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Recently Published Articles

  1. Tumor-Triggered Controlled Drug Release from Electrospun Fibers Using Inorganic Caps for Inhibiting Cancer Relapse

    Xin Zhao, Ziming Yuan, Lara Yildirimer, Jingwen Zhao, Zhi Yuan (William) Lin, Zhi Cao, Guoqing Pan and Wenguo Cui

    Article first published online: 29 MAY 2015 | DOI: 10.1002/smll.201500985

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    A smart, tumor-trigged, controlled drug release using inorganic “caps” with CO32− functional groups in electrospun fibers is presented for inhibiting cancer relapse. When the drug-loaded intelligent electrospun fibers encounter pathological acidic environments, the inorganic gates react with the acids and produce CO2 gas, which enables water penetration into the core of the fibers to induce rapid drug release.

  2. Tailored Height Gradients in Vertical Nanowire Arrays via Mechanical and Electronic Modulation of Metal-Assisted Chemical Etching

    M. A. Otte, V. Solis-Tinoco, P. Prieto, X. Borrisé, L. M. Lechuga, M. U. González and B. Sepulveda

    Article first published online: 28 MAY 2015 | DOI: 10.1002/smll.201500175

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    Based on metal-assisted chemical etching using a catalytic gold layer perforated with nanoholes, it is demonstrated how high aspect-ratio nanostructure arrays with directional height gradients can be accurately tailored by: i) control of mass transport through the nanohole array, ii) mechanical properties of the perforated metal layer, and iii) conductive coupling to the surrounding gold film to accelerate the local electrochemical etching process.

  3. Self-Assembled Epitaxial Core–Shell Nanocrystals with Tunable Magnetic Anisotropy

    Sheng-Chieh Liao, Yong-Lun Chen, Wei-Cheng Kuo, Jeffrey Cheung, Wei-Cheng Wang, Xuan Cheng, Yi-Ying Chin, Yu-Ze Chen, Heng-Jui Liu, Hong-Ji Lin, Chien-Te Chen, Jeng-Yih Juang, Yu-Lun Chueh, Valanoor Nagarajan, Ying-Hao Chu and Chih-Huang Lai

    Article first published online: 28 MAY 2015 | DOI: 10.1002/smll.201500627

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    Epitaxial core–shell CoO–CoFe2O4 nanocrystals are fabricated by using pulsed laser deposition with the aid of melted material (Bi2O3) addition and suitable lattice mismatch provided by substrates (SrTiO3). Well aligned orientations among nanocrystals and reversible core–shell sequence reveal tunable magnetic anisotropy. The interfacial coupling between core and shell further engineers the nanocrystal functionality.

  4. Light or Heat? The Origin of Cargo Release from Nanoimpeller Particles Containing Upconversion Nanocrystals under IR Irradiation

    Juyao Dong and Jeffrey I. Zink

    Article first published online: 28 MAY 2015 | DOI: 10.1002/smll.201500607

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    In upconversion nanocrystal-embedded nanoimpeller particles, whether IR light-stimulated cargo release results from upconverted, light-activated photo­isomerization or from the optical heating-initiated cargo diffusion is thoroughly examined.

  5. Conformational Change of Self-Assembled DNA Nanotubes Induced by Two-Photon Excitation

    Ziwen Dai, Dick Yan Tam, Hailiang Xu, Miu Shan Chan, Ling Sum Liu, Frédéric Bolze, Xiao Hua Sun and Pik Kwan Lo

    Article first published online: 26 MAY 2015 | DOI: 10.1002/smll.201500333

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    Two-photon-regulated, shape-changing DNA nanostructures are demonstrated by integrating a DNA nanotube with a two-photon photocleavable module that enables the opening of the cavities of tube, and becomes partially single-stranded in response to two-photon excitation under 800 nm fs laser pulses.