Microgel/silica hybrid colloids: Bioinspired synthesis and controlled release application

Agrawal, Garima; Samal, Sangram Keshari; Sethi, Sushanta K.; Manik, Gaurav; Agrawal, Rahul

doi:10.1016/j.polymer.2019.121599

Cited by 49 publications

(24 citation statements)

References 41 publications

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“…[4] These features modifythe nucleationf ree energy barriera nd nucleation kinetics of silica, which ultimately governt he growth into well-defineds tructures. [5][6][7][8][9][10] Building upon the lessons learned from insightful work on biomineralization, numerouss ilica production strategies have used amine-bearing polymers such as poly(ethyleneimine), [11][12][13] polylysine, [14][15][16][17][18][19] peptides, [20][21][22] and block copolymers [23][24][25][26] to obtainh ighlyi ntricate structures. This methodi sa dvantageous because the amine-rich polymers not only serve as as caffold but also act as acatalysttopromote the condensation of silicic acid.…”

Section: Introductionmentioning

confidence: 99%

“…Building upon the lessons learned from insightful work on biomineralization, numerous silica production strategies have used amine‐bearing polymers such as poly(ethyleneimine), [11–13] polylysine, [14–19] peptides, [20–22] and block copolymers [23–26] to obtain highly intricate structures. This method is advantageous because the amine‐rich polymers not only serve as a scaffold but also act as a catalyst to promote the condensation of silicic acid.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bioinspired Scaffolding by Supramolecular Amines Allows the Formation of One‐ and Two‐Dimensional Silica Superstructures

Magana

Gumí-Audenis

Tas

et al. 2020

Chemistry A European J

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Silica materials attract an increasing amount of interest in (fundamental) research, and find applications in, for example, sensing, catalysis, and drug delivery.A st he properties of these (nano)materials not only depend on their chemistry but also their size, shape,a nd surface area, the controllable synthesis of silica is essential for tailoringt he materials to specific applications. Advantageously,b ioinspired routes for silica production are environmentally friendly ands traightforward since the formation process is spontaneousa nd proceeds under mild conditions. These strategies mostly employ amine-bearing phosphorylated (bio)polymers. In this work, we expand this principle to supramolecular polymers based on the water-soluble cationic cyanine dye Pinacyanol acetate. Upon assembly in water, these dye molecules form large, polyaminated, supramolecular fibers.T he surfaces of these fibers can be used as ascaffold for the condensation of silicic acid. Controlo ver the ionic strength, dye concentration, and silicic acid saturation yielded silica fibers with ad iameter of 25 nm and as ingle, 4nmp ore. Unexpectedly,o ther unusual superstructures, namely,n ummulites and spherulites, are also observed depending on the ionic strength and dye concentration.T ransmission and scanning electronm icroscopy (TEM and SEM) showedt hat these superstructures are formed by aligned silica fibers. Close examination of the dye scaffold prior silicification using small-angle X-ray scattering (SAXS), and UV/Vis spectroscopy revealed minor influence of the ionic strength and dye concentration on the morphologyo ft he supramolecular scaffold.T otal internal reflection fluorescence (TIRF) during silicification unraveledt hat if the reaction is kept under static conditions, only silica fibers are obtained. Experiments performed on the dye scaffold and silica superstructures evidenced that the marked structurald iversity originates from the arrangemento fs ilica/dye fibers. Under these mild conditions, external force fields can profoundly influence the morphologyo ft he produced silica.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bioinspired Scaffolding by Supramolecular Amines Allows the Formation of One‐ and Two‐Dimensional Silica Superstructures

Magana

Gumí-Audenis

Tas

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…MD simulations have long been served as a fundamental tool to gain understanding in different sectors of research, such as estimation of interaction energy among various polymers/fillers [70][71][72][73] , the surface energy of polymers/metals [74] , interfacial shear strength [75] , and wetting characteristics [76] , etc. computational scientists use different water models such as SPCE, SPC, TIP3P, and TIP4P [77] , etc.…”

Section: Application Of Molecular Dynamics (Md) Simulation In Sh Coat...mentioning

confidence: 99%

Recent Progress in Superhydrophobic Coatings Using Molecular Dynamics Simulations and Experimental Techniques

Sethi

2022

non-met. mater. sci.

Self Cite

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Superhydrophobic (SH) coatings are intended to resist a surface from corrosion and thereby increases the product life duration. It is also a promisingsolution to save cleaning costs and time by providing self-clean nature tothe surface. This review article provides the most recent updates in designing SH surfaces and their characterizations adopted both in experimentaland computational techniques. To gain a comprehensive perspective, theSH surfaces present in nature those are inspiring human beings to mimicsuch surfaces are introduced at the beginning of this article. Subsequently,different fabrication techniques undertaken recently to design artificial SHsurfaces are briefly discussed. Recent progress in computations employedin the development of SH surfaces is then discussed. Next, the limitationsin SH surfaces are addressed. Finally, perceptiveness of different strategiesand their limitations are presented in the concluding remarks and outlook.Overall, this mini review article brings together and highlights thesignificant advancements in fabrication of superhydrophobic surfaceswhich may surely help the early-stage researchers/scientists to plan theirwork accordingly.

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“…Besides water-soluble aminated species, colloidal systems bearing amine moieties have found usage for silica synthesis, examples including micelles, , latex particles, , and microgels (MGs). − The use of MGs as a template for silica formation is particularly easy for large-scale synthesis, easy to control the size, and relatively convenient to functionalize. Unlike the smooth surface obtained by using the traditional Stöber method or micelles as templates to synthesize hybrid particles, swollen MGs promote the formation of rough surfaces by hybrid particles due to their porous properties.…”

Section: Introductionmentioning

confidence: 99%

Silicification of Amine-Epoxide Cationic Microgels: An In Vitro Investigation

Sun

Cheng

2021

Langmuir

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Herein, the applicability of an unconventional, non-vinylic type of amine-epoxide microgels (MGs) to promote silica deposition from tetraethyl orthosilicate (TEOS) was investigated. Simply mixing MGs with TEOS in water at 25 °C resulted in the formation of hybrid silica-MG particles (sMGs) as a function of silicification time. The sMGs were cationic with thermal-sensitive swelling capability. Extending silicification time to 24 h was shown to increase silica content to 43%. Besides, the sMGs became structurally more rigid to resist drying-induced deformation and exhibited a rugged surface texture. Mechanistically, the aminated nature of the MGs was proved beneficial for the success of their silicification, fulfilling dual functions of the catalyst for TEOS hydrolysis and template for silica deposition. Through electrostatic adsorption, the sMGs provided a facile yet robust option for surface modifications toward bone-related applications. Surface-induced mineralization in simulated biological fluids was observed with sMG-immobilized surfaces, where the presence of hydroxyapatite was characterized in the deposited apatite. In vitro MC3T3-E1 pre-osteoblast cell studies showed that cell adhesion, morphology, and proliferation could be influenced by both sMG types and their adsorption density. Of particular interest is the finding of cells exhibiting elongated and greatly polarized morphology on the surface with high adsorption density of sMGs of 43% silica. It was postulated that the rugged appearance of such sMGs could have presented a hierarchically structured surface toward cells, an interesting aspect to be further exploited for the engineering of cell−surface interactions.

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Microgel/silica hybrid colloids: Bioinspired synthesis and controlled release application

Cited by 49 publications

References 41 publications

Bioinspired Scaffolding by Supramolecular Amines Allows the Formation of One‐ and Two‐Dimensional Silica Superstructures

Bioinspired Scaffolding by Supramolecular Amines Allows the Formation of One‐ and Two‐Dimensional Silica Superstructures

Recent Progress in Superhydrophobic Coatings Using Molecular Dynamics Simulations and Experimental Techniques

Silicification of Amine-Epoxide Cationic Microgels: An In Vitro Investigation

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