The phrase "angle of the surface" is correct and usable in written English.
It can be used in contexts related to geometry, physics, engineering, or any field where the orientation of a surface is relevant.
Example: "To calculate the force acting on the object, we need to determine the angle of the surface it is resting on."
Alternatives: "slope of the surface" or "inclination of the surface".
The contact angle of the surface greatly increased when the PTFE content increased over 50 vol.%.
The water contact angle of the surface of each region of coexisting four-diameter TiO2 nanotube arrays is also about 3 7° (as shown in Table 1).
After the atmospheric pressure plasma treatment of polypropylene (PP) film surface, we measured the contact angle of the surface by using polar solvent (water) and nonpolar solvent (diiodomethane).
The aspect ratio of the rod was varied in order to analyze the effect of surface roughness on the contact angle of the surface.
The mean tilt angle of the surface roughness for both nitride and oxide formation on the Al and Ti targets was measured from the reflected intensity profiles.
When averaging the width/height of the terraces over 100 × 100 μm areas, the misorientation angle of the surface layers is 0.08°, 0.06°, and 0.10° for S5, S10, and S20, respectively.
Measurements of contact angle on the surface of a gel is a difficult issue.
Monte Carlo simulations of polarized fluorescence fluctuation experiment for 1D linear transition dipoles of single molecules in solution were carried out by diffusion of Eulerian angles on the surface of a sphere, following a typical stochastic Wiener process.
The contact angle of the etched surface and the surface roughness were measured using an optical three-dimensional surface meter.
The limiting wetting angles of the surface hardened by MPT are higher than untreated specimens.
As per the request of contact angle measurement, an optical contact angle measuring device (OCA20, Dataphysics) was utilized to determine water contact angles of the surface of each region of coexisting four-diameter TiO2 nanotube arrays.
