کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7845129 1508426 2014 41 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The debate on the dependence of apparent contact angles on drop contact area or three-phase contact line: A review
ترجمه فارسی عنوان
بحث در مورد وابستگی زاویه تماس آشکار به منطقه تماس قطره یا خط سه فاز: بررسی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
A sessile drop is an isolated drop which has been deposited on a solid substrate where the wetted area is limited by the three-phase contact line and characterized by contact angle, contact radius and drop height. Although, wetting has been studied using contact angles of drops on solids for more than 200 years, the question remains unanswered: Is wetting of a rough and chemically heterogeneous surface controlled by the interactions within the solid/liquid contact area beneath the droplet or only at the three-phase contact line? After the publications of Pease in 1945, Extrand in 1997, 2003 and Gao and McCarthy in 2007 and 2009, it was proposed that advancing, receding contact angles, and contact angle hysteresis of rough and chemically heterogeneous surfaces are determined by interactions of the liquid and the solid at the three-phase contact line alone and the interfacial area within the contact perimeter is irrelevant. As a consequence of this statement, the well-known Wenzel (1934) and Cassie (1945) equations which were derived using the contact area approach are proposed to be invalid and should be abandoned. A hot debate started in the field of surface science after 2007, between the three-phase contact line and interfacial contact area approach defenders. This paper presents a review of the published articles on contact angles and summarizes the views of the both sides. After presenting a brief history of the contact angles and their measurement methods, we discussed the basic contact angle theory and applications of contact angles on the characterization of flat, rough and micropatterned superhydrophobic surfaces. The weak and strong sides of both three-phase contact line and contact area approaches were discussed in detail and some practical conclusions were drawn.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science Reports - Volume 69, Issue 4, December 2014, Pages 325-365
نویسندگان
,