0000000000654595

AUTHOR

Sanghyuk Wooh

showing 3 related works from this author

Plasmon-enhanced photocurrent in quasi-solid-state dye-sensitized solar cells by the inclusion of gold/silica core–shell nanoparticles in a TiO2 phot…

2013

Direct evidence of the effects of the localized surface plasmon resonance (LSPR) of gold nanoparticles (Au NPs) in TiO2 photoanodes on the performance enhancement in quasi-solid-state dye-sensitized solar cells (DSCs) is reported by comparing gold/silica core–shell nanoparticles (Au@SiO2 NPs) and hollow silica nanoparticles with the same shell size of the core–shell nanoparticles. The Au nanoparticles were shelled by a thin SiO2 layer to produce the core–shell structure, and the SiO2 hollow spheres were made by dissolving the Au cores of the gold/silica core–shell nanoparticles. Therefore, the size and morphology of the SiO2 hollow spheres were the same as the Au@SiO2 NPs. The energy conver…

PhotocurrentMaterials scienceRenewable Energy Sustainability and the EnvironmentEnergy conversion efficiencyNanoparticleNanotechnologyGeneral ChemistryDye-sensitized solar celllocalized surface plasmon resonanceColloidal goldgold nanoparticlessolar cellsGeneral Materials SciencenanoparticlesSurface plasmon resonanceQuasi-solidPlasmon
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Synthesis of Mesoporous Supraparticles on Superamphiphobic Surfaces

2015

A method for mesoporous supraparticle synthesis on superamphiphobic surfaces is designed. Therefore, supraparticles assembled with nanoparticles are synthesized by the evaporation of nanoparticle dispersion drops on the superamphiphobic surface. For synthesis, no further purification is required and no organic solvents are wasted. Moreover, by changing the conditions such as drop size and concentration, supraparticles of different sizes, compositions, and architectures are fabricated.

TitaniumMaterials scienceDrop sizeSurface PropertiesMechanical EngineeringMetal NanoparticlesTin CompoundsWaterNanoparticlechemistry.chemical_elementNanoparticle dispersionEvaporation (deposition)Chemical engineeringchemistryMechanics of MaterialsMicroscopy Electron ScanningGeneral Materials SciencePorosityMesoporous materialMetal nanoparticlesHydrophobic and Hydrophilic InteractionsPorosityTitanium
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Anchor‐Functionalized Push‐Pull‐Substituted Bis(tridentate) Ruthenium(II) Polypyridine Chromophores: Photostability and Evaluation as Photosensitizers

2014

Stable push-pull substituted heteroleptic bis(tridentate) ruthenium(II) polypyridine complexes with COOH or 2,2′-bipyridine anchor groups have been prepared and characterized by 1H, 13C and 15N NMR 1D and 2D spectroscopy, infrared spectroscopy, elemental analysis, high-resolution ESI mass spectrometry, electrochemistry, UV/Vis absorption spectroscopy, luminescence spectroscopy, and density functional calculations. The complexes feature a pronounced electronic directionality and high absorption wavelengths up to λmax = 544 nm extending to 720 nm as a result of favorable push-pull substitutions. A remarkable photostability in the presence of water and coordinating ions (I–) was discovered for…

Inorganic ChemistrychemistryAbsorption spectroscopyPhotodissociationchemistry.chemical_elementInfrared spectroscopyChromophorePhotochemistryElectrochemistryLuminescenceSpectroscopyRutheniumEuropean Journal of Inorganic Chemistry
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