کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
738422 894007 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrodynamic fabrication and characterization of a pH-responsive microscale spherical actuating element
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Hydrodynamic fabrication and characterization of a pH-responsive microscale spherical actuating element
چکیده انگلیسی

In this paper, we report a hydrodynamic fabrication method for pH-responsive microspheres, which act as an actuating component, and we characterize their volume-changes according to variations in pH values. We fabricated the microsphere-producing apparatus by using a poly(dimethylsiloxane) (PDMS) based substrate and a pulled-glass pipette. The swelling and the shrinking motions that varied according to the size, the shape and the concentration of AA were characterized with alternating application of acidic and basic solutions. The fabricated microspheres exhibited a larger and a faster volume transition than the cylindrical shaped post, which results generally from a conventional in-situ photopolymerization method. The repeated motions resulting from the alternating change of pH value were stable and reproducible. This finding indicates that the produced microspheres can be used as an actuation component in other microdevices. To exemplify such an application, we integrated a single microsphere into a PDMS-based microfluidic valve, and the fabricated microvalve resulted in stable operations relative to pH change.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 134, Issue 2, 15 March 2007, Pages 321–328
نویسندگان
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