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ACS Nano

Todd A Stueckle, Donna C Davidson, Ray Derk, Tiffany G Kornberg, Lori Battelli, Sherri Friend, Marlene Orandle, Alixandra Wagner, Cerasela Zoica Dinu, Konstantinos A Sierros, Sushant Agarwal, Rakesh K Gupta, Yon Rojanasakul, Dale W Porter, Liying Rojanasakul
Organomodified nanoclays (ONCs) are increasingly used as filler materials to improve nanocomposite strength, wettability, flammability, and durability. However, pulmonary risks associated with exposure along their chemical lifecycle are unknown. This study's objective was to compare pre- and post-incinerated forms of uncoated and organomodified nanoclays for potential pulmonary inflammation, toxicity, and systemic blood response. Mice were exposed via aspiration to low (30 µg) and high (300 µg) doses of pre-incinerated uncoated montmorillonite nanoclay (CloisNa), ONC (Clois30B), their respective incinerated forms (I-CloisNa and I-Clois30B), and crystalline silica (CS)...
February 16, 2018: ACS Nano
Wei Tang, Zhen Yang, Sheng Wang, Zhantong Wang, Jibin Song, Guocan Yu, Wenpei Fan, Yunlu Dai, Jingjing Wang, Lingling Shan, Gang Niu, Quli Fan, Xiaoyuan Chen
Combination of photoacoustic (PA) and ultrasound (US) imaging offers high spatial resolution images with deep tissue penetration, which shows great potentials in applications in medical imaging. Development of PA/US dual-contrast agents with high contrast and excellent biocompatible is of great interest. Herein, an organic semiconducting photoacoustic nanodroplet, PS-PDI-PAnD, is developed by stabilizing low-boiling-point perfluorocarbon (PFC) droplet with a photoabsorber and photoacoustic agent of perylene diimide (PDI) molecules and co-encapsulating the droplet with photosensitizers of ZnF16Pc molecules...
February 16, 2018: ACS Nano
Nayan P Agarwal, Michael Matthies, Bastian Joffroy, Thorsten L Schmidt
The programmability of DNA enables constructing nanostructures with almost any arbitrary shape, which can be decorated with many functional materials. Moreover, dynamic structures can be realized such as molecular motors and walkers. In this work, we have explored the possibility to synthesize the complementary sequences to single-stranded gap regions in the DNA origami scaffold cost effectively by a DNA polymerase rather than by a DNA synthesizer. For this purpose, four different wireframe DNA origami structures were designed to have single-stranded gap regions...
February 16, 2018: ACS Nano
Papri Chakraborty, Abhijit Nag, Ganesan Paramasivam, Ganapati Natarajan, Thalappil Pradeep
We report the formation of supramolecular adducts between monolayer-protected noble metal nanoclusters and fullerenes, specifically focussing on a well-known silver cluster, [Ag29(BDT)12]3-, where BDT is 1,3-benzene dithiol. We demonstrate that C60 molecules link with the cluster at specific locations and protect the fragile cluster core, enhancing the stability of the cluster. A combination of studies including UV-vis, high-resolution electrospray ionization mass spectrometry (ESI MS), collision-induced dissociation (CID), and nuclear magnetic resonance (NMR) spectroscopy revealed structural details of the fullerene-functionalized clusters, [Ag29(BDT)12(C60)n]3- (n=1-9)...
February 14, 2018: ACS Nano
Jingshu Hui, Srimanta Pakhira, Richa Bhargava, Zachary J Barton, Xuan Zhou, Adam J Chinderle, Jose L Mendoza-Cortes, Joaquín Rodríguez-López
The electronic properties and extreme thinness of graphene make it an attractive platform for exploring electrochemical interactions across dissimilar environments. Here, we report on the systematic tuning of the electrocatalytic activity towards the oxygen reduction reaction (ORR) via heterostructures formed by graphene modified with a metal underlayer and an adlayer consisting of a molecular catalyst. Systematic voltammetric testing and electrochemical imaging of patterned electrodes allowed us to confidently probe modifications on the ORR mechanisms and overpotential...
February 14, 2018: ACS Nano
Yuqiang Liu, Na Sun, Jiawei Liu, Zhen Wen, Xuhui Sun, Shuit-Tong Lee, Baoquan Sun
Solar cells, as promising devices for converting light into electricity, dramatically reduce its performance in rainy day. Here, an energy harvesting structure that integrates a solar cell and a triboelectric nanogenerator (TENG) device is built to realize power generation from both sunlight and raindrop. A heterojunction silicon (Si) solar cell is integrated with a TENG by a mutual electrode of a poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) film. Regarding to the solar cell, imprinted PEDOT:PSS is used to reduce the light reflection, which leads to an enhanced short current density...
February 14, 2018: ACS Nano
Zhihua Lin, Xinjian Fan, Mengmeng Sun, Changyong Gao, Qiang He, Hui Xie
We report a magnetically-actuated, peanut-shaped hematite colloid motor that can not only move in a rolling or wobbling mode in fluids but also perform single-cell manipulation and patterning in a non-contact manner. The peanut motor in the rolling mode can reach a maximal velocity of 10.6 μm s-1 under a rotating magnetic field of 130 Hz and 6.3 mT and can achieve a more precisely controllable motion in predefined tracks. By comparison, the peanut motor in the wobbling mode can reach a maximal velocity of 14...
February 14, 2018: ACS Nano
Hao Jiang, Bozena Kaminska
To enable customized manufacturing of structural colors for commercial applications, up-scalable, low-cost, rapid, and versatile printing techniques are highly demanded. In this paper, we introduce a viable strategy for scaling up production of custom-input images by patterning individual structural colors on separate layers which are then vertically stacked and recombined into full-color images. By applying this strategy on molded-ink-on-nanostructured-surface printing, we present an industry-applicable inkjet structural color printing technique termed as multilayer molded-ink-on-nanostructured-surface (M-MIONS) printing, in which structural color pixels are molded on multiple layers of nanostructured surfaces...
February 14, 2018: ACS Nano
Yinglin Zhu, Kan Zhan, Xu Hou
Nanochannels offer a variety of significant advantages for innovative applications, such as biosensing, filtering, and energy utilization. In this Perspective, we highlight the interface design and applications of nanochannels for energy utilization and discuss further challenges in the development of nanochannels for energy conversion, energy conservation, and energy recovery.
February 14, 2018: ACS Nano
Shantanu Maheshwari, Martin A van der Hoef, Javier Rodríguez-Rodríguez, Detlef Lohse
The stability of two neighbouring surface nanobubbles on a chemically heterogenous surface is studied by Molecular Dynamics (MD) simulations of binary mixtures consisting of Lennard-Jones (LJ) particles. A diffusion equation based stability analysis suggests that two nanobubbles sitting next to each other remain stable, provided the contact line is pinned, and that their radii of curvature are equal. However, many experimental observations seem to suggest some long term kind of ripening or shrinking of the surface nanobubbles...
February 13, 2018: ACS Nano
Jiajing Zhou, Yuyan Jiang, Shuai Hou, Paul Kumar Upputuri, Di Wu, Jingchao Li, Peng Wang, Xu Zhen, Manojit Pramanik, Kanyi Pu, Hongwei Duan
We have developed a class of blackbody materials, i.e., hyperbranched Au plasmonic blackbody (AuPB) of compact sizes (< 50 nm). The AuPB was prepared in a seedless and surfactant-free approach based on the use of mussel-inspired dopamine. Strong intraparticle plasmonic coupling among branches in close proximity leads to intense and uniform broadband absorption across 400-1350 nm. The blackbody absorption imparts the compact AuPB with a superior photothermal efficiency of >80% and closely matched photothermal activity in the first near-infrared (NIR-I) and the second near-infrared (NIR-II) spectral windows, making it a rare broadband theranostic probe for integrated photoacoustic imaging and photothermal therapy (PTT)...
February 13, 2018: ACS Nano
Qingsong Li, Yafeng Zhang, Lei Shi, Huihui Qiu, Suming Zhang, Ning Qi, Jianchen Hu, Wei Yuan, Xiaohua Zhang, Ke-Qin Zhang
Artificial structural colors based on short-range ordered amorphous photonic structures (APSs) have attracted great scientific and industrial interest in recent years. However, the previously reported methods of self-assembling colloidal nanoparticles lack fine control of the APS coating and fixation on substrates, and are hard to realize three-dimensional (3D) conformal coating for objects with irregular or highly curved surfaces. In this paper, atomization deposition of silica colloidal nanoparticles with polyvinyl alcohol as the additive is proposed to solve the above problems...
February 13, 2018: ACS Nano
Yieu Chyan, Ruquan Ye, Yilun Li, Swatantra Pratap Singh, Christopher J Arnusch, James M Tour
A simple and facile method for obtaining patterned graphene under ambient conditions on the surface of diverse materials ranging from renewable precursors such as food, cloth, paper, and cardboard to high-performance polymers like Kevlar or even on natural coal would be highly desirable. Here, we report a method of using multiple pulsed-laser scribing to convert a wide range of substrates into laser-induced graphene (LIG). With the increased versatility of the multiple lase process, highly conductive patterns can be achieved on the surface of a diverse number of substrates in ambient atmosphere...
February 13, 2018: ACS Nano
Xiang Hu, Yan Li, Guang Zeng, Jingchun Jia, Hongbing Zhan, Zhenhai Wen
The exploration of anode materials for lithium ion batteries (LIBs) or sodium ion batteries (SIBs) represents a grand technological challenge to meet the continuously increased demand for high-performance energy storage market. Here we report a facile and reliable synthetic strategy for in situ growth of few-layer MoS2 nanosheets on reduced graphene oxide (rGO) crosslinked hollow carbon spheres (HCS) with forming three dimensional (3D) network nanohybrids (MoS2-rGO/HCS). Systematic electrochemical studies demonstrate, as anode of LIBs, the as-developed MoS2-rGO/HCS can deliver a reversible capacity of 1145 mAh g-1 after 100 cycles at 0...
February 12, 2018: ACS Nano
Govinda Chilkoor, Sushma Priyanka Karanam, Shane Star, Namita Shrestha, Rajesh Kumar Sani, Venkata Krishna Kumar Upadhyayula, Debjit Ghoshal, Nikhil A Koratkar, M Meyyappan, Venkataramana Gadhamshetty
We report the use of a single layer of two-dimensional hexagonal boron nitride (SL-hBN) as the thinnest insulating barrier to microbial corrosion induced by the sulfate-reducing bacteria Desulfovibrio alaskensis G20. We used electrochemical methods to assess the corrosion resistance of SL-hBN on copper against the effects of both the planktonic and sessile forms of the sulfate-reducing bacteria. Cyclic voltammetry results show that SL-hBN-Cu is effective in suppressing corrosion effects of the planktonic cells at potentials as high as 0...
February 12, 2018: ACS Nano
Longtao Ma, Shengmei Chen, Zengxia Pei, Yan Huang, Guojin Liang, Funian Mo, Qi Yang, Jun Su, Yihua Gao, Juan Antonio Zapien, Chunyi Zhi
The exploitation of a high-efficient, low-cost and stable non-noble metal-based catalyst with oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) simultaneously, as air electrode material for rechargeable zinc-air battery is significantly crucial. Meanwhile, the compressible flexibility of a battery is the prerequisite of wearable or/and portable electronics. Herein, we present a strategy via single-site dispersing Fe-Nx species on a two dimensional (2D) highly-graphitic porous nitrogen-doped carbon layer to implement superior catalytic activity toward ORR/OER (with a half-wave potential of 0...
February 12, 2018: ACS Nano
Wei Tian, Han Hu, Yixian Wang, Peng Li, Jingyan Liu, Jialiang Liu, Xiaobo Wang, Xiangdong Xu, Zhongtao Li, Qingshan Zhao, Hui Ning, Wenting Wu, Mingbo Wu
Molybdenum (Mo)-based compounds with properly engineered nanostructure usually possess improved reversible lithium storage capabilities, which offer great promise to boost the performance of lithium-ion batteries (LIBs). Nevertheless, a lack of efficient and high-yield methods for constructing rational nanostructures has largely restricted the application of these potentially important materials. Herein we demonstrate a metal-organic frameworks (MOFs) mediated strategy to successfully synthesize a series of one-dimensional Mo-based/carbon composites with distinct nanostructures...
February 9, 2018: ACS Nano
Jia Yu, Yanlei Wang, Lihui Mou, Daliang Fang, Shimou Chen, Suojiang Zhang
In allusion to traditional transition metal oxide (TMO) anodes for lithium-ion batteries, which face with severe volume variation and poor conductivity, herein a bimetal oxide dual-composite strategy based on 2D-mosaic 3D-gradient design is proposed. Inspired by natural mosaic-dominance phenomena, Zn1-xCoxO/ZnCo2O4 2D-mosaic-hybrid mesoporous ultrathin nanosheets serve as building blocks to assemble into a 3D Zn-Co-gradient hierarchical framework. Moreover, a series of derivative frameworks with highly evolution are controllably synthesized, based on which a facile one-pot synthesis process can be developed...
February 9, 2018: ACS Nano
Qiliang Fu, Farhan Ansari, Qi Zhou, Lars A Berglund
Tremendous efforts have been dedicated to developing effective and eco-friendly approaches for separation of oil-water mixtures. Challenges remain in terms of complex processing, high material cost, low efficiency, and scale-up problems. Inspired by the tubular porosity and hierarchical organization of wood, a strong, mesoporous, and hydrophobic three-dimensional wood structure is created for selective oil/water separation. A delignified wood template with hydrophilic characteristics is obtained by removal of lignin...
February 9, 2018: ACS Nano
Wen Song, Jing Kuang, Chu-Xin Li, Mingkang Zhang, Diwei Zheng, Xuan Zeng, Chuanjun Liu, Xian-Zheng Zhang
Metastasis and recurrence are two unavoidable and intractable problems in cancer therapy, despite of various robust therapeutic approaches. Currently, it seems that immunotherapy is an effective approach to solve the problems, but the high heterogeneity of tumor tissue, inefficient presentation of tumor antigen and deficient targeting ability of therapy usually blunt the efficacy of immunotherapy and hinder its clinical application. Herein, an approach based on combining photodynamic and immunological therapy was designed and developed...
February 8, 2018: ACS Nano
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