Review Of Adhesives Research Articles

Cell Junction Mechanics beyond the Bounds of Adhesion and Tension.

Cell-cell junctions, in particular adherens junctions, are major determinants of tissue mechanics during morphogenesis and homeostasis. In attempts to link junctional mechanics to tissue mechanics, many have utilized explicitly or implicitly equilibrium approaches based on adhesion energy, surface energy, and contractility to determine the mechanical equilibrium at junctions. However, it is increasingly clear that they have significant limitations, such as that it remains challenging to link the dynamics of the molecular components to the resulting physical properties of the junction, to its remodeling ability, and to its adhesion strength. In this perspective, we discuss recent attempts to consider the aspect of energy dissipation at junctions to draw contact points with soft matter physics where energy loss plays a critical role in adhesion theories. We set the grounds for a theoretical framework of the junction mechanics that bridges the dynamics at the molecular scale to the mechanics at the tissue scale.

A review of adhesion and friction models for gecko feet

The attachment pads of geckos exhibit the most versatile and effective adhesive known in nature. Their fibrillar structure is the primary source of high adhesion and their hierarchical structure produces the adhesion enhancement by giving the gecko the adaptability to create a large real area of contact with surfaces. Although geckos are capable of producing large adhesive forces, they retain the ability to remove their feet from an attachment surface at will. Detachment is achieved by a peeling motion of the gecko’s feet from a surface. During the last few years, many researches have been conducted to develop the theoretical models that explain the gecko to adhere and detach from surfaces at will, including micro/macroscopic gecko adhesion, friction and peeling models for gecko hierarchical fibrillar structure contacting to rough surface. This review describes the progress in the modeling filed for gecko adhesion, friction and peeling, and discussed the future issues for gecko modeling.

A Review of Adhesion in an Ohmic Microswitch

Due to fundamental scaling laws, the effect of surface forces becomes relatively large for microscale structures, such as MEMS. The operation of an ohmic MEMS microswitch relies on repeated make-and-break contacts, typically between each of two metal tips and a metal drain. Large contact forces are desirable for low contact resistance, but the resulting plastic deformation at this small scale, as well as the breaking through of contaminant films, further increases the adhesion force which can then exceed the restoring force of the actuator. This stuck-closed failure, also known as stiction, is a major hindrance to switch reliability and to the ultimate commercialization of these devices. In this article we review the experimental and modeling efforts which have been directed to achieving an improved understanding of adhesion in an ohmic MEMS microswitch.

A review of adhesives and consolidants used on glass antiquities

(1984). A review of adhesives and consolidants used on glass antiquities. Studies in Conservation: Vol. 29, Preprints of the Contributions to the Paris Congress, 2-8 September 1984. Adhesives and Consolidants, pp. 191-194.