期刊
ANALYTICAL CHEMISTRY
卷 85, 期 9, 页码 4567-4577出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac400200x
关键词
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资金
- U.S. National Science Foundation [CBET 0923408, CBET 0935995, GRFP 2011081805, IGERT DGE 0903667]
- Riverside Public Utilities
- Directorate For Engineering [0923408] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [0923408] Funding Source: National Science Foundation
This article describes the utilization of laminar microflows for time resolved emission measurements with steady-state excitation and detection. Passing a laminar flow through a short illuminated section of a microchannel provided a means for pulsed like photoexcitation of the moieties carried by the fluid Imaging the microchannel flows carrying thus photoexcited chelates of lanthanide ions allowed us to extract their excited state lifetimes from the spatial distribution of the change's in emission intensity. The lifetime values obtained using this space domain approach agreed well with the lifetimes from time domain measurements. This validated space domain microfluidic approach reveals a means for miniaturization of time resolved emission spectroscopy.
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