کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6999545 1454591 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
One-way wicking in open micro-channels controlled by channel topography
ترجمه فارسی عنوان
چرخش یک طرفه در کانال های میکرو کانال باز توسط توپوگرافی کانال کنترل می شود
کلمات کلیدی
وایکینگ جهت، اثر تنش سطحی، کاپیتالیسم، زاویه تماس، فشار لاپاروس، منیسک سه بعدی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی
One-way wicking (microfluidic diode) behaviors of a range of IPA-water mixtures on internally structured PDMS-based open micro-channels were experimentally demonstrated and quantified. The open microfluidic channels, each internally decorated with an array of angled fin-like-structure pairs, were fabricated using a combined photolithography and soft molding procedure. Propagations of wetting fluids were found to be much more impeded on the fin-tilting direction, or the hard wicking direction, comparing to the opposite direction, or the easy wicking direction. This asymmetric wicking behaviors were attributed to the structure-induced direction-dependent Laplace pressure. Two key parameters - the contact angle of the wicking fluid and the tilting angle of the fin-like structures - were studied. The effects of preferential evaporation and wetting instability were also investigated. The findings of this study are expected to provide a better understanding of how fluids interact with micro-scaled structures and to offer a new way of manipulating fluids at the micron and nanometer scales.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 404, 15 August 2013, Pages 169-178
نویسندگان
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