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Nature Nanotechnology

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https://www.readbyqxmd.com/read/27893732/multiple-nanostructures-based-on-anodized-aluminium-oxide-templates
#1
Liaoyong Wen, Rui Xu, Yan Mi, Yong Lei
Several physico-chemical effects and properties in the solid state involve nanoscale interactions between adjacent materials and morphologies. Arrays of binary nanostructures can generate intimate interactions between different sub-components, but fabricating binary nanostructures is challenging. Here, we propose a concept to achieve diverse binary nanostructure arrays with high degrees of controllability for each of the sub-components, including material, dimension and morphology. This binary nanostructuring concept originates with a distinctive binary-pore anodized aluminium oxide template that includes two dissimilar sets of pores in one matrix, where the openings of the two sets of pores are towards opposite sides of the template...
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27893731/observation-of-extreme-phase-transition-temperatures-of-water-confined-inside-isolated-carbon-nanotubes
#2
Kumar Varoon Agrawal, Steven Shimizu, Lee W Drahushuk, Daniel Kilcoyne, Michael S Strano
Fluid phase transitions inside single, isolated carbon nanotubes are predicted to deviate substantially from classical thermodynamics. This behaviour enables the study of ice nanotubes and the exploration of their potential applications. Here we report measurements of the phase boundaries of water confined within six isolated carbon nanotubes of different diameters (1.05, 1.06, 1.15, 1.24, 1.44 and 1.52 nm) using Raman spectroscopy. The results reveal an exquisite sensitivity to diameter and substantially larger temperature elevations of the freezing transition (by as much as 100 °C) than have been theoretically predicted...
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27893730/fluorescent-nanodiamond-tracking-reveals-intraneuronal-transport-abnormalities-induced-by-brain-disease-related-genetic-risk-factors
#3
Simon Haziza, Nitin Mohan, Yann Loe-Mie, Aude-Marie Lepagnol-Bestel, Sophie Massou, Marie-Pierre Adam, Xuan Loc Le, Julia Viard, Christine Plancon, Rachel Daudin, Pascale Koebel, Emilie Dorard, Christiane Rose, Feng-Jen Hsieh, Chih-Che Wu, Brigitte Potier, Yann Herault, Carlo Sala, Aiden Corvin, Bernadette Allinquant, Huan-Cheng Chang, François Treussart, Michel Simonneau
Brain diseases such as autism and Alzheimer's disease (each inflicting >1% of the world population) involve a large network of genes displaying subtle changes in their expression. Abnormalities in intraneuronal transport have been linked to genetic risk factors found in patients, suggesting the relevance of measuring this key biological process. However, current techniques are not sensitive enough to detect minor abnormalities. Here we report a sensitive method to measure the changes in intraneuronal transport induced by brain-disease-related genetic risk factors using fluorescent nanodiamonds (FNDs)...
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27893729/programmable-disorder-in-random-dna-tilings
#4
Grigory Tikhomirov, Philip Petersen, Lulu Qian
Scaling up the complexity and diversity of synthetic molecular structures will require strategies that exploit the inherent stochasticity of molecular systems in a controlled fashion. Here we demonstrate a framework for programming random DNA tilings and show how to control the properties of global patterns through simple, local rules. We constructed three general forms of planar network-random loops, mazes and trees-on the surface of self-assembled DNA origami arrays on the micrometre scale with nanometre resolution...
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27893728/dna-origami-tiles-nanoscale-mazes
#5
Fei Zhang, Fan Hong, Hao Yan
No abstract text is available yet for this article.
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27870844/raman-spectroscopy-tipping-point
#6
Guillaume Goubert, Richard P Van Duyne
No abstract text is available yet for this article.
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27870843/high-electron-mobility-quantum-hall-effect-and-anomalous-optical-response-in-atomically-thin-inse
#7
Denis A Bandurin, Anastasia V Tyurnina, Geliang L Yu, Artem Mishchenko, Viktor Zólyomi, Sergey V Morozov, Roshan Krishna Kumar, Roman V Gorbachev, Zakhar R Kudrynskyi, Sergio Pezzini, Zakhar D Kovalyuk, Uli Zeitler, Konstantin S Novoselov, Amalia Patanè, Laurence Eaves, Irina V Grigorieva, Vladimir I Fal'ko, Andre K Geim, Yang Cao
A decade of intense research on two-dimensional (2D) atomic crystals has revealed that their properties can differ greatly from those of the parent compound. These differences are governed by changes in the band structure due to quantum confinement and are most profound if the underlying lattice symmetry changes. Here we report a high-quality 2D electron gas in few-layer InSe encapsulated in hexagonal boron nitride under an inert atmosphere. Carrier mobilities are found to exceed 10(3) cm(2) V(-1) s(-1) and 10(4) cm(2) V(-1) s(-1) at room and liquid-helium temperatures, respectively, allowing the observation of the fully developed quantum Hall effect...
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27870842/probing-the-electronic-and-catalytic-properties-of-a-bimetallic-surface-with-3%C3%A2-nm-resolution
#8
Jin-Hui Zhong, Xi Jin, Lingyan Meng, Xiang Wang, Hai-Sheng Su, Zhi-Lin Yang, Christopher T Williams, Bin Ren
An atomic- and molecular-level understanding of heterogeneous catalysis is required to characterize the nature of active sites and improve the rational design of catalysts. Achieving this level of characterization requires techniques that can correlate catalytic performances to specific surface structures, so as to avoid averaging effects. Tip-enhanced Raman spectroscopy combines scanning probe microscopy with plasmon-enhanced Raman scattering and provides simultaneous topographical and chemical information at the nano/atomic scale from ambient to ultrahigh-vacuum and electrochemical environments...
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27870841/tracking-the-dynamics-of-circulating-tumour-cell-phenotypes-using-nanoparticle-mediated-magnetic-ranking
#9
Mahla Poudineh, Peter M Aldridge, Sharif Ahmed, Brenda J Green, Leyla Kermanshah, Vivian Nguyen, Carmen Tu, Reza M Mohamadi, Robert K Nam, Aaron Hansen, Srikala S Sridhar, Antonio Finelli, Neil E Fleshner, Anthony M Joshua, Edward H Sargent, Shana O Kelley
Profiling the heterogeneous phenotypes of rare circulating tumour cells (CTCs) in whole blood is critical to unravelling the complex and dynamic properties of these potential clinical markers. This task is challenging because these cells are present at parts per billion levels among normal blood cells. Here we report a new nanoparticle-enabled method for CTC characterization, called magnetic ranking cytometry, which profiles CTCs on the basis of their surface expression phenotype. We achieve this using a microfluidic chip that successfully processes whole blood samples...
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27870840/single-nanotube-tracking-reveals-the-nanoscale-organization-of-the-extracellular-space-in-the-live-brain
#10
Antoine G Godin, Juan A Varela, Zhenghong Gao, Noémie Danné, Julien P Dupuis, Brahim Lounis, Laurent Groc, Laurent Cognet
The brain is a dynamic structure with the extracellular space (ECS) taking up almost a quarter of its volume. Signalling molecules, neurotransmitters and nutrients transit via the ECS, which constitutes a key microenvironment for cellular communication and the clearance of toxic metabolites. The spatial organization of the ECS varies during sleep, development and aging and is probably altered in neuropsychiatric and degenerative diseases, as inferred from electron microscopy and macroscopic biophysical investigations...
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27870839/nanomedicine-catching-tumour-cells-in-the-zone
#11
Susan E Leggett, Ian Y Wong
No abstract text is available yet for this article.
November 21, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27842065/host-guest-chemistry-with-water-soluble-gold-nanoparticle-supraspheres
#12
Yizhan Wang, Offer Zeiri, Manoj Raula, Benjamin Le Ouay, Francesco Stellacci, Ira A Weinstock
The uptake of molecular guests, a hallmark of the supramolecular chemistry of cages and containers, has yet to be documented for soluble assemblies of metal nanoparticles. Here we demonstrate that gold nanoparticle-based supraspheres serve as a host for the hydrophobic uptake, transport and subsequent release of over two million organic guests, exceeding by five orders of magnitude the capacities of individual supramolecular cages or containers and rivalling those of zeolites and metal-organic frameworks on a mass-per-volume basis...
November 14, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27842064/normal-superconducting-and-topological-regimes-of-hybrid-double-quantum-dots
#13
D Sherman, J S Yodh, S M Albrecht, J Nygård, P Krogstrup, C M Marcus
Epitaxial semiconductor-superconductor hybrid materials are an excellent basis for studying mesoscopic and topological superconductivity, as the semiconductor inherits a hard superconducting gap while retaining tunable carrier density. Here, we investigate double-quantum-dot structures made from InAs nanowires with a patterned epitaxial Al two-facet shell that proximitizes two gate-defined segments along the nanowire. We follow the evolution of mesoscopic superconductivity and charging energy in this system as a function of magnetic field and voltage-tuned barriers...
November 14, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27842063/creating-biomolecular-motors-based-on-dynein-and-actin-binding-proteins
#14
Akane Furuta, Misako Amino, Maki Yoshio, Kazuhiro Oiwa, Hiroaki Kojima, Ken'ya Furuta
Biomolecular motors such as myosin, kinesin and dynein are protein machines that can drive directional movement along cytoskeletal tracks and have the potential to be used as molecule-sized actuators. Although control of the velocity and directionality of biomolecular motors has been achieved, the design and construction of novel biomolecular motors remains a challenge. Here we show that naturally occurring protein building blocks from different cytoskeletal systems can be combined to create a new series of biomolecular motors...
November 14, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27842062/tuning-membrane-protein-mobility-by-confinement-into-nanodomains
#15
Andreas Karner, Benedikt Nimmervoll, Birgit Plochberger, Enrico Klotzsch, Andreas Horner, Denis G Knyazev, Roland Kuttner, Klemens Winkler, Lukas Winter, Christine Siligan, Nicole Ollinger, Peter Pohl, Johannes Preiner
High-speed atomic force microscopy (HS-AFM) can be used to visualize function-related conformational changes of single soluble proteins. Similar studies of single membrane proteins are, however, hampered by a lack of suitable flat, non-interacting membrane supports and by high protein mobility. Here we show that streptavidin crystals grown on mica-supported lipid bilayers can be used as porous supports for membranes containing biotinylated lipids. Using SecYEG (protein translocation channel) and GlpF (aquaglyceroporin), we demonstrate that the platform can be used to tune the lateral mobility of transmembrane proteins to any value within the dynamic range accessible to HS-AFM imaging through glutaraldehyde-cross-linking of the streptavidin...
November 14, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27819695/spintronics-electric-control-of-skyrmions
#16
Achim Rosch
No abstract text is available yet for this article.
November 7, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27819694/electric-field-driven-switching-of-individual-magnetic-skyrmions
#17
Pin-Jui Hsu, André Kubetzka, Aurore Finco, Niklas Romming, Kirsten von Bergmann, Roland Wiesendanger
Controlling magnetism with electric fields is a key challenge to develop future energy-efficient devices. The present magnetic information technology is mainly based on writing processes requiring either local magnetic fields or spin torques, but it has also been demonstrated that magnetic properties can be altered on the application of electric fields. This has been ascribed to changes in magnetocrystalline anisotropy caused by spin-dependent screening and modifications of the band structure, changes in atom positions or differences in hybridization with an adjacent oxide layer...
November 7, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27819693/microsupercapacitors-as-miniaturized-energy-storage-components-for-on-chip-electronics
#18
REVIEW
Nana Amponsah Kyeremateng, Thierry Brousse, David Pech
The push towards miniaturized electronics calls for the development of miniaturized energy-storage components that can enable sustained, autonomous operation of electronic devices for applications such as wearable gadgets and wireless sensor networks. Microsupercapacitors have been targeted as a viable route for this purpose, because, though storing less energy than microbatteries, they can be charged and discharged much more rapidly and have an almost unlimited lifetime. In this Review, we discuss the progress and the prospects of integrated miniaturized supercapacitors...
November 7, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27819692/strong-suppression-of-shot-noise-in-a-feedback-controlled-single-electron-transistor
#19
Timo Wagner, Philipp Strasberg, Johannes C Bayer, Eddy P Rugeramigabo, Tobias Brandes, Rolf J Haug
Feedback control of quantum mechanical systems is rapidly attracting attention not only due to fundamental questions about quantum measurements, but also because of its novel applications in many fields in physics. Quantum control has been studied intensively in quantum optics but progress has recently been made in the control of solid-state qubits as well. In quantum transport only a few active and passive feedback experiments have been realized on the level of single electrons, although theoretical proposals exist...
November 7, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27819691/high-strength-magnetically-switchable-plasmonic-nanorods-assembled-from-a-binary-nanocrystal-mixture
#20
Mingliang Zhang, Daniel J Magagnosc, Iñigo Liberal, Yao Yu, Hongseok Yun, Haoran Yang, Yaoting Wu, Jiacen Guo, Wenxiang Chen, Young Jae Shin, Aaron Stein, James M Kikkawa, Nader Engheta, Daniel S Gianola, Christopher B Murray, Cherie R Kagan
Next-generation 'smart' nanoparticle systems should be precisely engineered in size, shape and composition to introduce multiple functionalities, unattainable from a single material. Bottom-up chemical methods are prized for the synthesis of crystalline nanoparticles, that is, nanocrystals, with size- and shape-dependent physical properties, but they are less successful in achieving multifunctionality. Top-down lithographic methods can produce multifunctional nanoparticles with precise size and shape control, yet this becomes increasingly difficult at sizes of ∼10 nm...
November 7, 2016: Nature Nanotechnology
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