Self-assembly of a new class of amphiphilic poly(amidoamine) dendrimers and their electrochemical properties

2005 ◽  
Vol 43 (22) ◽  
pp. 5512-5519 ◽  
Author(s):  
Bing-Bing Wang ◽  
Xin Zhang ◽  
Xin-Ru Jia ◽  
Zi-Chen Li ◽  
Yan Ji ◽  
...  
2018 ◽  
Author(s):  
Erik Leonhardt ◽  
Jeff M. Van Raden ◽  
David Miller ◽  
Lev N. Zakharov ◽  
Benjamin Aleman ◽  
...  

Extended carbon nanostructures, such as carbon nanotubes (CNTs), exhibit remarkable properties but are difficult to synthesize uniformly. Herein, we present a new class of carbon nanomaterials constructed via the bottom-up self-assembly of cylindrical, atomically-precise small molecules. Guided by supramolecular design principles and circle packing theory, we have designed and synthesized a fluorinated nanohoop that, in the solid-state, self-assembles into nanotube-like arrays with channel diameters of precisely 1.63 nm. A mild solution-casting technique is then used to construct vertical “forests” of these arrays on a highly-ordered pyrolytic graphite (HOPG) surface through epitaxial growth. Furthermore, we show that a basic property of nanohoops, fluorescence, is readily transferred to the bulk phase, implying that the properties of these materials can be directly altered via precise functionalization of their nanohoop building blocks. The strategy presented is expected to have broader applications in the development of new graphitic nanomaterials with π-rich cavities reminiscent of CNTs.


Membranes ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 11
Author(s):  
Damian Dziubak ◽  
Kamil Strzelak ◽  
Slawomir Sek

Supported lipid membranes are widely used platforms which serve as simplified models of cell membranes. Among numerous methods used for preparation of planar lipid films, self-assembly of bicelles appears to be promising strategy. Therefore, in this paper we have examined the mechanism of formation and the electrochemical properties of lipid films deposited onto thioglucose-modified gold electrodes from bicellar mixtures. It was found that adsorption of the bicelles occurs by replacement of interfacial water and it leads to formation of a double bilayer structure on the electrode surface. The resulting lipid assembly contains numerous defects and pinholes which affect the permeability of the membrane for ions and water. Significant improvement in morphology and electrochemical characteristics is achieved upon freeze–thaw treatment of the deposited membrane. The lipid assembly is rearranged to single bilayer configuration with locally occurring patches of the second bilayer, and the number of pinholes is substantially decreased. Electrochemical characterization of the lipid membrane after freeze–thaw treatment demonstrated that its permeability for ions and water is significantly reduced, which was manifested by the relatively high value of the membrane resistance.


Author(s):  
Om Shanker Tiwari

The synthesis, nanostructure self-assembly and electrochemical properties of a series of ferrocene conjugated peptides derived from the dipeptide Phe-Phe, nucleoside and the peptide nucleic acid unit which are covalently attached...


2018 ◽  
Vol 16 (19) ◽  
pp. 3584-3595 ◽  
Author(s):  
Shin-ichiro Kato ◽  
Satoshi Jin ◽  
Terutaka Kimura ◽  
Naoki Yoshikawa ◽  
Daiki Nara ◽  
...  

We synthesized the first members of trithiazolyl-1,3,5-triazines that combine attractive photophysical and self-assembling properties.


2019 ◽  
Vol 295 ◽  
pp. 111687 ◽  
Author(s):  
Supreet Kaur ◽  
Golam Mohiuddin ◽  
Vidhika Punjani ◽  
Raj Kumar Khan ◽  
Sharmistha Ghosh ◽  
...  

2008 ◽  
Vol 8 (3) ◽  
pp. 1494-1496 ◽  
Author(s):  
Xu Chun Song ◽  
Yi Fan Zheng ◽  
E. Yang ◽  
Yun Wang

The α-MnO2 spherical assemblies were prepared via a facile hydrothermal approach in the presence of sodium dodecyl sulfate (SDS). The assembled nanostructures were composed of the MnO2 nanorods with 150–200 nm in width and several micrometers in length. The products were characterized by SEM, TEM and XRD. The electrochemical characterization was carried out by cyclic voltammetry, which indicated that the α-MnO2 spherical assemblies were of an excellent electrode material for supercapacitor.


2016 ◽  
Vol 11 (6) ◽  
pp. 839-843 ◽  
Author(s):  
Cheng Qian ◽  
Wei-Hao Zhao ◽  
Yuan Tian ◽  
Guo-Fang Jiang ◽  
Tian-Guang Zhan ◽  
...  

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