Photolysis triggered sealing of multilayer capsules to entrap small molecules

Qiangying Yi, Gleb B. Sukhorukov

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Novel microcapsule systems containing UV-responsive diazonium groups were fabricated as microcontainers for cargo substance encapsulation by using a layer-by-layer (LbL) assembly technique. Upon direct exposure to UV light with a wavelength of approximately 380 nm, the diazonium groups of diazoresion (DAR) rapidly reacted with sulfonate or diazo-sulfonate groups of counterpart polyelectrolytes, which converted electrostatic interactions to covalent bonds, demonstrating an effective in situ cross-linking within multilayers via photolysis. Such chemical transition eliminated the paired ionic groups, therefore generating more hydrophobic multilayer shells, offering a unique approach to seal the porous polyelectrolyte capsule shells. Fluorescent molecule rhodamine B (RhB) was consequently studied as a typical example for small molecule encapsulation. Results indicated that the dye was remarkably retained within the microcapsules after UV-triggered capsule shell sealing.

Original languageEnglish
Pages (from-to)6723-6731
Number of pages9
JournalACS Applied Materials and Interfaces
Volume5
Issue number14
DOIs
Publication statusPublished - 24 Jul 2013
Externally publishedYes

Fingerprint

Photolysis
Polyelectrolytes
Encapsulation
Capsules
Multilayers
rhodamine B
Molecules
Covalent bonds
Coulomb interactions
Ultraviolet radiation
Seals
Dyes
Wavelength
Coloring Agents

Keywords

  • capsule
  • diazonium
  • encapsulation
  • layer-by-layer
  • photolysis

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Photolysis triggered sealing of multilayer capsules to entrap small molecules. / Yi, Qiangying; Sukhorukov, Gleb B.

In: ACS Applied Materials and Interfaces, Vol. 5, No. 14, 24.07.2013, p. 6723-6731.

Research output: Contribution to journalArticle

@article{41fc35e418df47e4a95bf41fca174ff8,
title = "Photolysis triggered sealing of multilayer capsules to entrap small molecules",
abstract = "Novel microcapsule systems containing UV-responsive diazonium groups were fabricated as microcontainers for cargo substance encapsulation by using a layer-by-layer (LbL) assembly technique. Upon direct exposure to UV light with a wavelength of approximately 380 nm, the diazonium groups of diazoresion (DAR) rapidly reacted with sulfonate or diazo-sulfonate groups of counterpart polyelectrolytes, which converted electrostatic interactions to covalent bonds, demonstrating an effective in situ cross-linking within multilayers via photolysis. Such chemical transition eliminated the paired ionic groups, therefore generating more hydrophobic multilayer shells, offering a unique approach to seal the porous polyelectrolyte capsule shells. Fluorescent molecule rhodamine B (RhB) was consequently studied as a typical example for small molecule encapsulation. Results indicated that the dye was remarkably retained within the microcapsules after UV-triggered capsule shell sealing.",
keywords = "capsule, diazonium, encapsulation, layer-by-layer, photolysis",
author = "Qiangying Yi and Sukhorukov, {Gleb B.}",
year = "2013",
month = "7",
day = "24",
doi = "10.1021/am4016389",
language = "English",
volume = "5",
pages = "6723--6731",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "14",

}

TY - JOUR

T1 - Photolysis triggered sealing of multilayer capsules to entrap small molecules

AU - Yi, Qiangying

AU - Sukhorukov, Gleb B.

PY - 2013/7/24

Y1 - 2013/7/24

N2 - Novel microcapsule systems containing UV-responsive diazonium groups were fabricated as microcontainers for cargo substance encapsulation by using a layer-by-layer (LbL) assembly technique. Upon direct exposure to UV light with a wavelength of approximately 380 nm, the diazonium groups of diazoresion (DAR) rapidly reacted with sulfonate or diazo-sulfonate groups of counterpart polyelectrolytes, which converted electrostatic interactions to covalent bonds, demonstrating an effective in situ cross-linking within multilayers via photolysis. Such chemical transition eliminated the paired ionic groups, therefore generating more hydrophobic multilayer shells, offering a unique approach to seal the porous polyelectrolyte capsule shells. Fluorescent molecule rhodamine B (RhB) was consequently studied as a typical example for small molecule encapsulation. Results indicated that the dye was remarkably retained within the microcapsules after UV-triggered capsule shell sealing.

AB - Novel microcapsule systems containing UV-responsive diazonium groups were fabricated as microcontainers for cargo substance encapsulation by using a layer-by-layer (LbL) assembly technique. Upon direct exposure to UV light with a wavelength of approximately 380 nm, the diazonium groups of diazoresion (DAR) rapidly reacted with sulfonate or diazo-sulfonate groups of counterpart polyelectrolytes, which converted electrostatic interactions to covalent bonds, demonstrating an effective in situ cross-linking within multilayers via photolysis. Such chemical transition eliminated the paired ionic groups, therefore generating more hydrophobic multilayer shells, offering a unique approach to seal the porous polyelectrolyte capsule shells. Fluorescent molecule rhodamine B (RhB) was consequently studied as a typical example for small molecule encapsulation. Results indicated that the dye was remarkably retained within the microcapsules after UV-triggered capsule shell sealing.

KW - capsule

KW - diazonium

KW - encapsulation

KW - layer-by-layer

KW - photolysis

UR - http://www.scopus.com/inward/record.url?scp=84880774433&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880774433&partnerID=8YFLogxK

U2 - 10.1021/am4016389

DO - 10.1021/am4016389

M3 - Article

AN - SCOPUS:84880774433

VL - 5

SP - 6723

EP - 6731

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 14

ER -