scholarly journals Electrochemical preparation system for unique mesoporous hemisphere gold nanoparticles using block copolymer micelles

RSC Advances ◽  
2020 ◽  
Vol 10 (14) ◽  
pp. 8309-8313 ◽  
Author(s):  
Hyunsoo Lim ◽  
Tomota Nagaura ◽  
Minjun Kim ◽  
Kenya Kani ◽  
Jeonghun Kim ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Block Copolymer ◽  
Electrochemical Reduction ◽  
Au Nanoparticles ◽  
Electrochemical Preparation ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Self Assembled ◽  
First Time

Mesoporous hemisphere Au nanoparticles using self-assembled micelles, for the first time, are demonstrated by using electrochemical reduction on a Ti substrate.

Block Copolymer Micelles as Nanoreactors for Self-Assembled Morphologies of Gold Nanoparticles

2013 ◽  
Vol 117 (10) ◽  
pp. 3028-3039 ◽  
Author(s):  
Poonam Khullar ◽  
Vijender Singh ◽  
Aabroo Mahal ◽  
Harsh Kumar ◽  
Gurinder Kaur ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Block Copolymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Self Assembled

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.

Extremely Bright Full Color Alternating Current Electroluminescence of Solution-Blended Fluorescent Polymers with Self-Assembled Block Copolymer Micelles

ACS Nano ◽  
2013 ◽  
Vol 7 (12) ◽  
pp. 10809-10817 ◽  
Author(s):  
Sung Hwan Cho ◽  
Seong Soon Jo ◽  
Ihn Hwang ◽  
Jinwoo Sung ◽  
Jungmok Seo ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Alternating Current ◽  
Full Color ◽  
Fluorescent Polymers ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Self Assembled

Nanoporous Gold Films Created Using Templates Formed from Self-Assembled Structures of Inorganic–Block Copolymer Micelles

2003 ◽  
Vol 15 (10) ◽  
pp. 829-831 ◽  
Author(s):  
M. Haupt ◽  
S. Miller ◽  
R. Glass ◽  
M. Arnold ◽  
R. Sauer ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Nanoporous Gold ◽  
Gold Films ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Self Assembled

Controlled organization of self-assembled rod-coil block copolymer micelles

Polymer ◽  
2009 ◽  
Vol 50 (22) ◽  
pp. 5170-5174 ◽  
Author(s):  
Yingfeng Tu ◽  
Matthew J. Graham ◽  
Ryan M. Van Horn ◽  
Erqian Chen ◽  
Xinhe Fan ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Self Assembled
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