scholarly journals Determination of Surface Energy by Means of Home-Made Goniometer and Image Analyzing Software for Contact Angle Measurement

2013 ◽  
Vol 57 (4) ◽  
pp. 432-438 ◽  
Author(s):  
Seo-Rin Cho ◽  
Han-Gook Cho
Keyword(s):  
Contact Angle ◽  
Surface Energy ◽  
Contact Angle Measurement ◽  
Angle Measurement

scholarly journals Contact Angle Measurement for The Surface Characterization of Solids

2011 ◽  
Vol 2 ◽  
pp. 1-4 ◽  
Author(s):  
D. P. Subedi
Keyword(s):  
Contact Angle ◽  
Surface Energy ◽  
Surface Characterization ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Liquid Model ◽  
Convenient Approach ◽  
Young's Equation

This paper reports a description of the theory of contact angle measurement and its use for the determination of surface energy of solids. The main objective of the work is to present a convenient approach to explain wetting phenomenon using contact angle theory. A brief review of Young’s equation and Young- Dupre equation is also presented followed by an extended Fowke’s equation widely used for the calculation of surface energy of solids. The two liquid model has been applied to determine the surface energy of polycarbonate and low density polyethylene.Key words: Contact angle; Surface energy; Surface characterization; Wettability; Young’s equation; Fowke’s modelThe Himalayan Physics Vol.2, No.2, May, 2011Page:1-4Uploaded Date: 31 July, 2011

scholarly journals THE CONTACT ANGLE CONTROL OF THE SOLDER FOR IMPROVING THE SOLDERING QUALITY

2021 ◽  
pp. 161-166
Author(s):  
Чуйко М.М. ◽  
Завальський В.
Keyword(s):  
Contact Angle ◽  
Sessile Drop ◽  
Electrical Contact ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Soldering Process ◽  
Basic Parameters ◽  
The Right

High quality of the soldering process can be achieved with the right choice of the necessary soldering materials. Since wetting determines the further nature of the connection between the solder and the main soldering material, the contact angle  measurement  is the basis for quality control of soldering materials, provided that the basic requirements of the technological process. The determination of the contact angle value is carried out by the indirect method of the sessile drop, by measuring the basic parameters of the drop using infrared transducer. A smaller value of the contact angle corresponds to a better interaction of materials, and hence a better electrical contact

EFFECT OF Nd:YAG LASER MELTING ON SURFACE ENERGY OF AZ91D Mg ALLOY

2009 ◽  
Vol 16 (06) ◽  
pp. 801-806 ◽  
Author(s):  
Y. C. GUAN ◽  
W. ZHOU ◽  
H. Y. ZHENG
Keyword(s):  
Contact Angle ◽  
Surface Energy ◽  
Laser Irradiation ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Laser Surface ◽  
Laser Melting ◽  
Acid Base ◽  
Az91d Magnesium Alloy ◽  
Drastic Increase

Laser surface melting is known to alter surface energy and wettability of a few engineering materials, but its effect on magnesium alloys has never been reported. Effort was made to study how Nd : YAG laser irradiation influenced surface energy of an AZ91D magnesium alloy. Contact angle measurement was carried out using three types of liquids to make it possible to calculate the surface energy quantitatively based upon the acid–base theory. The laser irradiation was found to enhance surface wettability significantly and lead to a drastic increase in surface energy from 25.82 to 40.78 mJ/m2. The change in surface property was attributed to the laser-induced refinement of α- Mg and β- Mg 17 Al 12 phases and enrichment of Al in the microstructure.

scholarly journals A Bespoke Contact Angle Measurement Software and Experimental Setup for Determination of Surface Tension

2013 ◽  
Vol 11 ◽  
pp. 487-494 ◽  
Author(s):  
Chin Fhong Soon ◽  
Wan Ibtisam Wan Omar ◽  
Nafarizal Nayan ◽  
Hatijah Basri ◽  
Martha Bt. Narawi ◽  
...  
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Experimental Setup ◽  
Measurement Software

EFFECT OF SURFACE PROPERTIES ON THE WETTABILITY OF IRON CONTAINING AMORPHOUS CARBON FILMS

2002 ◽  
Vol 16 (06n07) ◽  
pp. 1031-1037 ◽  
Author(s):  
J. S. CHEN ◽  
S. P. LAU ◽  
Z. SUN ◽  
G. Y. CHEN ◽  
Y. J. LI ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Energy ◽  
Amorphous Carbon ◽  
Photoelectron Spectroscopy ◽  
Contact Angle Measurement ◽  
Carbon Films ◽  
Angle Measurement ◽  
Vacuum Arc ◽  
Polar Component ◽  
Dispersive Component

Ta-C and iron containing amorphous carbon (a-C:Fe) films were deposited by filtered cathodic vacuum arc technique. The influences of Fe contents on the wettability of the films were investigated in terms of surface energy. The surface energy of a-C:Fe films was determined by the contact angle measurement. Atomic force microscopy (AFM), Raman spectroscopy and X-ray induced photoelectron spectroscopy (XPS) were employed to analyze the origin of the variation of surface energy with various Fe content. It is found that the contact angle for water increases significantly after incorporating Fe into the films and the films become hydrophobic. The roughness of these films has a little effect on the contact angle. The surface energy is reduced after incorporating Fe into the a-C film which is due to the reduction of both dispersive and polar component. The reduction in dispersive component is ascribed to the decrease of atomic density of the a-C:Fe films due to the increase in sp2 bonded carbon. The absorption of oxygen on the surface play an important role in the reduction of polar component for the a-C:Fe films. It is proposed that such network as (Ca-O-Fe)-O-(Fe-O-Ca) may be formed and responsible for the reduction of polar component.

Rapid Determination of Organic Contaminations on Wafer Surfaces

2014 ◽  
Vol 219 ◽  
pp. 317-319
Author(s):  
Sylke Meyer ◽  
Sebastian Timmel ◽  
Christian Hagendorf
Keyword(s):  
Contact Angle ◽  
Organic Carbon ◽  
Rapid Determination ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Simple Contact ◽  
Wafer Surfaces ◽  
Detrimental Impact ◽  
Semiconductor Type

Irrespective of the semiconductor type and technology, organic contaminations on wafer surfaces have a detrimental impact on subsequent manufacturing steps and/or the device function. Therefore, it is of great interest to have a quick and reliable tool to detect those contaminations with sufficient sensitivity. In this study we investigated and optimized two methods which have the potential for in-line analytics since they are fast and simple: contact angle measurement and total organic carbon (TOC) determination. We present data on silicon wafer surfaces; however, the techniques may be suitable for all other wafer surfaces, too.

Anti-Sticking Properties of PVD CrWNx, CrOx and ZrOx Coatings on Medical Electrode Application

2010 ◽  
Vol 297-301 ◽  
pp. 656-663
Author(s):  
Y.L. Hsu ◽  
C.H. Lee ◽  
S.M. Chiu ◽  
Y.C. Sung ◽  
K.Y. Yang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Energy ◽  
High Surface ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Polar Component ◽  
In Vitro Test ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron

The side effect of electrosurgery includes tissue charring, smoke generation and the adhesion of tissue to electrodes. These effects prolong surgery and interfere with effective coagulation. In this paper, CrWNx, CrOx and ZrOx coating were prepared by an unbalanced magnetron sputtering. The microstructure of films was characterized using XRD, XPS, TEM and AFM. The hydrophobicity and surface energy of coatings were calculated by contact angle measurement and Wu harmonic mean approach. Anti-sticking in vitro test was performed by monopolar electrosurgery using pork liver tissue. The hardness of CrWNx , ZrOx and CrOx coatings were 44 GPa, 26.3 GPa and 20.7 GPa, respectively. The CrOx coating had the lowest surface energy 33.5 mN/m and the highest contact angle of water as high as 103°. The high surface O-H bonds density of CrOx coating and N-H bonds density of CrWNx coating could explain about their lower polar component of surface energy. All the three PVD coatings remarkably reduced the quantity of tissue adhesion on the electrode from about 2 times (ZrOx and CrWNx coatings) to 4.88 times (CrOx coating) than uncoated SUS304 electrode.

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