Roughness and pore structure control of ordered mesoporous silica films for the enhancement of electrical properties

2007 ◽  
Vol 101 (2) ◽  
pp. 024109 ◽  
Author(s):  
Sang-Bae Jung ◽  
Tae-Jung Ha ◽  
Hyung-Ho Park
Keyword(s):  
Electrical Properties ◽  
Mesoporous Silica ◽  
Pore Structure ◽  
Ordered Mesoporous Silica ◽  
Silica Films ◽  
Structure Control ◽  
Ordered Mesoporous ◽  
Pore Structure Control

scholarly journals Pore Structure Control of Ordered Mesoporous Silica Film Using Mixed Surfactants

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Tae-Jung Ha ◽  
Hyeon-Gyoon Im ◽  
Seok-Jin Yoon ◽  
Ho Won Jang ◽  
Hyung-Ho Park
Keyword(s):  
Mesoporous Silica ◽  
Pore Structure ◽  
New Technology ◽  
Silica Film ◽  
Ordered Mesoporous Silica ◽  
X Ray Diffraction ◽  
Silica Films ◽  
Structure Control ◽  
Ordered Mesoporous ◽  
Mesoporous Silica Film

Materials with nanosized and well-arranged pores have been researched actively in order to be applied to new technology fields. Especially, mesoporous material containing various pore structures is expected to have different pore structure. To form a mixed pore structure, ordered mesoporous silica films were prepared with a mixture of surfactant; Brij-76 and P-123 block copolymer. In mixed surfactant system, mixed pore structure was observed in the region of P-123/(Brij-76 + P-123) with about 50.0 wt.% while a single pore structure was observed in regions which have large difference in ratio between Brij-76 and P-123 through the X-ray diffraction analysis. Regardless of surfactant ratio, porosity was retained almost the same. It is expected that ordered mesoporous silica film with mixed pore structure can be one of the new materials which has distinctive properties.

scholarly journals Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
John B. Lowe ◽  
Richard T. Baker
Keyword(s):  
Mesoporous Silica ◽  
Pore Structure ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Ordered Mesoporous Silica ◽  
Large Cage ◽  
Pore Structures ◽  
Ordered Mesoporous ◽  
Pore Size Distributions ◽  
Wide Range

Ordered mesoporous silica materials are of interest for a wide range of applications. In many of these, elevated temperatures are used either in the preparation of the material or during its use. Therefore, an understanding of the effect of high temperature treatments on these materials is desirable. In this work, a detailed structural study is performed on silicas with three representative pore structures: a 2-D hexagonal pore arrangement (SBA-15), a continuous 3D cubic bimodal pore structure (KIT-6), and a 3D large cage pore structure (FDU-12). Each silica is studied as prepared and after treatment at a series of temperatures between 300 and 900°C. Pore structures are imaged using Transmission Electron Microscopy. This technique is used in conjunction with Small-Angle X-ray Diffraction, gas physisorption, and29Si solid state Nuclear Magnetic Resonance. Using these techniques, the pore size distributions, the unit cell dimensions of the mesoporous structures, and the relative occupancy of the distinct chemical environments of Si within them are cross correlated for the three silicas and their evolution with treatment temperature is elucidated. The physical and chemical properties before, during, and after collapse of these structures at high temperatures are described as are the differences in behavior between the three silica structures.

Humidity-driven deformation of ordered mesoporous silica films

2014 ◽  
Vol 3 (3) ◽  
pp. 183-190 ◽  
Author(s):  
Parvin Sharifi ◽  
Benedetta Marmiroli ◽  
Barbara Sartori ◽  
Fernando Cacho-Nerin ◽  
Jozef Keckes ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Ordered Mesoporous Silica ◽  
Silica Films ◽  
Ordered Mesoporous

Thermal conductivity of BCC-ordered mesoporous silica films

2009 ◽  
Vol 42 (12) ◽  
pp. 125404 ◽  
Author(s):  
Sangwoo Shin ◽  
Tae-Jung Ha ◽  
Hyung-Ho Park ◽  
Hyung Hee Cho
Keyword(s):  
Thermal Conductivity ◽  
Mesoporous Silica ◽  
Ordered Mesoporous Silica ◽  
Silica Films ◽  
Ordered Mesoporous

Highly Ordered Mesoporous Silica Films with Perpendicular Mesochannels by a Simple Stöber-Solution Growth Approach

2012 ◽  
Vol 124 (9) ◽  
pp. 2215-2219 ◽  
Author(s):  
Zhaogang Teng ◽  
Gengfeng Zheng ◽  
Yuqian Dou ◽  
Wei Li ◽  
Chung-Yuan Mou ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Solution Growth ◽  
Ordered Mesoporous Silica ◽  
Silica Films ◽  
Ordered Mesoporous ◽  
Growth Approach

scholarly journals Ordered mesoporous silica films with pores oriented perpendicular to a titanium nitride substrate

2015 ◽  
Vol 17 (6) ◽  
pp. 4763-4770 ◽  
Author(s):  
Calum Robertson ◽  
Richard Beanland ◽  
Stuart A. Boden ◽  
Andrew L. Hector ◽  
Reza J. Kashtiban ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Titanium Nitride ◽  
Growth Surface ◽  
Ordered Mesoporous Silica ◽  
Mesoporous Films ◽  
Silica Films ◽  
Ordered Mesoporous

Thin mesoporous films are demonstrated with pores oriented perpendicular to a titanium nitride growth surface.

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