Mechanics of artificial microcapsules

Fery, Andreas; Dubreuil, Frédéric; Möhwald, Helmuth

doi:10.1088/1367-2630/6/1/018

Cited by 157 publications

(171 citation statements)

References 50 publications

(48 reference statements)

Supporting

Mentioning

160

Contrasting

Unclassified

Order By: Relevance

“…Since the first report by Möhwald and co-workers in 1998, [30] the fabrication of LbL microcapsules has become one of the hottest areas in this field with many review articles published quite recently. LbL assembly, [33] nanocapsules, [34] nanoreactors, [7] responsive films and capsules, [35] microcapsules, [36] the mechanical properties of the microcapsules, [37,38] and the permeability of these capsules [39,40] have all been recently reviewed. Thus, in this article, we only briefly discuss these structures (type c in Fig.…”

Section: Freestanding Lbl Structuresmentioning

confidence: 99%

“…[35,[73][74][75][76][77] Considering that several recent reviews have already discussed the fabrication, properties, and permeability of LbL microcapsules in great detail, here we restrict ourselves to reviewing some very recent results. [37][38][39][78][79][80] The micromechanical properties of LbL microcapsules filled with polyelectrolyte solutions have been investigated by Vinogradova and co-workers. [81] In addition, Caruso and co-workers [82] and Skirtach et al [83] have recently discovered the light-responsive permeability of microcapsules with gold nanoparticles encapsulated in the microcapsule walls.…”

Section: Lbl Films At the Liquid/liquid Interfacementioning

confidence: 99%

See 1 more Smart Citation

Freestanding Nanostructures via Layer‐by‐Layer Assembly

2006

View full text Add to dashboard Cite

Freestanding flexible nanocomposite structures fabricated by layer‐by‐layer (LbL) assembly are promising candidates for many potential applications, such as in the fields of thermomechanical sensing, controlled release, optical detection, and drug delivery. In this article, we review recent advances in the fabrication and characterization of different types of freestanding LbL structures in air and at air/liquid and liquid/liquid interfaces, including micro‐ and nanocapsules, microcantilevers, freely suspended membranes, encapsulated nanoparticle arrays, and sealed‐cavity arrays. Several recently developed fabrication techniques, such as spin‐assisted coating, dipping, and micropatterning, make the assembly process more efficient and impart novel physical properties to the freestanding films.

show abstract

Section: Freestanding Lbl Structuresmentioning

confidence: 99%

Section: Lbl Films At the Liquid/liquid Interfacementioning

confidence: 99%

Freestanding Nanostructures via Layer‐by‐Layer Assembly

2006

View full text Add to dashboard Cite

show abstract

“…For LBL microcapsules, the elasticity of the shell is of the order of 0.1-1 Gpa, and these elastic properties are found to be independent of the speed of deformation (Dubreuil et al 2003;Elsner et al 2004;Fery et al 2004). (We note that the Young modulus of the membrane can be tailored by varying the salt concentration in the solution or the solvent temperature.)…”

Section: Resultsmentioning

confidence: 92%

Healing substrates with mobile, particle-filled microcapsules: designing a ‘repair and go’ system

Verberg

Dale

Kumar

et al. 2006

J. R. Soc. Interface.

View full text Add to dashboard Cite

We model the rolling motion of a fluid-driven, particle-filled microcapsule along a heterogeneous, adhesive substrate to determine how the release of the encapsulated nanoparticles can be harnessed to repair damage on the underlying surface. We integrate the lattice Boltzmann model for hydrodynamics and the lattice spring model for the micromechanics of elastic solids to capture the interactions between the elastic shell of the microcapsule and the surrounding fluids. A Brownian dynamics model is used to simulate the release of nanoparticles from the capsule and their diffusion into the surrounding solution. We focus on a substrate that contains a damaged region (e.g. a crack or eroded surface coating), which prevents the otherwise mobile capsule from rolling along the surface. We isolate conditions where nanoparticles released from the arrested capsule can repair the damage and thereby enable the capsules to again move along the substrate. Through these studies, we establish guidelines for designing particle-filled microcapsules that perform a 'repair and go' function and thus, can be utilized to repair damage in microchannels and microfluidic devices.

show abstract

“…MIC are a special form of packing, where a material of reduced size is covered in an individual way; in the microencapsulation term are included MIC, micro particles, nanocapsules and bioactive substances trapped or soaked in a polymeric matrix (Rochmadi et al, 2010). Formulations with encapsulated bacteria for agricultural uses have at least two objectives: (a) to protect in a temporal way, encapsulated microorganisms against adverse soil a biotic factors (Mirzakhani et al, 2009;Ghaly et al, 2007) and b) progressively to release the trapped microorganisms in a way that efficiently colonizes crop roots (Fery et al, 2004;Yoon and Kinam, 2004). Based on the need of having biological options for prevention and control of plant diseases, the present study was carried out under laboratory and greenhouse conditions with the following objectives: (a) to design an evaluate the efficiency of an equipment for microencapsulation, (b) to analyze the antagonistic effect against R. solani and F. oxysporum of MIC containing three B. subtilis strains and a mixture of them.…”

Section: Introductionmentioning

confidence: 99%

Biocontrol of Soil Fungi in Tomato with Microencapsulates Containing <i>Bacillus subtilis</i>

Suárez¹

2011

American Journal of Agricultural and Biological Sciences

View full text Add to dashboard Cite

Problem statement: An option to reduce pollution by synthetic agro-chemical in root plant disease management is the use of antagonist rhizobacteria belonging to Bacillus genus, because their inhibitory properties, stimulation of plant growth and crop yield increase. Approach: This study was carried out in order to evaluate if Bacillus subtilis strains could play an antagonists role of plant pathogens and if they can be microencapsulated inside a biopolymer matrix. It was adapted an equipment and evaluated a technique for microcapsules elaboration, in order to incorporate B. subtilis strains and to analyze their potential as biocontrol agents by determining their antagonistic effect against pathogenic soil fungi; in addition, it was analyzed their effect on tomato plant growth promotion under greenhouse conditions. B. subtilis strains identified as B1, J1, M2 and their mixture were used; microcapsules containing bacterial strains were inoculated to tomato seeds cv. Floradade. When seedlings emerged, a second application of microcapsules containing B. subtilis was performed on the pots, which previously were inoculated with the fungi Rhizoctonia solani and Fusarium oxysporum. Response variables were: Incidence and disease severity, plant growth, aerial and root dry weight, leaf area and fruit yield. Results: The outcome showed that the equipment designed and adapted for microcapsules elaboration was useful to obtain microcapsules containing the bacterial strains. B. subtilis strains exerted apparent biocontrol, since incidence and disease severity was reduced and for that reason inhibited the infective activity of the inoculated plant pathogens, also microcapsules containing Bacillus strains stimulated tomato growth and fruit yield. Conclusion: Microcapsules containing B. subtilis strains could be effective biocontrol agents against soil fungi plant pathogens and could have a potential biofertilizer effect, since they stimulated growth and yield of tomato plants compared to control.

show abstract

Mechanics of artificial microcapsules

Cited by 157 publications

References 50 publications

Freestanding Nanostructures via Layer‐by‐Layer Assembly

Freestanding Nanostructures via Layer‐by‐Layer Assembly

Healing substrates with mobile, particle-filled microcapsules: designing a ‘repair and go’ system

Biocontrol of Soil Fungi in Tomato with Microencapsulates Containing <i>Bacillus subtilis</i>

Contact Info

Product

Resources

About