Korea Advanced Institute of Science and Technology · Materials Science
Professor Sung Oh Cho's research lab specializes in the design, synthesis, and application of advanced nanomaterials for energy and environmental technologies. Key research directions include plasmonic photocatalysts for solar energy conversion, quantum dot-sensitized photoelectrodes for solar fuel generation, and nanostructured materials for hydrogen storage and superhydrophobic surfaces. The lab employs innovative fabrication techniques such as sonochemistry, electron beam irradiation, and solution-based deposition to create functional nanoarchitectures with tunable optical, electronic, and surface properties.
Figures are computed from collected data and may differ slightly.
A novel one-step sonochemical approach to synthesize a plasmonic photocatalyst of AgCl nanocubes (ca. 115 nm in edge length) with a small amount of Ag metal species is presented. The nanoscale Ag/AgCl hybrid photocatalysts with cubic morphology are readily formed under ambient ultrasonic conditions and neither external heat treatment nor reducing agents are required. The size of the Ag/AgCl photocatalysts could be controlled by changing the concentrations of Ag(+) ions and polyvinylpyrrolidone m
Immer acht: Einkristalline Au-Nanooktaeder mit genau definierter Form und einstellbarer Größe konnten mit einem modifizierten Polyolprozess hergestellt werden. Die oktaedrischen Au-Nanokristalle haben scharfe Ecken und optische Eigenschaften, die empfindlich auf die Kristallgröße und das Abschneiden von Spitzen reagieren. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2007/z604167_s.pdf or from the author. Please note: The publisher
A thin layer of CuInS2 and CdS quantum dots (QDs) is deposited on TiO2 nanotube arrays (TNTs) to form CdS/CuInS2/TNTs photoelectrodes. The CuInS2 layer is prepared by a successive ionic layer absorption and reaction method, and the CdS QDs are deposited by a chemical bath deposition method. The CuInS2 layer acts as both a co-sensitizer and an energy barrier layer between TNTs and CdS QDs. The deposited CuInS2 layer significantly extends the visible-light response of CdS-sensitized TNTs into 500–
Hydrogen storage and release are two essential parameters that define the efficiency of a hydrogen storage medium. Herein, we investigate the effects of the external electric field F on the adsorption-desorption of H2 on a Ca-decorated silicene system (Ca-silicene) based on density functional theory calculations. Our study demonstrates that nine H2 molecules per Ca atom can be adsorbed and 6.4 wt% H2 can be adsorbed on Ca-silicene with an average binding energy of 0.19 eV per H2, while the appro
Abstract Unique hierarchical pore structures were fabricated by simply irradiating an electron beam onto silicone grease films. The hierarchical pore structures consisted of micrometer‐sized pores and macroporous walls. Due to the high surface roughness, the hierarchical pore structures exhibited both superhydrophobicity with a water contact angle (CA) of 170° and superhydrophilicity with an extremely low water CA of 3° after the chemical treatment of the surfaces. In addition to the hierarchica
The luminescent emittance color of non-emissive polystyrene (PS) is varied from blue to white by irradiation with an electron beam. Desired luminescent nanoarchitectures and nanopatte rns are produced in straightforward manner by direct electron-beam writing and by irradiating well-defined PS nanoarchitectures prep ared by various bottom-up approaches. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2008/adma200702221_s.pdf or from t
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