نتایج جستجو برای: melting points

تعداد نتایج: 291120  

Journal: :Physical review letters 2000
Shvartsburg Jarrold

The fact that the melting points of nanoparticles are always lower than those of the corresponding bulk material is a paradigm supported by extensive experimental data for a large number of systems and by numerous calculations. Here we demonstrate that tin cluster ions with 10-30 atoms remain solid at approximately 50 K above the melting point of bulk tin. This behavior is possibly related to t...

Journal: :Physical chemistry chemical physics : PCCP 2015
Yong Seok Hwang Valery I Levitas

An advanced continuum model for nanoscale melting and kinetic superheating of an aluminum nanolayer irradiated by a picosecond laser is formulated. Barrierless nucleation of surface premelting and melting occurs, followed by a propagation of two solid-melt interfaces toward each other and their collision. For a slow heating rate of Q = 0.015 K ps(-1) melting occurs at the equilibrium melting te...

Journal: :Carbohydrate research 2004
Minna Hurtta Ilkka Pitkänen Juha Knuutinen

The melting behaviour of d-sucrose, d-glucose and d-fructose was studied. The melting peaks were determined with DSC and the start of decomposition was studied with TG at different rates of heating. In addition, melting points were determined with a melting point apparatus. The samples were identified as d-sucrose, alpha-d-glucopyranose and beta-d-fructopyranose by powder diffraction measuremen...

2006
James J. Weeks

The melting tempera ture of linear polyethylene has been obtained as a function of the t ime and tempera ture of crystallization. Recrystallization was minimized by a special melting procedure. By interpreting the melting points as characteristic of a given lamellar thickness, i t was found t h a t the thickness of crystals of appreciable age increased linearly with t he logari thm of their t i...

2010
E. R. Grilly

Analytical expressions are derived for the melting line and liquid equation of state of normal deuterium near the triple point. Melting pressures were measured between the triple point and 20.4 K. These results combined with existing pressure measurements along the saturated liquid-vapor curve fix an accurate value. Ttp =j118. 723 K, for the triple-point temperature. Data for the isothermal com...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Daisuke Takaiwa Itaru Hatano Kenichiro Koga Hideki Tanaka

A phase diagram of water in single-walled carbon nanotubes at atmospheric pressure is proposed, which summarizes ice structures and their melting points as a function of the tube diameter up to 1.7 nm. The investigation is based on extensive molecular dynamics simulations over numerous thermodynamic states on the temperature-diameter plane. Spontaneous freezing of water in the simulations and t...

Journal: :Journal of the Japan Institute of Metals and Materials 1974

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