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Recently Published Articles

  1. Facile and Scalable Synthesis of Novel Spherical Au Nanocluster Assemblies@Polyacrylic Acid/Calcium Phosphate Nanoparticles for Dual-Modal Imaging-Guided Cancer Chemotherapy

    Lu Li, Lingyu Zhang, Tingting Wang, Xiaotong Wu, Hong Ren, Chungang Wang and Zhongmin Su

    Article first published online: 5 MAR 2015 | DOI: 10.1002/smll.201403517

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    A simple, novel, and reproducible synthetic stregety is developed to fabricate multifunctional spherical Au nanoclusters assemblies encapsulated by a polyacylic acid/CaP shell with a large-scale production. The resulting nanoparticles possess a high payload of doxorubicin as synergetic dual pH-sensitive drug delivery vehicles to employ for dual-modal computed tomography and fluorescence imaging-guided liver cancer therapy in vitro and in vivo.

  2. Efficient, Absorption-Powered Artificial Muscles Based on Carbon Nanotube Hybrid Yarns

    Márcio Dias Lima, Mohammad W. Hussain, Geoffrey M. Spinks, Sina Naficy, Daniela Hagenasr, Julia S. Bykova, Derrick Tolly and Ray H. Baughman

    Article first published online: 5 MAR 2015 | DOI: 10.1002/smll.201500424

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    A new type of absorption-powered artificial muscle provides high performance without needing a temperature change. These muscles, comprising coiled carbon nanotube fibers infiltrated with silicone rubber, can contract up to 50% to generate up to 1.2 kJ kg−1. The drive mechanism for actuation is the rubber swelling during exposure to a nonpolar solvent. Theoretical energy efficiency conversion can be as high as 16%.

  3. Macroscopic Carbon Nanotube-based 3D Monoliths

    Ran Du, Qiuchen Zhao, Na Zhang and Jin Zhang

    Article first published online: 4 MAR 2015 | DOI: 10.1002/smll.201403170

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    Carbon nanotube (CNT)-based 3D monoliths are a new kind of CNT-based macroscopic assembly featuring both the exceptional physicochemical properties of CNTs and the unique structures of aerogels, which are important for diverse practical applications. This review provides a comprehensive and systematic overview of the preparation strategies and applications of CNT-based 3D monoliths. Both challenges and opportunities are discussed.

  4. Femtosecond Laser Fabrication of Cavity Microball Lens (CMBL) inside a PMMA Substrate for Super-Wide Angle Imaging

    Chong Zheng, Anming Hu, Kenneth D. Kihm, Qian Ma, Ruozhou Li, Tao Chen and W. W. Duley

    Article first published online: 4 MAR 2015 | DOI: 10.1002/smll.201403419

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    A simple and innovative scheme to fabricate a completely enclosed cavity microball lens inside a polymethyl methacrylate substrate is devised using a femtosecond fiber laser at high repetition rates. The fabricated cavity microball lens turns out to be a highly transparent, crack-free structure with low internal surface roughness, allowing for its use as a high-quality optical component in super-wide angle imaging.

  5. Modulation of Interparticle Distance in Discrete Gold Nanoparticle Dimers and Trimers by DNA Single-Base Pairing

    Yoshitsugu Akiyama, Hiroto Shikagawa, Naoki Kanayama, Tohru Takarada and Mizuo Maeda

    Article first published online: 4 MAR 2015 | DOI: 10.1002/smll.201500045

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    Spontaneous and reversible shrinkage of gold nanoparticle chains modified with double-stranded DNA is achieved in a noncrosslinking manner. Significant reductions of the interparticle distance are observed with transmission electron microscopy. When the terminal single-base mismatch exists at the outermost surface of the nanoparticle, this structural change is strongly suppressed due to the fraying motion of the unpaired nucleobases.

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