کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
598390 1454088 2006 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Equilibrium shapes and locations of axisymmetric, liquid drops on conical, solid surfaces
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Equilibrium shapes and locations of axisymmetric, liquid drops on conical, solid surfaces
چکیده انگلیسی

Micro- and nano-scale liquid droplets must be precisely placed in proximity to conical solid tips in applications that include AFM tip dip-pen nanolithography. This seemingly simple task is strongly dependent on wetting conditions of the drop on the tip surface. Over a wide range of wetting conditions and drop volumes, drops can situate far from a conical needle apex at equilibrium, which can hinder the effectiveness of the respective applications. Needle geometry also affects drop location. On a right conical needle, liquid drops that wet the needle surface locate away from the apex. However, by careful consideration of their geometry, needles can be engineered to retain liquid drops near the tip or some other region of interest. In this work, a theoretical model is developed that predicts axisymmetric, equilibrium drop locations and shapes on conical, solid surfaces as a function of drop volume, needle geometry/shape, needle surface wettability (contact angle), liquid surface tension, line tension, and gravity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 282–283, 20 July 2006, Pages 227–239
نویسندگان
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