A room temperature, templated synthesis of lanthanide trifluoride nanoparticles and their unusual self-assembly

2014 ◽  
Vol 2 (9) ◽  
pp. 1597 ◽  
Author(s):  
Sandip Bhowmik ◽  
Tumpa Gorai ◽  
Uday Maitra
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Templated Synthesis

Green synthesis of mixed metallic nanoparticles using room temperature self-assembly

2017 ◽  
Vol 13 (2) ◽  
pp. 4671-4677 ◽  
Author(s):  
A. M. Abdelghany ◽  
A.H. Oraby ◽  
Awatif A Hindi ◽  
Doaa M El-Nagar ◽  
Fathia S Alhakami
Keyword(s):  
Self Assembly ◽  
Metallic Nanoparticles ◽  
Room Temperature ◽  
Bimetallic Nanoparticles ◽  
Reduction Process ◽  
Nano Particles ◽  
Nano Structure ◽  
Small Shift ◽  
Molar Ratios ◽  
Vis Spectroscopy

Bimetallic nanoparticles of silver (Ag) and gold (Au) were synthesized at room temperature using Curcumin. Reduction process of silver and gold ions with different molar ratios leads to production of different nanostructures including alloys and core-shells. Produced nanoparticles were characterized simultaneously with FTIR, UV/vis. spectroscopy, transmission electron microscopy (TEM), and Energy-dispersive X-ray (EDAX). UV/vis. optical absorption spectra of as synthesized nanoparticles reveals presence of surface palsmon resonance (SPR) of both silver at (425 nm) and gold at (540 nm) with small shift and broadness of gold band after mixing with resucing and capping agent in natural extract which suggest presence of bimetallic nano structure (Au/Ag). FTIR and EDAX data approve the presence of bimetallic nano structure combined with curcumin extract. TEM micrographs shows that silver and gold can be synthesized separately in the form of nano particles using curcumin extract. Synthesis of gold nano particles in presence of silver effectively enhance and control formation of bi-metallic structure.

scholarly journals Self-assembly induced luminescence of Eu3+-complexes and application in bioimaging

2021 ◽  
Author(s):  
Ping-Ru Su ◽  
Tao Wang ◽  
Pan-Pan Zhou ◽  
Xiao-Xi Yang ◽  
Xiao-Xia Feng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Luminescence Intensity ◽  
Self Assembly ◽  
Room Temperature ◽  
Molecular Motion ◽  
Proof Of Concept ◽  
Room Temperature Phosphorescence ◽  
New Strategy ◽  
Size Controlled

Abstract Design and engineering of highly efficient emitting materials with assembly-induced luminescence, such as room temperature phosphorescence (RTP) and aggregation-induced emission (AIE), have stimulated extensive efforts. Here, we propose a new strategy to obtain size-controlled Eu3+-complex nanoparticles (Eu-NPs) with self-assembly induced luminescence (SAIL) characteristics without encapsulation or hybridization. Compared with previous RTP or AIE materials, the SAIL phenomena of increased luminescence intensity and lifetime in aqueous solution for the proposed Eu-NPs are due to the combined effect of self-assembly in confining the molecular motion and shielding the water quenching. As a proof of concept, we also show that this system can be further applied in bioimaging, temperature measurement and HClO sensing. The SAIL activity of the rare-earth (RE) system proposed here offers a further step forward on the roadmap for the development of RE light conversion systems and their integration in bioimaging and therapy applications.

Correction to “Ligand Initiated Self-Assembly of Pt and Ir Nanoparticles about Ru(II) Diimines in Room Temperature Fluid Solution”

2013 ◽  
Vol 117 (7) ◽  
pp. 3683-3683
Author(s):  
Parbatee Samaroo Jagassar ◽  
Anthony Perri ◽  
Guillermo Ibarrola ◽  
Harry D. Gafney
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Fluid Solution

Room temperature synthesis of flower-like CaCO3 architectures

2016 ◽  
Vol 40 (1) ◽  
pp. 571-577 ◽  
Author(s):  
Lu-feng Yang ◽  
De-qing Chu ◽  
Hui-lou Sun ◽  
Ge Ge
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis ◽  
Assembly Mechanism

A proposed hierarchical self-assembly mechanism of the formation of flower-like vaterite superstructures.

scholarly journals RAFT-photomediated PISA in dispersion: mechanism, optical properties and application in templated synthesis

2019 ◽  
Vol 10 (18) ◽  
pp. 2316-2326 ◽  
Author(s):  
Vitalii Tkachenko ◽  
Camélia Matei Ghimbeu ◽  
Cyril Vaulot ◽  
Loïc Vidal ◽  
Julien Poly ◽  
...  
Keyword(s):  
Optical Properties ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Templated Synthesis ◽  
Dispersion Mechanism

Diblock copolymer nanoparticles were prepared by photomediated polymerization-induced self-assembly (“photo-PISA”) in dispersion.

Electron Microscopy Study of Submicron Size Antiferromagnetic KMnF3 Nanoparticles and Their Self-assembly

2003 ◽  
Vol 775 ◽  
Author(s):  
Jeffrey Anderson ◽  
Rubi Garcia ◽  
Weilie L. Zhou
Keyword(s):  
Electron Microscopy ◽  
Self Assembly ◽  
Room Temperature ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Submicron Particles ◽  
Spherical Particles ◽  
Large Area ◽  
Homogeneous Crystal ◽  
Field Emission Electron Microscopy

AbstractSubmicron KMnF3 cubic and spherical nanoparticles were synthesized using the reverse micelle method. The nanostructures of the nanocrystals were studied by field emission electron microscopy and transmission electron microscopy. KMnF3 nanocrystals synthesized at room temperature started with cubic submicron particles (∼100 nm) and consisted of KMnF3 nanocrystallites (10-15 nm). As the reaction continued, the nanocrystals fused together and transformed into perfect cubic nanocrystals. Spherical beads composed of KMnF3 nanocrystallites were observed at low temperature synthesis. As the reaction continued, the spherical particles grew larger, however, no characteristic cubic shape of KMnF3 nanoparticles were observed. Even as they grew larger, there was no evidence of homogeneous crystal morphology as seen in the room temperature samples. Cubic shape KMnF3 nanocrystals were self-assembled into large area self-assembling patterns.

In-line chemical shrink process for 70 nm contact hole patterns by the room-temperature electrostatic self-assembly

2005 ◽  
Author(s):  
Jung Hwan Hah ◽  
Subramanya Mayya ◽  
Mitsuhiro Hata ◽  
Hyun-Woo Kim ◽  
Man-Hyoung Ryoo ◽  
...  
Keyword(s):  
Self Assembly ◽  
Room Temperature

scholarly journals A New Heterogeneous Catalyst Obtained via Supramolecular Decoration of Graphene with a Pd2+ Azamacrocyclic Complex

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2714 ◽  
Author(s):  
Matteo Savastano ◽  
Paloma Arranz-Mascarós ◽  
Maria Paz Clares ◽  
Rafael Cuesta ◽  
Maria Luz Godino-Salido ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Self Assembly ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Assembly Process ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reaction ◽  
Green Procedure

A new G-(H2L)-Pd heterogeneous catalyst has been prepared via a self-assembly process consisting in the spontaneous adsorption, in water at room temperature, of a macrocyclic H2L ligand on graphene (G) (G + H2L = G-(H2L)), followed by decoration of the macrocycle with Pd2+ ions (G-(H2L) + Pd2+ = G-(H2L)-Pd) under the same mild conditions. This supramolecular approach is a sustainable (green) procedure that preserves the special characteristics of graphene and furnishes an efficient catalyst for the Cu-free Sonogashira cross coupling reaction between iodobenzene and phenylacetylene. Indeed, G-(H2L)-Pd shows an excellent conversion (90%) of reactants into diphenylacetylene under mild conditions (50 °C, water, aerobic atmosphere, 14 h). The catalyst proved to be reusable for at least four cycles, although decreasing yields down to 50% were observed.

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