A novel leaky waveguide grating (LWG) device for evanescent wave broadband absorption spectroscopy in microfluidic flow cells.
A novel leaky waveguide grating (LWG) device for evanescent wave broadband absorption spectroscopy in microfluidic flow cells.
复制标题
一种新型漏波导光栅（LWG）装置，用于微流体流动池中的倏逝波宽带吸收光谱。
DOI：
10.1039/c3an36714b
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
N. Goddard
中科院分区：
文献类型：
--
作者：
Ruchi Gupta;N. Goddard
消逝波(EW)宽带吸收光谱通常与包括微流控流动池在内的一系列分析系统相连接，用于识别和定量物种。与微流控流动池集成的微型光谱仪可用于样品的现场分析。这项工作报告了一种新型的漏波导栅(LWG)器件，它能够在不需要外部光谱仪的情况下获得感兴趣的分析物(在这种情况下，亚甲基蓝)的吸收光谱。在600 nm处，LWG器件的光谱分辨率为49.5 nm，最小可探测吸收系数为1.65 cm(-1)。由于该器件的性能与激发源的偏振无关，因此可以在塑料等双折射衬底上制造LWG。LWG器件是使用微接触印刷制造的，因此可以很容易地大规模生产。
Evanescent wave (EW) broadband absorption spectroscopy is commonly interfaced with a range of analytical systems, including microfluidic flow cells, for identification and quantitation of species. A miniaturised spectrometer integrated with a microfluidic flow cell is useful to permit on-site analysis of samples. This work reports a novel leaky waveguide grating (LWG) device, which is able to obtain an absorption spectrum of an analyte of interest (in this case, methylene blue) without an external spectrometer. At 600 nm, the spectral resolution and the minimum detectable absorption coefficient of the LWG device is 49.5 nm and 1.65 cm(-1), respectively. The LWG can be fabricated on birefringent substrates such as plastics because the performance of the device is independent of the polarisation of the excitation source. The LWG device was fabricated using microcontact printing and hence can be easily mass produced.
影响因子：
56.9
作者：
JACKMAN, RJ;WILBUR, JL;WHITESIDES, GM
通讯作者：
WHITESIDES, GM