Self-assembly of model short triblock amphiphiles in dilute solution

G. Zaldivar, M. B. Samad, Martin Conda Sheridan, M. Tagliazucchi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this work, a molecular theory is used to study the self-assembly of short diblock and triblock amphiphiles, with head-tail and head-linker-tail structures, respectively. The theory was used to systematically explore the effects of the molecular architecture and the affinity of the solvent for the linker and tail blocks on the relative stability of the different nanostructures formed by the amphiphiles in dilute solution, which include spherical micelles, cylindrical fibers and planar lamellas. Moreover, the theory predicts that each of these nanostructures can adopt two different types of internal organization: (i) normal nanostructures with a core composed of tail segments and a corona composed of head segments, and (ii) nanostructures with a core formed by linker segments and a corona formed by tail and head segments. The theory predicts the occurrence of a transition from micelle to fiber to lamella when increasing the length of the tail or the linker blocks, which is in qualitative agreement with the geometric packing theory and with experiments in the literature. The theory also predicts a transition from micelle to fiber to lamella as the affinity of the solvent for the tail or linker block is decreased. This result is also in qualitative agreement with experiments in the literature but cannot be explained in terms of the geometric packing theory. The molecular theory provides an explanation for this result in terms of the competition between solvophobic attractions among segments in the core and steric repulsions between segments in the corona for the different types of self-assembled nanostructures.

Original languageEnglish (US)
Pages (from-to)3171-3181
Number of pages11
JournalSoft Matter
Volume14
Issue number16
DOIs
StatePublished - Jan 1 2018

Fingerprint

Amphiphiles
Self assembly
self assembly
Nanostructures
Micelles
lamella
coronas
molecular theory
micelles
Fibers
fibers
affinity
Experiments
attraction
occurrences

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Self-assembly of model short triblock amphiphiles in dilute solution. / Zaldivar, G.; Samad, M. B.; Conda Sheridan, Martin; Tagliazucchi, M.

In: Soft Matter, Vol. 14, No. 16, 01.01.2018, p. 3171-3181.

Research output: Contribution to journalArticle

Zaldivar, G. ; Samad, M. B. ; Conda Sheridan, Martin ; Tagliazucchi, M. / Self-assembly of model short triblock amphiphiles in dilute solution. In: Soft Matter. 2018 ; Vol. 14, No. 16. pp. 3171-3181.
@article{134c2405820440cb8a35529f801c20e5,
title = "Self-assembly of model short triblock amphiphiles in dilute solution",
abstract = "In this work, a molecular theory is used to study the self-assembly of short diblock and triblock amphiphiles, with head-tail and head-linker-tail structures, respectively. The theory was used to systematically explore the effects of the molecular architecture and the affinity of the solvent for the linker and tail blocks on the relative stability of the different nanostructures formed by the amphiphiles in dilute solution, which include spherical micelles, cylindrical fibers and planar lamellas. Moreover, the theory predicts that each of these nanostructures can adopt two different types of internal organization: (i) normal nanostructures with a core composed of tail segments and a corona composed of head segments, and (ii) nanostructures with a core formed by linker segments and a corona formed by tail and head segments. The theory predicts the occurrence of a transition from micelle to fiber to lamella when increasing the length of the tail or the linker blocks, which is in qualitative agreement with the geometric packing theory and with experiments in the literature. The theory also predicts a transition from micelle to fiber to lamella as the affinity of the solvent for the tail or linker block is decreased. This result is also in qualitative agreement with experiments in the literature but cannot be explained in terms of the geometric packing theory. The molecular theory provides an explanation for this result in terms of the competition between solvophobic attractions among segments in the core and steric repulsions between segments in the corona for the different types of self-assembled nanostructures.",
author = "G. Zaldivar and Samad, {M. B.} and {Conda Sheridan}, Martin and M. Tagliazucchi",
year = "2018",
month = "1",
day = "1",
doi = "10.1039/c8sm00096d",
language = "English (US)",
volume = "14",
pages = "3171--3181",
journal = "Soft Matter",
issn = "1744-683X",
publisher = "Royal Society of Chemistry",
number = "16",

}

TY - JOUR

T1 - Self-assembly of model short triblock amphiphiles in dilute solution

AU - Zaldivar, G.

AU - Samad, M. B.

AU - Conda Sheridan, Martin

AU - Tagliazucchi, M.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - In this work, a molecular theory is used to study the self-assembly of short diblock and triblock amphiphiles, with head-tail and head-linker-tail structures, respectively. The theory was used to systematically explore the effects of the molecular architecture and the affinity of the solvent for the linker and tail blocks on the relative stability of the different nanostructures formed by the amphiphiles in dilute solution, which include spherical micelles, cylindrical fibers and planar lamellas. Moreover, the theory predicts that each of these nanostructures can adopt two different types of internal organization: (i) normal nanostructures with a core composed of tail segments and a corona composed of head segments, and (ii) nanostructures with a core formed by linker segments and a corona formed by tail and head segments. The theory predicts the occurrence of a transition from micelle to fiber to lamella when increasing the length of the tail or the linker blocks, which is in qualitative agreement with the geometric packing theory and with experiments in the literature. The theory also predicts a transition from micelle to fiber to lamella as the affinity of the solvent for the tail or linker block is decreased. This result is also in qualitative agreement with experiments in the literature but cannot be explained in terms of the geometric packing theory. The molecular theory provides an explanation for this result in terms of the competition between solvophobic attractions among segments in the core and steric repulsions between segments in the corona for the different types of self-assembled nanostructures.

AB - In this work, a molecular theory is used to study the self-assembly of short diblock and triblock amphiphiles, with head-tail and head-linker-tail structures, respectively. The theory was used to systematically explore the effects of the molecular architecture and the affinity of the solvent for the linker and tail blocks on the relative stability of the different nanostructures formed by the amphiphiles in dilute solution, which include spherical micelles, cylindrical fibers and planar lamellas. Moreover, the theory predicts that each of these nanostructures can adopt two different types of internal organization: (i) normal nanostructures with a core composed of tail segments and a corona composed of head segments, and (ii) nanostructures with a core formed by linker segments and a corona formed by tail and head segments. The theory predicts the occurrence of a transition from micelle to fiber to lamella when increasing the length of the tail or the linker blocks, which is in qualitative agreement with the geometric packing theory and with experiments in the literature. The theory also predicts a transition from micelle to fiber to lamella as the affinity of the solvent for the tail or linker block is decreased. This result is also in qualitative agreement with experiments in the literature but cannot be explained in terms of the geometric packing theory. The molecular theory provides an explanation for this result in terms of the competition between solvophobic attractions among segments in the core and steric repulsions between segments in the corona for the different types of self-assembled nanostructures.

UR - http://www.scopus.com/inward/record.url?scp=85046024692&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046024692&partnerID=8YFLogxK

U2 - 10.1039/c8sm00096d

DO - 10.1039/c8sm00096d

M3 - Article

VL - 14

SP - 3171

EP - 3181

JO - Soft Matter

JF - Soft Matter

SN - 1744-683X

IS - 16

ER -