The Integument of Water-walking Arthropods: Form and Function John W.M. Bush
... to minimize the total surface area (Plateau, 1873; Rayleigh, 1879). If U is the total cohesive energy per molecule, then a molecule at a flat surface will lose U/2. Surface tension is a direct measure of this energy loss per unit area of surface. If the characteristic molecular dimension is R, its ar ...
... to minimize the total surface area (Plateau, 1873; Rayleigh, 1879). If U is the total cohesive energy per molecule, then a molecule at a flat surface will lose U/2. Surface tension is a direct measure of this energy loss per unit area of surface. If the characteristic molecular dimension is R, its ar ...
Pore-Scale Controls on Reaction-Driven Fracturing - DUO
... We will now take a closer look at the pore-scale mechanisms that lead to the stresses and fracture patterns discussed in the preceding section. The key requirement for reactions to take place is that water has access to the reactive surface. In the examples given below, we will show how fracturing c ...
... We will now take a closer look at the pore-scale mechanisms that lead to the stresses and fracture patterns discussed in the preceding section. The key requirement for reactions to take place is that water has access to the reactive surface. In the examples given below, we will show how fracturing c ...
Structural Transformations of Zinc Oxide Layers on Pt(111)
... The STM images presented above show that the (4 × 4) structure is formed on areas initially uncovered by (6 × 6) islands. This implies the presence of small ZnOx clusters that migrate across the Pt(111) surface. Such species may also account for the tip instability and streaky STM images shown in Fi ...
... The STM images presented above show that the (4 × 4) structure is formed on areas initially uncovered by (6 × 6) islands. This implies the presence of small ZnOx clusters that migrate across the Pt(111) surface. Such species may also account for the tip instability and streaky STM images shown in Fi ...
Modification of the surface electronic and chemical properties of Pt
... mixing picture. The adsorbate orbitals are first broadened by interactions with the broad s-electron band, and then split by strong interactions with the sharper d-band. These authors further demonstrated that modification of the surface electronic structure can result in a predictable modification ...
... mixing picture. The adsorbate orbitals are first broadened by interactions with the broad s-electron band, and then split by strong interactions with the sharper d-band. These authors further demonstrated that modification of the surface electronic structure can result in a predictable modification ...
Investigation of the Hysteretic Phenomena in Surface Reconstruction
... static and the dynamic RHEED-s are very complex phenomena, but these effects can be used as versatile tools for in-situ monitoring of the growth of the epitaxial layer, in spite of the fact that we do not know much about the details of its nature. Our observations showed that the specular beam inten ...
... static and the dynamic RHEED-s are very complex phenomena, but these effects can be used as versatile tools for in-situ monitoring of the growth of the epitaxial layer, in spite of the fact that we do not know much about the details of its nature. Our observations showed that the specular beam inten ...
2.26 MB - KFUPM Resources v3
... Distance between molecules increase slightly as a solid turns to liquid ...
... Distance between molecules increase slightly as a solid turns to liquid ...
Surface tension
Surface tension is the elastic tendency of liquids which makes them acquire the least surface area possible. Surface tension is an important property that markedly influences many ecosystems. Surface tension is responsible, for example, when an object or insect (e.g. water striders) that is denser than water is able to float or run along the water surface.At liquid-air interfaces, surface tension results from the greater attraction of water molecules to each other (due to cohesion) than to the molecules in the air (due to adhesion). The net effect is an inward force at its surface that causes water to behave as if its surface were covered with a stretched elastic membrane. Because of the relatively high attraction of water molecules for each other, water has a high surface tension (72.8 millinewtons per meter at 20 °C) compared to that of most other liquids. Surface tension is an important factor in the phenomenon of capillarity.Surface tension has the dimension of force per unit length, or of energy per unit area. The two are equivalent—but when referring to energy per unit of area, people use the term surface energy—which is a more general term in the sense that it applies also to solids and not just liquids.In materials science, surface tension is used for either surface stress or surface free energy.