Tuesday, September 02, 2014

Ca2+-Dependent Intracellular Drug Delivery System Developed with “Raspberry-Type” Particles-on-a-Particle Comprising Mesoporous Silica Core and α-Synuclein-Coated Gold Nanoparticles

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ACS Nano

DOI: 10.1021/nn5034955




Daekyun Lee, Je Won Hong, Chanyoung Park, Hagyeol Lee, Ji Eun Lee, Taeghwan Hyeon and Seung R. Paik

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Nature and Role of Activated Molecular Oxygen Species at the Gold/Titania Interface in the Selective Oxidation of Alcohols

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The Journal of Physical Chemistry C

DOI: 10.1021/jp5060233




Matteo Farnesi Camellone and Dominik Marx

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Adjustment and Control of Energy Levels for TiO2–N/ZrO2–xNx with Enhanced Visible Light Photocatalytic Activity

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The Journal of Physical Chemistry C

DOI: 10.1021/jp505921s




Yanlong Yu, Peng Zhang, Yuanjiang Kuang, Yihong Ding, Jianghong Yao, Jingjun Xu and Yaan Cao

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Transport Through Self-Assembled Monolayer Molecular Junctions: Role of In-Plane Dephasing

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The Journal of Physical Chemistry C

DOI: 10.1021/jp503887p




Yonatan Dubi

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Proton Conduction in a Nonporous One Dimensional Coordination Polymer

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Chemistry of Materials

DOI: 10.1021/cm502142a




Jolanta Stankiewicz, Milagros Tomás, Isabel T. Dobrinovitch, Elena Forcén-Vázquez and Larry R. Falvello

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Cross Relaxation Induced Pure Red Upconversion in Activator- and Sensitizer-Rich Lanthanide Nanoparticles

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Chemistry of Materials

DOI: 10.1021/cm5022382




Wei Wei, Yan Zhang, Rui Chen, Julian Goggi, Na Ren, Ling Huang, Kishore K. Bhakoo, Handong Sun and Timothy Thatt Yang Tan

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Crystal Phase-Dependent Nanophotonic Resonances in InAs Nanowire Arrays

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Nano Letters

DOI: 10.1021/nl502306x




Nicklas Anttu, Sebastian Lehmann, Kristian Storm, Kimberly A. Dick, Lars Samuelson, Phillip M. Wu and Mats-Erik Pistol

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Photothermal Heating Enabled by Plasmonic Nanostructures for Electrokinetic Manipulation and Sorting of Particles

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ACS Nano

DOI: 10.1021/nn502294w




Justus Chukwunonso Ndukaife, Avanish Mishra, Urcan Guler, Agbai George Agwu Nnanna, Steven T. Wereley and Alexandra Boltasseva

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Liquid Crystal Size Selection of Large-Size Graphene Oxide for Size-Dependent N-Doping and Oxygen Reduction Catalysis

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ACS Nano

DOI: 10.1021/nn5024544




Kyung Eun Lee, Ji Eun Kim, Uday Narayan Maiti, Joonwon Lim, Jin Ok Hwang, Jongwon Shim, Jung Jae Oh, Taeyeong Yun and Sang Ouk Kim

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Pore Confined Synthesis of Magnesium Boron Hydride Nanoparticles

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The Journal of Physical Chemistry C

DOI: 10.1021/jp507568p




Yuen S. Au, Yigang Yan, Krijn P. de Jong, Arndt Remhof and Petra E. de Jongh

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Experimental Verification of Carrier Multiplication in Graphene

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Nano Letters

DOI: 10.1021/nl502114w




T. Plötzing, T. Winzer, E. Malic, D. Neumaier, A. Knorr and H. Kurz

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Covalently coupled hybrid of graphitic carbon nitride with reduced graphene oxide as a superior performance lithium-ion battery anode




Nanoscale , 2014, Advance Article

DOI: 10.1039/C4NR03145H, Paper

Yongsheng Fu, Junwu Zhu, Chong Hu, Xiaodong Wu, Xin Wang

An in situ covalently coupled graphitic carbon nitride with reduced graphene oxide exhibits an unprecedented high, stable and reversible capacity of 1525 mA h g-1 at a current density of 100 mA g-1 after 50 cycles, suggesting a remarkably promising candidate for energy storage.

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Versatile Electronic Properties of VSe2 Bulk, Few-Layers, Monolayer, Nanoribbons, and Nanotubes: A Computational Exploration

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The Journal of Physical Chemistry C

DOI: 10.1021/jp507093t




Fengyu Li, Kaixiong Tu and Zhongfang Chen

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Vacancy formation on C60/Pt (111): unraveling the complex atomistic mechanism

The interaction of fullerenes with transition metal surfaces leads to the development of an atomic network of ordered vacancies on the metal. However, the structure and formation mechanism of this intricate surface reconstruction is not yet understood at an atomic level. We combine scanning tunneling microscopy, high resolution and temperature programmed-x-ray photoelectrons spectroscopy, and density functional theory calculations to show that the vacancy formation in C60/Pt(111) is a complex process in which fullerenes undergo two significant structural rearrangements upon thermal annealing. At first, the molecules are physisorbed on the surface; next, they chemisorb inducing the formation of an adatom–vacancy pair on the side of the fullerene. Finally, this metastable state relaxes when the adatom migrates away and the vacancy moves under the molecule. The evolution from a weakly-bound fullerene to a chemisorbed state with a vacancy underneath could be triggered by residual H a...



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Formation and disruption of conductive filaments in a HfO 2 /TiN structure

The process of the formation and disruption of nanometric conductive filaments in a HfO 2 /TiN structure is investigated by conductive atomic force microscopy. The preforming state evidences nonhomogeneous conduction at high fields through conductive paths, which are associated with pre-existing defects and develop into conductive filaments with a forming procedure. The disruption of the same filaments is demonstrated as well, according to a bipolar operation. In addition, the conductive tip of the microscopy is exploited to perform electrical operations on single conductive spots, which evidences that neighboring conductive filaments are not electrically independent. We propose a picture that describes the evolution of the shape of the conductive filaments in the processes of their formation and disruption, which involves the development of conductive branches from a common root; this root resides in the pre-existing defects that lay at the HfO 2 /TiN interface...

S Brivio, G Tallarida, E Cianci and S Spiga

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Characterization of conductive nanobiomaterials derived from viral assemblies by low-voltage STEM imaging and Raman scattering

New technologies require the development of novel nanomaterials that need to be fully characterized to achieve their potential. High-resolution low-voltage scanning transmission electron microscopy (STEM) has proven to be a very powerful technique in nanotechnology, but its use for the characterization of nanobiomaterials has been limited. Rotavirus VP6 self-assembles into nanotubular assemblies that possess an intrinsic affinity for Au ions. This property was exploited to produce hybrid nanobiomaterials by the in situ functionalization of recombinant VP6 nanotubes with gold nanoparticles. In this work, Raman spectroscopy and advanced analytical electron microscopy imaging with spherical aberration-corrected (Cs) STEM and nanodiffraction at low-voltage doses were employed to characterize nanobiomaterials. STEM imaging revealed the precise structure and arrangement of the protein templates, as well as the nanostructure and atomic arrangement of gold nanoparticles with high ...

Germán Plascencia-Villa, Liliana Carreño-Fuentes, Daniel Bahena, Miguel José-Yacamán, Laura A Palomares and Octavio T Ramírez

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Fully tunable, non-invasive thermal biasing of gated nanostructures suitable for low-temperature studies

There is much recent interest in the thermoelectric (TE) characterization of single nanostructures at low temperatures, because such measurements yield information that is complementary to traditional conductance measurements, and because they may lead to novel paradigms for TE energy conversion. However, previously reported techniques for thermal biasing of nanostructures are difficult to use at low temperatures because of unintended global device heating, the lack of ability to continuously tune the thermal bias, or limited compatibility with gating techniques. By placing a heater directly on top of the electrical contact to a single InAs nanowire, we demonstrate fully tunable thermal biases of up to several tens of Kelvin, combined with negligible overall heating of the device, and with full functionality of a back gate, in the temperature range between 4 K and 300 K.



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The ultimate step towards a tailored engineering of core@shell and core@shell@shell nanoparticles




Nanoscale , 2014, Advance Article

DOI: 10.1039/C4NR02913E, Paper

D. Llamosa, M. Ruano, L. Martinez, A. Mayoral, E. Roman, M. Garcia-Hernandez, Y. Huttel

Core@shell and core@shell@shell nanoparticles are building blocks for more sophisticated systems and a plethora of applications. The one-step generation of such complex nanoparticles is reported where the atoms of the core and shell can be easily inverted, avoiding intrinsic constraints of chemical methods.

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Single nickel-related defects in molecular-sized nanodiamonds for multicolor bioimaging: an ab initio study




Nanoscale , 2014, Advance Article

DOI: 10.1039/C4NR03112A, Paper

Gergo Thiering, Elisa Londero, Adam Gali

Multicolor fluorescence from single nickel-related color centers for in vivo bioimaging using nanodiamonds.

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Ligand-free Ni nanocluster formation at atmospheric pressure via rapid quenching in a microplasma process

The production of metal nanoclusters composed of less than 10 3 atoms is important for applications in energy conversion and medicine, and for fundamental studies of nanomaterial nucleation and growth. Unfortunately, existing synthesis methods do not enable adequate control of cluster formation, particularly at atmospheric pressure wherein formation typically occurs on sub-millisecond timescales. Here, we demonstrate that ligand-free, unagglomerated nickel nanoclusters can be continuously synthesized at atmospheric pressure via the decomposition of bis(cyclopentadienyl)nickel(II) (nickelocene) in a spatially-confined microplasma process that rapidly quenches particle growth and agglomeration. The clusters were measured on line by ion mobility spectrometry (IMS) and further analyzed by atomic force microscopy (AFM). Our results reveal that stable clusters with spherical equivalent mean diameters below 10 ##IMG## [http://ift.tt/1tqA41d...] {$\dot{A}$}

Ajay Kumar, Seungkoo Kang, Carlos Larriba-Andaluz, Hui Ouyang, Christopher J Hogan and R Mohan Sankaran

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Transfer doping of single isolated nanodiamonds, studied by scanning probe microscopy techniques

The transfer doping of diamond surfaces has been applied in various novel two-dimensional electronic devices. Its extension to nanodiamonds (ND) is essential for ND-based applications in many fields. In particular, understanding the influence of the crystallite size on transfer doping is desirable. Here, we report the results of a detailed study of the electronic energetic band structure of single, isolated transfer-doped nanodiamonds with nanometric resolution using a combination of scanning tunneling spectroscopy and Kelvin force microscopy measurements. The results show how the band gap, the valence band maximum, the electron affinity and the work function all depend on the ND’s size and nanoparticle surface properties. The present analysis, which combines information from both scanning tunneling spectroscopy and Kelvin force microscopy, should be applicable to any nanoparticle or surface that can be measured with scanning probe techniques.

Asaf Bolker, Cecile Saguy and Rafi Kalish

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Transparent conducting oxide nanotubes

Thin film or porous membranes made of hollow, transparent, conducting oxide (TCO) nanotubes, with high chemical stability, functionalized surfaces and large surface areas, can provide an excellent platform for a wide variety of nanostructured photovoltaic, photodetector, photoelectrochemical and photocatalytic devices. While large-bandgap oxide semiconductors offer transparency for incident light (below their nominal bandgap), their low carrier concentration and poor conductivity makes them unsuitable for charge conduction. Moreover, materials with high conductivity have nominally low bandgaps and hence poor light transmittance. Here, we demonstrate thin films and membranes made from TiO 2 nanotubes heavily-doped with shallow Niobium (Nb) donors (up to 10%, without phase segregation), using a modified electrochemical anodization process, to fabricate transparent conducting hollow nanotubes. Temperature dependent current–voltage characteristics revealed that TiO 2

Yahya Alivov, Vivek Singh, Yuchen Ding and Prashant Nagpal

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Superlubricity of two-dimensional fluorographene/MoS 2 heterostructure: a first-principles study

The atomic-scale friction of the fluorographene (FG)/MoS 2 heterostructure is investigated using first-principles calculations. Due to the intrinsic lattice mismatch and formation of periodic Moiré patterns, the potential energy surface of the FG/MoS 2 heterostructure is ultrasmooth and the interlayer shear strength is reduced by nearly two orders of magnitude, compared with both FG/FG and MoS 2 /MoS 2 bilayers, entering the superlubricity regime. The size dependency of superlubricity is revealed as being based on the relationship between the emergence of Moiré patterns and the lattice mismatch ratio for heterostructures.

Lin-Feng Wang, Tian-Bao Ma, Yuan-Zhong Hu, Quanshui Zheng, Hui Wang and Jianbin Luo

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Mucus barrier-triggered disassembly of siRNA nanocarriers




Nanoscale , 2014, Advance Article

DOI: 10.1039/C4NR01584C, Paper

Troels B. Thomsen, Leon Li, Kenneth A. Howard

This paper presents a new mechanism for chitosan-based siRNA nanocarrier interaction and transport across mucus of the gastrointestinal tract. This mechanism suggests disassembly of the nanocarriers and concomitant diffusion of siRNA through the mucus barrier. This is the first example of mucin-triggered decomplexation and transport that provide design guidelines for RNAi-based nanocarrier therapy targeted at mucosal sites.

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One pot synthesis of hollow Cu-doped Ru octahedral nanocage via in situ generated metastable Cu nanoparticle template

Nanoscale , 2014, Accepted Manuscript

DOI: 10.1039/C4NR03308F, Communication

Kwangyeol Lee, Donghwan Yoon, Suhyun Park, Jongsik Park, Hionsuck Baik, Haesik Yang, Jongchan Kim

A facile synthetic strategy has been developed for a hollow Ru octahedral nanocage via in situ generated metastable facet-controlled Cu nanooctahedron. Co-decomposition of Cu and Ru precursors forms a metastable...

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Selenium/interconnected porous hollow carbon bubbles Composites as the cathodes of Li-Se batteries with high performance

Nanoscale , 2014, Accepted Manuscript

DOI: 10.1039/C4NR03705G, Paper

Jingjing Zhang, Long Fan, Yongchun Zhu, Yanhua Xu, Jianwen Liang, denghu Wei, Yitai Qian

A kind of Se/C nanocomposites is fabricated by dispersing selenium in the interconnected porous hollow carbon bubbles (PHCBs) via a melt-diffusion method. Such PHCBs are composed of porous hollow carbon...

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Porous alumina-metallic Pt/Pd, Cr or Al layered nanocoatings with fully controlled variable interference colors

Nanoscale , 2014, Accepted Manuscript

DOI: 10.1039/C4NR03167A, Paper

Mikhail Pashchanka, Sandeep Yadav, Thorsten Cottre, Joerg J Schneider

Metallic Cr, Al, and Pt/Pd alloy have been deposited by magnetron sputtering or thermal evaporation (resistance heating or electron beam heating) onto nanoporous anodic alumina and have allowed to facilitate...

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Encapsulation of Nanoscale Metal Oxides into Ultra-thin Ni Matrix for Superior Li-Ion Batteries: A Versatile Strategy

Nanoscale , 2014, Accepted Manuscript

DOI: 10.1039/C4NR03661A, Paper

Ting Yu, Jian Jiang, Jianhui Zhu, Wei Ai, Zhanxi Fan, Xintang Huang, Hua Zhang

Li-ion batteries (LIBs) performance proves highly correlated with ionic and electrical transport kinetics in electrode. Despite continual progress has been achieved on rational design of ideal electrode systems, their energy...

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Chemically Exfoliated ReS2 Nanosheets

Nanoscale , 2014, Accepted Manuscript

DOI: 10.1039/C4NR03740E, Communication

T Fujita, Yoshikazu Ito, Yongwen TAN, Hisato Yamaguchi, Daisuke Hoko, A hirata, Damien Adrien Voiry, Manish Chhowalla, Mingwei CHEN

The production of two-dimensional rhenium disulfide (ReS2) nanosheets by exfoliation using lithium intercalation is demonstrated. The vibrational and photoluminescence properties of the exfoliated nanosheets are investigated, and the local atomic...

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One-Step Gas-Solid Reaction Synthesis of W@WS2 Nanorattles and Their Novel Catalytic Activity

Nanoscale , 2014, Accepted Manuscript

DOI: 10.1039/C4NR03220A, Paper

Yan Wen, Haijun Zhang, Shaowei Zhang

W@WS2 nanorattles were synthesised by heating a mixture of WO3 nanoparticle and S at a relatively low temperature between 750-950[degree]C in H2/Ar. In addition to temperature, the competition between the...

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