Incorporation of graphene oxide into C12E4/C12mimBr hybrid lyotropic liquid crystal and its thermo-sensitive properties

Wang, Lin; Xin, Xia; Yang, Mengzhou; Shen, Jinglin; Yuan, Shiling

doi:10.1039/c5ra13497h

Cited by 10 publications

(6 citation statements)

References 41 publications

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“…Spherical aggregates and typical Maltese cross texture were observed in optical microscope and under polarized light, respectively, confirming the presence of lamellar structure in aggregates (Figure S2a,b). − To explore the real structures of these spherical aggregates, SEM experiments were carefully performed and giant vesicles with diameter of about 1–10 μm were clearly observed (Figure a). Different from conventional vesicles assembled by surfactants or lipids in aqueous or nonaqueous solutions that collapse immediately on solid surfaces after evaporation of the solvent, it is interesting to find that our vesicles could keep the original morphology during the solvent evaporating, which shows a solid-like property.…”

Section: Resultsmentioning

confidence: 99%

Ionic Self-Assembly of a Giant Vesicle as a Smart Microcarrier and Microreactor

Shen

Xin

et al. 2016

Langmuir

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Giant vesicles (1-10 μm) were constructed via a facile ionic self-assembly (ISA) strategy using an anionic dye Acid Orange II (AO) and an oppositely charged ionic-liquid-type cationic surfactant 1-tetradecyl-3-methylimidazolium bromide (C14mimBr). This is the first report about preparing giant vesicles through ISA strategy. Interestingly, the giant vesicle could keep the original morphology during the evaporation of solvent and displayed solid-like properties at low concentration. Moreover, giant vesicles with large internal capacity volume and good stability in solution could also be achieved by increasing the concentrations of AO and C14mimBr which contributed to the increase of the other noncovalent cooperative interactions. In order to facilitate comparison, a series of parallel experiments with similar materials were carried out to investigate and verify the driving forces for the formation of these kinds of giant vesicles by changing the hydrophobic moieties or the head groups of the surfactants. It is concluded that the electrostatic interaction, hydrophobic effect and π-π stacking interaction play key roles in this self-assembly process. Importantly, the giant vesicles can act as a smart microcarrier to load and release carbon quantum dot (CQD) under control. Besides, the giant vesicles could also be applied as a microrector to synthesize monodispersed Ag nanoparticles with diameter of about 5-10 nm which exhibited the ability to catalyze reduction of 4-nitroaniline. Therefore, it is indicated that our AO/C14mimBr assemblies hold promising applications in the areas of microencapsulation, catalyst support, and lightweight composites owing to their huge sizes and large microcavities.

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Section: Resultsmentioning

confidence: 99%

Ionic Self-Assembly of a Giant Vesicle as a Smart Microcarrier and Microreactor

Shen

Xin

et al. 2016

Langmuir

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“…10 and 15 nm, respectively; and Figure 5b and d indicated the nanostructure of GO consisted of the pores of ca. 10 and 15 nm in diameter as hexagonal structures, [30] respectively. The long‐range ordered nanostructures were in good accord with the low‐angle XRD data in Figure 2 and 3.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Nanostructured Graphene Oxide and Its Application in Drug Loading and Sustained Release

You

Guo

et al. 2022

ChemistrySelect

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Graphene oxide (GO) and its derivatives are considered as a promising drug carrier in tumor therapy due to their excellent biocompatibility. Here, a series of nanostructured GO with long‐range ordered lamellar or hexagonal structure were prepared by lyotropic liquid crystals (LLCs) templating strategy and used as drug carriers. The nanostructure was verified via polarized‐light optical microscopy (POM), low angle X‐ray diffraction (XRD) and transmission electron microscopy (TEM), which showed that the interlayer spacing or pore size was determined by the carbon chain length of templating molecular. 5‐fluorouracil (5‐Fu), doxorubicin (DOX) and docetaxel (DOC) which had gradually increased molecular size were chosen as model drugs, and the highly ordered nanochannels can be used as space for adsorption and diffusion of drug molecules. Ultraviolet spectrometer and simulated release test in vitro were used to determine drug loading capacity and drug release performance. The results showed that larger pore diameter/layer spacing was beneficial to the adsorption and diffusion of drug molecules, especially those with shorter molecule size. Besides, the water‐solvable DOX exhibited fast release rate than the hydrophobic 5‐Fu and DOC. The in vitro cytotoxicity assay demonstrated the good biocompatibility of both the pristine GO and the nanostructured GO.

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“…All the ratios of the two peaks are 1 : 2, suggesting a typical lamellar structure of Rheological measurements can give macro properties of the system, and it is an important method to investigate LLC materials. [31][32][33] The results of the rheological properties of liquid crystal composites as a function of the concentration of C To further characterize the features of the formed nanostructures at various concentrations of C 12 E 4 and C 16 -GK-3, the FTIR and CD spectra were measured, as shown in Fig. 11.…”

Section: Microstructures Of the Self-assembled Aggregatesmentioning

confidence: 99%