Department of Chemistry, University of Oxford, Physical and Theoretical Chemistry Laboratory, Oxford, UK.
Lab Chip. 2011 Dec 7;11(23):3953-5. doi: 10.1039/c1lc20854c. Epub 2011 Oct 21.
Broadband cavity-enhanced absorption spectroscopy has been used to record, in real time, the absorption spectrum of microlitre volume aqueous phase droplets within a microfluidic chip assembly. Using supercontinuum radiation and broadband coated external mirrors, the full visible spectrum (430 nm < λ < 700 nm) of each passing droplet is acquired in situ at high repetition rates (273 Hz/3.66 ms acquisition time) and high sensitivity (α(min) < 10(-2) cm(-1)). The possibilities for further improvements in sensitivity and acquisition rate using custom designed chips are discussed.
宽带腔增强吸收光谱已被用于实时记录微流控芯片组件中微升体积水相液滴的吸收光谱。利用超连续辐射和宽带镀膜外反射镜，以高重复率（273 Hz/3.66 ms 采集时间）和高灵敏度（α(min) < 10(-2) cm(-1))原位获取每个通过液滴的整个可见光谱（430nm < λ < 700nm）。讨论了使用定制设计的芯片进一步提高灵敏度和采集速度的可能性。
