Rapid point-of-care concentration of bacteria in a disposable microfluidic device using meniscus dragging effect.
Rapid point-of-care concentration of bacteria in a disposable microfluidic device using meniscus dragging effect.
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DOI：
10.1039/c0lc00051e
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发表时间：
2010-12-07
期刊：
影响因子：
6.1
通讯作者：
Klapperich CM
中科院分区：
文献类型：
--
作者：
Zhang JY;Do J;Premasiri WR;Ziegler LD;Klapperich CM
We report a low cost, disposable polymer microfluidic sample preparation device to perform rapid concentration of bacteria from liquid samples using enhanced evaporation targeted at downstream detection using surface enhanced Raman spectroscopy (SERS). The device is composed of a poly(dimethylsiloxane) (PDMS) liquid sample flow layer, a reusable metal airflow layer, and a porous PTFE (Teflon ™) membrane sandwiched in between the liquid and air layers. The concentration capacity of the device was successfully demonstrated with fluorescently tagged Escherichia coli (E. coli). The recovery concentration was above 85% for all initial concentrations lower than 1 × 104 CFU mL−1. In the lowest initial concentration cases, 100 μL initial volumes of bacteria solution at 100 CFU mL−1 were concentrated into 500 nL droplets with greater than 90% efficiency in 15 min. Subsequent tests with SERS on clinically relevant Methicillin-Sensitive Staphylococcus aureus (MSSA) after concentration in this device proved more than 100-fold enhancement in SERS signal intensity compared to the signal obtained from the unconcentrated sample. The concentration device is straightforward to design and use, and as such could be used in conjunction with a number of detection technologies.
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影响因子：
6.1
作者：
Walker, GM;Beebe, DJ
通讯作者：
Beebe, DJ
影响因子：
7.4
作者：
Jarvis, RM;Goodacre, R
通讯作者：
Goodacre, R
影响因子：
3.3
作者：
Premasiri, WR;Moir, DT;Ziegler, LD
通讯作者：
Ziegler, LD
影响因子：
6.1
作者：
Lay, Christophe;Teo, Cheng Yong;Liu, Wen-Tso
通讯作者：
Liu, Wen-Tso
影响因子：
15
作者：
Zhang, XY;Young, MA;Van Duyne, RP
通讯作者：
Van Duyne, RP