Self-assembly of doublets from flattened polymer colloids

Laura Mely Ramírez, Adrian S. Smith, Deniz B. Unal, Ralph H. Colby, Darrell Velegol

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Bottom-up fabrication methods are used to assemble strong yet flexible colloidal doublets. Part of a spherical particle is flattened, increasing the effective interaction area with another particle having a flat region. In the presence of a moderate ionic strength, the flat region on one particle will preferentially "bond" to a flat region on another particle in a deep (≥10 kT) secondary energy minimum. No external field is applied during the assembly process. Under the right conditions, the flat-flat bonding strength is ≥10 × that of a sphere-sphere interaction. Not only can flat-flat bonds be quite strong, but they are expected to remain freely rotatable and flexible, with negligible energy barriers for rotation because particles reside in a deep secondary energy minimum with a ∼20-30 nm layer of fluid between the ∼1 μm radius particles. We present a controlled technique to flatten the particles at room temperature, the modeling of the interparticle forces for flattened spheres, and the experimental data for the self-assembly of flat-flat doublets.

Original languageEnglish (US)
Pages (from-to)4086-4094
Number of pages9
JournalLangmuir
Volume28
Issue number9
DOIs
StatePublished - Mar 6 2012

Fingerprint

Colloids
Self assembly
colloids
self assembly
Polymers
polymers
Energy barriers
Ionic strength
Fabrication
Fluids
energy
assembly
Temperature
interactions
fabrication
radii
fluids
room temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Ramírez, Laura Mely ; Smith, Adrian S. ; Unal, Deniz B. ; Colby, Ralph H. ; Velegol, Darrell. / Self-assembly of doublets from flattened polymer colloids. In: Langmuir. 2012 ; Vol. 28, No. 9. pp. 4086-4094.
@article{0a7e488d4ef44490923942c7b47cc53b,
title = "Self-assembly of doublets from flattened polymer colloids",
abstract = "Bottom-up fabrication methods are used to assemble strong yet flexible colloidal doublets. Part of a spherical particle is flattened, increasing the effective interaction area with another particle having a flat region. In the presence of a moderate ionic strength, the flat region on one particle will preferentially {"}bond{"} to a flat region on another particle in a deep (≥10 kT) secondary energy minimum. No external field is applied during the assembly process. Under the right conditions, the flat-flat bonding strength is ≥10 × that of a sphere-sphere interaction. Not only can flat-flat bonds be quite strong, but they are expected to remain freely rotatable and flexible, with negligible energy barriers for rotation because particles reside in a deep secondary energy minimum with a ∼20-30 nm layer of fluid between the ∼1 μm radius particles. We present a controlled technique to flatten the particles at room temperature, the modeling of the interparticle forces for flattened spheres, and the experimental data for the self-assembly of flat-flat doublets.",
author = "Ram{\'i}rez, {Laura Mely} and Smith, {Adrian S.} and Unal, {Deniz B.} and Colby, {Ralph H.} and Darrell Velegol",
year = "2012",
month = "3",
day = "6",
doi = "10.1021/la204584z",
language = "English (US)",
volume = "28",
pages = "4086--4094",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "9",

}

Self-assembly of doublets from flattened polymer colloids. / Ramírez, Laura Mely; Smith, Adrian S.; Unal, Deniz B.; Colby, Ralph H.; Velegol, Darrell.

In: Langmuir, Vol. 28, No. 9, 06.03.2012, p. 4086-4094.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Self-assembly of doublets from flattened polymer colloids

AU - Ramírez, Laura Mely

AU - Smith, Adrian S.

AU - Unal, Deniz B.

AU - Colby, Ralph H.

AU - Velegol, Darrell

PY - 2012/3/6

Y1 - 2012/3/6

N2 - Bottom-up fabrication methods are used to assemble strong yet flexible colloidal doublets. Part of a spherical particle is flattened, increasing the effective interaction area with another particle having a flat region. In the presence of a moderate ionic strength, the flat region on one particle will preferentially "bond" to a flat region on another particle in a deep (≥10 kT) secondary energy minimum. No external field is applied during the assembly process. Under the right conditions, the flat-flat bonding strength is ≥10 × that of a sphere-sphere interaction. Not only can flat-flat bonds be quite strong, but they are expected to remain freely rotatable and flexible, with negligible energy barriers for rotation because particles reside in a deep secondary energy minimum with a ∼20-30 nm layer of fluid between the ∼1 μm radius particles. We present a controlled technique to flatten the particles at room temperature, the modeling of the interparticle forces for flattened spheres, and the experimental data for the self-assembly of flat-flat doublets.

AB - Bottom-up fabrication methods are used to assemble strong yet flexible colloidal doublets. Part of a spherical particle is flattened, increasing the effective interaction area with another particle having a flat region. In the presence of a moderate ionic strength, the flat region on one particle will preferentially "bond" to a flat region on another particle in a deep (≥10 kT) secondary energy minimum. No external field is applied during the assembly process. Under the right conditions, the flat-flat bonding strength is ≥10 × that of a sphere-sphere interaction. Not only can flat-flat bonds be quite strong, but they are expected to remain freely rotatable and flexible, with negligible energy barriers for rotation because particles reside in a deep secondary energy minimum with a ∼20-30 nm layer of fluid between the ∼1 μm radius particles. We present a controlled technique to flatten the particles at room temperature, the modeling of the interparticle forces for flattened spheres, and the experimental data for the self-assembly of flat-flat doublets.

UR - http://www.scopus.com/inward/record.url?scp=84863248007&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863248007&partnerID=8YFLogxK

U2 - 10.1021/la204584z

DO - 10.1021/la204584z

M3 - Article

C2 - 22296510

AN - SCOPUS:84863248007

VL - 28

SP - 4086

EP - 4094

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 9

ER -