Dr. Kock-Yee Law is a researcher in nanotechnology and surface design with over 120 peer-reviewed publications and 105 granted US patents to date. Dr. Hong Zhao is an Assistant Professor at Virginia Commonwealth University, School of Engineering, Mechanical, and Nuclear Engineering.

• 1.Background.- 2.Contact Angle Measurements and Surface Characterization Techniques.- 3.Wetting on Flat and Smooth Surfaces.- 4.Wetting on Rough Surfaces.- 5.What Do Contact Angles Measure?.- 6.Terminologies and Definitions.- 7 Determination of Solid Surface Tension by Contact Angle.- 8 Summary and Final Remarks.

Dr. Kock-Yee Law is a researcher in nanotechnology and surface design with over 120 peer-reviewed publications and 105 granted US patents to date. Dr. Hong Zhao is an Assistant Professor at Virginia Commonwealth University, School of Engineering, Mechanical, and Nuclear Engineering.

• 1.Background.- 2.Contact Angle Measurements and Surface Characterization Techniques.- 3.Wetting on Flat and Smooth Surfaces.- 4.Wetting on Rough Surfaces.- 5.What Do Contact Angles Measure?.- 6.Terminologies and Definitions.- 7 Determination of Solid Surface Tension by Contact Angle.- 8 Summary and Final Remarks.

Dr. Kock-Yee Law is a researcher in nanotechnology and surface design with over 120 peer-reviewed publications and 105 granted US patents to date. Dr. Hong Zhao is an Assistant Professor at Virginia Commonwealth University, School of Engineering, Mechanical, and Nuclear Engineering.

• 1.Background.- 2.Contact Angle Measurements and Surface Characterization Techniques.- 3.Wetting on Flat and Smooth Surfaces.- 4.Wetting on Rough Surfaces.- 5.What Do Contact Angles Measure?.- 6.Terminologies and Definitions.- 7 Determination of Solid Surface Tension by Contact Angle.- 8 Summary and Final Remarks.