7 papers
Revealing of the new freedom of size: atomic energy levels, screening and charge transporting
Chang Q Sun
Miniaturization of a solid forms a new freedom that is fascinating, which allows us not only to tune the physical properties of a solid but also enables us to gain information abou…
Size-induced acoustic hardening and optic softening of Ramn phonons
Chang Q Sun, L. K. Pan, C. M. Li +1
It has been puzzling that the Raman optical modes shift to lower frequency (or termed as optical mode softening) associated with creation of Raman acoustic modes that shift to high…
Nature evolution of the shortened bond in atomic clusters and at junction interfaces
Chang Q. Sun, C. M. Li, Y. Shi +3
Thermally stimulated process such as evaporation, phase transition, or solid-liquid transition of a solid consumes each a certain portion of the solid cohesive energy that is the s…
Size and confinement effect on nanostructures
Chang Q Sun
This report presents a systematic understanding of the nature behind the unusual behavior of a nanosolid, and a surface as well, in mechanics, thermodynamics, acoustics, optoelectr…
Mechanical strength of atomic chains, surface skins, and nanograins
Chang Q Sun
This report deals with the correlation between the mechanical strength and thermal stability of systems extending from monatomic chains to surface skins and solids over the whole r…
On the unusual behavior of nitride compounds
W. T. Zheng, Chang Q. Sun
This report presents consistent insight into the mechanism behind the unusual behavior of nitride compounds from the perspective of tetrahedron bond formation and its consequence o…