Unraveling the liquid gliding on vibrating solid liquid interfaces with dynamic nanoslip enactment

Abstract

Slip length describes the classical no-slip boundary condition violation of Newtonian fluid mechanics, where fluids glide on the solid surfaces. Here, we propose a new analytical model validated by experiments for characterization of the liquid slip using vibrating solid surfaces. Essentially, we use a microfluidic system integrated with quartz crystal microbalance (QCM) to investigate the relationship between the slip and the mechanical response of a vibrating solid for a moving fluid. We discover a liquid slip that emerges especially at high flow rates, which is independent of the surface wetting condition, having significant contributions to the changes in resonant frequency of the vibrating solid and energy dissipation on its surface. Overall, our work will lead to consideration of ‘missing slip’ in the vibrating solid-liquid systems such as the QCM-based biosensing where traditionally frequency changes are interpreted exclusively with mass change on the sensor surface, irrespective of the flow conditions.

Modeling and Analysis of the Capillary Force for Interactions of Different Tip/Substrate in AFM Based on the Energy Method

“…Particle coalescence/agglomeration resulting from liquid bridge adhesion plays a significant role in various vital areas such as the pharmaceutical and food industry, 1−3 soft matter and cell biology, 4,5 controlling the fluid flow, 6 and solid−liquid interfaces. 7 Capillary force is a meniscus force due to condensation typically observed in a wet medium. To model and simulate the capillary force, the nonlinearity of the capillary equation combined with the variety of substrate geometries leads to a large number of solutions.…”

“…The study of capillary force has a long-time history and is considered a multidisciplinary field of research. Particle coalescence/agglomeration resulting from liquid bridge adhesion plays a significant role in various vital areas such as the pharmaceutical and food industry, − soft matter and cell biology, , controlling the fluid flow, and solid–liquid interfaces …”

Recognizing the Less Explored “Active Solid”–“Moving Liquid” Interfaces in Bio/Chemical Sensors

“…A recent example of such a study is demonstrated by Payam et al 6 Here, the authors discover a "missing liquid slip" in the…”

“…A recent example of such a study is demonstrated by Payam et al Here, the authors discover a “missing liquid slip” in the vibrating solid–liquid systems such as the QCM-based biosensor (Figure a shows their system) where traditionally frequency and dissipation changes were interpreted exclusively with mass change on the sensor surface, irrespective of the flow conditions. To some extent the study also argued the origin of the liquid slip by correlating the slip to a large extent with the flow rate of the liquid, rather than the surface wetting conditions.…”

“…The repercussion of this slender cognizance of solid–liquid interfacial phenomenon is manifested in the form of overestimation/underestimation of mass which binds on the surface of the sensor. There are several examples of various transducers which are reported to overestimate the amount of analyte detected when correlated with the equations/models that govern their signal response. , Nevertheless, recent works have discovered events such as “liquid slip” previously totally ignored in the response of QCM sensor. , Along similar lines, it remains to be understood if such effects exist in a range of electrochemical and optical sensors that measure binding kinetics in continuous flow conditions of the fluid.…”