کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
741208 | 894232 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Monolithic integration of poly(dimethylsiloxane) waveguides and microfluidics for on-chip absorbance measurements
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A monolithic integration of poly(dimethylsiloxane) (PDMS) waveguides and microfluidics is demonstrated by implementing a two-step lithographic moulding. Silicone oil is added in PDMS precursor to tune the refractive index of waveguides with air as the side and top cladding layer. Curved and straight waveguides are characterized for their insertion loss mainly due to propagation, radiation, and transition. Transition and radiation losses are identified dominating along the curves whereas propagation loss increases at a steady rate of 0.249 ± 0.015 dB/cm. With the integrated system, real-time absorbance measurement of fluorescein streams yields a nearly linear response up to 250 μM and the limit of detection <50 μM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 134, Issue 2, 25 September 2008, Pages 532–538
Journal: Sensors and Actuators B: Chemical - Volume 134, Issue 2, 25 September 2008, Pages 532–538
نویسندگان
Jack Sheng Kee, Daniel Puiu Poenar, Pavel Neuzil, Levent Yobas,