Piwnuan Chanakarn, Muangphat Chivarat, Wootthikanokkhan Jatuphorn
Materials Technology Program, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, 126 Pracha Uthit Rd., Bangmod, Thung Khru, Bangkok 10140, Thailand.
Materials (Basel). 2024 Jun 5;17(11):2746. doi: 10.3390/ma17112746.
This research aims to enhance the near-infrared (NIR) shielding ability of cesium tungsten bronze (CsWO) by increasing the spectral absorption in this region through the incorporation of gold nanorods (Au). Two approaches were used to prepare the composite materials: physical mixing and solvothermal process. The effects of gold nanorods content on the crystalline size, particle size, shape, and optical properties of the composite were investigated systematically using DLS, TEM, XRD, and UV-Vis spectroscopy techniques, respectively. The physical mixing process synergizes Au and CsWO into a composite which has better NIR absorption than that of neat Au and CsWO nanorods. A composite with 10 mol% of Au shows the highest NIR absorption ability due to the surface plasmon resonance and energy coupling between Au and CsWO. With the solvothermal process, the CsWO nanorods grow up to 4-7 microns when the Au content increases to 0.8 mol% due to the incorporation of the Au atoms. The microsized CsWO rods have superior NIR shielding property compared to other conditions, including the Au+CsWO nanocomposite with 10 mol% of Au from the physical mixing process.
本研究旨在通过引入金纳米棒（Au）来增强铯钨青铜（CsWO）在近红外（NIR）区域的光谱吸收，从而提高其近红外屏蔽能力。采用了两种方法制备复合材料：物理混合法和溶剂热法。分别使用动态光散射（DLS）、透射电子显微镜（TEM）、X射线衍射（XRD）和紫外可见光谱技术，系统地研究了金纳米棒含量对复合材料的晶体尺寸、粒径、形状和光学性能的影响。物理混合过程使Au和CsWO协同形成一种复合材料，该复合材料的近红外吸收性能优于纯Au和CsWO纳米棒。由于Au与CsWO之间的表面等离子体共振和能量耦合，含有10 mol% Au的复合材料表现出最高的近红外吸收能力。在溶剂热法中，当Au含量增加到0.8 mol%时，由于Au原子的掺入，CsWO纳米棒生长到4-7微米。与其他条件相比，这种微米尺寸的CsWO棒具有优异的近红外屏蔽性能，包括通过物理混合法制备的含有10 mol% Au的Au+CsWO纳米复合材料。
