Effect of Surface Hydrophobicity on Critical Pinning Concentration of Nanoparticles To Trigger the Coffee Ring Formation during the Evaporation Process of Sessile Drops of Nanofluids

2015 ◽  
Vol 119 (6) ◽  
pp. 3050-3059 ◽  
Author(s):  
Shih-Yao Lin ◽  
Kai-Chieh Yang ◽  
Li-Jen Chen
Keyword(s):  
Surface Hydrophobicity ◽  
Ring Formation ◽  
Evaporation Process ◽  
Coffee Ring ◽  
Effect Of Surface ◽  
Sessile Drops

Tunable Coffee-Ring Formation of Halloysite Nanotubes by Evaporating Sessile Drops

Soft Matter ◽  
2021 ◽  
Author(s):  
Hongzhong Liu ◽  
Yao Wang ◽  
于敏 卢奥语 ◽  
Min Guo ◽  
Yue Feng ◽  
...  
Keyword(s):  
Self Assembly ◽  
Halloysite Nanotubes ◽  
Ring Formation ◽  
The Self ◽  
One Dimensional ◽  
Coffee Ring ◽  
Assembly Behavior ◽  
Sessile Drops

Halloysite nanotubes (HNTs) are one-dimensional clay nanomaterials with length in 200-1000 nm and diameter of ~50 nm. Understanding the self-assembly behavior of such unique nanoparticle is important to develop their...

Measuring Surface Hydrophobicity as Compared to Measuring a Hydrophobic Effect on Adhesion Events

1995 ◽  
Vol 58 (9) ◽  
pp. 1034-1037 ◽  
Author(s):  
H. AL-MAKHLAFI ◽  
M. LAKAMRAJU ◽  
N. PODHIPLEUX ◽  
B. SINGLA ◽  
J. MCGUlRE
Keyword(s):  
Contact Angle ◽  
Bacteriophage T4 ◽  
Hydrophobic Effect ◽  
Surface Hydrophobicity ◽  
Antimicrobial Proteins ◽  
Hydrophilic Surfaces ◽  
Measuring Surface ◽  
Simple Contact ◽  
Contact Angle Analysis ◽  
Effect Of Surface

Simple contact-angle methods are commonly used to describe surface influences on phenomena including adsorption, adhesion, fouling, and cleaning, However, for the purpose of quantitatively relating surface hydrophobicity to such phenomena, contact-angle analysis may be insufficient. Here we show that even with model hydrophobic and hydrophilic surfaces, measurement of the effect of surface hydrophobicity on adsorption of the antimicrobial proteins nisin and bacteriophage T4 lysozyme yielded conflicting results, apparently because different mechanisms govern events at the interface, depending on surface hydrophobicity. This finding is explained in terms of the presence of two competing mechanisms for attractive associations at these surfaces: hydrophobic and attractive electrostatic associations.

Effect of surface modification on interfacial nanobubble morphology and contact line tension

Soft Matter ◽  
2015 ◽  
Vol 11 (26) ◽  
pp. 5214-5223 ◽  
Author(s):  
Kaushik K. Rangharajan ◽  
Kwang J. Kwak ◽  
A. T. Conlisk ◽  
Yan Wu ◽  
Shaurya Prakash
Keyword(s):  
Atomic Force Microscopy ◽  
Surface Modification ◽  
Contact Line ◽  
Line Tension ◽  
Surface Hydrophobicity ◽  
Saturation State ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mode Atomic Force Microscopy ◽  
Effect Of Surface

Using tapping mode atomic force microscopy, changes to interfacial nanobubble morphology and associated characteristics are analyzed as a function of surface hydrophobicity and solvent–air saturation state.

Heat Transfer and Flow Instabilities in Ethanol Sessile Drops Under Evaporation

2010 ◽  
Author(s):  
Benjamin Sobac ◽  
David Brutin
Keyword(s):  
Heat Transfer ◽  
Sessile Drop ◽  
Scaling Law ◽  
Video Recording ◽  
Infrared Camera ◽  
Theoretical Work ◽  
Evaporation Process ◽  
Drop Evaporation ◽  
Space Resolution ◽  
Sessile Drops

Thanks to a recent increase in space resolution and temperature accuracy of infrared camera device, it’s now possible to perform thermal visualizations of sessile drops under evaporation. Using infrared techniques, we can access local thermal motions inside millimetric drops without perturbing the internal mechanisms. In the full paper, we will provide a literature review of experimental, numerical simulation and theoretical work recently perform on sessile drop evaporation. We will also detail the experimental setup which has been elaborated to realize these thermal observations. Using infrared and visible video recording, we can follow respectively the evolution of the motion inside the drop and the drop shape during evaporation. Using a heat fluxmeter placed below the drop, we can analyze the heat transfer between the substrate and the drop. We will completely describe the evaporation process based on a reference experiment and evidence the existence of several phases during this process. Then, we will dwell on the heat flux transferred to the drop during each step of the evaporation process to obtain very important information about the coupling between flow motion and heat transfer coefficient. Finally, we will present the influence of substrate temperature and drop size on the evaporation process which leads us to build a scaling law and better understand drop evaporation process.

Sign in / Sign up

Export Citation Format

Share Document