scholarly journals Naturally self-assembled nickel nanolattice

2014 ◽  
Vol 2 (42) ◽  
pp. 8918-8924 ◽  
Author(s):  
Jaiveer Singh ◽  
Netram Kaurav ◽  
Niranjan Prasad Lalla ◽  
Gunadhor Singh Okram
Keyword(s):  
Electrostatic Interactions ◽  
Nickel Nanoparticles ◽  
New Era ◽  
Hexagonal Close Packed ◽  
Self Assembled

Hexagonal close-packed nanolattices of monodispersed nickel nanoparticles have been discovered with trioctylphosphine as one of the surfactants, without extra forces. Their origin appears to be due to electrostatic interactions. This finding is expected to open up a new era in natural nanolattice research.

Soft, Wet-Chemical Synthesis of Metastable Superparamagnetic Hexagonal Close-Packed Nickel Nanoparticles in Different Ionic Liquids

2017 ◽  
Vol 23 (26) ◽  
pp. 6330-6340 ◽  
Author(s):  
Susann Wegner ◽  
Christina Rutz ◽  
Kai Schütte ◽  
Juri Barthel ◽  
Alexey Bushmelev ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Chemical Synthesis ◽  
Nickel Nanoparticles ◽  
Wet Chemical Synthesis ◽  
Hexagonal Close Packed ◽  
Wet Chemical

Three-dimensional hydrogen bonding between Landers and planar molecules facilitated by electrostatic interactions with Ni adatoms

2018 ◽  
Vol 54 (64) ◽  
pp. 8845-8848 ◽  
Author(s):  
Miao Yu ◽  
Youness Benjalal ◽  
Chong Chen ◽  
Nataliya Kalashnyk ◽  
Wei Xu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Electrostatic Interactions ◽  
Molecular System ◽  
Three Dimensional ◽  
Planar Molecules ◽  
Self Assembled

Ni adatoms are at the origin of a self-assembled bicomponent molecular system on Au(111).

scholarly journals Close-packed block copolymer micelles induced by temperature quenching

2018 ◽  
Vol 115 (28) ◽  
pp. 7218-7223 ◽  
Author(s):  
Liwen Chen ◽  
Han Seung Lee ◽  
Sangwoo Lee
Keyword(s):  
Block Copolymer ◽  
Spherical Particles ◽  
Face Centered Cubic ◽  
Time Resolved ◽  
Hexagonal Close Packed ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Crystal Grains ◽  
Self Assembled ◽  
Face Centered

Close-packed structures of uniformly sized spheres are ubiquitous across diverse material systems including elements, micelles, and colloidal assemblies. However, the controlled access to a specific symmetry of self-assembled close-packed spherical particles has not been well established. We investigated the ordering of spherical block copolymer micelles in aqueous solutions that was induced by rapid temperature changes referred to as quenching. As a function of quench depth, the quenched self-assembled block copolymer micelles formed three different close-packed structures: face-centered cubic (fcc), random stacking of hexagonal-close-packed layers (rhcp), and hexagonal-close-packed (hcp). The induced hcp and rhcp structures were stable for at least a few weeks when maintained at their quench temperatures, but heating or cooling these hcp and rhcp structures transformed both structures to fcc crystallites with coarsening of the crystal grains, which suggests that these noncubic close-packed structures are intermediate states. Time-resolved scattering experiments prove that the micellar rhcp structures do not originate from the rapid growth of competing close-packed structures. We speculate that the long-lived metastable hcp and rhcp structures originate from the small size of crystal grains, which introduces a nonnegligible Laplace pressure to the crystal domains. The reported transitions from the less stable hcp to the more stable rhcp and fcc are experimental observations of Ostwald’s rule manifesting the transition order of the key close-packed structures in the crystallization of close-packed uniform spheres.

Effects of Substrates on the Self-Assembling of FePt Nanocrystals

2001 ◽  
Vol 674 ◽  
Author(s):  
Min Chen ◽  
David E. Nikles
Keyword(s):  
Chemical Reduction ◽  
Average Diameter ◽  
Iron Pentacarbonyl ◽  
Fept Nanoparticles ◽  
Hexagonal Close Packed ◽  
Self Assembling ◽  
Hydrocarbon Solvents ◽  
Carbon Coated ◽  
Self Assembled ◽  
Hexagonal Arrays

ABSTRACTFe48Pt52 nanoparticles were synthesized by the simultaneous chemical reduction of platinum acetylacetonate and thermal decomposition of iron pentacarbonyl. As-prepared the particles were spherical with an average diameter of 3 nm and a polydispersity of less than 5%. The particles were superparamagnetic and had a fcc structure. Highly ordered self-assembled supercrystals of particles were formed in TEM grids by deposition from dispersions in hydrocarbon solvents. Nanoparticles deposited on amorphous carbon-coated and SiO2-coated Cu grids tend to assemble into small domains of hexagonal arrays. Larger domains of hexagonal arrays formed on Si3N4 membrane TEM grids. For thin multilayers, the FePt nanoparticles tends to assemble into hexagonal close-packed lattices (ABABAB stacking). For the thicker multilayers, ABCABC stacking was observed. Small angle X-ray reflectivity of the particles on a Si (100) substrate show highly ordered multiplanar structure with d-spacing of 6.2 nm. The coercivity of self-assembled FePt films strongly depended on the annealing temperature. After annealing at 700°C for 30 minutes, the particles transformed from FCC to “FCT” phase and the coercivity of film increased up to 11570 Oe. However, the particle size increased to 16 nm due to sintering.

Immobilization of Gold Nanorods onto Acid-Terminated Self-Assembled Monolayers via Electrostatic Interactions

Langmuir ◽  
2004 ◽  
Vol 20 (17) ◽  
pp. 7117-7122 ◽  
Author(s):  
Anand Gole ◽  
Christopher J. Orendorff ◽  
Catherine J. Murphy
Keyword(s):  
Gold Nanorods ◽  
Electrostatic Interactions ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

pH-Dependent rectification in self-assembled monolayers based on electrostatic interactions

2006 ◽  
pp. 183-185 ◽  
Author(s):  
Seongpil Hwang ◽  
Young Shik Chi ◽  
Bang Sook Lee ◽  
Sang-gi Lee ◽  
Insung S. Choi ◽  
...  
Keyword(s):  
Electrostatic Interactions ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Ph Dependent ◽  
Self Assembled

scholarly journals Self-Assembled Monolayer of Mixed Gold and Nickel Nanoparticles

2012 ◽  
Vol 4 (3) ◽  
pp. 166-171 ◽  
Author(s):  
Yanni Jie ◽  
Huiqing Fan ◽  
Wei You
Keyword(s):  
Nickel Nanoparticles ◽  
Self Assembled Monolayer ◽  
Self Assembled

FABRICATION, ASSEMBLY AND MAGNETIC PROPERTIES OF NICKEL HOLLOW NANOBALLS

2006 ◽  
Vol 20 (10) ◽  
pp. 549-555 ◽  
Author(s):  
JUN WANG ◽  
YUEJIN ZHU ◽  
YEJUN WU ◽  
CHANGJUN WU ◽  
DONGFENG XU ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Properties ◽  
Strong Interaction ◽  
Nickel Nanoparticles ◽  
Transmission Electron ◽  
Metallic Cations ◽  
Self Assembled ◽  
Hollow Metal

Nanoshells composed of close-packed nickel nanoparticles have been fabricated on sillca spheres via strong interaction between the metallic cations and ions of the support. The nickel hollow nanoballs can be self-assembled via magnetic field-assisted route, which is confirmed by the transmission electron microscopy. The magnetic properties of Ni nanoshells are discussed. It is expected that the prepared method can be extended to the synthesis of other hollow metal spheres.

Self-Assembled Nickel Nanoparticles Supported on Mesoporous Aluminum Oxide for Selective Hydrogenation of Isophorone

2018 ◽  
Vol 7 (4) ◽  
pp. 757-762 ◽  
Author(s):  
Leilei Hou ◽  
Wenqiang Du ◽  
Minjie Qu ◽  
Xinhong Wang ◽  
Shuwei Wang ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Selective Hydrogenation ◽  
Nickel Nanoparticles ◽  
Self Assembled
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