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ACS Applied Materials & Interfaces

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https://www.readbyqxmd.com/read/30199229/coordination-assisted-polymerization-of-mesoporous-cobalt-sulfide-heteroatom-n-s-doped-double-layered-carbon-tubes-as-an-efficient-bifunctional-oxygen-electrocatalyst
#1
Chencheng Hu, Jin Liu, Juan Wang, Wanxin She, Junwu Xiao, Jiangbo Xi, Zhengwu Bai, Shuai Wang
It is a critical challenge to construct efficient precious-metal-free bifunctional oxygen electrocatalysts for fuel cell and metal-air batteries via structural and component engineering. Herein, a one-dimensional mesoporous double-layered tubular structure, where Co9 S8 nanocrystals are incorporated into nitrogen, sulfur codoped carbon, is successfully synthesized via the coordinated-assisted polymerization and sacrificial template methods. The double-layered tubular structure provides for a large electrochemically active surface area and promotes fast mass transfer...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30199217/facile-synthesis-of-a-terephthalic-acid-based-organic-fluorophore-with-strong-and-color-tunable-emission-in-both-solution-and-solid-states-for-led-applications
#2
Yuan Zhan, Lifeng Lin, Min Chen, Limin Wu
Dual-state emission (DSE) fluorophores with strong photoluminescence in both solution and solid states have wide applications in fluorescent probes and photoelectric devices. However, most of the existing DSE fluorophores involve complex synthetic strategies or only one or two emission colors in the solid state, which may hinder their practical applications. Herein, we report a facile and effective strategy to fabricate a kind of novel adjustable DSE fluorophore TPAA-Cu based on the small molecule terephthalic acid (TPA) and ascorbic acid (AA) with CuCl2 as the catalyst...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30198255/wavelength-tunable-and-highly-stable-perovskite-quantum-dot-doped-lasers-with-liquid-crystal-lasing-cavities
#3
Lin-Jer Chen, Jia-Heng Dai, Jia-De Lin, Ting-Shan Mo, Hong-Ping Lin, Hui-Chen Yeh, Yu-Chou Chuang, Shun-An Jiang, Chia-Rong Lee
This study applies a low-cost solvothermal method to synthesize all-inorganic (lead-free cesium tin halide) perovskite quantum dots (AIPQDs) and to fabricate AIPQD-doped lasers with cholesteric liquid crystal (CLC) lasing cavities. The lasers present highly qualified lasing features of low threshold (150 nJ/pulse) and narrow line width (0.20 nm) that are attributed to the conjunction of the suppression of photoluminescence (PL) loss caused by the quantum confinement of AIPQDs and the amplification of PL caused by the band-edge effect of the CLC-distributed feedback resonator...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30193065/high-throughput-screening-of-mof-adsorbents-and-membranes-for-h-2-purification-and-co-2-capture
#4
Gokay Avci, Sadiye Velioglu, Seda Keskin
Metal organic frameworks (MOFs) have emerged as great adsorbent and membrane candidates for separation of CO2 /H2 mixtures. The main challenge is the existence of thousands of MOFs, which requires computational screening methods to identify the best materials prior to experimental efforts. In this study, we performed high-throughput computational screening of MOFs to examine their adsorbent and membrane performances for CO2 /H2 separation. Grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) simulations were used to compute various adsorbent and membrane performance metrics of 3857 MOFs...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30192506/tissue-plasminogen-activator-porous-magnetic-microrods-for-targeted-thrombolytic-therapy-after-ischemic-stroke
#5
Jiangnan Hu, Shengwei Huang, Lu Zhu, Weijie Huang, Yiping Zhao, Kunlin Jin, Qichuan ZhuGe
Tissue plasminogen activator (tPA) is the only FDA approved thrombolytic drug for acute ischemic stroke but concerns regarding its limitations remain. Here, we developed a new strategy by incorporating tPA into porous magnetic iron oxide (Fe3 O4 )-microrods (tPA-MRs) for targeted thrombolytic therapy in ischemic stroke induced by distal middle cerebral artery occlusion. We showed that intra-arterial injection of tPA-MRs could target the cerebral blood clot in vivo under the guidance of an external magnet, where tPA was subsequently released at the site of embolism...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30192498/immune-adjuvant-targeting-micelles-allow-efficient-dendritic-cell-migration-to-lymph-nodes-for-enhanced-cellular-immunity
#6
Xiqin Yang, Keke Lian, Tingting Meng, Xuan Liu, Jing Miao, Yanan Tan, Hong Yuan, Fuqiang Hu
Cellular immunity is essential for the effectiveness of vaccines against cancer. After capture of vaccines, dendritic cells (DCs) have to migrate to lymph nodes via chemokine receptor type 7 (CCR7). Subsequently, DCs present cytosolic antigens via major histocompatibility complex class I (MHC I) molecules to induce cellular immunity. However, various vaccines fail to induce potent cellular immunity due to insufficient MHC I-restricted antigen presentation and limitations of immune adjuvants. Hence, we constructed novel immune adjuvant targeting micelles (M-COSA) to targeted codeliver antigen ovalbumin (OVA) and plasmid DNA encoding CCR7 (CCR7 pDNA) to the cytosol of DCs, thus promoting DC migration to lymph nodes to boost MHC I-restricted antigen presentation...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30191708/thermal-and-plasmonic-stabilization-of-silver-nanostructures-using-a-bilayer-anchoring-technique
#7
Venkatanarayana P Sandireddy, Krishna P Koirala, Humaira Taz, Ramki Kalyanaraman
In this work, we demonstrate how to suppress the shape instability of silver (Ag) nanotriangular pyramids following high-temperature annealing without a coating or encapsulation, thus producing a more stable optical plasmonic system. Nanosphere lithography (NSL) was used to fabricate large-area arrays of nanotriangular pyramids of Ag on glass substrates. By using a combination of morphology and spectroscopic studies it was found that exposure of this system to high temperatures of 473 K and beyond in air led to a rapid change in nanostructure shape, and thus, the surface area, with a substantial change to the original plasmonic character...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30191705/highly-surface-embossed-polydimethylsiloxane-based-triboelectric-nanogenerators-with-hierarchically-nanostructured-conductive-ni-cu-fabrics
#8
Dasong Choi, Seungmo Yang, Choonghyun Lee, Woojong Kim, Jaeho Kim, Jinpyo Hong
Wearable fabric-based energy harvesters have continued to gain importance for use in portable consumer electronics as an ecofriendly energy source that is independently self-powered by various activities. Herein, we address the output features of highly flexible Ni-Cu fabric-based triboelectric nanogenerators (F-TENG) employing surface-embossed polydimethylsiloxane (SE-PDMS) layers, as a crucial approach for enhancing power generation. Such SE-PDMS configurations were achieved via control of the ZnO nanowire (NW) and nanoflake (NF) frames initially prepared on bare Ni-Cu fabrics by a hydrothermal approach...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30188113/cardiac-stem-cell-patch-integrated-with-microengineered-blood-vessels-promotes-cardiomyocyte-proliferation-and-neovascularization-after-acute-myocardial-infarction
#9
Teng Su, Ke Huang, Michael A Daniele, Michael Taylor Hensley, Ashlyn T Young, Junnan Tang, Tyler A Allen, Adam C Vandergriff, Patrick D Erb, Frances S Ligler, Ke Cheng
Cardiac stem cell (CSC) therapy has shown preclinical and clinical evidence for ischemic heart repair but is limited by low cellular engraftment and survival after transplantation. Previous versions of the cardiac patch strategy improve stem cell engraftment and encourage repair of cardiac tissue. However, cardiac patches that can enhance cardiomyogenesis and angiogenesis at the injured site remain elusive. Therapies that target cardiomyocyte proliferation and new blood vessel formation hold great potential for the protection against acute myocardial infarction (MI)...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30168715/mapping-depletion-of-lubricant-films-on-antibiofouling-wrinkled-slippery-surfaces
#10
Sam Peppou-Chapman, Chiara Neto
Slippery liquid infused porous surfaces (SLIPS) have recently gained a lot of attention because of their wide range of applications. We recently showed that SLIPS with most of their surface depleted of lubricant, as little lubricant as 0.02 ± 0.01 μL cm-1 , were effective against marine biofouling. Characterization of the depletion and configuration of the immobilized liquid layer on SLIPS is crucial to optimizing their performance. Previous attempts at mapping lubricant thickness have been diffraction limited or indirectly measured thickness...
September 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226983/impact-of-film-thickness-on-defects-and-the-graphitization-of-nanothin-carbon-coatings-used-for-metallic-bipolar-plates-in-proton-exchange-membrane-fuel-cells
#11
Peiyun Yi, Di Zhang, Linfa Peng, Xinmin Lai
Metallic bipolar plates (BPPs) are considered promising alternatives to traditional graphite BPPs used in proton exchange membrane fuel cells (PEMFCs). Major auto companies, such as Toyota, GM, Ford, and BMW, are focusing on the development of metallic BPPs. Amorphous carbon (a-C) coating are widely known to be effective at enhancing the performance of metallic BPPs. However, a-C coatings prepared by sputtering are mostly micrometers thick, which can render mass production difficult due to their low deposition rates...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226978/an-intelligent-biomimetic-skin-of-chameleon-with-excellent-performance-of-self-healing-and-electrochromism
#12
Rongzong Zheng, Yi Wang, Chunyang Jia, Zhongquan Wan, Junsheng Luo, Haseeb Ashraf Malik, Xiaolong Weng, Jianliang Xie, Longjiang Deng
Animals like chameleon possess natural capability to adjust their skin color as preventive measure to deter any potential threat and self-healing of damaged skin tissues. Inspired by this, here we present a copolymer film possessing biomimetic properties, which simultaneously integrates the electrochromic triphenylamine and self-healing Diels-Alder groups. The flexible and stretchable copolymer film acts like the natural chameleons skin, which exhibits significant color variation and also possess excellent self-healing properties...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226754/flexible-and-highly-sensitive-resistive-pressure-sensor-based-on-carbonized-crepe-paper-with-corrugated-structure
#13
Sheng Chen, Yijia Song, Feng Xu
Recently, cellulose paper based materials are emerging for applications in wearable "green" electronics due to their earth-abundance, low cost, light weight, flexibility, and sustainability. Herein, for the first time, we develop an almost all cellulose paper based pressure sensor through a facile, cost-effective, scalable, and environment-friendly approach. The screen-printed interdigital electrodes on the flat printing paper and the carbonized crepe paper (CCP) with a good conductivity are integrated into a flexible pressure sensor as substrates and active materials, respectively...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226753/large-area-silver-stibnite-nanoporous-plasmonic-films-for-label-free-biosensing
#14
Kandammathe Valiyaveedu Sreekanth, Weiling Dong, Qingling Ouyang, Sivaramapanicker Sreejith, Mohamed El Kabbash, Chwee Teck Lim, Giuseppe Strangi, Ken-Tye Yong, Robert E Simpson, Ranjan Singh
The development of various plasmonic nanoporous materials have attracted much interest in different areas of research including bioengineering and biosensing because of their large surface area and versatile porous structure. Here, we introduce a novel technique for fabricating silver-stibnite nanoporous plasmonic films. Unlike conventional techniques that are usually used to fabricate nanoporous plasmonic films, we use a room temperature growth method that is wet-chemistry free, which enables wafer-scale fabrication of nanoporous films on flexible substrates...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226749/a2-a1-d-a1-a2-type-non-fullerene-acceptors-with-2-1-1-dicyanomethylene-rhodanine-as-the-terminal-groups-for-poly-3-hexylthiophene-based-organic-solar-cells
#15
Bo Xiao, Ailing Tang, Qianqian Zhang, Gongqiang Li, Xiaochen Wang, Erjun Zhou
2-(1,1-Dicyanomethylene)rhodanine (RCN) is a kind of important electron-deficient building block to construct non-fullerene acceptors (NFAs) and the highest power conversion efficiency (PCE) beyond 12% has been realized by using complicated p-type polymer as donor. However, when paired with the classic p-type polymer of poly(3-hexylthiophene) (P3HT), the photovoltaic performance of RCN-based NFAs was unsatisfied. In this paper, we chose two RCN-containing small molecule acceptors, BT3 and BTA3, with A2-A1-D-A1-A2 skeleton, where benzothiadiazole (BT) and benzotriazole (BTA) were used as bridged A1 segments respectively to modulate their optoelectronic properties...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226742/calcium-phosphate-nanoparticles-as-intrinsic-inorganic-antimicrobials-the-antibacterial-effect
#16
Victoria Wu, Sean Tang, Vuk Uskokovic
Cheap and simple to make, calcium phosphate (CP), thanks to its unusual functional pleiotropy, belongs to the new wave of abundant and naturally accessible nanomaterials applicable as a means to various technological ends. It is used in a number of industries, including the biomedical, but its intrinsic antibacterial activity in the nanoparticle form has not been sufficiently explored to date. In this study we report on this intrinsic antibacterial effect exhibited by two distinct CP phases: an amorphous CP (ACP) and hydroxyapatite (HAp)...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226741/microtubes-with-complex-cross-section-fabricated-by-c-shaped-bessel-laser-beam-for-mimicking-stomata-that-opens-and-closes-rapidly
#17
Deng Pan, Ze Cai, Shengyun Ji, Shengyin Fan, Pengrui Wang, Zhaoxin Lao, Liang Yang, Jincheng Ni, Chaowei Wang, Jiawen Li, Yanlei Hu, Dong Wu, Shaochen Chen, Jiaru Chu
This article presents a new method for fabricating complex cross-section microtubes with a high aspect ratio at micro/nano scale. The microtubes are directly written in a photoresist using a femtosecond pulsed laser combined with Spatial Light Modulator (SLM). A new method for generating C-shaped Bessel beam by modifying the Bessel beams with a SLM is firstly reported. Using this gap-ring shaped light field, microtubes with special cross-section (trefoil-shaped, clover-shaped, spiral, etc) have been firstly achieved through two-photo polymerization rapidly...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226740/smart-piezo-responsive-pvdf-pmma-surface-with-triggerable-water-oil-wettability-and-adhesion
#18
Olga Guselnikova, Roman Elashnikov, Pavel S Postnikov, Vaclav Svorcik, Oleksiy Lyutakov
Design of the smart surfaces with externally triggerable water/oil wettability and adhesion represents one of the most up-to-date challenges in the field of material science. In this work, the intelligent surface with electrically triggerable wettability and water/oil adhesion is presented. As a basic material background exhibiting electric field (EF) sensitivity, the piezo-responsive polymethylmethacrylate/polyvinylidenefluoride polymers fibers were used. To expand the available range of water/oil contact angles (CA) and adhesion, the fibers were grafted with hydrophilic or hydrophobic functional groups using diazonium chemistry...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226739/multifunctional-supramolecular-materials-constructed-from-polypyrrole-uio-66-nanohybrids-and-pillararene-nanovalves-for-targeted-chemo-photothermal-therapy
#19
Ming-Xue Wu, Hong-Jing Yan, Jia Gao, Yan Cheng, Jie Yang, Jia-Rui Wu, Bai-Juan Gong, Haiyuan Zhang, Ying-Wei Yang
Multifunctional supramolecular nanomaterials capable of targeted and multimodal therapy hold great potential to improve the efficiency of cancer therapeutics. Herein, we report a proof-of-concept nanoplatform for effective chemo-photothermal therapy via the integration of folic acid-based active targeting and supramolecular nanovalves-based passive targeting. Inspired by facile surface engineering and designable layer-by-layer assembly concept, we design and synthesize PPy@UiO-66@WP6@PEI-Fa nanoparticles (PUWPFa NPs) to achieve efficient synergistic chemo-photothermal therapy taking advantage of the desirable photothermal conversion capability of polypyrrole nanoparticles (PPy NPs) and high drug loading capacity of hybrid scaffolds...
September 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30226738/orthogonal-ambipolar-semiconductors-with-inherently-multi-dimensional-responses-for-the-discriminative-sensing-of-chemical-vapors
#20
Weiguo Huang, Ryan C Hayward
Numerous examples of field-effect transistor (FET) biosensors and chemical sensors with good sensitivity and selectivity have now been developed. However, effectively discriminating between analytes has required either the use of receptors that selectively bind specific analytes or the fabrication of an array of sensors with varying but nonspecific responses. Both approaches exhibit significant limitations. In the first case, it can be difficult to design sufficiently specific receptors for many compounds, whereas the number of receptors required scales with the number of analytes to be detected, making it impractical to recognize many different compounds...
September 18, 2018: ACS Applied Materials & Interfaces
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