김건호 교수

Functionalized graphene-polymer nanocomposites have gained significant attention for their enhanced mechanical, thermal, and antibacterial properties, but the requirement of multi-step processes or hazardous reducing agents to functionalize graphene limits their current applications. Here, we present a single-step synthesis of thermally reduced graphene oxide (TrGO) based on shellac, which is a low-cost biopolymer that can be employed to produce poly(vinyl alcohol) (PVA)/TrGO nanocomposites (PVA

Edge-to-center density ratios were measured by using a floating harmonics method in inductively coupled plasma (ICP) and were compared to the theoretical model. As the gas pressure increased, the plasma density at the center increased. However, plasma density at the edge showed a different trend; it had a maximum value at 10 mTorr with increasing gas pressures, regardless of ICP powers. This unexpected result could be explained by a global power balance equation. (C) 2010 American Institute of P

The present study demonstrated that not only chain extension but also torsion of repeating units and steric hindrance should be considered when designing a thermally conductive polymer by extended chain conformation.

The interpretation of hydraulic fracturing pressure was initiated by Nolte and Smith in the 1980s. An accurate interpretation of hydraulic fracturing pressures is critical to understand and improve the fracture treatment in tight gas formations. In this paper, accurate calculation of bottomhole treating pressure was achieved by incorporating hydrostatic pressure, fluid friction pressure, fracture fluid property changes along the wellbore, friction due to proppant, perforation friction, tortuosit

In this work, a porous diatomite ceramic filter (PDCF) was synthesized and then modified with acid and alkali for the adsorption of H₂S and NH₃. PDCF was characterized by XRF, SEM, TGA, XRD and EDS. Sintering temperature exhibited significant effect on the density and compression strength, and PDCF at 1,100℃ is the best sample due to its excellent adsorption performance and sufficient compressive strength. In addition, NaOH and H₃PO₄ can greatly alter surface properties, such as increased surfac

<b>Background and Aims:</b> Despite its relatively low incidence rate compared to others, pancreatic cancer has a poor prognosis owing to its late detection and poor response to systemic chemotherapy. Because the effectiveness of chemotherapy is still restricted, the need for locoregional treatment is increasing. Cryoablation is an effective and minimally invasive treatment for some cancers, but its efficiency in pancreatic cancer is limited. Despite recent reports about promising outcomes, the

Transdermal drug delivery holds significant potential for treating skin conditions. Conventional methods utilizing needles or large unit drug delivery volumes often result in patient discomfort and inhomogeneous delivery. This study proposes a picoliter ice particle delivery (PIPD) technology that produces high-speed solid ice drug particles using controlled supersonic cryogenic jets for transdermal drug delivery. The proposed PIPD system simultaneously atomizes liquid drug to micro-droplets, fr