In situ template synthesis of gold nanoparticles using a bis-imidazolium amphiphile-based hydrogel

Rodrigues, Mafalda; Genç, Aziz; Arbiol, Jordi; Amabilino, David B.; Pérez-García, Lluïsa

doi:10.1016/j.jcis.2015.01.026

Cited by 10 publications

(9 citation statements)

References 38 publications

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“…39,40,41,42,43,44 Many of these metallogels have been used as matrices for the in situ formation of metal nanoparticles, mainly silver 45,46,47,48,49 and gold nanoparticles. 50,51,52,53,54,55,56,57,58,59 In this study, both C 12 -Cyc and click-C 12 -Cyc yielded precipitates in the absence of metal ions in polar aprotic solvents such DMSO. However, stable opaque metallogels were obtained in these solvents via a heating-cooling cycle upon incorporation of some metals.…”

Section: Formation Of Metallogelsmentioning

confidence: 59%

“…It is worth mentioning that other metallogels have also been used for the synthesis of NPs in both apolar organic solvents 51 and in water. 54,57,58 Finally, in order to gain information about the size distribution of the formed nanoparticles, we carried out UV-vis studies of the NPs-containing gels and electron microscopy imaging of the corresponding xerogels. The plasmon resonance band centered at ca.…”

Section: Formation Of Gold Nanoparticles-containing Gelsmentioning

confidence: 99%

“…5 nm with icosahedral geometry have been reported using bis-imidazolium amphiphile-based hydrogels. 58 In many cases, NaBH 4 is used as reducing agent, while we used Et 3 N that can be 65 easily removed by evaporation during the preparation of the xerogels. Importantly, the gels containing non-agglomerated NPs could be restored by simple addition of DMF to the xerogel and applying a heating-cooling cycle.…”

Section: Formation Of Gold Nanoparticles-containing Gelsmentioning

confidence: 99%

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Use of a bis-1,2,3-triazole gelator for the preparation of supramolecular metallogels and stabilization of gold nanoparticles

et al. 2019

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Section: Formation Of Metallogelsmentioning

confidence: 59%

Section: Formation Of Gold Nanoparticles-containing Gelsmentioning

confidence: 99%

Section: Formation Of Gold Nanoparticles-containing Gelsmentioning

confidence: 99%

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Use of a bis-1,2,3-triazole gelator for the preparation of supramolecular metallogels and stabilization of gold nanoparticles

et al. 2019

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“…The effect of diffusive mixing taking place at the early stages of assembly—as is the case for liposome systems 38 —is propagated into the formation of the gel, even in the presence of drugs that are incorporated. These effects may be of interest for the preparation of other composite materials, such as gel–nanoparticle materials, 39 and for the use of this kind of mixing in additive manufacturing applications of soft materials. 40 The gels formed under microfluidic mixing here were found to be more stable, consistent, and with better drug incorporation than the gels from bulk gelation, and the combination of gels for vehicles and microfluidics for mixing are promising variables in the search for materials for drug delivery.…”

Section: Discussionmentioning

confidence: 99%

Drug-Loaded Supramolecular Gels Prepared in a Microfluidic Platform: Distinctive Rheology and Delivery through Controlled Far-from-Equilibrium Mixing

et al. 2017

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It is shown here that controlled mixing of a gelator, drug, solvent, and antisolvent in a microfluidic channel leads to faster setting gels and more robust materials with longer release profiles than the physical gels of the same composition obtained using random mixing in solution. The system is similar to a related gelator system we had studied previously, but we were unable to apply the same gelling procedure because of the instability of the colloid caused by the small structural modification (length of the alkyl chain in the bis-imidazolium head group). This situation holds true for the gels formed with varying compositions and under different conditions (gelator/drug ratio, solvent proportion, and flow rates), with the most significant differences being the improved gel rheology and slower drug release rates. Very importantly, the gels (based on a previously unexplored system) have a higher water content ratio (water/EtOH 4:1) than others in the family, making their medicinal application more attractive. The gels were characterized by a variety of microscopy techniques, X-ray diffraction and infrared spectroscopy, and rheology. Salts of the antiinflammatory drugs ibuprofen and indomethacin were successfully incorporated into the gels. The diffraction experiments indicate that these composite gels with relatively short alkyl chains in the gelator component contrast to previous systems, in that they exhibit structural order and the presence of crystalline areas of the drug molecule implying partial phase separation (even though these drug crystallites are not discernible by microscopy). Furthermore, the release study with the gel incorporating ibuprofenate showed promising results that indicate a possible drug delivery vehicle application for this and related systems.

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“…Polymer composites containing silver particles have been widely used in wound dressings, scaffolds, water purification systems and medical devices [16]. The production methods of composite materials containing silver, such as gas condensation [17], electrochemical [18] and salt reduction [19], have been widely used. Wei et al [20] synthesized nanosilver through ultraviolet irradiation.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Superabsorbent Polymers from Tara Gum Grafted Poly(Acrylic acid) Embedded Silver Particles

et al. 2018

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Tara gum/silver composite superabsorbent polymers were synthesized with tara gum grafted poly(acrylic acid), using K 2 S 2 O 8 (KPS) as an initiator and N,N -methylenebisacrylamide (MBA) as a cross-linker. The products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the silver ions were partially reduced to Ag 0 and the amorphous nanoparticles containing Ag 0 and Ag 2 O were around 10~50 nm in size The tara gum/silver composite superabsorbent polymers exhibited an interconnected porous structure with strong water absorption capacity. The swelling ratio of each product could reach 473 g/g in distilled water and 62 g/g in 0.9% NaCl solution. The antimicrobial activity of the samples against Staphylococcus aureus and Escherichia coli increased with the addition of AgNO 3 from 0 to 125 mg. This work indicates that the developed tara gum/silver composite superabsorbent polymers can be potentially used for biomedical applications.

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In situ template synthesis of gold nanoparticles using a bis-imidazolium amphiphile-based hydrogel

Cited by 10 publications

References 38 publications

Use of a bis-1,2,3-triazole gelator for the preparation of supramolecular metallogels and stabilization of gold nanoparticles

Use of a bis-1,2,3-triazole gelator for the preparation of supramolecular metallogels and stabilization of gold nanoparticles

Drug-Loaded Supramolecular Gels Prepared in a Microfluidic Platform: Distinctive Rheology and Delivery through Controlled Far-from-Equilibrium Mixing

Antibacterial Superabsorbent Polymers from Tara Gum Grafted Poly(Acrylic acid) Embedded Silver Particles

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