A One-Dimensional Superstructure from the Self-Assembly of Ag Nanoparticles Induced by Cu2+ Ion Coordination

2012 ◽  
Vol 65 (1) ◽  
pp. 81 ◽  
Author(s):  
Santosh V. Nalage ◽  
Namdev V. Ghule ◽  
Sidhanath V. Bhosale ◽  
Sheshanath V. Bhosale
Keyword(s):  
Silver Nanoparticles ◽  
Self Assembly ◽  
The Self ◽  
Organic Template ◽  
Spherical Nanoparticles ◽  
Variable Size ◽  
One Dimensional ◽  
X Ray ◽  
Copper Cations ◽  
One Dimensional Nanostructures

The self-assembly of spherical silver nanoparticles with variable size and controlled organization using triglycine as an organic template is described. Triglycine and silver nitrate were used as the starting materials for the preparation of the spherical nanoparticles, and in the presence of copper cations, the particles further self-assembled into one dimensional nanostructures. The formation of supramolecular nanoaggregates was evaluated by means of UV/vis, TEM, SEM, and energy dispersive X-ray spectroscopy.

Hierarchic self-assembling of silver nanoparticles in solution

2012 ◽  
Vol 1 (1) ◽  
pp. 57-78 ◽  
Author(s):  
Lorenza Suber ◽  
Gaetano Campi
Keyword(s):  
Silver Nanoparticles ◽  
Self Assembly ◽  
Time Resolved ◽  
One Dimensional ◽  
X Ray ◽  
Self Assembling ◽  
X Ray Scattering ◽  
Complex Forms ◽  
2D And 3D

AbstractFacile chemical synthesis and understanding of the formation mechanism of silver nanoparticles, ordered on the microscale on one-dimensional (1D), 2D or in 3D structures of complex forms is challenging for advanced applications, in electronics, optoelectronics, and medicine, to mention a few. Significant results obtained in the comprehension of assembling mechanisms in solutions of silver nanoparticles in 1D, 2D, and 3D organic-inorganic mesostructures are surveyed together with details on their preparation and characterization. Emphasis will be placed on very recent results obtained in our laboratories on self-assembly of silver nanoparticles in 1D microstructures and hierarchic ordering in 3D flower-like mesostructures monitored and studied by in situ and time-resolved small angle X-ray scattering (SAXS) measurements.

The Evaluation of TiTe2 as a Diffusion Barrier in the Formation of Low Thermal Conductivity Nanolaminates with Bi2Te3 and Sb2Te3

2010 ◽  
Vol 74 ◽  
pp. 38-47
Author(s):  
Clay Mortensen ◽  
Paul Zschack ◽  
David C. Johnson
Keyword(s):  
Thermal Conductivity ◽  
Diffusion Barrier ◽  
Self Assembly ◽  
Low Temperatures ◽  
Annealing Temperature ◽  
The Self ◽  
High Angle ◽  
X Ray Diffraction ◽  
Amorphous Precursor ◽  
X Ray

The evolution of designed [(Ti-Te)]x[(Sb-Te)]y, [(Bi-Te)]x[(Sb-Te)]y, [(Ti-Te)]w[(Bi-Te)]x[(Sb-Te)]y and [(Ti-Te)]w[(Bi-Te)]x[(Ti-Te)]y[(Sb-Te)]z precursors were followed as a function of annealing temperature and time using both low and high angle x-ray diffraction techniques to probe the self assembly into nanolaminate materials. The [(Bi-Te)]x[(Sb-Te)]y precursors were found to interdiffuse at low temperatures to form a (BixSb1-x)2Te3 alloy. The [(Ti-Te)]x[(Bi-Te)]y and [(Ti-Te)]x[(Sb-Te)]y precursors formed ordered nanolaminates [{(TiTe2)}1.35]x[Bi2Te3]y and [{(TiTe2)}1.35]x[Sb2Te3]y respectively. The [(Ti-Te)]w[(Bi-Te)]x[(Sb-Te)]x precursors formed [{(TiTe2)}1.35]w[(Bi0.5Sb0.5)2Te3]2x nanolaminates on annealing, as the bismuth and antimony layers interdiffused. Over the range of TiTe2 thicknesses used in [(Ti-Te)]w[(Bi-Te)]x[(Ti-Te)]y[(Sb-Te)]z precursors, Bi and Sb were found to interdiffuse through the 2-4 nm thick Ti-Te layers, resulting in the formation of (BixSb1-x)2Te3 alloy layers as part of the final nanolaminated products. When the Bi-Te and Sb-Te thicknesses were equal in the amorphous precursors, symmetric [{(TiTe2)}1.35]m[(Bi0.5Sb0.5)2Te3]n nanolamiantes were formed. When the thicknesses of Bi-Te and Sb-Te layers were not equal in the amorphous precursor, asymmetric [(TiTe2)1.35]m[(BixSb1-x)2Te3]n[(TiTe2)1.35]m[(BixSb1-x)2Te3]p nanolaminates were formed. These results imply that to form (A)w(B)x(C)y nanolaminates using designed layered precursors all three components must be immiscible. To form (A)x(B)y(A)x(C)z nanolaminates, the components must be immiscible or the precursor to the A component and the A component itself must be an effective interdiffusion barrier preventing B and C from mixing.

A smart sensing Zn (Ⅱ) coordination polymer based on a new viologen ligand exhibiting photochromic and thermochromic and multiple solid detection properties

2021 ◽  
Author(s):  
Heyi Zhang ◽  
Fangyuan He ◽  
Xiaonan Li ◽  
Zhi-Hui Wang ◽  
Hong Zhang
Keyword(s):  
Electron Transfer ◽  
Coordination Polymer ◽  
Self Assembly ◽  
Chain Structure ◽  
The Self ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Smart Sensing

Through the self-assembly of 1,1'-bis(3-cyanobenzyl)-[4,4'-bipyridine] dichloride ligand, m-H2BDC and Zn(NO3)2·6H2O, a novel one-dimensional chain structure multifunctional coordination polymer was successfully synthesized. Due to electron transfer during irradiation and heating to...

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.

Synthese und Koordinationschemie eines neuartigen Bistetrazols: Ein 1D-Metallopolymer durch Selbstorganisation koordinativ ungesättigter Zink(II)-M4onomere [1] / Synthesis and Coordination Chemistry of a New Bistetrazole: A 1D-Metallopolymer via Self-Assembly of Monomeric Zinc(II)-Buildingblocks

1995 ◽  
Vol 50 (4) ◽  
pp. 642-648 ◽  
Author(s):  
Rolf W. Saalfrank ◽  
Klaus Schobert ◽  
Stefan Trümmer ◽  
Alexander Wolski
Keyword(s):  
Coordination Chemistry ◽  
Self Assembly ◽  
Intermediate Formation ◽  
The Self ◽  
Polymeric Chain ◽  
X Ray Diffraction ◽  
Bridging Ligands ◽  
Subsequent Formation ◽  
X Ray ◽  
Polymeric Compounds

The new bistetrazole 13 has been obtained by subsequent formation of the two heterocyclic units. In methanolic solution 13 reacts with zinc(II) acetate to yield the pseudo-meso-1 D-coordination polymer [ZnL2(MeOH)]n (n = ∞) 14. The structure of 14 was established by single crystal X-ray diffraction. The generation of the polymeric chain 14 is understandable, if intermediate formation of coordinatively unsaturated zinc(II) buildingblocks (Δ)-15 and (Λ)-15 is assumed. Alternating linkage of the self-complementary chiral monomers 15, across one cyanofunction each, leads to 14 with zinc being essentially octahedrally coordinated. Compared with polymeric compounds of similar bridging ligands, the Zn ··· N≡C-distance in 14 (225,7 pm) is short.

scholarly journals Self-assembly of block copolymers during hollow fiber spinning: an in situ small-angle X-ray scattering study

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7634-7647 ◽  
Author(s):  
Kirti Sankhala ◽  
D. C. Florian Wieland ◽  
Joachim Koll ◽  
Maryam Radjabian ◽  
Clarissa Abetz ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Hollow Fiber ◽  
Small Angle ◽  
Self Assembly ◽  
Fiber Spinning ◽  
The Self ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study

A study of the self-assembly of block copolymers in ordered and weakly segregated solutions after extrusion during fabrication of isoporous hollow fiber membranes.

scholarly journals Influence of the cis/trans configuration on the supramolecular aggregation of aryltriazoles

2019 ◽  
Vol 15 ◽  
pp. 2881-2888
Author(s):  
Sara Tejera ◽  
Giada Caniglia ◽  
Rosa L Dorta ◽  
Andrea Favero ◽  
Javier González-Platas ◽  
...  
Keyword(s):  
Self Assembly ◽  
Bromine Atom ◽  
The Self ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
X Ray ◽  
High Degree ◽  
Crystal Packings ◽  
Supramolecular Aggregation ◽  
Self Aggregation

The ability of trans- and cis-1,2-glucopyranosyl and cyclohexyl ditriazoles, synthesized by CuAAC "click" chemistry, to form gels was studied, their physical properties determined, and the self-aggregation behavior investigated by SEM, X-ray, and EDC studies. The results revealed that self-assembly was driven mainly by π–π stacking interactions, in addition to hydrogen bonding, with the aromatic rings adopting a high degree of parallelism, as seen in crystal packings and ECD data. Furthermore, π–bromine interactions between the bromine atom of the aryl substituents and the triazole units might also contribute to an overall stabilization of the supramolecular aggregation of bis(4-bromophenyl)triazoles. The trans or cis spatial disposition of the triazole rings is highly important for gelation, with the cis configuration having higher propensity.

Fabrication and Hydrogen Sensing Property of In2O3 Nanotowers

2013 ◽  
Vol 834-836 ◽  
pp. 913-916
Author(s):  
Zhao Qiang Zheng ◽  
Huan Yu Wu ◽  
Bing Wang
Keyword(s):  
Self Assembly ◽  
Thermal Evaporation ◽  
Sensor Response ◽  
The Self ◽  
X Ray Diffraction ◽  
Excellent Performance ◽  
X Ray ◽  
Hydrogen Sensing ◽  
Morphology And Structure ◽  
Prepared Nanorods

In2O3nanotowers have been fabricated on Au item-shaped parallel electrodes using thermal evaporation of the mixed powders of In2O3and graphite with Au catalysts. The morphology and structure of the prepared nanorods are determined on the basis of field-emission scanning electron microscopy (FESEM) and x-ray diffraction (XRD). The self-assembly grown sensors of In2O3nanotowers have excellent performance in sensor response to hydrogen concentration of 1000 ppm under operated temperature of 300°C.

Sign in / Sign up

Export Citation Format

Share Document