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Fabrication of WO Quantum Dots with Different Emitting Colors and Their Utilization in Luminescent Woods. | LitMetric

Fabrication of WO Quantum Dots with Different Emitting Colors and Their Utilization in Luminescent Woods.

Nanomaterials (Basel)

Division of Advanced Materials Engineering, Center for Advanced Materials and Parts of Powders, Kongju National University, Cheonan-si 31080, Republic of Korea.

Published: May 2024

AI Article Synopsis

  • - The study focuses on the growing interest in smart windows and optical displays, emphasizing the potential of metal oxides (MOs) for their unique electronic and optical properties, despite challenges in tuning and mass production of quantum dots.
  • - Researchers developed a scalable method to create tungsten oxide (WO) quantum dots of different sizes through a sequential insertion/exfoliation technique in specific solvents, resulting in three distinct emission colors (red, green, blue).
  • - Characterization revealed that WO quantum dots around 30 nm, 50 nm, and 70 nm sizes have a monoclinic structure, with size-dependent blue shifts in their emitting peaks, suggesting promising applications in optoelectronics and transparent building materials.

Article Abstract

With a rising interest in smart windows and optical displays, the utilization of metal oxides (MOs) has garnered significant attention owing to their high active sites, flexibility, and tunable electronic and optical properties. Despite these advantages, achieving precise tuning of optical properties in MOs-based quantum dots and their mass production remains a challenge. In this study, we present an easily scalable approach to generate WO quantum dots with diverse sizes through sequential insertion/exfoliation processes in solvents with suitable surface tension. Additionally, we utilized the prepared WO quantum dots in the fabrication of luminescent transparent wood via an impregnation process. These quantum dots manifested three distinct emitting colors: red, green, and blue. Through characterizations of the structural and optical properties of the WO quantum dots, we verified that quantum dots with sizes around 30 nm, 50 nm, and 70 nm showcase a monoclinic crystal structure with oxygen-related defect sites. Notably, as the size of the WO quantum dots decreased, the maximum emitting peak underwent a blue shift, with peaks observed at 407 nm (blue), 493 nm (green), and 676 nm (red) under excitation by a He-Cd laser (310 nm), respectively. Transparent woods infused with various WO quantum dots exhibited luminescence in blue/white emitting colors. These results suggest substantial potential in diverse applications, such as building materials and optoelectronics.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11173498PMC
http://dx.doi.org/10.3390/nano14110936DOI Listing

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