Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Contact Angle01:13

Contact Angle

17.4K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
17.4K
Design Example: Traverse Angle Computations01:25

Design Example: Traverse Angle Computations

183
Traverse angle computations are a critical component of surveying, used to compute the internal angles within a closed traverse. A traverse consists of a series of connected lines forming a closed loop, often used for land boundary delineation or mapping. Calculating the internal angles ensures accuracy in the traverse geometry and is essential for checking survey data integrity.The process begins with known azimuths and bearings of the traverse sides. Internal angles at each vertex are...
183
Adjusting a Traverse01:12

Adjusting a Traverse

198
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
198
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

192
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
192
Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

498
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
498
Distance Corrections01:15

Distance Corrections

131
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
131

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ice sliding on nanoscale-smooth surfaces and the role of the quasi-liquid layer.

Materials horizons·2026
Same author

Failure is the most likely option.

Materials horizons·2026
Same author

Results of an Interlaboratory Study on the Working Curve in Vat Photopolymerization II: Towards a Standardized Method.

Additive manufacturing·2026
Same author

Towards nickel-titanium shape memory alloys for coatingless icephobic materials.

Materials horizons·2025
Same author

Water-polysaccharide interactions and their properties in freezing conditions.

Carbohydrate polymers·2025
Same author

Spiro-Ometad As A Promising Substrate In Biomedical Devices.

ChemistryOpen·2025

Related Experiment Video

Updated: Oct 31, 2025

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
12:18

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography

Published on: October 21, 2018

14.3K

Contact angle measurements: From existing methods to an open-source tool.

Raziyeh Akbari1, Carlo Antonini1

  • 1Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 55, 20125 Milano, Italy.

Advances in Colloid and Interface Science
|June 29, 2021
PubMed
Summary

Contact angle measurement using digital images is now accessible. This study compares methods and introduces Dropen, an open-source software for robust, automated contact angle analysis, benefiting all lab users.

Keywords:
Contact angleDropenImage analysisMATLABOpen-sourceWetting

More Related Videos

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
07:50

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation

Published on: January 27, 2023

3.1K
Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
10:22

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

Published on: September 7, 2019

8.4K

Related Experiment Videos

Last Updated: Oct 31, 2025

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
12:18

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography

Published on: October 21, 2018

14.3K
Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
07:50

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation

Published on: January 27, 2023

3.1K
Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
10:22

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

Published on: September 7, 2019

8.4K

Area of Science:

  • Surface science
  • Materials characterization
  • Wettability studies

Background:

  • Contact angle measurement is crucial for understanding solid surface properties.
  • Advancements in digital imaging and software have democratized contact angle analysis.
  • Various methods exist for evaluating contact angles from images, each with unique characteristics.

Purpose of the Study:

  • To compare established contact angle measurement techniques from digital images.
  • To introduce and evaluate Dropen, an open-source MATLAB application for automated contact angle analysis.
  • To facilitate contact angle measurements for a wide range of users, from novices to experts.

Main Methods:

  • Comparison of Young-Laplace, circle, and polynomial fitting methods.
  • Analysis of virtual and real drop images using Dropen software.
  • Implementation of robust, automatic identification of contact points and angle evaluation.

Main Results:

  • Dropen software provides automated and robust contact angle evaluation.
  • The study validates Dropen's performance on both virtual and real experimental data.
  • The software minimizes user input, streamlining the measurement process.

Conclusions:

  • Dropen offers an accessible and efficient solution for contact angle measurement.
  • The open-source nature of Dropen encourages further development and adoption.
  • Automated analysis via Dropen enhances the reliability and ease of surface property investigation.