نتایج جستجو برای: polydimethyl siloxane

تعداد نتایج: 1203  

Journal: :Physical chemistry chemical physics : PCCP 2010
Heiko Niedermeyer Mohd Azri Ab Rani Paul D Lickiss Jason P Hallett Tom Welton Andrew J P White Patricia A Hunt

In this paper we use ab initio theoretical methods in combination with experimental studies to investigate ion-pairs of the ionic liquid (IL) 1-methyl-3-pentamethyldisiloxymethylimidazolium chloride [(SiOSi)C(1)C(1)im]Cl, in order to deepen our understanding of the effects of functionalisation on an IL. In addition, we focus on the effect of the siloxy group on the viscosity. We establish that ...

2007
Philip Choi Peng-Fei Fu Jay Guo

Nanoimprint lithography (NIL) is a fabrication technology that offers high-throughput, ultrahigh resolution patterning at great cost savings compared to most competing next-generation radiative lithography methods. As a result of its rapid development in the past decade and its potential for sub-100 nm lithography, NIL has been listed by MIT’s Technology Review as one of ten emerging technologi...

Journal: :Journal of the American Chemical Society 2004
Yi-Yeol Lyu Seung Hwan Yi Jeong Kuk Shon Seok Chang Lyong Sun Pu Sang-Yun Lee Jae Eui Yie Kookheon Char Galen D Stucky Ji Man Kim

Noble Gemini surfactants containing a siloxane moiety have been designed and successfully synthesized in the present study and are utilized as structure-directing agents for mesoporous metal oxides such as zirconia, titania, and vanadia. The siloxane moiety is believed to play an important nano-propping role during the surfactant removal by direct calcination, yielding thermally stable mesoporo...

Journal: :Journal of the American Chemical Society 2011
Wei-Hong Chen Wei-Tsung Chuang U-Ser Jeng Hwo-Shuenn Sheu Hong-Cheu Lin

In this study, we synthesized three analogous bent-core molecules, a hydrogen-bonded complex and a covalent-bonded compound with branched siloxane units (H-SiO and C-SiO, respectively) and a hydrogen-bonded complex with an alkyl unit (H-Alk), and investigated the effects of the hydrogen bonding and branched siloxane terminal units on their mesomorphic properties. The covalent-bonded compound C-...

Journal: :The Journal of prosthetic dentistry 2017
Lambert J Stumpel

The information contained in an interim implant-supported fixed acrylic resin complete denture is a starting point for fabricating the definitive restoration. Duplicating this information in an expedient, precise, and sanitary fashion is desirable so that the interim restoration can be returned to the waiting patient. A technique is described to fabricate an accurate definitive polyvinyl siloxa...

Journal: :Chemical communications 2010
Yoshihiro Yamauchi Makoto Fujita

An organic-pillared coordination cage templated the quantitative formation of siloxane-bridged cyclophanes within its cavity via hydrolysis and condensation of 1,6- and 1,8-bis(trimethoxysilyl)pyrene.

Journal: :Journal of visualized experiments : JoVE 2007
Joseph Harris Hyuna Lee Behrad Vahidi Christina Tu David Cribbs Noo Li Jeon Carl Cotman

In this video, we demonstrate the technique of soft lithography with polydimethyl siloxane (PDMS) which we use to fabricate a microfluidic device for culturing neurons. Previously, a silicon wafer was patterned with the design for the neuron microfluidic device using SU-8 and photolithography to create a master mold, or what we simply refer to as a "master". Next, we pour the silicon polymer PD...

2010
Tao Liu Yoshio Inoue Kyoko Shibata Rencheng Zheng

In clinical applications the quantitative characterization of human kinematics and kinetics can be helpful for clinical doctors in monitoring patients’ recovery status; additionally, the quantitative results may help to strengthen confidence during their rehabilitation. The combination of 3D motion data obtained using an optical motion analysis system and ground reaction forces measured using a...

2015
Fanyong Meng Hao Wu Yinping Zhang

This study examines characteristics of atmospheric methylsiloxane pollution in indoor settings where interior renovation/redecoration is being undertaken, in addition to ordinary family homes and inside family cars. Concentrations of atmospheric methylsiloxane in these locations were approximately one order of magnitude higher than that in outdoor areas. The average indoor concentration of meth...

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