phase transition – TechConnect Briefs

Preparation of ion group functionalized diblock copolymers and examination of their thermogelling properties

Lee B.K., Kwon D.Y., Kwon J.S., Park J.H., Kwon D.Y., Kwon J.S., Kim J.H., Kim M.S., Oh S.H., Kim J.H., Kim M.S., Ajou University, KR

To investigate thermogelling behavior, in this study, methoxy polyethylene glycol-b-[poly(ε-caprolactone)-ran-poly(6-chloride-ε-caprolactone) (PCL-ran-PfCL)] (PCL-Cl) diblock copolymers were designed such that the PfCL content in the PCL segment was varied. The PCL-Cl diblock copolymers were derivatized by introducing [...]

Preparation of ion group functionalized diblock copolymers and examination of their thermogelling properties

Lee B.K., Kwon D.Y., Kwon J.S., Park J.H., Kwon D.Y., Kwon J.S., Kim J.H., Kim M.S., Oh S.H., Kim J.H., Kim M.S., Ajou University, KR

To investigate thermogelling behavior, in this study, methoxy polyethylene glycol-b-[poly(ε-caprolactone)-ran-poly(6-chloride-ε-caprolactone) (PCL-ran-PfCL)] (PCL-Cl) diblock copolymers were designed such that the PfCL content in the PCL segment was varied. The PCL-Cl diblock copolymers were derivatized by introducing [...]

XRD and SEM studies on annealed nanocrystalline titanium dioxide powder

Babkair S.S., Ansari A.A., Al-Qurashi N.N., King Abdulaziz University, SA

Anatase phase of nanocrystalline (nC) titanium dioxide in photo-catalysis, photo-splitting of water to produce hydrogen and as electrode material in Dye Sensitized Solar Cells (DSSCs)is mostly used due to its higher band gap. However, recent [...]

XRD and SEM studies on annealed nanocrystalline titanium dioxide powder

Babkair S.S., Ansari A.A., Al-Qurashi N.N., King Abdulaziz University, SA

Anatase phase of nanocrystalline (nC) titanium dioxide in photo-catalysis, photo-splitting of water to produce hydrogen and as electrode material in Dye Sensitized Solar Cells (DSSCs)is mostly used due to its higher band gap. However, recent [...]

Precipitation of In(OH)3 and InOOH Nanocrystals for the use in nanoelectronics: Phase Transition Behavior and Oriented Aggregation

Klaumünzer M., Mackovic M., Ferstl P., Voigt M., Spiecker E., Meyer B., Peukert W., University Erlangen-Nürnberg, DE

With respect to diverse applications in the wide field of nanoelectronics we characterize a specific phase transition behavior and oriented aggregation (OA) during wet chemical synthesis of In(OH)3 nanocrystals as a wide band gap material [...]

Odd-Even Effect in Self Assembly and Phase Transition of Alkanethiols Monolayers (SAMs) on Au (111) Surfaces

Ramin L., Jabbarzadeh A., The University of Sydney, AU

Molecular dynamic simulations were conducted to predict the structural properties of n-alkanethiols CH3(CH2)n-1SH (n=4-22) self assembled monolayers (SAMs) on Au (111) surfaces. We studied the effects of chain length on the structural properties, including orientation [...]

How to SPION Glass Transitions

Concha M., DeLong S., Radu L., Kumar C., Bidwell-Hanson P., University of New Orleans, US

The magnetic properties of superparamagnetic iron oxide nanoparticles (SPIONs) have made them useful tools in a variety of applications ranging from drug delivery to magnetorheologic valving in microfluidic systems. The structure of SPIONs is typically [...]

Structural and rheological investigation of Fd3m inverse micellar cubic phases

Pouzot M., Mezzenga R., Leser M., Sagalowicz L., Nestlé Research Center, CH

Liquid crystalline phases (bicontinuous cubic, reversed hexagonal, lamellar) can be made easily from food emulsifiers such as monoglycerides. Recently we explored in detail the formation of an inverse discrete micellar Fd3m cubic phase, which usually [...]

A Micromanipulation Method based on the Capillary Force by Phase Transition

Katsuda O., Saito S., Takahashi K., Tokyo Institute of Technology, JP

The size of an object has decreased in the electrical and mechanical engineering field for fabricating highly functional microelectro-mechanical systems and photonic crystals. In micromanipulation, even if we can pickup micro-objects, it is very difficult [...]

Phase transition induced hydrodynamic instability

Loh K-K, Saxena A., Lookman T., Parikh A., Los Alamos National Laboratory, US

Instabilities leading to oscillations in some particular properties of a system are intimately related to pattern formation. Nontrivial patterns form spontaneously as a result of the occurrence and propagation of the fronts of instability. These [...]