scholarly journals Fabrication and excellent electroresponsive properties of ideal PMMA@BaTiO3 composite particles

RSC Advances ◽  
2019 ◽  
Vol 9 (22) ◽  
pp. 12404-12414 ◽  
Author(s):  
Wen Liu ◽  
Zunyuan Xie ◽  
Yaping Lu ◽  
Meixiang Gao ◽  
Weiqiang Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Covalent Bonding ◽  
The Self ◽  
Composite Particles ◽  
Core Shell

A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature.

Hydrothermal Syntheses, Crystal Structures, and Luminescent Properties of Two MnII Coordination Polymers: From Two-Fold Interpenetrated pcu Topological Net to Polycatenated 2D+2D→3D Framework

2015 ◽  
Vol 68 (2) ◽  
pp. 322 ◽  
Author(s):  
Wenlong Liu ◽  
Mengqiang Wu ◽  
Xueying Wang ◽  
Wei Wang ◽  
Dayu Liu ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Coordination Polymers ◽  
Self Assembly ◽  
Room Temperature ◽  
Luminescent Properties ◽  
The Self ◽  
X Ray Diffraction ◽  
X Ray ◽  
3D Framework ◽  
Dimethyl Benzene

Using a hydrothermal synthesis, the self-assembly of MnII ions and 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene with two dicarboxylate ligands, 2-nitrobenzene-1,4-dicarboxylic acid (2-H2ata) and 5-methylbenzene-1,3-dicarboxylic acid (5-CH3-H2ip) constructed two interesting coordination polymers: [Mn(2-ata)(bimb)]n (1) and {[Mn(5-CH3-ip)(bimb)1.5]·2H2O}n (2), where bimb refers to 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene. Their structures were determined by single-crystal X-ray diffraction, elemental analysis, and infrared spectroscopy. Complex 1 exhibits a 2-fold interpenetrated pcu net. Complex 2 shows an unusual polycatenated 2D+2D→3D framework. In addition, the solid-state photoluminescent properties of 1 and 2 were investigated at room temperature.

Water dynamics and self-assembly of single-chain nanoparticles in concentrated solutions

Soft Matter ◽  
2020 ◽  
Vol 16 (42) ◽  
pp. 9738-9745
Author(s):  
Beatriz Robles-Hernández ◽  
Edurne González ◽  
José A. Pomposo ◽  
Juan Colmenero ◽  
Ángel Alegría
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Water Dynamics ◽  
Nano Particles ◽  
Random Copolymers ◽  
Core Shell ◽  
Dielectric Studies ◽  
Single Chain ◽  
Concentrated Solutions ◽  
Overlap Concentration

Dielectric studies on water dynamics in aqueous solutions of amphiphilic random copolymers confirm the self-assembly into globular like core–shell single-chain nano-particles (SCNPs) at concentrations well above the overlap concentration.

Expanding Micelle Nanolithography to the Self-Assembly of Multicomponent Core−Shell Nanoparticles

2010 ◽  
Vol 132 (31) ◽  
pp. 10671-10673 ◽  
Author(s):  
Beri N. Mbenkum ◽  
Alejandro Díaz-Ortiz ◽  
Lin Gu ◽  
Peter A. van Aken ◽  
Gisela Schütz
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

scholarly journals Adjacent functional group effects on the assembly of columnar liquid crystals

2020 ◽  
Vol 98 (7) ◽  
pp. 379-385
Author(s):  
Carson O. Zellman ◽  
Danielle Vu ◽  
Vance E. Williams
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Room Temperature ◽  
Functional Group ◽  
The Self ◽  
Clearing Temperature ◽  
Crystal Phases ◽  
Potential Strategy ◽  
The Impact

Although the impact of individual functional groups on the self-assembly of columnar liquid crystal phases has been widely studied, the effect of varying multiple substituents has received much less attention. Herein, we report a series of dibenzo[a,c]phenazines containing an alcohol or ether adjacent to an electron-withdrawing ester or acid. With one exception, these difunctional mesogens form columnar phases. The phase behavior appeared to be dominated by the electron-withdrawing substituent; transition temperatures were similar to derivatives with these groups in isolation. In most instances, the addition of an electron-donating group ortho to an ester or acid suppressed the melting temperature and elevated the clearing temperature, leading to broader liquid crystal thermal ranges. This effect was more pronounced for derivatives functionalized with longer chain hexyloxy groups. These results suggest a potential strategy for controlling the phase ranges of columnar liquid crystals and achieving room temperature mesophases.

Self-assembly study of ammonium oleanolate and generation of gel– gold nanoparticle hybrid material

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Braja Gopal Bag ◽  
Subhajit Das
Keyword(s):  
Hybrid Material ◽  
Self Assembly ◽  
Room Temperature ◽  
Aqueous Ammonia ◽  
The Self ◽  
Solvent Mixtures ◽  
Optical Birefringence ◽  
Aqueous Solvent Mixtures ◽  
Aqueous Solvent ◽  
The Stability

A solution of oleanolic acid, a renewable nano-sized monohydroxy triterpenic acid in tetrahydrofuran, transformed into a gel instantly at room temperature on treatment with aqueous ammonia. Study of the self-assembly properties of ammonium oleanolate in water and aqueous solvent mixtures indicated that it self-assembles in the aqueous solvent mixtures forming gels in DMSO-water and DMF-water. Fibrillar networks with optical birefringence properties were observed by polarized optical microscopy. Scanning electron microscopy of the dried gel samples indicated fibrillar networks with fibers of nano to micrometer diameters. The thermodynamic parameters calculated from the gel to sol transition temperatures indicated the stability of the gels. A gel-gold nanoparticles hybrid material has also been prepared and characterized by HRTEM, EDX, SAED and surface Plasmon resonance studies.

The self-assembly mechanism of CaWO4@CaWO4:Dy3+ core/shell microspheres via a simple surfactant-free hydrothermal route

2015 ◽  
Vol 161 ◽  
pp. 100-103 ◽  
Author(s):  
Yang Song ◽  
Shuhua Liang ◽  
Feng Li ◽  
Xianhui Wang ◽  
Caiyin You ◽  
...  
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Core Shell ◽  
Hydrothermal Route ◽  
Assembly Mechanism

Porphyrin self-assembly as template for RNA?

2001 ◽  
Vol 05 (09) ◽  
pp. 691-701 ◽  
Author(s):  
GERLINDE BISCHOFF ◽  
ROBERT BISCHOFF ◽  
SIEGFRIED HOFFMANN
Keyword(s):  
Self Assembly ◽  
Electrostatic Interactions ◽  
Room Temperature ◽  
Helical Structure ◽  
Scanning Force Microscopy ◽  
The Self ◽  
Scanning Calorimetry ◽  
Low Salt ◽  
Aqueous Conditions ◽  
Increasing Temperature

The self-assembly of chiral porphyrin molecules HpD (hematoporphyrin IX derivative) has been shown to form helical fibers in low salt aqueous conditions. The spectroscopic (UV and circular dichroism (CD)), thermodynamic (Tm, differential scanning calorimetry (DSC)) and microscopic (light and scanning force microscopy (SFM)) examinations of the HpD properties were performed individually and in the presence of nucleic acid double strands (15–60 °C, 0–50 mM NaCl ). The asymmetric HpD molecules themselves at room temperature show sharp positive or negative CD signals, which increase enormously with HpD concentration. The data show strong evidence for the external self-stacking interaction of HpD , pure and in the presence of polynucleotides. At low salt concentration (<40 mM NaCl , pH 7) the spectra change completely by increasing the temperature. At 35 to 40 °C RNA-similar spectra of the pure HpD self-assemblies (without nucleic acids) occur. At higher temperatures the aggregates become unstable and break off. At room temperature the helical structure of the fibers could be visualized by SFM investigations. Molecular modeling analysis offers dynamic arrangements of the self-assemblies from stacks to spiral-like superstructures with increasing temperature. Hydrogen bonding, electron transferring and electrostatic interactions determine the shape of the proposed highly flexible arrangements. Moreover, the interrelation between the HpD stacks and the helix of the polynucleotides was studied. The calculated low transition energies indicate the importance of these structures as a crossing link. All data are discussed in favor of a hypothetical evolutionary matrix role in porphyrin self-assembly for RNA.

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