An organic semiconductor laser based on star-shaped truxene-core oligomers for refractive index sensing
An organic semiconductor laser based on star-shaped truxene-core oligomers for refractive index sensing
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DOI：
10.1016/j.snb.2013.04.026
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发表时间：
2013-08
影响因子：
8.4
通讯作者：
Anne-Marie Haughey;B. Guilhabert;A. Kanibolotsky;P. Skabara;G. Burley;M. Dawson;N. Laurand
中科院分区：
文献类型：
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作者：
Anne-Marie Haughey;B. Guilhabert;A. Kanibolotsky;P. Skabara;G. Burley;M. Dawson;N. Laurand
描述了基于星形 truxene 核分子的全有机半导体分布式反馈激光器的传感能力。提出了两种测定作为原理验证演示。首先，使用每折射率单位 21 nm 的批量检测灵敏度测量 5–60% (v/v) 甘油水溶液的浓度变化。其次，测量了聚电解质对激光表面的逐层吸附，厚度可达约 45 nm。两种测定的实验结果与理论模型进行了比较，并显示与理论模型一致。这种类型的有机半导体激光器具有许多吸引力，包括易于大规模制造、合并到现有的分析设备中以及对激发和发射收集没有严格的光学对准限制，这使得它们非常适合传感应用。因此，预计该技术将可用于研究无标记样品的生物传感应用。
The sensing capabilities of an all-organic semiconductor distributed feedback laser based on star-shaped truxene-core molecules are described. Two assays are presented as a proof-of-principle demonstration. In the first, concentration changes in the range of 5–60% (v/v) glycerol solution in water were measured with a bulk detection sensitivity of 21nm per refractive index unit. Secondly, layer-by-layer adsorption of polyelectrolytes to the laser surface, up to a thickness of ≈45nm, was measured. The experimental results from both assays are compared to, and shown to agree with, a theoretical model. Organic semiconductor lasers of this type have a number of attractions including ease of large-scale fabrication, incorporation into existing assay equipment and no rigid optical alignment constraints for excitation and collection of emission, which makes them well-suited to sensing applications. Therefore, it is expected that this technology will be useful in biosensing applications where label-free samples are investigated.