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As a first step, we have synthesized and optically characterized a systematic series of one-dimensional (1D) single-crystalline Eu3+-activated alkaline-earth metal tungstate/molybdate solid-solution composite CaW1–xMoxO4 (0 ≤ “x” ≤ 1) nanowires of controllable chemical composition using a modified template-directed methodology under ambient room-temperature conditions. Extensive characterization of the resulting nanowires has been performed using X-ray diffraction, electron microscopy, and optical spectroscopy. The crystallite size and single crystallinity of as-prepared 1D CaW1–xMoxO4:Eu3+ (0 ≤ “x” ≤ 1) solid-solution composite nanowires increase with increasing Mo component (“x”). We note a clear dependence of luminescence output upon nanowire chemical composition with our 1D CaW1–xMoxO4:Eu3+ (0 ≤ “x” ≤ 1) evincing the highest photoluminescence (PL) output at “x” = 0.8, among samples tested. Subsequently, coupled with either zero-dimensional (0D) CdS or CdSe quantum dots (QDs), we successfully synthesiz...

the journal of physical chemistry c

Synthesis of Compositionally Defined Single-Crystalline Eu3+-Activated Molybdate–Tungstate Solid-Solution Composite Nanowires and Observation of Charge Transfer in a Novel Class of 1D CaMoO4–CaWO4:Eu3+–0D CdS/CdSe QD Nanoscale Heterostructures