scholarly journals Toll-like receptor agonist lipopeptides self-assemble into distinct nanostructures

2014 ◽  
Vol 50 (100) ◽  
pp. 15948-15951 ◽  
Author(s):  
Ian W. Hamley ◽  
Steven Kirkham ◽  
Ashkan Dehsorkhi ◽  
Valeria Castelletto ◽  
Mehedi Reza ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Receptor Agonist ◽  
The Self ◽  
Peptide Sequence ◽  
Toll Like Receptor ◽  
Self Assembled

The self-assembled structure of toll-like receptor agonist lipopeptides containing the CSK4 peptide sequence is examined in aqueous solution.

scholarly journals Self-assembled chromogen-loaded polymeric cocoon for respiratory virus detection

Nanoscale ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 388-396
Author(s):  
Indra Memdi Khoris ◽  
Akhilesh Babu Ganganboina ◽  
Tetsuro Suzuki ◽  
Enoch Y. Park
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Respiratory Virus ◽  
Virus Detection ◽  
The Self ◽  
Signal Molecules ◽  
Self Assembled

Inspired by the self-assembly approach, in this work, the chromogen, 3,3′,5,5′-tetramethylbenzidine (TMB), was successfully co-precipitated in aqueous solution to form collective nanoparticles (NPs) of signal molecules (TMB-NPs).

SANS study on self-assembled structures of Pluronic F127 triblock copolymer induced by additives and temperature

2013 ◽  
Vol 47 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Tae-Hwan Kim ◽  
Young-Soo Han ◽  
Jong-Dae Jang ◽  
Baek-Seok Seong
Keyword(s):  
Aqueous Solution ◽  
Triblock Copolymer ◽  
Structural Information ◽  
Material Balance ◽  
The Self ◽  
Pluronic F127 ◽  
Spherical Micelle ◽  
Simple Material ◽  
Temperature Range ◽  
Self Assembled

In the temperature range of 303–333 K, the self-assembled structures of a mixture of Pluronic F127 triblock copolymer [PEO106PPO70PEO106; PEO is poly(ethylene oxide) and PPO is poly(propylene oxide)] and an organic derivative, 5-methyl salicylic acid (5mS), in aqueous solution have been investigated using small-angle neutron scattering (SANS). Above a 5mS concentration of 1.93 g l−1, the F127–5mS mixture solution became cloudy with a blue colour arising from the Tyndall effect, indicating that large polymer aggregates had formed in the mixture solution. SANS measurements showed that the self-assembled structure of the F127–5mS mixture transformed from a spherical to a cylindrical micelle with increasing the concentration of 5mS in the temperature range of 303–323 K. When the 5mS concentration was increased to 3.3 g l−1, the self-assembled structure of the F127–5mS mixture at 333 K underwent an additional phase transition from a cylindrical to a spherical micelle of large size at a 5mS concentration of 2.75 g l−1, although its self-assembled structure changed from a spherical to a cylindrical micelle at a 5mS concentration of 1.93 g l−1as well. The phase transitions are explained by the variation of the mass fraction of the hydrophilic part of F127 and the coupled effect of the limited solubility and the strong tendency to bind with amphiphilic molecules of 5mS. Using a simple material balance equation and the structural information obtained from SANS model analyses, the numbers of D2O and of 5mS molecules in the core and corona regions are calculated. This result can provide a simple and easy way to prepare various nanostructures using a Pluronic triblock copolymer in aqueous solution and may be very useful for practical applications of a Pluronic polymer such as various nanobuilding blocks or nanotemplates.

scholarly journals Investigation on the self-assembled behaviors of C18unsaturated fatty acids in arginine aqueous solution

RSC Advances ◽  
2017 ◽  
Vol 7 (66) ◽  
pp. 41561-41572 ◽  
Author(s):  
Yuxian Wang ◽  
Ling Jiang ◽  
Qinke Shen ◽  
Jian Shen ◽  
Yuwang Han ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Aqueous Solution ◽  
Fatty Acids ◽  
Theoretical Basis ◽  
The Self ◽  
Self Assembled

Self-assembled behaviors of UFAs in arginine solution have provided a theoretical basis for the application of two functional molecules in drug delivery.

Study of Pt Nanoparticles Protected by 1-Dodecanethiol Self-Assembled Films on Iron Surface Using Electrochemical Methods,UV-Vis and XPS Measurements

2011 ◽  
Vol 239-242 ◽  
pp. 273-278
Author(s):  
Zhe Zhang ◽  
Le Ruan ◽  
Ming Zi Jia ◽  
Ji Qiong Jiang ◽  
Xing Shen Deng
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Impedance Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Pt Nanoparticles ◽  
The Self ◽  
Iron Surface ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Self Assembled

In this article, Pt nanoparticles protected by 1-dodecanethiol (DDT) were self-assembled on iron surface forming mixed self-assembled films. Those nanoparticles were prepared in aqueous solution and transferred from water phase to toluene phase. The self-assembled films of nanoparticles protected by DDT were prepared on iron surface. The nanoparticles were characterized by UV-vis spectroscopy. Electrochemical impedance spectroscopy (EIS), polarization curves, X-ray photoelectron spectroscopy (XPS) were applied to characterize the self-assembled films on iron surface.

The use of endogenous gaseous molecules (NO and CO2) to regulate the self-assembly of a dual-responsive triblock copolymer

2015 ◽  
Vol 6 (13) ◽  
pp. 2407-2415 ◽  
Author(s):  
Jinming Hu ◽  
Michael R. Whittaker ◽  
Yang Li ◽  
John F. Quinn ◽  
Thomas P. Davis
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Block Copolymer ◽  
Self Assembly ◽  
Triblock Copolymer ◽  
The Self ◽  
Dual Responsive ◽  
Self Assembled

A nitric oxide (NO) and carbon dioxide (CO2) dual-responsive block copolymer was self-assembled in aqueous solution upon gas stimuli to form nanostructures.

scholarly journals Self-Assembled Nano-Fe3C Embedded in Reduced Graphene Oxide Aerogel with Efficient Fenton-Like Catalysis

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2348
Author(s):  
Liping Wang ◽  
Mingyu Zhang ◽  
Jiawei Xie
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Reduced Graphene Oxide ◽  
Catalytic Degradation ◽  
The Self ◽  
High Temperature Treatment ◽  
Order Kinetic ◽  
Reduced Graphene ◽  
Self Assembled

Aiming at the removal of refractory organic pollutants in aqueous solution, self-assembled nano-Fe3C embedded in reduced graphene oxide (nano-Fe3C@RGO) aerogel was prepared by hydrothermal synthesis and high temperature treatment, and characterized by SEM, HRTEM, pore size distribution, XRD, XPS and FTIR. The results showed that the aerogel was porous, and most of the Fe3C particles were less than 100 nm in size. They were evenly dispersed and embedded in the RGO aerogel. Furthermore, the mapping images confirmed that the elements of carbon, nitrogen and iron were homogeneously distributed. Moreover, the specific surface area of the aerogel was up to 324.770 m2/g and most of the pore sizes were between 5 and 10 nm. The formation of nano-Fe3C was identified by XRD pattern and HRTEM. Analysis of an XPS spectrum indicates that the nano-Fe3C was embedded in the graphene layer. The aerogel contained a large number of functional groups, including –NH2, –NH and –C=O, etc., which greatly strengthened the adsorption of organics. Finally, the Fenton-like catalytic degradation properties of the self-assembled nano-Fe3C@RGO aerogel were investigated by testing the removal of methyl orange from the aqueous solution. The results showed that the value of Ct/C0 decreased to 0.050 after 240 min, suggesting a high degradation rate was obtained. Meanwhile, the chemical reaction was verified in accordance with the first-order kinetic model, and the higher temperature was beneficial to the catalytic degradation. At the same time, methyl orange was degraded into small molecules by the hydroxyl and superoxide radicals generated during the reactions. Therefore, the self-assembled nano-Fe3C@RGO aerogel, as a novel Fenton-like catalyst, introduces a new approach in the field of treatment of refractory organic wastewater.

Self-assembled metallogels formed from N,N′,N′′-tris(4-pyridyl)trimesic amide in aqueous solution induced by Fe(iii)/Fe(ii) ions

Soft Matter ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 191-199 ◽  
Author(s):  
Jin-Lian Zhong ◽  
Xin-Jian Jia ◽  
Hui-Jin Liu ◽  
Xu-Zhong Luo ◽  
San-Guo Hong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
High Selectivity ◽  
The Self ◽  
Self Assembled

We report the self-assembled metallogels formed from N,N′,N′′-tris(4-pyridyl)trimesic amide (TPTA) in aqueous solution containing Fe3+/Fe2+. This high selectivity of metallogel formation to Fe3+/Fe2+ may be used for the metallogel application in the test of Fe3+/Fe2+.

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.

scholarly journals Self-Assembled Nanomaterials Based on Complementary Sn(IV) and Zn(II)-Porphyrins, and Their Photocatalytic Degradation for Rhodamine B Dye

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3598
Author(s):  
Nirmal K. Shee ◽  
Hee-Joon Kim
Keyword(s):  
Aqueous Solution ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Self Assembly ◽  
The Self ◽  
Assembly Process ◽  
Absorption Bands ◽  
Ligand Coordination ◽  
Rhodamine B Dye ◽  
Metal Ligand

A series of porphyrin triads (1–6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal–ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV–vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles.

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