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Recently Published Articles

  1. Metal Oxide Semiconductors for Dye- and Quantum-Dot-Sensitized Solar Cells

    Isabella Concina and Alberto Vomiero

    Article first published online: 18 DEC 2014 | DOI: 10.1002/smll.201402334

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    This Review provides a brief summary of the most recent research developments in the synthesis and application of nanostructured metal oxide semiconductors for dye-sensitized and quantum dot-sensitized solar cells, and illustrates the critical role of photoanode preparation to boost charge photogeneration and collection, to inhibit charge recombination and to increase photoconversion efficiency in these devices.

  2. Glowing Graphene Quantum Dots and Carbon Dots: Properties, Syntheses, and Biological Applications

    Xin Ting Zheng, Arundithi Ananthanarayanan, Kathy Qian Luo and Peng Chen

    Article first published online: 17 DEC 2014 | DOI: 10.1002/smll.201402648

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    Glowing carbon nanocrystals (graphene quantum dots and carbon dots) are emerging zero-dimensional materials exhibiting unique and tunable photoluminescence, exceptional physicochemical properties, high photostability, biocompatibility, and molecular size. They promise a wide range of novel biological applications including bioimaging, optical biosensing, drug delivery, and theranostics.

  3. Topological Crystalline Insulator Pb1-xSnxSe Nanowires with {100} Facets

    Qisheng Wang, Muhammad Safdar, Zhenxing Wang, Xueying Zhan, Kai Xu, Fengmei Wang and Jun He

    Article first published online: 17 DEC 2014 | DOI: 10.1002/smll.201403159

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    Surface states properties of topological crystalline insulator Pb1-xSnxSe are strongly dependent on crystallographic plane orientation. Rectangular prismatic PbxSn1-xSe nanowires and nanoplates are grown with distinct {100} surfaces on mica sheets. Substrate surface chemical properties are found to be the critical factors that affect the vapor deposition process and final shapes of Pb1-xSnxSe nanostructures.

  4. Improved Optical Sintering Efficiency at the Contacts of Silver Nanowires Encapsulated by a Graphene Layer

    Seung-Bok Yang, HongKyw Choi, Da Som Lee, Choon-Gi Choi, Sung-Yool Choi and Il-Doo Kim

    Article first published online: 17 DEC 2014 | DOI: 10.1002/smll.201402474

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    Optical sintering with intense pulsed light (IPL) offers an effective welding method for silver nanowire (AgNW) junctions. Graphene overlayers coated on AgNWs facilitate the heat transfer from graphene to AgNWs by effectively absorbing IPL energy, resulting in improved sintering efficiency at the contact between Ag wires.

  5. Precisely Tailoring the Stoichiometric Stacking of Perylene-TCNQ Co-Crystals towards Different Nano and Microstructures with Varied Optoelectronic Performances

    Weigang Zhu, Yuanping Yi, Yonggang Zhen and Wenping Hu

    Article first published online: 17 DEC 2014 | DOI: 10.1002/smll.201402330

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    Organic charge-transfer co-crystals with varied donor–acceptor stoichiometric ratios and molecular packing structures are controllably prepared with the morphology of nanowires or microblocks. They have distinct charge transport behavior and photoresponsivity. These interesting results pave the way for rational design and preparation of co-crystals with desired functions.