Ordered Nanoparticle Arrays Synthesized from Self-Assembled Diblock Copolymer Templates

2009 ◽  
Vol 1174 ◽  
Author(s):  
Jennifer Lu ◽  
Qiang Fu ◽  
Anita Ghia ◽  
Chi-shuo Chen
Keyword(s):  
Diblock Copolymer ◽  
Solution Concentration ◽  
Nanoparticle Arrays ◽  
Transitional Metals ◽  
Ionic Bonds ◽  
Copolymer Micelle ◽  
Block Copolymer Micelles ◽  
Coordination Bonds ◽  
Copolymer Micelles ◽  
New Applications

AbstractWe present a comprehensive study of using diblock copolymer micelle templates to synthesize ordered nanoparticle arrays. Ionic and coordination bonds have been exploited to incorporate nanoparticle precursors into cores of block copolymer micelles. Polystyrene-b-poly (4-vinylpyridine) (PS-b-P4VP) has been shown to be able to localize anions via electrostatic attraction with protonated pyridine cations while transitional metals can be sequestered through coordination bonds. Polystyrene-b-poly (acrylic acid) (PS-PAA) can localize a variety of cations via ionic bonds with acrylic anions. We have demonstrated that the size of nanoparticles can be tuned by controlling the solution concentration of an ionic precursor. By mixing these two distinct block copolymers which can selectively interact with different precursor species, complex nanoparticle architectures can be generated thus paving a path for new applications.

Bimetallic PdAg nanoparticle arrays from monolayer films of diblock copolymer micelles

Nanoscale ◽  
2015 ◽  
Vol 7 (31) ◽  
pp. 13239-13248 ◽  
Author(s):  
E. Ehret ◽  
E. Beyou ◽  
G. V. Mamontov ◽  
T. A. Bugrova ◽  
S. Prakash ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Nanoparticle Arrays ◽  
Monolayer Films ◽  
Copolymer Micelles

A Simple and Convenient Method to Fabricate Hexagonally Ordered Gold Nanoparticle Arrays Using Diblock Copolymer Micelle Template

2010 ◽  
Vol 39 (8) ◽  
pp. 902-904 ◽  
Author(s):  
Shigeru Watanabe ◽  
Shin Nakano ◽  
Chie Imai ◽  
Inamur R. Laskar ◽  
Tomonori Komura ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Diblock Copolymer ◽  
Convenient Method ◽  
Nanoparticle Arrays ◽  
Copolymer Micelle ◽  
Hexagonally Ordered

Sub-10 nm Gold Nanoarrays for Tethering Single Molecules

2001 ◽  
Vol 676 ◽  
Author(s):  
Vanessa Z-H. Chan ◽  
Sarah L. Codd ◽  
Mark J. van der Helm ◽  
Joachim P. Spatz ◽  
Carlheinz Röcker ◽  
...  
Keyword(s):  
Electron Beam ◽  
Block Copolymer ◽  
Hydrogen Plasma ◽  
Nanoparticle Arrays ◽  
Subsequent Removal ◽  
Gold Precursor ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Fluorescent Molecules ◽  
Made In

ABSTRACTNanometer sized gold patterns were produced with controlled spacings using the combination of a top-down (e-beam lithography) and a bottom-up (macromolecular chemistry) technique. Sub-10 nm nanoparticle arrays on silicon consisting of gold nano particles separated by micro meter spacings were fabricated with this approach. Using electron beam lithography, templates comprising of 150 nm to 1 μm sized trenches, holes and aperiodic patterns were made in an electron-beam resist. Block copolymer micelles were then patterned into this template by spincoating. The micelles acted as positioners for a nanometer sized gold precursor that is sequestered within its core. Subsequent removal of the resist layer left an array of Au loaded organic micelles ordered according to the pattern of the template. Exposure of this substrate to a hydrogen plasma removed the organic block copolymer and resulted in an array of sub-10 nm gold nanoparticles/nanoclusters with micron separations. The gold was then used as an anchor point for the tethering of functional molecules in order to localize fluorescent molecules.

Characterization of bimetallic PdAg nanoparticle arrays by the diblock copolymer micelle approach

2016 ◽  
pp. 167-168
Author(s):  
Eric Ehret ◽  
Emmanuel Beyou ◽  
Grigory V Mamontov ◽  
Tatiana A. Bugrova ◽  
Bruno Domenichini ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Nanoparticle Arrays ◽  
Copolymer Micelle

β-lactam Functionalized Poly(isoprene-b-ethylene oxide) Amphiphilic Block Copolymer Micelles as a New Nanocarrier System for Curcumin

2010 ◽  
Vol 6 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Konstantinos Gardikis ◽  
Konstantinos Dimas ◽  
Aristidis Georgopoulos ◽  
Eleni Kaditi ◽  
Stergios Pispas ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Amphiphilic Block Copolymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Donnan Equilibria in Polymeric Micellar Systems with Weak Polyelectrolyte Shells: The Lowering of the pH Value

1997 ◽  
Vol 62 (11) ◽  
pp. 1730-1736 ◽  
Author(s):  
Petr Munk ◽  
Zdeněk Tuzar ◽  
Karel Procházka
Keyword(s):  
Ionic Strength ◽  
Block Copolymer ◽  
Ph Value ◽  
Electrolyte Solutions ◽  
Hydrogen Ions ◽  
Micellar Systems ◽  
Weak Electrolytes ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Polyelectrolyte Solutions

When two electrolyte solutions are separated and only some of the ions can cross the boundary, the concentrations of these ions are different on both sides of the boundary. This is the well-known Donnan effect. When weak electrolytes are involved, the imbalance includes also hydrogen ions: there is a difference of pH across the boundary and the dissociation of nondiffusible weak electrolytes is suppressed. The effect is very pronounced when the concentration of the weak electrolyte is high and ionic strength is low. The significance of this phenomenon is discussed for polyelectrolyte solutions, and particularly for block copolymer micelles with weak polyelectrolyte shells. The effect is quite dramatic in the latter case.

A Monte Carlo Study of Flexible Polymer Chain Conformations in Restricted Volumes. I. A Model for Insoluble Blocks Conformations in Swollen Cores of Multimolecular Spherical Block Copolymer Micelles

1993 ◽  
Vol 58 (10) ◽  
pp. 2290-2304 ◽  
Author(s):  
Zuzana Limpouchová ◽  
Karel Procházka
Keyword(s):  
Monte Carlo ◽  
Block Copolymer ◽  
Monte Carlo Study ◽  
Volume Effect ◽  
Micellar Systems ◽  
Flexible Polymer ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Chain Conformations ◽  
Chain Lengths

Monte Carlo simulations of chain conformations in a restricted spherical volume at relatively high densities of segments were performed for various numbers of chains, N, and chain lengths (number of segments), L, on a tetrahedral lattice. All chains are randomly end-tethered to the surface of the sphere. A relatively uniform surface density of the tethered ends is guaranteed in our simulations. A simultaneous self-avoiding walk of all chains creates starting conformations for a subsequent equilibration. A modified algorithm similar to that of Siepmann and Frenkel is used for the equilibration of the chain conformations. In this paper, only a geometrical excluded volume effect of segments is considered. Various structural and conformational characteristics, e.g. segment densities gS(r), free end densities gF(r) as functions of the position in the sphere (a distance from the center), distributions of the tethered-to-free end distances, ρTF(rTF), etc. are calculated and their physical meaning is discussed. The model is suitable for studies of chain conformations is swollen cores of multimolecular block copolymer micelles and for interpretation of non-radiative excitation energy migration in polymeric micellar systems.

Study of Sedimentation Velocity of Block Copolymer Micelles

1993 ◽  
Vol 58 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Minmin Tian ◽  
C. Ramireddy ◽  
Stephen E. Webber ◽  
Petr Munk
Keyword(s):  
Block Copolymer ◽  
Methacrylic Acid ◽  
Mixed Solvent ◽  
Hard Spheres ◽  
Sedimentation Velocity ◽  
Hydrodynamic Coefficient ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Size Heterogeneity ◽  
Good Agreement

No anomalies were observed during the measurement of sedimentation coefficients of block copolymer micelles formed by copolymers of styrene and methacrylic acid in a mixed solvent; 80 vol.% of dioxane and 20 vol.% of water. The shapes of the sedimenting boundaries suggest that the size heterogeneity of the micelles is small. Linear relations between 1/s and c were obtained. The value of the hydrodynamic coefficient κ was between 2 and 4 in a good agreement with the value 2.75 or 2.86 that was obtained by combining Burgers' or Fixman's values of the coefficient of the concentration dependence kvs for hard spheres with Einstein's value of [η] for spheres.

Chain Exchange Kinetics of Bottlebrush Block Copolymer Micelles

2021 ◽  
Author(s):  
Seyoung Kim ◽  
Sangho Lee ◽  
Soo-Hyung Choi ◽  
Kookheon Char
Keyword(s):  
Block Copolymer ◽  
Block Copolymer Micelles ◽  
Exchange Kinetics ◽  
Copolymer Micelles ◽  
Kinetics Of
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