Optical properties of VO2 spherical nanoparticles

Coşkun, Mustafa; Altınöz, Safi; Coşkun, Özlem Duyar

doi:10.1016/j.photonics.2022.100993

Cited by 5 publications

(3 citation statements)

References 35 publications

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“…These scattering effects can have a stronger influence at higher energies (shorter wavelengths) relative to the SPR transitions. 55,56 We observe no compelling evidence to suggest that scattering effects influence the position of SPR transitions in this study. SPRnormalized optical spectra for a selection CuNP samples presented in Figures 2−4 The peak position of the SPR transition in MNPs is also influenced by nanoparticle size.…”

Section: ■ Results and Discussioncontrasting

confidence: 75%

“…Optical scattering contributions may influence the position of SPR transitions in nanomaterials. These scattering effects can have a stronger influence at higher energies (shorter wavelengths) relative to the SPR transitions. , We observe no compelling evidence to suggest that scattering effects influence the position of SPR transitions in this study. SPR-normalized optical spectra for a selection CuNP samples presented in Figures – are reproduced over the wavelength range 400–850 nm and presented in Supporting Information, Figure S1 ( T-2Py , BuT-2Py , BuT-3Py , and But-4Py ) and Figure S2 ( T-Me , T-Ph , T-3Py , and T-4Py ).…”

Section: Resultscontrasting

confidence: 65%

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Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation

et al. 2023

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We report on studies that demonstrate how the chemical composition of the surface of copper nanoparticles (CuNPs) – in terms of percentage copper(I/II) oxides – can be varied by the presence of N-donor ligands during their formation via laser ablation. Changing the chemical composition thus allows systematic tuning of the surface plasmon resonance (SPR) transition. The trialed ligands include pyridines, tetrazoles, and alkylated tetrazoles. CuNPs formed in the presence of pyridines, and alkylated tetrazoles exhibit a SPR transition only slightly blue shifted with respect to CuNPs formed in the absence of any ligand. On the other hand, the presence of tetrazoles results in CuNPs characterized by a significant blue shift of the order of 50–70 nm. By comparing these data also with the SPR of CuNPs formed in the presence of carboxylic acids and hydrazine, this work demonstrates that the blue shift in the SPR is due to tetrazolate anions providing a reducing environment to the nascent CuNPs, thus preventing the formation of copper(II) oxides. This conclusion is further supported by the fact that both AFM and TEM data indicate only small variations in the size of the nanoparticles, which is not enough to justify a 50–70 nm blue-shift of the SPR transition. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) studies further confirm the absence of Cu(II)-containing CuNPs when prepared in the presence of tetrazolate anions.

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Section: ■ Results and Discussioncontrasting

confidence: 75%

Section: Resultscontrasting

confidence: 65%

Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation

et al. 2023

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“…Zhou et al explained that the improved ΔT sol is related to the surface plasma resonance (SPR) of the metal-phase VO 2 NPs, which is located at approximately 1200 nm and significantly enlarges the transmittance difference at low and high temperatures. 132 Coskun et al 133 investigated the surface plasma resonance by using the metallic nanoparticle boundary element method (MNBEM) for VO 2 nanospheres and found that the intensity is almost constant up to 60 nm in diameter and decreases rapidly between 60 and 240 nm. Furthermore, Li et al 134 extended their model to VO 2 -based core/shell structures by using VO 2 as the core and then as the shell.…”

Section: Elemental Dopingmentioning

confidence: 99%

Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives

Zhang

Zhou

et al. 2023

Chem. Rev.

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Thermochromic energy efficient windows represent an important protocol technology for advanced architectural windows with energy-saving capabilities through the intelligent regulation of indoor solar irradiation and the modulation of window optical properties in response to real-time temperature stimuli. In this review, recent progress in some promising thermochromic systems is summarized from the aspects of structures, the micro-/mesoscale regulation of thermochromic properties, and integration with other emerging energy techniques. Furthermore, the challenges and opportunities in thermochromic energy-efficient windows are outlined to promote future scientific investigations and practical applications in building energy conservation.

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Applications of optical control materials based on localized surface plasmon resonance effect in smart windows

Ta,

Huang,

et al. 2024

Tungsten

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Optical properties of VO2 spherical nanoparticles

Cited by 5 publications

References 35 publications

Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation

Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation

Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives

Applications of optical control materials based on localized surface plasmon resonance effect in smart windows

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