Stress variations near surfaces in diamond-like amorphous carbon

The ultrasmoothness of diamond-like carbon surfaces.

The ultrasmoothness of diamond-like carbon coatings is explained by an atomistic/continuum multiscale model. At the atomic scale, carbon ion impacts induce downhill currents in the top layer of a growing film. At the continuum scale, these currents cause a rapid smoothing of initially rough substrates by erosion of hills into neighboring hollows. The predicted surface evolution is in excellent ...

Atomistic Factors Governing Adhesion between Diamond, Amorphous Carbon, and Model Diamond Nanocomposite Surfaces

Facile abstraction of hydrogen atoms from graphane, diamond, and amorphous carbon surfaces: A first-principles study

ion of surface hydrogen by atomic H from graphane, diamond 001 , diamond 111 , and hydrogenated amorphous carbon a-C:H surfaces was studied using density-functional theory calculations in the generalized gradient approximation. Our calculations show that for each surface, the abstraction reaction is highly exothermic with a negligible activation energy barrier. The degree of exothermicity depen...

Fluctuation microscopy studies of medium-range ordering in amorphous diamond-like carbon films

In this letter, we report fluctuation microscopy studies of medium-range ordering in amorphous diamond-like carbon films and the effect of annealing on this ordering. Annealed and unannealed diamond-like carbon films have almost identical short-range order. Our fluctuation microscopy results, however, indicate the presence of medium range order or clustering in the films on a lateral length sca...

Encapsulating Piezoresistive Thin Film Sensors Based on Amorphous Diamond-Like Carbon in Aluminium Castings

The paper describes a new approach for the in-process integration of sensors into lightweight metal components made of aluminium and fabricated by casting. It examines the suitability of DiaForce thin film sensors based on piezoresistive hydrocarbon layers (DLC) for integration in molten aluminium. In contrast to previous research, a technology is introduced which will allow real-time measureme...