Dual Spectrum Neutron Radiography: Identification of Phase Transitions between Frozen and Liquid Water

Phase transitions induced by nanoconfinement in liquid water.

We present results from molecular dynamics simulations of water confined by two parallel atomically detailed hydrophobic walls. Simulations are performed at T = 300 K and wall-wall separation d = 0.6-1.6 nm. At 0.7 < or = d < or = 0.9 nm, a first order transition occurs between a bilayer liquid (BL) and a trilayer heterogeneous fluid (THF) as water density increases. The THF is characterized by...

Interplay between two phase transitions: crystallization and liquid-liquid phase separation in a polyolefin blend.

The interplay between liquid-liquid phase separation (LLPS) and crystallization at several compositions in statistical copolymer blends of poly(ethyleneco-hexene) and poly(ethylene-cobutene) has been examined by optical microscopy (OM), atomic force microscopy (AFM), and differential scanning calorimetry (DSC). The phase contrast optical microscopy shows interconnected bicontinuous structures f...

Distribution of Water in Filling Fibres Visualised by Neutron Radiography

Christian–Doppler–Laboratory for Chemistry of Cellulosic Fibres & Textiles, Leopold–Franzens University Innsbruck; Present Address: Lenzing AG, Business Development & Innovation Textiles, Fiber Science Group, A–4860 Lenzing; Tel. +43 7672 701 2757; Fax. +43 7672 918 2757; E–Mail: [email protected] Atomic Institute of Austrian Universities, Vienna University of Technology Lenzing AG, Business ...

Phase transitions in liquid crystals

Superfluid phase transitions in dense neutron matter.

The phase transitions in a realistic system with triplet pairing, dense neutron matter, have been investigated. The spectrum of phases of the 3P2-3F2 model, which adequately describes pairing in this system, is analytically constructed with the aid of a separation method for solving BCS gap equations in states of arbitrary angular momentum. In addition to solutions involving a single value of t...