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为了解决金纳米颗粒在构建金属流体时存在的紫外-蓝光波段吸收较弱的问题,提出可采用由种子生长法制备的金核银壳纳米棒,该结构可将金纳米棒的局域表面等离激元共振(LSPR)移向紫外-蓝光波段,在有效增强这一波段光吸收的同时,不会影响透明窗口的透射率。实验结果表明,这种由不同尺寸的金纳米棒和金核银壳纳米棒所构成的胶体溶液,能够使紫外-蓝光波段透射率降低到1%以下,在3001100 nm光谱范围内实现了较好的宽带吸收,同时在中心波长730 nm附近获得了一个透明窗口,其带宽约为150 nm,透射率大于40%。这种由贵金属纳米颗粒胶体溶液所构成的具有窄带透明窗口的流体吸收器的制备方法相对简单,有望用于太阳电池、传感等领域。
Abstract：In order to solve the problem of weak absorption of gold nanoparticles in the ultraviolet-blue band during the construction of metal fluid,the Au-core Ag-shell nanorods prepared by the seed-mediated growth method were used to adjust the localized surface plasmon resonances(LSPR)of gold nanorod to the ultraviolet-blue spectral range.The corresponding absorption can be effectively enhanced without affecting the transmissivity of the transparent window at the same time.The experimental results indicate that by using the colloidal solutions composed of gold nanorods and Au-core Ag-shell nanorods with different sizes,the transmissivity in the ultravioletblue spectral range can be reduced to less than 1%,and the good broadband absorption is achieved at the spectral range of 300-1 100 nm.A transparent window is obtained at the center wavelength of around 730 nm,the bandwidth is about 150 nm and the transmissivity is larger than 40%.The preparation method of the fluid absorber with narrow band transparent window made up of noble metal nanoparticles colloid solution is relatively simple,and is expected to be used in the fields of solar cells and sensing.
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基本信息:
DOI：10.13250/j.cnki.wndz.2018.07.002
中图分类号:O614.123;TB383.1
引用信息:
[1]张军磊,张垚,范晋丽等.具有窄带透明窗口的金属纳米颗粒流体吸收器[J].微纳电子技术,2018,55(07):468-474.DOI:10.13250/j.cnki.wndz.2018.07.002.
基金信息:
山西省自然科学基金资助项目(2012021010-3)