Materials Literature
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E-mail: yslee@snu.ac.kr (Y.-S. Lee); jeongdh@snu.ac.kr (D. H. Jeong)Received July 9, 2013, Accepted August 4, 2013Key Words : SERS, Clustering control, Gold nanoparticle, Solid support, Optical bio-probeSingle molecule-level sensitivity of surface-enhanced Ramanscattering (SERS) was known approximately fifteen yearsag…
To develop a methodology for absolute determination of the surface areal density of functional groups on organic and bio thin films, medium energy ion scattering (MEIS) spectroscopy was utilized to provide references for calibration of X-ray photoelectron spectroscopy (XPS) or Fourier transformation-infrared (FT-IR) i…
Quantum chemistry calculations were done, using the ONIOM2 methodology at two different levels of calculation, B3LYP for the high level and UFF for the low level. These calculations were performed on Au5/SAPO-11, Au6/SAPO-11, CO-Au5/SAPO-11 and CO-Au6/SAPO-11 aggregates to analyze the geometries of small clusters of A…
Salah satu persyaratan dalam struktur beton bertulang adalah dengan adanya lekatan antara baja tulangan dan beton. Hilangnya lekatan antara beton dan baja tulangan pada struktur mengakibatkan keruntuhan total pada beton. Untuk menghindari hal tersebut perlu ditinjau nilai tegangan lekat beton dan baja tulangan agar di…
M13 bacteriophages are assembled via a covalent layer-by-layer process to form a highly nanoporous network capable of organizing nanoparticles and acting as a scaffold for templating metal-oxides. The morphological and optical properties of the film itself are presented as well as its ability to organize and disperse…
In this study, we carried out two-layer ONIOM(DFT:MM) calculations to determine the adsorption enthalpies and vibrational frequencies of NO and CO molecules, on palladium exchanged zeolite (Pd/ZSM-5) catalyst. The results reveal that the local Al distribution near to Pd+2 influence the stretching f requencies as well…
The structure graphene has a semiconductor character, however this property can be modified by the incorporation of defects produced by desorption of carbon atoms or adsorption on the surface metals. Therefore has an importance in areas of catalysis, new generations of batteries and nanoelectronics . This work was don…
摘要以Ti-52％Al合金为研究对象，在Bridgman定向凝固炉中进行不同时间的热稳定处理实验及相关的定向凝固实验，研究了定向凝固前糊状区的形成及其微观组织演化、界面形态和溶质分布，并考察了热稳定处理对定向凝固组织的影响．结果表明，试样熔化后形成了由a相晶粒、晶粒间富Al液滴和液相通道组成的糊状区，糊状区前沿为完全液相区．随着热稳定处理时间的增加，糊状区内a晶粒逐渐融合且沿温度梯度方向定向排布，富Al液滴和液相通道逐渐消失，固／液界面变得光滑平整．热稳定处理时间足够长时，糊状区内为单一的a相，溶质Al的成分在生长方向近似沿着a固相线变化．根据溶质守恒计算得出完全液相区内溶质Al含量为52．21％，高于试样原始成分，与实验测量结果…
In this work, we study the interaction between OH radicals with black carbon (BC) modeled by a coronene molecule by means of quantum chemistry calculations MOPAC, DeMon-nano, DeMon2K packages with the purpose of understand the aging process of this m
Chemical looping oxygen production (CLOP) is a new air separation technology for producing oxygen. The features of CLOP are operation-simple, cost-effective and energy-extensive. The continuous or discontinuous oxygen production process is achieved by cycling of oxygen carriers between the reduction and oxidation reac…
No AccessPolymer ExtrusionApr 2014Different Types of ExtrudersChris RauwendaalChris RauwendaalSearch for more papers by this authorhttps://doi.org/10.3139/9781569905395.002SectionsAboutPDF ToolsAdd to FavoritesDownload CitationTrack CitationsCopy LTI LinkPDF key 'share (en)' returned an object instead of string.Facebo…
No AccessPolymer ExtrusionApr 2014Functional Process AnalysisChris RauwendaalChris RauwendaalSearch for more papers by this authorhttps://doi.org/10.3139/9781569905395.007SectionsAboutPDF ToolsAdd to FavoritesDownload CitationTrack CitationsCopy LTI LinkPDF key 'share (en)' returned an object instead of string.Faceboo…
Nanotubes (NTs) are promising candidates as energy storage materials for hydrogen, electricity, and lithium because of their unique structural, mechanical, and electrical properties. The performance of NT-based energy storage materials is considerably improved compared to the conventional bulk-based materials. In addi…
A hydrothermal method was used to synthesize type-II CdTe/CdSe core/shell quantum dots (QDs) using the thilglycolic acid (TGA) capped CdTe QDs as cores, which show a number of advantages. Because of the spatial separation of carriers the low excited states of CdTe/CdSe QDs, they exhibit many novel properties that are…
Coenzyme Q10 (CoQ10) has been reported as a powerful antioxidant in plasma. Recent in vivo investigations showed that cosmetically applied CoQ10 can reduce photo-aging. However, CoQ10 was barely satisfactory in topical drug delivery because of its poor solubility and high molecular weight. To improve the anti-oxidativ…
We present a methodology to determine the periodic potential of a surface from angle-resolved photoemission spectroscopy. By mapping the band structure and measuring the energy gap widths at high symmetry points of the surface Brillouin zone, the first Fourier components of the potential can be estimated. This method…
In this paper, we report our numerical study on the electrical and optical properties in HTL/mCP/ETL multilayer organic light emitting diode (OLED) device structure. Our finite element method (FEM) model includes the transport behavior of electrons and holes, the generation and decay of excitons, and emission and exti…
Fe-doped titania nanotube arrays (NTs) were fabricated by electrochemical anodization on a Ti foil using Fe(NO3)3 · 2H2O as iron source. Their morphology, structure and optical properties were investigated by field emission scanning electron microscopy, X-ray diffraction, UV-visible absorption spectroscopy and photolu…
We report a simple one-pot synthesis of graphene nanosheets wrapped poly(3-methylthiophene) (GNs-f-P3MT) composites. At first, natural graphite was oxidized using the Hummer's method followed by chemical reduction with hydrazine monohydrate to yield GNs. Subsequently, in-situ chemical oxidative polymerization of 3-met…
A series of bipolar anthracene derivatives containing pyridine as an electron withdrawing group and cabazole, triphenylamine and indole as electron donating groups were synthesized and characterized. Particularly, Device E, 9-(4'-(10-(pyridin-2-yl)anthracen-9-yl)biphenyl-4-yl)-9H-carbazol exhibits a high-efficient dee…