open access

https://doi.org/10.14943/doctoral.k16383

https://hdl.handle.net/2115/97638

Construction of Photonic–Plasmonic Coupling Color Material Combining Structural Colors by Colloidal Particles and Localized Surface Plasmon Resonances by Metal Nitride Nanoparticles

英語

Quasi-amorphous

2025-03-25

Hokkaido University

xii, 163p.

In recent years, structural color materials have garnered significant attention due to their high fade resistance and low toxicity compared to traditional pigments. Structural color materials exploit the physical phenomenon of selective reflection of specific wavelengths of light caused by periodic structures at the scale of the wavelength of light. However, these materials often exhibit angle-dependent reflection, making it challenging to achieve angle-independent coloration. Particle-based structural color materials composed of colloidal particles with sizes comparable to the wavelength of light can reduce angle dependence by forming quasi-amorphous structures with diminished crystallinity of the colloidal crystals. Nevertheless, this approach often results in reduced color contrast due to incoherent scattering. To address this problem, this study aimed to develop structural color materials with tunable reflective properties by introducing metal nitride (MN) nanoparticles into the periodic particle- based structures. These materials combine structural color arising from the periodic structures with localized surface plasmon resonance (LSPR) of the MN nanoparticles, which selectively absorb specific wavelength regions through plasmonic absorption. In this work, the phenomenon where photonic effects from periodic structures and plasmonic absorption from MN nanoparticles coexist is defined as "photonic-plasmonic coupling." Silica (SiO₂) was employed as the structural framework, and MN nanoparticles such as titanium nitride (TiN), zirconium nitride (ZrN), and hafnium nitride (HfN) were used as components for plasmonic absorption at specific wavelength regions. Two types of core-shell particles were synthesized: (1) MN-SiO₂ core-shell particles with MN nanoparticles as cores and SiO₂ as shells, and (2) SiO₂-MN core-shell particles with monodispersed SiO₂ particles as cores and MN nanoparticles adhered to their surfaces. Quasi-amorphous structures were constructed using these core-shell particles, resulting in materials with reduced angle dependence and expression of photonic effects from the periodic SiO₂ structures and plasmonic absorption from MN nanoparticles. This work successfully developed photonic-plasmonic coupling structural color materials with enhanced tunability and functionality.

2025-03-25

甲第16383号

博士(工学)

(主査) 教授 島田 敏宏, 教授 忠永 清治, 教授 松井 雅樹, 准教授 三浦 章

総合化学院（総合化学専攻）

博士論文

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