Colloidal nanocrystals have long been used to study the dependence of phase stability and transitions on size. Both structural phase stability and phase transitions change dramatically in the nanometre size regime where the surface plays a significant role in determining the overall energetics of the system. We investigate the solid–solid phase transformation of crystallization in amorphous GeT...

passive solar systems such as solar chimneys need solar radiation in order to work. therefore, they cannot present stable natural ventilation when solar energy vanishes: to have a more robust and stable condition, solar energy should be stored during the day and released back during the night. phase change materials can save additional thermal energy during the day and release it during the nig...

change memory devices Kyle L. Grosse, Feng Xiong, Sungduk Hong, William P. King, and Eric Pop Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Illinois 61801, USA Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign, Illinois 61801, USA Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, ...

We report a new method for electrodeposition of device-quality metal chalcogenide semiconductor thin films and nanostructures from a single, highly tuneable, non-aqueous electrolyte. This method opens up the prospect of electrochemical preparation of a wide range of functional semiconducting metal chalcogenide alloys that have applications in various nano-technology areas, ranging from the elec...

Juvenile-to-adult phase transition is an important shift for the acquisition of adult vegetative characteristics and subsequent reproductive competence. We identified a recessive precocious (pre) mutant exhibiting a long leaf phenotype in rice. The long leaf phenotype is conspicuous in the second to the fourth leaves, which are juvenile and juvenile-to-adult transition leaves. We found that mor...

Organizational culture has a significant influence on the success of organizations. Culture determines the kinds of responses that the organization makes to required changes and will make to new problems. It can help predict how well the organization will deal with change. One of these changes is a knowledge management project. Knowledge is viewed as a driver in the definition and development o...

in this paper, the temperature distribution around a moving heat source had been investigated including the phase change and non phase change . in non-phase change state, the governing equation was converted to finite difference equation by finite volume method and the equation was solved by alternating direction implicit method. this method was unconditionally stable . in phase change state, t...

*Correspondence: Martin Salinga, Institute of Physics (IA): Physics of New Materials, RWTH Aachen University, Sommerfeldstr. 14, Aachen 52074, Germany e-mail: martin.salinga@ physik.rwth-aachen.de The time evolution of the resistance of amorphous thin films of the phase change materials Ge2Sb2Te5, GeTe and AgIn-Sb2Te is measured during annealing at T = 80◦C. The annealing process is interrupted...

The macroscopic model of solid-solid phase change presented makes use of internal variables to represent the phase fractions and the local strains. As such, it can be cast in the framework of standard materials with internal constraints. These constraints are accounted for by Lagrange's multipliers. Reversible or irreversible phase changes are considered in a general way. Material stability is ...