Tuning of ZnO 1D nanostructures by atomic layer deposition and electrospinning for optical gas sensor applications

We explored for the first time the ability of a three-dimensional polyacrylonitrile/ZnO material—prepared by a combination of electrospinning and atomic layer deposition (ALD) as a new material with a large surface area—to enhance the performance of optical sensors for volatile organic compound (VOC) detection. The photoluminescence (PL) peak intensity of these one-dimensional nanostructures has been enhanced by a factor of 2000 compared to a flat Si substrate. In addition, a phase transition of the ZnO ALD coating from amorphous to crystalline has been observed due to the properties of a polyacrylonitrile nanofiber template: surface strain, roughness, and an increased number of nucleation sites in comparison with a flat Si substrate. The greatly improved PL performance of these nanostructured surfaces could produce exciting materials for implantation in VOC optical sensor applications.

Roman Viter, Adib Abou Chaaya, Igor Iatsunskyi, Grzegorz Nowaczyk, Kristaps Kovalevskis, Donats Erts, Philippe Miele, Valentyn Smyntyna and Mikhael Bechelany

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Hyaluronic acid-fabricated nanogold delivery of the inhibitor of apoptosis protein-2 siRNAs inhibits benzo[ a ]pyrene-induced oncogenic properties of lung cancer A549 cells

Benzo[ a ]pyrene (BaP), a component of cooking oil fumes (COF), promotes lung cancer cell proliferation and survival via the induction of inhibitor of apoptosis protein-2 (IAP-2) proteins. Thus knockdown of IAP-2 would be a promising way to battle against lung cancer caused by COF. Functionalized gold nanoparticle (AuNP) is an effective delivery system for bio-active materials. Here, biocompatible hyaluronic acid (HA) was fabricated into nanoparticles to increase the target specificity by binding to CD44-over-expressed cancer cells. IAP-2-specific small-interfering RNA (siRNAs) or fluorescein isothiocyanate (FITC) were then incorporated into AuNP-HA. Conjugation of IAP-2 siRNA into AuNPs-HA was verified by the UV–vis spectrometer and Fourier transform infrared spectrometer. Further studies showed that AuNP-HA/FITC were effectively taken up by A549 cells through CD44-mediated endocytosis. Incubation of BaP-challenged cells with AuNP-HA-IAP-2 siRNAs silenced the expression of ...



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Morphology dependent field emission of acid-spun carbon nanotube fibers

Acid spun carbon nanotube (CNT) fibers were investigated for their field emission properties and performance was determined to be dependent on fiber morphology. The fibers were fabricated by wet-spinning of pre-made CNTs. Fiber morphology was controlled by a fabrication method and processing conditions, as well as purity, size, and type of the CNT starting material. The internal fiber structure consisted of CNT fibrils held together by van der Waals forces. Alignment and packing density of the CNTs affects the fiber’s electrical and thermal conductivity. Fibers with similar diameters and differing morphology were compared, and those composed of the most densely packed and well aligned CNTs were the best field emitters as exhibited by a lower turn-on voltage and a larger field enhancement factor. Fibers with higher electrical and thermal conductivity demonstrated higher maximum current before failure and longer lifetimes. A stable emission current at 3 mA was obtained for 10 h at ...

S B Fairchild, J Boeckl, T C Back, J B Ferguson, H Koerner, P T Murray, B Maruyama, M A Lange, M M Cahay, N Behabtu, C C Young, M Pasquali, N P Lockwood, K L Averett, G Gruen and D E Tsentalovich

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Strain-Induced Modification of Optical Selection Rules in Lanthanide-Based Upconverting Nanoparticles

Nano Letters

DOI: 10.1021/nl504738k

Michael D. Wisser, Maverick Chea, Yu Lin, Di M. Wu, Wendy L. Mao, Alberto Salleo and Jennifer A. Dionne

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Real-Time Monitoring of Arsenic Trioxide Release and Delivery by Activatable T1 Imaging

ACS Nano

DOI: 10.1021/nn506640h

Zhenghuan Zhao, Xiaomin Wang, Zongjun Zhang, Hui Zhang, Hanyu Liu, Xianglong Zhu, Hui Li, Xiaoqin Chi, Zhenyu Yin and Jinhao Gao

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Permselective Graphene Oxide Membrane for Highly Stable and Anti-Self-Discharge Lithium–Sulfur Batteries

ACS Nano

DOI: 10.1021/nn507178a

Jia-Qi Huang, Ting-Zhou Zhuang, Qiang Zhang, Hong-Jie Peng, Cheng-Meng Chen and Fei Wei

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Charge Transport at Ti-Doped Hematite (001)/Aqueous Interfaces

Chemistry of Materials

DOI: 10.1021/cm504451j

Shawn Chatman, Carolyn I. Pearce and Kevin M. Rosso

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Homogeneous Nucleation of Predominantly Cubic Ice Confined in Nanoporous Alumina

Nano Letters

DOI: 10.1021/nl504855z

Yasuhito Suzuki, Hatice Duran, Martin Steinhart, Michael Kappl, Hans-Jürgen Butt and George Floudas

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Ionic Liquid-Derived Nitrogen-Enriched Carbon/Sulfur Composite Cathodes with Hierarchical MicrostructureA Step Toward Durable High-Energy and High-Performance Lithium–Sulfur Batteries

Chemistry of Materials

DOI: 10.1021/cm504460p

Artur Schneider, Christoph Weidmann, Christian Suchomski, Heino Sommer, Jürgen Janek and Torsten Brezesinski

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Macroporous Titanate Nanotube/TiO2 Monolith for Fast and Large-Capacity Cation Exchange

Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00184

Kenji Okada, Genki Asakura, Yasuaki Tokudome, Atsushi Nakahira and Masahide Takahashi

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Investigation of the Optical Absorbance, Electronic, and Photocatalytic Properties of (Cu1–xCox)2(OH)PO4 Solid Solutions

The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00013

Xihong Peng, Man Li and Candace K. Chan

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Enhanced Oxygen Reduction Activity and Solid Oxide Fuel Cell Performance with a Nanoparticles-Loaded Cathode

Nano Letters

DOI: 10.1021/nl5043566

Xiaomin Zhang, Li Liu, Zhe Zhao, Baofeng Tu, Dingrong Ou, Daan Cui, Xuming Wei, Xiaobo Chen and Mojie Cheng

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Multifunctional Anticancer Platform for Multimodal Imaging and Visible Light Driven Photodynamic/Photothermal Therapy

Chemistry of Materials

DOI: 10.1021/cm504566f

Ruichan Lv, Chongna Zhong, Rumin Li, Piaoping Yang, Fei He, Shili Gai, Zhiyao Hou, Guixin Yang and Jun Lin

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Synthesis of Organic Pillared MFI Zeolite as Bifunctional Acid–Base Catalyst

Chemistry of Materials

DOI: 10.1021/cm5033833

Baoyu Liu, Chaiyaporn Wattanaprayoon, Su Cheun Oh, Laleh Emdadi and Dongxia Liu

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Use of a Pro-Fibrogenic Mechanism-Based Predictive Toxicological Approach for Tiered Testing and Decision Analysis of Carbonaceous Nanomaterials

ACS Nano

DOI: 10.1021/nn507243w

Xiang Wang, Matthew C. Duch, Nikhita Mansukhani, Zhaoxia Ji, Yu-Pei Liao, Meiying Wang, Haiyuan Zhang, Bingbing Sun, Chong Hyun Chang, Ruibin Li, Sijie Lin, Huan Meng, Tian Xia, Mark C. Hersam and André E. Nel

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Ion Spatial Distributions at the Air– and Vacuum–Aqueous K2CO3 Interfaces

The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00257

Matthew A. Brown, Ming-Tao Lee, Armin Kleibert, Markus Ammann and Javier B. Giorgi

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Synthesis, Structure, and Electron Paramagnetic Resonance Study of a Mixed Valent Metal–Organic Framework Containing Cu2 Paddle-Wheel Units

The Journal of Physical Chemistry C

DOI: 10.1021/jp512629c

Mantas Šimėnas, Merten Kobalz, Matthias Mendt, Pierre Eckold, Harald Krautscheid, Ju̅ras Banys and Andreas Pöppl

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Label-Free Surface-Enhanced Infrared Spectroelectrochemistry Studies the Interaction of Cytochrome c with Cardiolipin-Containing Membranes

The Journal of Physical Chemistry C

DOI: 10.1021/jp507225m

Li Liu, Li Zeng, Lie Wu and Xiue Jiang

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Principles of Chemical Bonding and Band Gap Engineering in Hybrid Organic–Inorganic Halide Perovskites

The Journal of Physical Chemistry C

DOI: 10.1021/jp512420b

Aron Walsh

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Wide-Range Controllable n-Doping of Molybdenum Disulfide (MoS2) through Thermal and Optical Activation

ACS Nano

DOI: 10.1021/acsnano.5b00153

Hyung-Youl Park, Myung-Hoon Lim, Jeaho Jeon, Gwangwe Yoo, Dong-Ho Kang, Sung Kyu Jang, Min Hwan Jeon, Youngbin Lee, Jeong Ho Cho, Geun Young Yeom, Woo-Shik Jung, Jaeho Lee, Seongjun Park, Sungjoo Lee and Jin-Hong Park

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