Publications by authors named "JinHyeong Lee"
Electrostatically Powered Multimode Liquid Crystalline Elastomer Actuators.
ACS Appl Mater Interfaces
December 2023
Soft actuators based on liquid crystalline elastomers (LCEs) are captivating significant interest because of their unique properties combining the programmable liquid crystalline molecular order and elasticity of polymeric materials. For practical applications, the ability to perform multimodal shape changes in a single LCE actuator at a subsecond level is a bottleneck. Here, we fabricate a monodomain LCE powered by electrostatic force, which enables fast multidirectional bending, oscillation, rotation, and complex actuation with a high degree of freedom.
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- The gastrointestinal tract in adults is crucial for understanding digestion, absorption, and the gut-brain connection, while also allowing for the study of responses to dietary and microbial changes.
- Researchers have developed 353 GAL4 lines, along with split-GAL4 lines, that target specific cell types in the gut, such as enteric neurons and enterocytes, enabling more detailed studies of gut function.
- This extensive GAL4 resource is accessible online through the K-Gut Project, offering valuable tools for investigating various gut cell populations and their roles in biological processes.
In this study, the influence of drying conditions on amine (-NH) functionalization of graphene oxide (GO) was evaluated, and the hexavalent chromium (Cr(VI)) adsorption efficiency of the prepared materials was compared. 3-[2-(2-aminoehtylamino) ethylamino]propyl-trimethoxysilane (3N) was used for amine functionalization. The synthesized materials were analyzed by SEM, BET, TGA, XPS, and EA.
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- - Adsorption using amino silane-graphene oxide composites, such as pN-GO, psN-GO, and pssN-GO, is an effective approach to remove hexavalent chromium (Cr(VI)) from contaminated water.
- - The study found that the composite with pssN-GO had the highest Cr(VI) adsorption capacity (260.74 mg/g) due to the synergistic effect of secondary amines, while primary amines showed lower efficiency.
- - Kinetic analysis revealed that pssN-GO favored monolayer adsorption, whereas psN-GO and pN-GO experienced multilayer adsorption, with adsorption behavior best described by the pseudo-second-order model for p
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- Researchers developed functionalized mesoporous silica using (3-aminopropyl)trimethoxysilane (APTMS) to remove chromium(VI) from water.
- * As the concentration of APTMS increased, the surface area of the silica decreased, but its ability to absorb Cr(VI) improved significantly.
- * The study suggests that an optimal APTMS concentration of around 0.05 M maximizes Cr(VI) removal, where electrostatic interactions play a key role.