnO4 and its La- and Ce-modified variants were synthesized via a solid-state route to investigate aliovalent substitution–induced structural, optical, and photoluminescence (PL) modulation. Undoped, La- and Ce-doped Zn2SnO4 samples were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, ultraviolet–visible spectroscopy, photoluminescence, scanning electron microscopy (SEM)–energy-dispersed spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) techniques. XRD confirmed the dominant cubic spi...
Release time:
2026
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来源：ACS PublicationsThe development of innovative luminescent materials for lighting and display applications is an important research field. In this work, we have employed an anionic condensation approach to discover a novel oxonitridosilicate synthesized via Li metal flux. LaSi2N3O crystallizes in the orthorhombic space group Pna21 (a = 7.82609(6), b = 18.24908(15), and c = 4.86567(5) Å) with a structure consisting of [Si6N12O2] ribbons cross-linked by [SiN3O] tetrahedra. This follows previously reported structural rules for a series of condensed rare-earth oxonitridosilicates, and disco...
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2026
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来源：ACS PublicationsConventional approaches to light–matter interactions rely on engineering photonic density of states. More recently, tailoring the spatial geometry of atoms or emitters themselves has emerged as a powerful and complementary route to control collective radiative properties. Here, we experimentally realize a geometry-engineered ensemble of rare-earth ions by fabricating a periodic array of subwavelength gold nanoholes on lithium niobate implanted with thulium ions, forming a semi-two-dimensional array of quantum emitters embedded in a high-index crystalline thin film. The hybri...
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2026
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来源：ACS PublicationsRhabdophane (REPO4·H2O; RE = La to Dy) and churchite (RE′PO4·2H2O; RE′ = Gd to Lu and Y) are secondary minerals formed via hydrothermal alteration of primary rare-earth minerals such as monazite (REPO4; RE = La to Gd) and xenotime (RE′PO4; RE′ = Tb to Lu and Y). Monazite and xenotime are promising host matrices for actinide-rich nuclear wastes. However, the aqueous alteration of these materials could result in the precipitation of rhabdophane and churchite. In this scenario, the actinides could partition into the secondary phases, and the subsequent α-decay of acti...
Release time:
2026
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