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Cover image for Vol. 10 Issue 10

May 28, 2014

Volume 10, Issue 10

Pages 1877–2107

  1. Cover Picture

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    9. Communications
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      Tumor Imaging: Tumor-Responsive Fluorescent Light-up Probe Based on a Gold Nanoparticle/Conjugated Polyelectrolyte Hybrid (Small 10/2014) (page 1877)

      Youyong Yuan, Dan Ding, Kai Li, Jie Liu and Bin Liu

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470056

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      A tumor-responsive nanoprobe is reported on page 1967 by B. Liu and co-workers based on a conjugated polyelectrolyte and a gold nanoparticle (AuNP) hybrid is designed to fluoresce in response to the low pH extracellular microenvironment in tumors. AuNPs with positive surface charges are prepared by directly reducing Au salt with sodium borohydride and stabilization by cystamine. A pH-triggered, charge-reversible polymer and a water-soluble cationic conjugated polyelectrolyte (CPE) are sequentially deposited onto the AuNP surface through electrostatic interaction. Under physiological conditions (pH ≈ 7.4), the hybrid probe is almost non-fluorescent due to the quenching of CPE by AuNPs. When exposed to acidic extracellular microenvironments in tumors (pHe ≈ 6.5), the acid-labile amides hydrolyze into primary amines. The generated amine groups result in strong electrostatic repulsion between CPE and AuNPs, leading to recovered probe fluorescence. The fluorescence turnon is further utilized for extracellular acidic tumor microenvironment imaging in vivo, which provides new opportunities for easy tumor imaging and identification.

  2. Inside Front Cover

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      MRI Agents: Ellipsoidal Microcavities: Electromagnetic Properties, Fabrication, and Use as Multispectral MRI Agents (Small 10/2014) (page 1878)

      Gary Zabow, Stephen J. Dodd and Alan P. Koretsky

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470057

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      On page 1902, G. Zabow and co-workers introduce a new, simple approach to transform microspheres into almost mathematically exact ellipsoids and ellipsoidal shell particles. Micro-ellipsoids are increasingly valued for unique packings and selfassemblies of anisotropic materials, but hollowed-out ellipsoids can also generate uniform local electromagnetic fields, a feature unexploited until now. Demonstrating their utility, the hollow ellipsoids are used to controllably tune the NMR frequencies of surrounding water molecules, enabling also a new form of multispectral MRI agent.

  3. Back Cover

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      Field Effect Transistors: Direct-Write Complementary Graphene Field Effect Transistors and Junctions via Near-Field Electrospinning (Small 10/2014) (page 2112)

      Jiyoung Chang, Yumeng Liu, Kwang Heo, Byung Yang Lee, Seung-Wuk Lee and Liwei Lin

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470062

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      A novel process to create a self-aligned and chemically doped graphene channel is presented by L. Lin and co-workers on page 1920. Near-field electrospinning, reengineered from conventional electrospinning, is utilized to pattern and chemically dope the graphene layer using functionalized polymers such as PEI and PEO. Arbitrary patterning is readily available to write channels on either flexible or dielectric substrates. Field effects of p- and n-type graphene channel transistors are fabricated and a complimentary inverter circuitry using electronic junctions is successfully demonstrated. This work may be the impetus for substantial and practical development in graphene-based electronics.

  4. Masthead

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      Masthead: (Small 10/2014)

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470061

  5. Contents

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      Contents: (Small 10/2014) (pages 1879–1886)

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470058

  6. Concepts

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    1. Tumor Vasculature Targeting: A Generally Applicable Approach for Functionalized Nanomaterials (pages 1887–1893)

      Feng Chen and Weibo Cai

      Version of Record online: 3 MAR 2014 | DOI: 10.1002/smll.201303627

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      Efficient and targeted delivery of nanomaterials to the tumor site is one of the biggest challenges in the war against cancer. As a promising and versatile strategy for functionalized nanomaterials, tumor vasculature targeting can give an extra boost to tumor accumulation (when passive targeting based on the EPR effect is prominent) or enable tumor-specific targeting (when EPR effect is negligible) of various novel nanomaterials.

  7. Frontispiece

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      Photonic Crystals: Ordered 2D Colloidal Photonic Crystals on Gold Substrates by Surfactant-Assisted Fast-Rate Dip Coating (Small 10/2014) (page 1894)

      Eileen Armstrong, Worawut Khunsin, Michal Osiak, Martin Blömker, Clivia M. Sotomayor Torres and Colm O'Dwyer

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470059

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      On page 1895, C. O'Dwyer and co-workers report the surfactantinduced ordering of 2D and 3D colloidal crystal photonic crystals on metallic substrates by dip-coating at fast rates. Ordered monolayer opals on conductive Au-coated Si substrates behave as a 2D diffraction grating. This method allows high throughput, ordered colloidal crystal formation useful as nanomaterials templates for energy storage or functional materials.

  8. Communications

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    1. Ordered 2D Colloidal Photonic Crystals on Gold Substrates by Surfactant-Assisted Fast-Rate Dip Coating (pages 1895–1901)

      Eileen Armstrong, Worawut Khunsin, Michal Osiak, Martin Blömker, Clivia M. Sotomayor Torres and Colm O'Dwyer

      Version of Record online: 3 MAR 2014 | DOI: 10.1002/smll.201303616

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      Surfactant induced ordering of 2D and 3D colloidal crystal photonic crystals is possible on metallic substrates by dip-coating at fast rates (≈1 mm/min). Ordered monolayer opals on conductive gold-coated silicon substrates behave as a 2D diffraction grating. The method allows high throughput, ordered colloidal crystal formation useful as nanomaterials templates for energy storage or functional materials.

    2. Ellipsoidal Microcavities: Electromagnetic Properties, Fabrication, and Use as Multispectral MRI Agents (pages 1902–1907)

      Gary Zabow, Stephen J. Dodd and Alan P. Koretsky

      Version of Record online: 13 MAR 2014 | DOI: 10.1002/smll.201303045

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      A simple new approach for transforming micro- and nanoscale spheres into eccentric ellipsoids and for generating hollow ellipsoidal shell particles is demonstrated based on a rotating, angled, evaporative deposition process. The resulting ellipsoidal shells possess unique electromagnetic field properties that enable a new form of multispectral labeling agent for magnetic resonance imaging applications.

    3. Silicon-Vacancy Color Centers in Nanodiamonds: Cathodoluminescence Imaging Markers in the Near Infrared (pages 1908–1913)

      Huiliang Zhang, Igor Aharonovich, David R. Glenn, Richard Schalek, Andrew P. Magyar, Jeff W. Lichtman, Evelyn L. Hu and Ronald L. Walsworth

      Version of Record online: 4 MAR 2014 | DOI: 10.1002/smll.201303582

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      Nanodiamonds doped with silicon-vacancy (Si-V) color centers are shown to be a promising candidate for cathodoluminescence (CL) imaging at the nanoscale, providing bright, non-bleaching, narrow-linewidth emission at wavelengths within the near-IR window of biological tissue. CL emission intensity from negative charge-state Si-V centers is greatly enhanced by increasing the nitrogen concentration during nanodiamond growth.

    4. Controlled Hydrogel Fiber Formation: The Unique Case of Hexaphenylbenzene-Poly(ethylene glycol) Amphiphiles (pages 1914–1919)

      Katrin Wunderlich, Antje Larsen, John Marakis, George Fytas, Markus Klapper and Klaus Müllen

      Version of Record online: 25 FEB 2014 | DOI: 10.1002/smll.201302832

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      Bundles of fibers of hexaphenylbenzene-PEG derivatives in aqueous solutions are inferred from polarized and depolarized light scattering. The water uptake behavior and the self-assembled structures can be controlled by changing the length of the PEG chains. With shorter PEG chains, the objects contain less water and the density of the self-assembled structures is higher.

    5. Direct-Write Complementary Graphene Field Effect Transistors and Junctions via Near-Field Electrospinning (pages 1920–1925)

      Jiyoung Chang, Yumeng Liu, Kwang Heo, Byung Yang Lee, Seung-Wuk Lee and Liwei Lin

      Version of Record online: 5 MAR 2014 | DOI: 10.1002/smll.201302965

      Thumbnail image of graphical abstract

      A novel process to create self-aligned and chemically doped graphene channel is presented. Near-field electrospinning is utilized to pattern and chemically dope the graphene layer using functionalized polymers such as PEI and PEO. Field effects of p- and n-type graphene channel transistors are fabricated and complimentary inverter circuitry using electronic junctions is successfully demonstrated.

    6. Alignment of Organic Semiconductor Microstripes by Two-Phase Dip-Coating (pages 1926–1931)

      Mengmeng Li, Cunbin An, Wojciech Pisula and Klaus Müllen

      Version of Record online: 25 FEB 2014 | DOI: 10.1002/smll.201303182

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      A new solution-processing method, termed as two-phase dip-coating, is proposed for the alignment of organic semiconductors, with the assistance of a surfactant. The resultant ultrathin aligned microstripes for both n- and p-type conjugated molecules show an electron mobility of 0.12 cm2 V-1 s-1 and a hole mobility of 0.16 cm2 V-1 s-1, respectively.

    7. Zeolitic Imidazolate Framework 67-Derived High Symmetric Porous Co3O4 Hollow Dodecahedra with Highly Enhanced Lithium Storage Capability (pages 1932–1938)

      Renbing Wu, Xukun Qian, Xianhong Rui, Hai Liu, Boluo Yadian, Kun Zhou, Jun Wei, Qingyu Yan, Xi-Qiao Feng, Yi Long, Liuying Wang and Yizhong Huang

      Version of Record online: 25 FEB 2014 | DOI: 10.1002/smll.201303520

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      High symmetric porous Co3O4 hollow dodecahedra constructed by nanometer-sized building blocks are rationally synthesized by templating against Co-containing zeolitic imidazolate framework-67. The well-defined hollow structure and highly porous framework render these hollow dodecahedra exhibit high specific capacity, excellent cycling stability and superior rate capability when evaluated as an anode material for lithium-ion batteries.

    8. Cross-Linked, Self-Fluorescent Gold Nanoparticle/Polypeptide Nanocapsules Comprising Dityrosine for Protein Encapsulation and Label-Free Imaging (pages 1939–1944)

      Yi-Fong Huang, Sheing-Chung Lu, Yun-Chiao Huang and Jeng-Shiung Jan

      Version of Record online: 27 FEB 2014 | DOI: 10.1002/smll.201303462

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      Cross-linked, self-fluorescent Au nanoparticle/polypeptide nanocapsules comprising dityrosine are prepared by the self-assembly of the random copolypeptides comprising L-lysine and L-tyrosine upon subsequent cross-linking of tyrosine residues by chloroaurate reduction. These nanocapsules are demonstrated be useful as encapsulants for protein encapsulation and as optical probes for label-free cell imaging. The reduction process is so mild that the protein can still retain its function.

    9. Room Temperature Magnetic Graphene Oxide- Iron Oxide Nanocomposite Based Magnetoresistive Random Access Memory Devices via Spin-Dependent Trapping of Electrons (pages 1945–1952)

      Aigu L. Lin, Haiyang Peng, Zhiqi Liu, Tom Wu, Chenliang Su, Kian Ping Loh, Ariando, Wei Chen and Andrew T.S. Wee

      Version of Record online: 28 FEB 2014 | DOI: 10.1002/smll.201302986

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      A MRAM device is fabricated using magnetic graphene oxide- iron oxide nanoparticles nanocomposites together with a platinum electrode and a ferromagnetic cobalt electrode. The device allow for a positive magnetoresistance up to 280% via the spin-dependent trapping of charge carriers. Its low resistance state can be restored by releasing the trapped charges by reversing the direction of current flow together with the magnetic field orientation.

    10. Artificial Bacterial Flagella for Remote-Controlled Targeted Single-Cell Drug Delivery (pages 1953–1957)

      Rami Mhanna, Famin Qiu, Li Zhang, Yun Ding, Kaori Sugihara, Marcy Zenobi-Wong and Bradley J. Nelson

      Version of Record online: 10 MAR 2014 | DOI: 10.1002/smll.201303538

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      An approach for batch preparation of liposome-functionalized microdevices is demonstrated for remotely controlled single-cell drug delivery. The liposome functionalized artificial bacterial flagella exhibit corkscrew swimming in 3D with micrometer positioning precision by applying an external rotating magnetic field. The devices are also capable of delivering water-soluble drugs to single cells in vitro.

  9. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Concepts
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Full Papers
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      Plasmonic Nanoantennas: Lateral Magnetic Near-Field Imaging of Plasmonic Nanoantennas With Increasing Complexity (Small 10/2014) (page 1958)

      Denitza Denkova, Niels Verellen, Alejandro V. Silhanek, Pol Van Dorpe and Victor V. Moshchalkov

      Version of Record online: 20 MAY 2014 | DOI: 10.1002/smll.201470060

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      Imaging the magnetic field of light, important, for example, in metamaterials studies, only recently became possible. D. Denkova, V. V. Moshchalkov, and co-workers image the lateral magnetic near-field distributions of different plasmonic antennas by aperture near-field microscopy. The results, presented on page 1959, contribute to the development of novel plasmonic metamaterials.

  10. Full Papers

    1. Top of page
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    1. Lateral Magnetic Near-Field Imaging of Plasmonic Nanoantennas With Increasing Complexity (pages 1959–1966)

      Denitza Denkova, Niels Verellen, Alejandro V. Silhanek, Pol Van Dorpe and Victor V. Moshchalkov

      Version of Record online: 3 MAR 2014 | DOI: 10.1002/smll.201302926

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      Direct experimental maps of the lateral magnetic near-field distributions of different plasmonic nanoantennas are obtained by hollow-pyramid aperture scanning near-field optical microscopy. Both simple plasmonic nanoresonators (bars, disks, rings) and more complex structures are investigated. The magnetic near-field distributions of the studied complex resonators are found to be a superposition of the magnetic near-fields of the individual constituting elements.

    2. Tumor-Responsive Fluorescent Light-up Probe Based on a Gold Nanoparticle/Conjugated Polyelectrolyte Hybrid (pages 1967–1975)

      Youyong Yuan, Dan Ding, Kai Li, Jie Liu and Bin Liu

      Version of Record online: 10 MAR 2014 | DOI: 10.1002/smll.201302765

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      A fluorescent light-up nanoprobe based on gold nanoparticles (AuNPs) and polyelectrolyte is prepared through sequentially coating of Au NPs with a pH-responsive charge-reversible polymer and a cationic conjugated polyelectrolyte (CPE). This obtained nanoprobe shows a light-up response to the low pH extracellular (pHe) microenvironments in tumors, and can be used for in vitro and in vivo tumor imaging with high contrast.

    3. Non-Volatile Ferroelectric Memory with Position-Addressable Polymer Semiconducting Nanowire (pages 1976–1984)

      Sun Kak Hwang, Sung-Yong Min, Insung Bae, Suk Man Cho, Kang Lib Kim, Tae-Woo Lee and Cheolmin Park

      Version of Record online: 18 MAR 2014 | DOI: 10.1002/smll.201303814

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      Polymer NW-based flexible Fe-FET memory is realized with a position-addressable polymer semiconducting NW and a ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) gate insulator. The devices with a carefully controlled NW/PVDF-TrFE interface exhibit non-volatile ON/OFF current margins of approximately 102 with time-dependent data retention and read/write endurance of more than 104 s and 102 cycles, respectively.

    4. Observation of Fano Resonances in All-Dielectric Nanoparticle Oligomers (pages 1985–1990)

      Katie E. Chong, Ben Hopkins, Isabelle Staude, Andrey E. Miroshnichenko, Jason Dominguez, Manuel Decker, Dragomir N. Neshev, Igal Brener and Yuri S. Kivshar

      Version of Record online: 25 FEB 2014 | DOI: 10.1002/smll.201303612

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      Optically induced magnetic Fano resonances in all-dielectric nanoparticle oligomers are experimentally observed in arrays of heptamer structures composed of silicon nanodisks. Their measured linear-optical extinction spectra reveal pronounced Fano resonances associated with the strong magnetic response of high-refractive index all-dielectric nanoparticles. The resonance can be tuned by varying the diameter of the central nanodisk.

    5. Localization and Dynamics of Glucocorticoid Receptor at the Plasma Membrane of Activated Mast Cells (pages 1991–1998)

      Emmanuel Oppong, Per Niklas Hedde, Sylwia Sekula-Neuner, Linxiao Yang, Falko Brinkmann, René M. Dörlich, Michael Hirtz, Harald Fuchs, Gerd Ulrich Nienhaus and Andrew C. B. Cato

      Version of Record online: 25 FEB 2014 | DOI: 10.1002/smll.201303677

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      The glucocorticoid receptor (GR) rapidly modulates signaling cascades in mast cells following crosslinking of IgE receptor (FcεRI). Using total internal reflection fluorescence microscopy for live cell imaging in combination with allergenic arrays deposited on a glass slide by dip-pen nanolithography, the localization and dynamics of GR-GFP have been demonstrated at the plasma membrane at the IgE-FcεRI interaction point.

    6. N-Doped Graphene Field-Effect Transistors with Enhanced Electron Mobility and Air-Stability (pages 1999–2005)

      Wentao Xu, Tae-Seok Lim, Hong-Kyu Seo, Sung-Yong Min, Himchan Cho, Min-Ho Park, Young-Hoon Kim and Tae-Woo Lee

      Version of Record online: 24 FEB 2014 | DOI: 10.1002/smll.201303768

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      The doping effect of solution-processed N-DMBI molecules on CVD-grown graphene is investigated. The strong n-type doping shifts the Dirac point of graphene to around -140 V. A electron mobility of 1150 cm2 V−1 s−1 is obtained. The doping effect is uniform on a large scale and stable in the air.

    7. Understanding Interactions of Functionalized Nanoparticles with Proteins: A Case Study on Lactate Dehydrogenase (pages 2006–2021)

      Oliver Stueker, Van A. Ortega, Greg G. Goss and Maria Stepanova

      Version of Record online: 3 MAR 2014 | DOI: 10.1002/smll.201303639

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      Using molecular dynamic simulations for single, functionalized nanoparticles in solution and a newly developed method of analysis, Stueker and co-workers describe the effects of binding of a mercapto-undecanoic acid functionalized 4.2 nm gold nanoparticle on the structural and dynamic properties of the biological enzyme LDH. The predictions help to explain the experimentally determined alterations in measured LDH enzyme activity when exposed to these particles.

    8. CMOS-Compatible Silicon Nanowire Field-Effect Transistors for Ultrasensitive and Label-Free MicroRNAs Sensing (pages 2022–2028)

      Na Lu, Anran Gao, Pengfei Dai, Shiping Song, Chunhai Fan, Yuelin Wang and Tie Li

      Version of Record online: 27 FEB 2014 | DOI: 10.1002/smll.201302990

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      miRNA sensors with an ultrahigh sensitivity in the zeptomolar region that are easy to fabricate at very low cost are demonstrated. The CMOS-­compatible SiNW-FETbiosensors show a much improved selectivity and sensitivity for miRNA family members compared to conventional detection methods. These sensors will be crucial in the early diagnosis and prognosis of cancers.

    9. Microfluidic Assembly of Monodisperse Multistage pH-Responsive Polymer/Porous Silicon Composites for Precisely Controlled Multi-Drug Delivery (pages 2029–2038)

      Dongfei Liu, Hongbo Zhang, Bárbara Herranz-Blanco, Ermei Mäkilä, Vesa-Pekka Lehto, Jarno Salonen, Jouni Hirvonen and Hélder A. Santos

      Version of Record online: 25 FEB 2014 | DOI: 10.1002/smll.201303740

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      An advanced drug delivery system (DDS) platform consisting of pH-responsive polymers encapsulating PSi particles is fabricated by the microfluidic technique to form a polymer/PSi microcomposite. The prepared microcomposites show monodisperse size distribution, multistage pH-response, precise ratiometric controlled loading degree towards the simultaneously loading of different drug molecules, and tailored release kinetics of the loaded payloads.

    10. Confined Iron Fluoride@CMK-3 Nanocomposite as an Ultrahigh Rate Capability Cathode for Li-Ion Batteries (pages 2039–2046)

      Bingjiang Li, Naiqing Zhang and Kening Sun

      Version of Record online: 27 FEB 2014 | DOI: 10.1002/smll.201303375

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      A mesoporous FeF3·0.33H2O@CMK-3 nanocomposite is designed via a facile nanocasting technique using CMK-3 as a conductive matrix. By combining confined nanosized FeF3·0.33H2O, high electron conductivity, and open framework, the FeF3·0.33H2O@CMK-3 nanocomposite demonstrates impressive ultrahigh-rate capability (78 mAh g−1 at 50 C) and excellent cycling properties (retaining over 97% of the initial capacity after 140 variational cycles).

    11. ATP-Stabilized Amorphous Calcium Carbonate Nanospheres and Their Application in Protein Adsorption (pages 2047–2056)

      Chao Qi, Ying-Jie Zhu, Bing-Qiang Lu, Xin-Yu Zhao, Jing Zhao, Feng Chen and Jin Wu

      Version of Record online: 28 FEB 2014 | DOI: 10.1002/smll.201302984

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      Highly stable amorphous calcium carbonate (ACC) nanospheres are prepared using ATP biomolecule as the stabilizer in aqueous solution. The as-prepared ACC nanospheres have high protein adsorption capacity and pH responsive protein release property, thus are promising for applications in biomedical fields such as drug delivery and protein adsorption.

    12. One-Step Transfer and Integration of Multifunctionality in CVD Graphene by TiO2/Graphene Oxide Hybrid Layer (pages 2057–2066)

      Hee Jin Jeong, Ho Young Kim, Hyun Jeong, Joong Tark Han, Seung Yol Jeong, Kang-Jun Baeg, Mun Seok Jeong and Geon-Woong Lee

      Version of Record online: 28 FEB 2014 | DOI: 10.1002/smll.201303541

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      One-step graphene transfer and integration into optoelectronic devices is successfully performed by simply introducing TiO2/graphene oxide hybrid structure as a supporting layer for graphene transfer. Thin TiO2 simultaneously acts as a p-type doping layer and a passivation layer as well as a photoactive layer, resulting in enhanced electrical conductivity, environmental stability, and photocatalytic properties of graphene.

    13. Ultraspecific and Highly Sensitive Nucleic Acid Detection by Integrating a DNA Catalytic Network with a Label-Free Microcavity (pages 2067–2076)

      Yuqiang Wu, David Yu Zhang, Peng Yin and Frank Vollmer

      Version of Record online: 28 FEB 2014 | DOI: 10.1002/smll.201303558

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      A DNA network is integrated with a state-of-the art optical biosensor for detection of nucleic acid (22 mers) with unprecedented specificity and sensitivity. This work features the capabilities of DNA nanotechnology combined with highly sensitive optical microcavities for breaking through previous performance limitations.

    14. Automated Fabrication of 2-nm Solid-State Nanopores for Nucleic Acid Analysis (pages 2077–2086)

      Kyle Briggs, Harold Kwok and Vincent Tabard-Cossa

      Version of Record online: 2 MAR 2014 | DOI: 10.1002/smll.201303602

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      Dielectric breakdown in solution can reliably fabricate 2-nm solid-state nanopores in 10-nm silicon nitride membranes with greater than 95% yield. It is shown that these nanopores are capable of distinguishing between single-stranded and double-stranded DNA, as well as being able to investigate the B-S stretching transition in short double-stranded DNA fragments.

    15. Biomolecule-Doped PEDOT with Three-Dimensional Nanostructures as Efficient Catalyst for Oxygen Reduction Reaction (pages 2087–2095)

      Zhaoyan Guo, Huan Liu, Congcong Jiang, Ying Zhu, Meixiang Wan, Liming Dai and Lei Jiang

      Version of Record online: 2 MAR 2014 | DOI: 10.1002/smll.201303642

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      A one-step, self-assembling route is developed to controllably polymerize hemin-doped PEDOT with three-dimensional hierarchical nanostructures, which exhibit excellent catalytic performance comparable to commercial Pt/C electrodes for the oxygen reduction reaction (ORR) with a better stability and free from methanol crossover effects even in neutral media.

    16. Direct Synthesis of MOF-Derived Nanoporous Carbon with Magnetic Co Nanoparticles toward Efficient Water Treatment (pages 2096–2107)

      Nagy L. Torad, Ming Hu, Shinsuke Ishihara, Hiroaki Sukegawa, Alexis A. Belik, Masataka Imura, Katsuhiko Ariga, Yoshio Sakka and Yusuke Yamauchi

      Version of Record online: 7 MAR 2014 | DOI: 10.1002/smll.201302910

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      Nanoporous carbon particles with magnetic Co nanoparticles are synthesized by one-step carbonization of zeolitic imidazolate framework-67 (ZIF-67) crystals. The obtained nanoporous carbons show a high surface area and well-developed graphitized wall, thereby realizing fast molecular diffusion of methylene blue molecules with excellent adsorption performance. Also, the dispersed magnetic Co nanoparticles facilitate easy magnetic separation.

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