Synthesis of Single-Crystalline Mesoporous ZSM-5 with Three-Dimensional Pores via the Self-Assembly of a Designed Triply Branched Cationic Surfactant

2014 ◽  
Vol 26 (24) ◽  
pp. 7183-7188 ◽  
Author(s):  
Bhupendra K. Singh ◽  
Dongdong Xu ◽  
Lu Han ◽  
Jian Ding ◽  
Yimeng Wang ◽  
...  
Keyword(s):  
Cationic Surfactant ◽  
Self Assembly ◽  
Three Dimensional ◽  
The Self ◽  
Single Crystalline

Nanoscale Self-Assembly Using Ion and Electron Beam Techniques: A Rapid Review

MRS Advances ◽  
2020 ◽  
Vol 5 (64) ◽  
pp. 3507-3520
Author(s):  
Chunhui Dai ◽  
Kriti Agarwal ◽  
Jeong-Hyun Cho
Keyword(s):  
Electron Beam ◽  
Self Assembly ◽  
Ion Beam ◽  
Three Dimensional ◽  
The Self ◽  
Stress Generation ◽  
Rapid Review ◽  
High Yield ◽  
3D Nanostructures ◽  
Self Assembled

AbstractNanoscale self-assembly, as a technique to transform two-dimensional (2D) planar patterns into three-dimensional (3D) nanoscale architectures, has achieved tremendous success in the past decade. However, an assembly process at nanoscale is easily affected by small unavoidable variations in sample conditions and reaction environment, resulting in a low yield. Recently, in-situ monitored self-assembly based on ion and electron irradiation has stood out as a promising candidate to overcome this limitation. The usage of ion and electron beam allows stress generation and real-time observation simultaneously, which significantly enhances the controllability of self-assembly. This enables the realization of various complex 3D nanostructures with a high yield. The additional dimension of the self-assembled 3D nanostructures opens the possibility to explore novel properties that cannot be demonstrated in 2D planar patterns. Here, we present a rapid review on the recent achievements and challenges in nanoscale self-assembly using electron and ion beam techniques, followed by a discussion of the novel optical properties achieved in the self-assembled 3D nanostructures.

Self-assembled three-dimensional hierarchical graphene hybrid hydrogels with ultrathin β-MnO2 nanobelts for high performance supercapacitors

2015 ◽  
Vol 3 (4) ◽  
pp. 1540-1548 ◽  
Author(s):  
Sheng Zhu ◽  
Hui Zhang ◽  
Ping Chen ◽  
Lin-Hui Nie ◽  
Chuan-Hao Li ◽  
...  
Keyword(s):  
Self Assembly ◽  
High Performance ◽  
Three Dimensional ◽  
The Self ◽  
Mass Loading ◽  
Hybrid Hydrogel ◽  
Precise Control ◽  
Ultrafine Structure ◽  
Hybrid Hydrogels ◽  
Self Assembled

A facile protocol for the self-assembly of the rGO/β-MnO2 hybrid hydrogel with ultrafine structure and precise control of mass-loading for high performance supercapacitors is reported.

Facile synthesis of ultrathin single-crystalline palladium nanowires with enhanced electrocatalytic activities

2016 ◽  
Vol 52 (88) ◽  
pp. 12996-12999 ◽  
Author(s):  
Dongdong Xu ◽  
Xiaoli Liu ◽  
Min Han ◽  
Jianchun Bao
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Facile Synthesis ◽  
Single Crystalline ◽  
Palladium Nanowires

Ultrathin single-crystalline palladium nanowires could be rapidly synthesized by the self-assembly of a specific surfactant dioctadecyldimethylammonium chloride.

scholarly journals Self-assembly and hydrogel formation ability of Fmoc-dipeptides comprising α-methyl-L-phenylalanine

2020 ◽  
Vol 52 (8) ◽  
pp. 923-930 ◽  
Author(s):  
Hanae Arakawa ◽  
Kumi Takeda ◽  
Sayuri L. Higashi ◽  
Aya Shibata ◽  
Yoshiaki Kitamura ◽  
...  
Keyword(s):  
Self Assembly ◽  
Network Formation ◽  
Aqueous Media ◽  
Three Dimensional ◽  
The Self ◽  
Methyl Groups ◽  
Marked Influence ◽  
Hydrogel Network ◽  
Hydrogel Formation ◽  
Peptide Derivatives

AbstractVarious biofunctional hydrogel materials can be fabricated in aqueous media through the self-assembly of peptide derivatives, forming supramolecular nanostructures and their three-dimensional networks. In this study, we describe the self-assembly of new Fmoc-dipeptides comprising α-methyl-L-phenylalanine. We found that the position and number of methyl groups introduced onto the α carbons of the Fmoc-dipeptides by α-methyl-L-phenylalanine have a marked influence on the morphology of the supramolecular nanostructure as well as the hydrogel (network) formation ability.

Design and chance in the self-assembly of macromolecules

2007 ◽  
Vol 35 (3) ◽  
pp. 502-507 ◽  
Author(s):  
J.A.R. Worrall ◽  
M. Górna ◽  
X.Y. Pei ◽  
D.R. Spring ◽  
R.L. Nicholson ◽  
...  
Keyword(s):  
Amino Acids ◽  
Self Assembly ◽  
Synthetic Detergent ◽  
Stable Equilibrium ◽  
Three Dimensional ◽  
The Self ◽  
Biological Molecules ◽  
Assembly Process ◽  
Naturally Occurring ◽  
Polymeric Assemblies

The principles of self-assembly are described for naturally occurring macromolecules and for complex assemblies formed from simple synthetic constituents. Many biological molecules owe their function and specificity to their three-dimensional folds, and, in many cases, these folds are specified entirely by the sequence of the constituent amino acids or nucleic acids, and without the requirement for additional machinery to guide the formation of the structure. Thus sequence may often be sufficient to guide the assembly process, starting from denatured components having little or no folds, to the completion state with the stable, equilibrium fold that encompasses functional activity. Self-assembly of homopolymeric structures does not necessarily preserve symmetry, and some polymeric assemblies are organized so that their chemically identical subunits pack stably in geometrically non-equivalent ways. Self-assembly can also involve scaffolds that lack structure, as seen in the multi-enzyme assembly, the degradosome. The stable self-assembly of lipids into dynamic membraneous sheets is also described, and an example is shown in which a synthetic detergent can assemble into membrane layers.

Controllable synthesis of three-dimensional branched gold nanocrystals assisted by cationic surfactant poly(diallyldimethylammonium) chloride in acidic aqueous solution

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36757-36764 ◽  
Author(s):  
Haibin Zhang ◽  
Yonggang Lu ◽  
Hong Liu ◽  
Jingzhong Fang
Keyword(s):  
Aqueous Solution ◽  
Cationic Surfactant ◽  
Hierarchical Structure ◽  
Three Dimensional ◽  
Effective Strategy ◽  
Controllable Synthesis ◽  
Acidic Aqueous Solution ◽  
Single Crystalline ◽  
Gold Nanocrystals ◽  
Diallyldimethylammonium Chloride

An effective strategy was used for the controllable synthesis of single crystalline branched gold nanocrystals with a three-dimensional hierarchical structure in aqueous solution.

A Model of Force Generation in a Three-Dimensional Toroidal Cluster of Cells

2012 ◽  
Vol 79 (5) ◽  
Author(s):  
Asha Nurse ◽  
L. B. Freund ◽  
Jacquelyn Youssef
Keyword(s):  
Potential Energy ◽  
Gravitational Potential ◽  
Self Assembly ◽  
Three Dimensional ◽  
Dissipative System ◽  
The Self ◽  
Three Dimensions ◽  
Force Generation ◽  
Gravitational Potential Energy ◽  
Kinetics Of

Observation of the self-assembly of clusters of cells in three dimensions has raised questions about the forces that drive changes in the shape of the cell clusters. Cells that self-assemble into a toroidal cluster about the base of a conical pillar have been observed in the laboratory to spontaneously climb the conical pillar. Assuming that cell cluster reorganization is due solely to surface diffusion, a mathematical model based on the thermodynamics of an isothermal dissipative system is presented. The model shows that the cluster can reduce its surface area by climbing the conical pillar, however, this is at the expense of increasing its gravitational potential energy. As a result, the kinetics of the climb are affected by parameters that influence this energy competition, such as the slope of the conical pillar and a parameter of the model κ that represents the influence of the surface energy of the cluster relative to its gravitational potential energy.

Hematite Nano Cubes and the Prototypes of Their Self Assembly Investigated Using Tem

1996 ◽  
Vol 432 ◽  
Author(s):  
San Yu ◽  
Shihai Kan ◽  
Guangtian Zou ◽  
Xiaogang Peng ◽  
Dongmei Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Short Range ◽  
The Self ◽  
Magnetic Feature ◽  
Preferential Growth ◽  
Single Crystalline ◽  
Transmission Electron ◽  
Assembly Feature ◽  
Equilibrium Shapes

AbstractMonodisperse hematite cubes about 30nm in size have been prepared by aging a refluxing acidified aqueous solution of FeCl3 in an open vessel. The as grown nano cubes were determined to be single crystalline hematite in perfect cubic shapes using transmission electron microscope and electron diffraction. The nano cube is one of the equilibrium shapes of hematite, which is resumed to be formed by preferential growth in certain crystallographic directions through the species diffusion in the aqueous solutions.Some self-assembly prototypes have been observed, such as the short range ordered buildup consisting of several brick-like hematite nano cubes and the nano box consisted of square plates of hematite nanocrystals. The drive force for the formation of the above assemblies is assumed to be the unique magnetic feature of the single crystalline hematite nano cubes.The perfect shape and the self-assembly feature give a possibility to fabricate bulk ceramics orderly assembled using hematite nano cubes.

Two new isostructural mercury(II) complexes involving the N-heterocyclic 1-[(benzotriazol-1-yl)methyl]-1H-1,3-imidazole ligand: syntheses, structures and properties

2017 ◽  
Vol 73 (4) ◽  
pp. 314-318 ◽  
Author(s):  
Xu Wei ◽  
Jian-Hua Li ◽  
Qiu-Ying Huang ◽  
Xiang-Ru Meng
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Ir Spectra ◽  
Self Assembly ◽  
Three Dimensional ◽  
The Self ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heterocyclic Ligand ◽  
Structures And Properties

The unsymmetrical N-heterocyclic ligand 1-[(benzotriazol-1-yl)methyl]-1H-1,3-imidazole (bmi) has three potential N-atom donors and can act in monodentate or bridging coordination modes in the construction of complexes. In addition, the bmi ligand can adopt different coordination conformations, resulting in complexes with different structures due to the presence of the flexible methylene spacer. Two new complexes, namely bis{1-[(benzotriazol-1-yl)methyl]-1H-1,3-imidazole-κN3}dibromidomercury(II), [HgBr2(C10H9N5)2], and bis{1-[(benzotriazol-1-yl)methyl]-1H-1,3-imidazole-κN3}diiodidomercury(II), [HgI2(C10H9N5)2], have been synthesized through the self-assembly of bmi with HgBr2or HgI2. Single-crystal X-ray diffraction shows that both complexes are mononuclear structures, in which the bmi ligands coordinate to the HgIIions in monodentate modes. In the solid state, both complexes display three-dimensional networks formed by a combination of hydrogen bonds and π–π interactions. The IR spectra and PXRD patterns of both complexes have also been recorded.

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