Fluorescence Enhancement Effect of Silver Nanoparticles with Different Surface Modifiers and Sizes
WANG Yue-hui1, XIONG Na-na2, ZHOU Ji3
1. Department of Chemistry and Biology, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China 2. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China 3. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Abstract：Silver nanoparticles were prepared by chemical method using citricacid trisodiumsalt (Ag-CTS) and polyvinylpyrrolidone (Ag-PVP) as surface modifiers, respectively. When Ag-CTS or Ag-PVP nanoparticles were added into methyl orange (MO) solution, the enhanced-fluorescence of S1→S0 and quenched-fluorescence of S2→S0 were simultaneously observed. However, for the solution containing Ag-PVP, the red-shift of fluorescence peak of S1→S0 was observed and the extents of the enhanced-fluorescence of S1→S0 and quenched-fluorescence of S2→S0 are higher than those of the solution containing Ag-CTS. With the increase in reaction time the fluorescence intensity of S1→S0 increased gradually in the solution containing Ag-CTS nanoparticles and no change was observed in the solution containing Ag-PVP nanoparticles. The lower the MO concentration, the higher the fluorescence intensity ratio of S1→S0. The results indicated that the silver nanoparticles with different surface modifiers affect the metal-enhanced fluorescence by impacting the distance between the methyl orange and silver nanoparticles. The size of silver nanoparticles affects the metal-enhanced fluorescence due to the difference in the surface plasma resonance properties.
[1] Lakowicz J R. Anal. Biochem., 2004, 324(2): 153. [2] Ma J, Oram M, Lakowicz J R, et al. J. Mol. Biol., 2010, 395(5): 1102. [3] Zhang J, Fu Y, Mei Y, et al. Anal. Chem., 2010, 82: 4464. [4] Fu Y, Zhang J, Lakowicz J R. J. Am. Chem. Soc., 2010, 132(16): 5540. [5] Zhang J, Fu Y, Jiang F, et al. J. Phys. Chem. C, 2010, 114(26): 7653. [6] Szmacini H, Ray K, Lakowicz J R. Anal. Biochem., 2009, 385: 358. [7] Zhang Y, Dragan A, Geddes C D. J. Phys. Chem. C, 2009, 113(28): 12095. [8] Dragan A I, Zhang Y, Geddes C D. J. Fluoresc., 2009, 19: 369. [9] Aslan K, Geddes C D. Appl. Phys. Lett., 2009, 94: 073104-1. [10] WANG Yue-hui, ZHU Yi-shui, ZHU Shuo-xuan(王悦辉，朱一水，朱朔萱). Chinese Journal of Inorganic Chemistry(无机化学学报), 2010, 26(8): 1415. [11] WANG Yue-hui, ZHOU Ji, WANG Ting(王悦辉，周 济，王 婷). Chinese Journal of Inorganic Chemistry(无机化学学报), 2008, 24(3): 205. [12] WANG Yue-hui, ZHOU Ji, SHI Shi-kao(王悦辉，周 济，石士考). Chinese Journal of Inorganic Chemistry(无机化学学报), 2006, 22(9): 1549. [13] WANG Yue-hui, SHEN Jian-hong(王悦辉, 沈建红). Acta Phys. -Chim. Sin.(物理化学学报)，2012, 28(6): 1313. [14] ZHANG Ai-ping, FANG Yan(张爱平，方 炎). Acta Physica Sinica(物理学报)，2007, 56(1): 171. [15] Geddes C D, Lakowicz J R. J. Fluorescence, 2002, 12(2): 121. [16] Lakowicz J R. Anal. Biochem.，2001, 298: 1.
