银岛膜对镧系螯合物发光强度和衰减时间的影响。
Effects of Silver Island Films on the Luminescent Intensity and Decay Times of Lanthanide Chelates.
作者信息
Lakowicz Joseph R, Maliwal Badri P, Malicka Joanna, Gryczynski Zygmunt, Gryczynski Ignacy
机构信息
University of Maryland School of Medicine, Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, 725 West Lombard Street, Baltimore, Maryland 21201.
University of Gdansk, Faculty of Chemistry, Sobieskiego 18, 80-952 Gdansk, Poland.
出版信息
J Fluoresc. 2002 Dec;12(3-4):431-437. doi: 10.1023/A:1021318127519.
We examined the emission intensity and decay times of chelates Tb and Eu in micron thick samples between films of sub-wavelength size silver particles. We observed modest increases in emission intensities for the complexes between the silver particles as compared to between unsilvered quartz plates. The intensity decay times were dramatically decreased by the silver particles, which was in part mediated by diffusion toward the silver particles. These results indicated that luminescent lanthanides in close proximity to silver particles display increased rates of radiative decay. The use of luminophore-metallic surface interactions provides new opportunities for creation of luminescent probes with novel spectral properties.
我们研究了在亚波长尺寸银颗粒薄膜之间的微米厚样品中螯合物铽（Tb）和铕（Eu）的发射强度和衰减时间。我们观察到，与未镀银的石英板之间相比，银颗粒之间的配合物发射强度有适度增加。银颗粒使强度衰减时间显著缩短，这部分是由向银颗粒的扩散介导的。这些结果表明，靠近银颗粒的发光镧系元素显示出更高的辐射衰减速率。发光体与金属表面相互作用的应用为创造具有新颖光谱特性的发光探针提供了新机会。
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