Self‐Assembly, Optical Behavior, and Permeability of a Novel Capsule Based on an Azo Dye and Polyelectrolytes

Tao, Xia; Li, Junbai; Möhwald, Helmuth

doi:10.1002/chem.200400024

Cited by 99 publications

(68 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3,17 Besides tuning the permeability of the capsule shell by variations in shell thickness, the capsule surface can also be functionalized by e.g. poly(ethylene glycol), 18 lipids, 19 antibodies, 20 dyes 21 and nanoparticles. 22,23 Two strategies have been envisaged for the encapsulation of substances in LbL capsules.…”

Section: Introductionmentioning

confidence: 99%

Encapsulation Performance of Layer-by-Layer Microcapsules for Proteins

et al. 2011

View full text Add to dashboard Cite

This study reports on the encapsulation efficiency of proteins in dextran sulfate / poly-L-arginine based microcapsules, fabricated via Layer-by-Layer assembly (LbL). For this purpose, radiolabeled proteins are entrapped in CaCO3 microparticles followed by LbL coating of the CaCO3 cores and subsequent dissolving of the CaCO3 using EDTA. To allow to improve protein encapsulation in LbL microcapsules, we studied all steps in the preparation of the microcapsules where loss of protein load might occur. The encapsulation efficiency of proteins in LbL microcapsules turns out to be strongly dependent on both the charge and molecular weight of the protein as well as on the number of polyelectrolyte bilayers the microcapsules consist of.2

show abstract

Section: Introductionmentioning

confidence: 99%

Encapsulation Performance of Layer-by-Layer Microcapsules for Proteins

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Some dyes that have multiple charges have been deposited with polyelectrolytes that have opposite charges. [7][8][9][10] It has been recognized that using small molecules in LBL films has great advantages. For example, it is easy to procure the material of LBL films, and various functions of small molecules can be used in LBL films.…”

Section: Introductionmentioning

confidence: 99%

Multilayered Assemblies Composed of Brilliant Yellow and Poly(allylamine) for an Optical pH Sensor

2006

View full text Add to dashboard Cite

Multilayered thin films containing poly(allylamine) (PAA) and brilliant yellow (BY) were prepared on a quartz slide by a layer-by-layer (LBL) deposition technique. The UV-visible spectra of the PAA/BY films were sufficiently changed depending upon the pH value of the solution in which the film was immersed. The response of the PAA/BY films was very fast (within a second) upon pH change from 9.0 to 5.0, while the response time was ca. 100 s upon pH change from 5.0 to 9.0.

show abstract

“…A similar enhancement in the surface roughness of the microshells caused by the photochemical reaction was also observed by assembling a Congo red dye onto the surface of the polyelectrolyte shells and inducing a photoreaction by applying visible radiation. [18] Recycled accumulation and degradation: Because the (ALG/CHI) shells can be easily recovered by filtration, we carried out two consecutive photodegradations of RhB with the (ALG/CHI) shells as the microcontainers. The (ALG/ CHI) shells were reutilized repetitively after the color attributed to the RhB in the shell interior disappeared completely.…”

Section: Degradation Of Dyesmentioning

confidence: 99%

Photooxidative Degradation of Dye Pollutants Accumulated in Self‐Assembled Natural Polyelectrolyte Microshells under Visible Radiation

Tao¹,

Su²,

Chen³

2006

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

A novel route to facilitate the degradation of dye pollutants, a class of well-known recalcitrant organic pollutants, is reported. This new approach is based on a natural polyelectrolyte microshell that was preformed by the alternate adsorption of the anionic alginate sodium (ALG) and the cationic chitosan (CHI) onto weakly cross-linked melamine formaldehyde (MF) colloidal particles, and the subsequent sacrifice of MF templates in 0.1 M HCl. The as-prepared microshells could accumulate rhodamine B (RhB) and fluorescein (Flu) efficiently in water under ordinary conditions by means of a simple mixing process. The photodegradation of the accumulated RhB and Flu was examined in the presence of Fe3+ and H2O2 under visible radiation. The accumulated RhB and Flu are rapidly degraded and the assembled shells maintain their intact spherical shape throughout the photoreaction process. Results of recycling degradation experiments and the photochemical behavior of the shells, as demonstrated by confocal laser scanning microscopy (CLSM), UV-visible spectroscopy, and scanning force microscopy (SFM), further suggest that the constructed shells may be used as environmentally friendly microcontainers for the elimination of dyes in wastewater.

show abstract

Self‐Assembly, Optical Behavior, and Permeability of a Novel Capsule Based on an Azo Dye and Polyelectrolytes

Cited by 99 publications

References 41 publications

Encapsulation Performance of Layer-by-Layer Microcapsules for Proteins

Encapsulation Performance of Layer-by-Layer Microcapsules for Proteins

Multilayered Assemblies Composed of Brilliant Yellow and Poly(allylamine) for an Optical pH Sensor

Photooxidative Degradation of Dye Pollutants Accumulated in Self‐Assembled Natural Polyelectrolyte Microshells under Visible Radiation

Contact Info

Product

Resources

About