نتایج جستجو برای: thermally induced phase separation tips

تعداد نتایج: 1653195  

Journal: :Ultramicroscopy 2015
Amir Hossein Tavabi Vadim Migunov Christian Dwyer Rafal E Dunin-Borkowski Giulio Pozzi

Novel caustic phenomena, which contain fold, butterfly and elliptic umbilic catastrophes, are observed in defocused images of two approximately collinear oppositely biased metallic tips in a transmission electron microscope. The observed patterns depend sensitively on defocus, on the applied voltage between the tips and on their separation and lateral offset. Their main features are interpreted...

Journal: :RSC advances 2015
Xifeng Liu A Lee Miller Brian E Waletzki Michael J Yaszemski Lichun Lu

Scaffolds with intrinsically interconnected porous structures are highly desirable in tissue engineering and regenerative medicine. In this study, three-dimensional polymer scaffolds with highly interconnected porous structures were fabricated by thermally induced phase separation of novel synthesized biodegradable poly(propylene fumarate)-co-poly(l-lactic acid) in a dioxane/water binary system...

Journal: :Macromolecular bioscience 2012
Chenghui Sun Xiaobing Jin Jeremy M Holzwarth Xiaohua Liu Jiang Hu Melanie J Gupte Yaoming Zhao Peter X Ma

A tissue-engineering scaffold resembling the structure of the natural extracellular matrix can often facilitate tissue regeneration. Nerve and tendon are oriented micro-scale tissue bundles. In this study, a method combining injection molding and thermally induced phase separation techniques is developed to create single- and multiple-channeled nanofibrous poly(L-lactic acid) scaffolds. The ove...

Journal: :Applied optics 2001
J D Mansell J Hennawi E K Gustafson M M Fejer R L Byer D Clubley S Yoshida D H Reitze

We examine wave-front distortion caused by high-power lasers on transmissive optics using a Shack-Hartmann wave-front sensor. The coupling coefficient for a thermally aberrated Gaussian beam to the TEM(00) mode of a cavity was determined as a function of magnitude of the thermally induced aberration. One wave of thermally induced phase aberration between the Gaussian intensity peak and the 1/e(...

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