Publications by authors named "Minok Park"

Article Synopsis
  • A drug called 1,4-DPCA acts as a PHD inhibitor, promoting tissue regeneration by boosting the activity of Hif-1α even when oxygen levels are normal.
  • Researchers designed a drug delivery system using polydopamine (PDA) to encapsulate 1,4-DPCA, which helps enhance its regenerative effects by producing reactive oxygen species (ROS) that improve cellular defenses.
  • The study found that this combined approach resulted in about six times more bone regeneration in mice compared to untreated controls.
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Article Synopsis
  • This review explores the advancements in light-material interactions (LMIs) with a focus on lasers and flashlights for energy conversion and storage, highlighting key parameters like light sources and interaction time.
  • It discusses various light-induced processes such as melting and crystallization, which are crucial for creating effective energy materials and devices.
  • The study also outlines the potential applications of LMIs in energy systems, including sensors and batteries, while acknowledging the existing challenges and emphasizing the importance of continued research and collaboration in this field.
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Frequent blood glucose monitoring is a crucial routine for diabetic patients. Traditional invasive methods can cause discomfort and pain and even pose a risk of infection. As a result, researchers have been exploring noninvasive techniques.

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This work demonstrates a method to design photonic surfaces by combining femtosecond laser processing with the inverse design capabilities of tandem neural networks that directly link laser fabrication parameters to their resulting textured substrate optical properties. High throughput fabrication and characterization platforms are developed that generate a dataset comprising 35280 unique microtextured surfaces on stainless steel with corresponding measured spectral emissivities. The trained model utilizes the nonlinear one-to-many mapping between spectral emissivity and laser parameters.

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Gigahertz (GHz) femtosecond (fs) lasers have opened possibilities for enhancing and controlling the laser machining quality to engineer the physicochemical properties of materials. However, fundamental understanding of laser-material interactions by GHz fs laser has remained unsolved due to the complexity of associated ablation dynamics. Here, we study the ablation dynamics of copper (Cu) by GHz fs bursts using in situ multimodal diagnostics, time-resolved scattering imaging, emission imaging, and emission spectroscopy.

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Laser-Induced Breakdown Spectroscopy (LIBS) is a promising technology for in-situ analysis of Plasma-Facing Components in magnetic confinement fusion facilities. It is of major interest to monitor the hydrogen isotope retention i.e.

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Polydopamine (PDA) is a simple and versatile conformal coating material that has been proposed for a variety of uses; however in practice its performance is often hindered by poor mechanical properties and high roughness. Here, we show that blue-diode laser annealing dramatically improves mechanical performance and reduces roughness of PDA coatings. Laser-annealed PDA (LAPDA) was shown to be >100-fold more scratch resistant than pristine PDA and even better than hard inorganic substrates, which we attribute to partial graphitization and covalent coupling between PDA subunits during annealing.

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Cardiac tissues are able to adjust their contractile behavior to adapt to the local mechanical environment. Nonuniformity of the native tissue mechanical properties contributes to the development of heart dysfunctions, yet the current in vitro cardiac tissue models often fail to recapitulate the mechanical nonuniformity. To address this issue, a 3D cardiac microtissue model is developed with engineered mechanical nonuniformity, enabled by 3D-printed hybrid matrices composed of fibers with different diameters.

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