scholarly journals Synthesis of a Three-Dimensional Cubic Mesoporous Silica Monolith Employing an Organic Additive through an Evaporation-Induced Self-Assembly Process

Langmuir ◽  
2006 ◽  
Vol 22 (20) ◽  
pp. 8614-8614 ◽  
Author(s):  
Sajo P. Naik ◽  
Wei Fan ◽  
Toshiyuki Yokoi ◽  
Tatsuya Okubo
Keyword(s):  
Mesoporous Silica ◽  
Self Assembly ◽  
Three Dimensional ◽  
Organic Additive ◽  
Assembly Process ◽  
Silica Monolith ◽  
Evaporation Induced Self Assembly ◽  
Cubic Mesoporous

Arginine-assisted synthesis of palladium nanochain networks and their enhanced electrocatalytic activity for borohydride oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 18111-18115 ◽  
Author(s):  
Geng-Tao Fu ◽  
Rui Wu ◽  
Chang Liu ◽  
Jun Lin ◽  
Dong-Mei Sun ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Three Dimensional ◽  
Assembly Process ◽  
Electrocatalytic Performance ◽  
Borohydride Oxidation

Three-dimensional Pd nanochain networks (Pd-NCNs) were prepared by an arginine-assisted self-assembly process, exhibiting excellent electrocatalytic performance towards the borohydride oxidation reaction.

scholarly journals Extra Surfactant-Assisted Self-Assembly of Highly Ordered Monolayers of BaTiO3 Nanocubes at the Air—Water Interface

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 739 ◽  
Author(s):  
Hiroki Itasaka ◽  
Ken-Ichi Mimura ◽  
Kazumi Kato
Keyword(s):  
Self Assembly ◽  
Large Scale ◽  
Three Dimensional ◽  
Water Interface ◽  
Compression Pressure ◽  
Air Water Interface ◽  
Out Of Plane ◽  
Key Factor ◽  
Evaporation Induced Self Assembly ◽  
20 Nm

Assembly of nanocrystals into ordered two- or three-dimensional arrays is an essential technology to achieve their application in novel functional devices. Among a variety of assembly techniques, evaporation-induced self-assembly (EISA) is one of the prospective approaches because of its simplicity. Although EISA has shown its potential to form highly ordered nanocrystal arrays, the formation of uniform nanocrystal arrays over large areas remains a challenging subject. Here, we introduce a new EISA method and demonstrate the formation of large-scale highly ordered monolayers of barium titanate (BaTiO3, BT) nanocubes at the air-water interface. In our method, the addition of an extra surfactant to a water surface assists the EISA of BT nanocubes with a size of 15–20 nm into a highly ordered arrangement. We reveal that the compression pressure exerted by the extra surfactant on BT nanocubes during the solvent evaporation is a key factor in the self-assembly in our method. The BT nanocube monolayers transferred to substrates have sizes up to the millimeter scale and a high out-of-plane crystal orientation, containing almost no microcracks and voids.

Metal-mediated multiporphyrin functional assemblies

2009 ◽  
Vol 13 (04n05) ◽  
pp. 481-493 ◽  
Author(s):  
Laura P. Hernández ◽  
Almudena González-Álvarez ◽  
Ana I. Oliva ◽  
Pablo Ballester
Keyword(s):  
Research Group ◽  
Self Assembly ◽  
Three Dimensional ◽  
Great Majority ◽  
Supramolecular Structures ◽  
Assembly Process ◽  
Thermodynamic Characterization ◽  
Closed Loops

During the last ten years, our research group has been applying metal-mediated self-assembly processes to the construction of multiporphyrin functional assemblies. The construction of well-defined and discrete supramolecular structures resulting from self-assembly requires the use of multiple and separated connections operating in one or more closed loops. Consequently, the great majority of the multiporphyrin assemblies that we have prepared are of cyclic nature. We have placed special emphasis not only on the characterization in solution of the formed assemblies but also on the thermodynamic characterization of the assembly process and in the assessment of cooperativity. Finally, we also present examples in which functionality has been derived from the three-dimensional structures of multicomponent assemblies.

Synthesis of Mesoporous Silica Particles with Fibrous Morphology via Self-Assembly Process in Microemulsion System

2015 ◽  
Vol 1112 ◽  
pp. 172-175 ◽  
Author(s):  
Erna Febriyanti ◽  
Rino R. Mukti ◽  
Veinardi Suendo ◽  
I. Nyoman Marsih ◽  
Sugeng Triwahyono ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Silica ◽  
Surface Area ◽  
Self Assembly ◽  
Silica Particle ◽  
High Surface ◽  
Microemulsion System ◽  
Assembly Process ◽  
Fibrous Materials ◽  
Mesoporous Silica Particle

In this research, several precursors were chosen to solve the drawbacks of using toxic and expensive chemicals in the synthesis of fibrous mesoporous silica particle via self-assembly process in microemulsion system. The synthesis of this emerging material normally is realized by using toxic cetylpyridinium bromide (CPB) as common structure directing agent in conjunction with combined cyclohexane and n-pentanol as expensive solvent and co-solvent, respectively. Less toxic cetyltrimethylammonium bromide (CTAB) can be the replacement for CPB but the use of this surfactant may drastically reduce the surface area of the resulting product. Herein, we report that the use of CTAB with combined toluene and n-butanol as affordable solvents can be used to synthesize fibrous mesoporous silica particle with high surface area. The material was well characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), N2 adsorption/ desorption, X-ray difraction (XRD)and thermal gravimetry (TG). This material might be applied in potential applications such as catalysis, drug delivery and adsorption. Moreover, it can be used as a hard-template for fabricating another novel fibrous materials.

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