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 language | English |
|---|---|
| Pages (from-to) | 6723-6731 |
| Number of pages | 9 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 5 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 24 Jul 2013 |
| Externally published | Yes |
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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 journal › Article
}
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 -