Boundary slip of the liquid–solid interface of micro/nano fluid flow are of great interest, as slippage is linked with decreased drag in many applications of mirco-/nano-fluidic channels. Previous studies have seldom included a systematic analysis of the effect of roughness on the measurement and quantification of effective boundary slip at interfaces between oil and superoleophilic/superoleophobic surfaces. This study focuses on the measurement and quantification of effective slip length on rough surfaces using atomic force microscopy (AFM). The correction to the effective slip length is analyzed, then surfaces with various degrees of roughness were fabricated. Quantitative analysis of the effective slip length is presented. Results show that the surface roughness could significantly inhibit the degree of effective boundary slip on both superoleophilic surfaces in Wenzel state and superoleophobic surfaces in Cassie state immersed in oil. The oleic systems were likely to inhibit effective boundary slip and resulted in an increasing in drag with increasing roughness at the solid–Liquid interfaces.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.