Thursday, November 27, 2014

Realization of high Curie temperature ferromagnetism in atomically thin MoS2 and WS2 nanosheets with uniform and flower-like morphology




Nanoscale , 2015, Advance Article

DOI: 10.1039/C4NR06141A, Paper

Zhaolong Yang, Daqiang Gao, Jing Zhang, Qiang Xu, Shoupeng Shi, Kun Tao, Desheng Xue

High Curie temperature ferromagnetism has been realized in atomically thin MoS2 and WS2 nanosheets.

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Comparative lung toxicity of engineered nanomaterials utilizing in vitro , ex vivo and in vivo approaches

Background: Although engineered nanomaterials (ENM) are currently regulated either in the context of a new chemical, or as a new use of an existing chemical, hazard assessment is still to a large extent reliant on information from historical toxicity studies of the parent compound, and may not take into account special properties related to the small size and high surface area of ENM. While it is important to properly screen and predict the potential toxicity of ENM, there is also concern that current toxicity tests will require even heavier use of experimental animals, and reliable alternatives should be developed and validated. Here we assessed the comparative respiratory toxicity of ENM in three different methods which employed in vivo, in vitro and ex vivo toxicity testing approaches. Methods: Toxicity of five ENM (SiO2 (10), CeO2 (23), CeO2 (88), TiO2 (10), and TiO2 (200); parentheses indicate average ENM diameter in nm) were tested in this study. CD-1 mice were exposed to the ENM by oropharyngeal aspiration at a dose of 100??g. Mouse lung tissue slices and alveolar macrophages were also exposed to the ENM at concentrations of 22?132 and 3.1-100??g/mL, respectively. Biomarkers of lung injury and inflammation were assessed at 4 and/or 24?hr post-exposure. Results: Small-sized ENM (SiO2 (10), CeO2 (23), but not TiO2 (10)) significantly elicited pro-inflammatory responses in mice (in vivo), suggesting that the observed toxicity in the lungs was dependent on size and chemical composition. Similarly, SiO2 (10) and/or CeO2 (23) were also more toxic in the lung tissue slices (ex vivo) and alveolar macrophages (in vitro) compared to other ENM. A similar pattern of inflammatory response (e.g., interleukin-6) was observed in both ex vivo and in vitro when a dose metric based on cell surface area (?g/cm2), but not culture medium volume (?g/mL) was employed. Conclusion: Exposure to ENM induced acute lung inflammatory effects in a size- and chemical composition-dependent manner. The cell culture and lung slice techniques provided similar profiles of effect and help bridge the gap in our understanding of in vivo, ex vivo, and in vitro toxicity outcomes.

Yong Kim

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Evaluating the effect of assay preparation on the uptake of gold nanoparticles by RAW264.7 cells

Background: Cell culture conditions can greatly influence the results of nanoparticle (NP) uptake assays. In this study, 10?nm gold nanoparticles (AuNPs) and RAW 264.7 macrophages were used as a model system, while instrumental neutron activation analysis (NAA) was used as the elemental analysis technique to determine AuNP levels produced by the various culturing conditions. Static plate-based and insert-based culture conditions were compared with a dynamic suspension culture to evaluate the conditions? effect on the rate and extent of AuNP uptake. Results: The results indicate that a dynamic culturing condition allows for the greatest NP uptake (approximately 3-5 times over the adherent conditions), whereas the plate-based assays have the initial highest rate of NP incorporation. Conclusions: These data highlight the importance of judiciously choosing the assay conditions prior to evaluating NP uptake.

Simona Bancos

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Development of antibody functionalized magnetic nanoparticles for the immunoassay of carcinoembryonic antigen: a feasibility study for clinical use

Background: Magnetic nanoparticles functionalized antibodies are used for in-vitro assays on bio-markers. This work demonstrates the synthesis of high-quality magnetic nanoparticles coated with antibodies against carcinoembryonic antigen (CEA). Various characterizations, such as particle size, particle suspension, bio-activity and the stability of bio-magnetic nanoparticles suspended in liquid, are studied. The properties for the assay of CEA molecules in serum are also studied. The assay method used is so-called immunomagnetic reduction. Results: The results show that the effects of common materials in serum that interfere with detected signals are not significant. The low-detection limit is 0.21?ng/ml, which is well below the clinical threshold of 2.5?ng/ml. Conclusions: The dynamic range for the assay of CEA molecules in serum is 500?ng/ml. By assaying serum CEA molecules from 24 normal controls and 30 colorectal-cancer patients, the threshold for the serum-CEA concentration to diagnose colorectal cancer is 4.05?ng/ml, which results in a clinical sensitivity of 0.90 and specificity of 0.87.

Che-Chuan Yang

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Wednesday, November 26, 2014

Facile Synthesis of an Extensive Family of Sc2O@C2n (n = 35–47) and Chemical Insight into the Smallest Member of Sc2O@C2(7892)–C70

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The Journal of Physical Chemistry C

DOI: 10.1021/jp509975w




Meirong Zhang, Yajuan Hao, Xiaohong Li, Lai Feng, Ting Yang, Yingbo Wan, Ning Chen, Zdeněk Slanina, Filip Uhlík and Hailin Cong

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Morphological Tunability of the Plasmonic Response: From Hollow Gold Nanoparticles to Gold Nanorings

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The Journal of Physical Chemistry C

DOI: 10.1021/jp5096129




Martin Prieto, Raul Arenal, Luc Henrard, Leyre Gomez, Victor Sebastian and Manuel Arruebo

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Effect of the Partial Replacement of CaH2 with CaF2 in the Mixed System CaH2 + MgB2

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The Journal of Physical Chemistry C

DOI: 10.1021/jp508780b




C. Pistidda, F. Karimi, S. Garroni, A. Rzeszutek, C. Bonatto Minella, C. Milanese, T. T. Le, L. H. Rude, J. Skibsted, T. R. Jensen, C. Horstmann, C. Gundlach, M. Tolkiehn, P. K. Pranzas, A. Schreyer, T. Klassen and M. Dornheim

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How Do Intermolecular Interactions Affect Swelling of Polyketones with a Differing Number of Carbonyl Groups? An In Situ ATR-FTIR Spectroscopic Study of CO2 Sorption in Polymers

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The Journal of Physical Chemistry C

DOI: 10.1021/jp510208e




Andrew V. Ewing, Anton A. Gabrienko, Sergey V. Semikolenov, Konstantin A. Dubkov and Sergei G. Kazarian

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Structural Transformations of Zinc Oxide Layers on Pt(111)

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The Journal of Physical Chemistry C

DOI: 10.1021/jp510069q




Bo-Hong Liu, Martin E. McBriarty, Michael J. Bedzyk, Shamil Shaikhutdinov and Hans-Joachim Freund

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Demonstration of Strong Near-Field Radiative Heat Transfer between Integrated Nanostructures

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Nano Letters

DOI: 10.1021/nl503236k




Raphael St-Gelais, Biswajeet Guha, Linxiao Zhu, Shanhui Fan and Michal Lipson

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Ge Nanoparticles Encapsulated in Nitrogen-Doped Reduced Graphene Oxide as an Advanced Anode Material for Lithium-Ion Batteries

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The Journal of Physical Chemistry C

DOI: 10.1021/jp509783h




Yan Xu, Xiaoshu Zhu, Xiaosi Zhou, Xia Liu, Yunxia Liu, Zhihui Dai and Jianchun Bao

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Tiling Phosphorene

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ACS Nano

DOI: 10.1021/nn5059248




Jie Guan, Zhen Zhu and David Tománek

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Ketone Binding at Amino and Ureido Monolayer/Solvent Interfaces Studied by Nonlinear Optical Techniques

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The Journal of Physical Chemistry C

DOI: 10.1021/jp509392r




Zhiguo Li, Champika N. Weeraman and Julianne M. Gibbs-Davis

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Ion Transport in Electrolytes for Dye-Sensitized Solar Cells: A Combined Experimental and Theoretical Study

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The Journal of Physical Chemistry C

DOI: 10.1021/jp509193h




José Manuel Vicent-Luna, Jesús Idígoras, Said Hamad, Sofía Calero and Juan Antonio Anta

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Inhibition of Osteoclast Differentiation by Gold Nanoparticles Functionalized with Cyclodextrin Curcumin Complexes

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ACS Nano

DOI: 10.1021/nn504329u




Dong Nyoung Heo, Wan-Kyu Ko, Ho-Jin Moon, Han-Jun Kim, Sang Jin Lee, Jung Bok Lee, Min Soo Bae, Jin-Kyu Yi, Yu-Shik Hwang, Jae Beum Bang, Eun-Cheol Kim, Sun Hee Do and Il Keun Kwon

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From 1D to 3D Ru Nanostructures on a Pt Stepped Surface as Model Systems in Electrocatalysis: UHV-STM and XPS Study

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The Journal of Physical Chemistry C

DOI: 10.1021/jp509574s




Emilia A. Carbonio, Mauricio J. Prieto, Abner de Siervo and Richard Landers

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Highly Efficient Bipolar Host Materials with Indenocarbazole and Pyrimidine Moieties for Phosphorescent Green Light-Emitting Diodes

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The Journal of Physical Chemistry C

DOI: 10.1021/jp507036h




Gyeong Heon Kim, Raju Lampande, Mi Jin Park, Hyeong Woo Bae, Ji Hoon Kong, Jang Hyuk Kwon, Jung Hwan Park, Yong Wook Park and Choong Eui Song

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Light Harvesting and Charge Separation in a π-Conjugated Antenna Polymer Bound to TiO2

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The Journal of Physical Chemistry C

DOI: 10.1021/jp5113558




Gyu Leem, Zachary A. Morseth, Egle Puodziukynaite, Junlin Jiang, Zhen Fang, Alexander T. Gilligan, John R. Reynolds, John M. Papanikolas and Kirk S. Schanze

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Controlled Synthesis of Ordered Mesoporous Carbohydrate-Derived Carbons with Flower-like Structure and N-Doping by Self-Transformation

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Chemistry of Materials

DOI: 10.1021/cm503669v




Shiping Wang, Chuanlong Han, Jing Wang, Jiang Deng, Minglei Zhu, Jia Yao, Haoran Li and Yong Wang

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Efficient and Robust Host–Guest Antenna Composite for Light Harvesting

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Chemistry of Materials

DOI: 10.1021/cm503761q




André Devaux, Gion Calzaferri, Peter Belser, Pengpeng Cao, Dominik Brühwiler and Andreas Kunzmann

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