激光与光电子学进展, 2019, 56 (20): 202410, 网络出版: 2019-08-30
连续激光诱导金纳米棒荧光增强效应 
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Continuous Laser Induced Photoluminescence Enhancement of Au Nanorods
图 & 表
图 1. 金纳米棒的形貌与光学表征。(a) NR-40-600的SEM图像;(b)消光光谱;(c)归一化散射光谱;(d)荧光光谱
Fig. 1. Morphological and optical characterizations of Au nanorods. (a) SEM image of NR-40-600; (b) extinction spectra; (c) normalized scattering spectra; (d) photoluminescence spectra
图 2. 激光照射时金纳米棒的形貌与光学特性的变化。(a)经激光照射后NR-40-600的SEM图像;(b) 5种金纳米棒荧光增强 因子的典型变化轨迹;(c) NR-40-600的荧光光谱随波长的变化;(d) NR-40-600荧光光谱峰值随照射时间的变化
Fig. 2. Morphological and optical characteristic variations of Au nanorods during laser irradiation. (a) SEM image of NR-40-600 after laser irradiation; (b) typical PL enhancement factors of five kinds of Au nanorods;(c) PL spectrum versus wavelength of NR-40-600; (d) PL peak value versus irradiation duration of NR-40-600
图 3. 5种金纳米棒达到最大荧光强度时Fm及Tm的统计结果。(a)(f) NR-40-600;(b)(g) NR-40-650; (c)(h) NR-40-700;(d)(i) NR-10-780;(e)(j) NR-20-780
Fig. 3. Maximum PL enhancement factor Fm and the corresponding irradiation duration Tm of five Au nanorods. (a)(f) NR-40-600; (b)(g) NR-40-650; (c)(h) NR-40-700; (d)(i) NR-10-780; (e)(j) NR-20-780
图 4. 照射波长对金纳米棒荧光增强效果的影响。(a)金纳米棒能级示意图;(b) NR-40-600与NR-10-780两种金纳米棒在不同激发波长下的最大荧光增强因子Fm;(c) NR-40-600与NR-10-780两种金纳米棒在不同激发波长下的照射时间Tm(空心点为拟合所得中心值,彩色带为对应的标准差)
Fig. 4. PL enhancement of Au nanorods under different laser wavelengths. (a) Schematic of Au nanorods energy levels; (b) Fm of NR-40-600 and NR-10-780 under irradiation at different laser wavelengths; (c) Tm of NR-40-600 and NR-10-780 under irradiation at different laser wavelengths (hollow dots are central values of Gauss fittings, color bars denote corresponding standard deviations)
图 5. 功率密度对金纳米棒荧光增强效果的影响。(a) NR-40-600金纳米棒在不同功率密度下的Fm;(b) NR-40-600金纳米棒在不同功率密度下的Tm;(c) NR-10-780金纳米棒在不同功率密度下的Fm;(d) NR-10-780金纳米棒在不同功率密度下的Tm
Fig. 5. Effect of power density on PL enhancement of Au nanorods. (a) Fm of NR-40-600 under different power densities; (b) Tm of NR-40-600 under different power densities; (c) Fm of NR-10-780 under different power densities; (d) Tm of NR-10-780 under different power densities
表 15种金纳米棒的形貌和光学参数
Table1. Morphological and optical parameters of five kinds of Au nanorods
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张文学, 张晓荣, 秦成兵, 肖连团. 连续激光诱导金纳米棒荧光增强效应[J]. 激光与光电子学进展, 2019, 56(20): 202410. Wenxue Zhang, Xiaorong Zhang, Chengbing Qin, Liantuan Xiao. Continuous Laser Induced Photoluminescence Enhancement of Au Nanorods[J]. Laser & Optoelectronics Progress, 2019, 56(20): 202410.
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