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Advanced Materials

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https://www.readbyqxmd.com/read/28225213/a-dual-organic-transistor-based-tactile-perception-system-with-signal-processing-functionality
#1
Yaping Zang, Hongguang Shen, Dazhen Huang, Chong-An Di, Daoben Zhu
Organic-device-based tactile-perception systems can open up new opportunities for the next generation of intelligent products. To meet the critical requirements of artificial perception systems, the efficient construction of organic smart elements with integrated sensing and signal processing functionalities is highly desired, but remains a challenge. This study presents a dual-organic-transistor-based tactile-perception element (DOT-TPE) with biomimetic functionality by the construction of organic synaptic transistors with integrated sensing transistors...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28225207/ultrahigh-carrier-mobility-achieved-in-photoresponsive-hybrid-perovskite-films-via-coupling-with-single-walled-carbon-nanotubes
#2
Feng Li, Hong Wang, Dominik Kufer, Liangliang Liang, Weili Yu, Erkki Alarousu, Chun Ma, Yangyang Li, Zhixiong Liu, Changxu Liu, Nini Wei, Fei Wang, Lang Chen, Omar F Mohammed, Andrea Fratalocchi, Xiaogang Liu, Gerasimos Konstantatos, Tom Wu
Organolead trihalide perovskites have drawn substantial interest for photovoltaic and optoelectronic applications due to their remarkable physical properties and low processing cost. However, perovskite thin films suffer from low carrier mobility as a result of their structural imperfections such as grain boundaries and pinholes, limiting their device performance and application potential. Here we demonstrate a simple and straightforward synthetic strategy based on coupling perovskite films with embedded single-walled carbon nanotubes...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28225176/high-quality-factor-mid-infrared-toroidal-excitation-in-folded-3d-metamaterials
#3
Zhe Liu, Shuo Du, Ajuan Cui, Zhancheng Li, Yuancheng Fan, Shuqi Chen, Wuxia Li, Junjie Li, Changzhi Gu
With unusual electromagnetic radiation properties and great application potentials, optical toroidal moments have received increasing interest in recent years. 3D metamaterials composed of split ring resonators with specific orientations in micro-/nanoscale are a perfect choice for toroidal moment realization in optical frequency considering the excellent magnetic confinement and quality factor, which, unfortunately, are currently beyond the reach of existing micro-/nanofabrication techniques. Here, a 3D toroidal metamaterial operating in mid-infrared region constructed by metal patterns and dielectric frameworks is designed, by which high-quality-factor toroidal resonance is observed experimentally...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28225174/mastering-the-photothermal-effect-in-liquid-crystal-networks-a-general-approach-for-self-sustained-mechanical-oscillators
#4
Anne Helene Gelebart, Ghislaine Vantomme, Bert E W Meijer, Dirk J Broer
Chemical networks and molecular switches dominate the area of research geared toward macroscopic motion of materials. A counter-intuitive approach to create self-sustained oscillation by light irradiation of ordinary photostabilizers in splay-aligned liquid-crystalline networks made from commercial mesogens is developed. Photostabilizers or any molecules that are able to quickly dissipate the absorbed light through heat, by vibrational and/or rotational modes, can reach self-oscillating macroscopic motion where self-shadowing plays a critical role...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28225160/emerging-low-dimensional-materials-for-nonlinear-optics-and-ultrafast-photonics
#5
REVIEW
Xiaofeng Liu, Qiangbing Guo, Jianrong Qiu
Low-dimensional (LD) materials demonstrate intriguing optical properties, which lead to applications in diverse fields, such as photonics, biomedicine and energy. Due to modulation of electronic structure by the reduced structural dimensionality, LD versions of metal, semiconductor and topological insulators (TIs) at the same time bear distinct nonlinear optical (NLO) properties as compared with their bulk counterparts. Their interaction with short pulse laser excitation exhibits a strong nonlinear character manifested by NLO absorption, giving rise to optical limiting or saturated absorption associated with excited state absorption and Pauli blocking in different materials...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28225146/effect-of-the-microstructure-of-the-functional-layers-on-the-efficiency-of-perovskite-solar-cells
#6
REVIEW
Fuzhi Huang, Alexander R Pascoe, Wu-Qiang Wu, Zhiliang Ku, Yong Peng, Jie Zhong, Rachel A Caruso, Yi-Bing Cheng
The efficiencies of the hybrid organic-inorganic perovskite solar cells have been rapidly approaching the benchmarks held by the leading thin-film photovoltaic technologies. Arguably, one of the most important factors leading to this rapid advancement is the ability to manipulate the microstructure of the perovskite layer and the adjacent functional layers within the device. Here, an analysis of the nucleation and growth models relevant to the formation of perovskite films is provided, along with the effect of the perovskite microstructure (grain sizes and voids) on device performance...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224711/ratiometric-photoacoustic-molecular-imaging-for-methylmercury-detection-in-living-subjects
#7
Yi Liu, Sheng Wang, Ying Ma, Jing Lin, Hai-Yan Wang, Yueqing Gu, Xiaoyuan Chen, Peng Huang
Photoacoustic molecular imaging is an emerging and promising diagnostic tool for heavy metal ions detection. Methylmercury (MeHg(+) ) is one of the most potent neurotoxins, which damages the brain and nervous system of human beings through fish consumption. The development of a selective and sensitive method for MeHg(+) detection is highly desirable. In this Communication, we develope a chemoselective photoacoustic sensor (LP-hCy7) composed of the liposome (LP) and MeHg(+) -responsive near-infrared (NIR) cyanine dye (hCy7) for MeHg(+) detection within living subjects, such as zebrafish and mouse...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224685/bubble-sheet-like-interface-design-with-an-ultrastable-solid-electrolyte-layer-for-high-performance-dual-ion-batteries
#8
Panpan Qin, Meng Wang, Na Li, Haili Zhu, Xuan Ding, Yongbing Tang
In this work, a bubble-sheet-like hollow interface design on Al foil anode to improve the cycling stability and rate performance of aluminum anode based dual-ion battery is reported, in which, a carbon-coated hollow aluminum anode is used as both anode materials and current collector. This anode structure can guide the alloying position inside the hollow nanospheres, and also confine the alloy sizes within the hollow nanospheres, resulting in significantly restricted volumetric expansion and ultrastable solid electrolyte interface (SEI)...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224683/confined-amorphous-red-phosphorus-in-mof-derived-n-doped-microporous-carbon-as-a-superior-anode-for-sodium-ion-battery
#9
Weihan Li, Shuhe Hu, Xiangyu Luo, Zhongling Li, Xizhen Sun, Minsi Li, Fanfan Liu, Yan Yu
Red phosphorus (P) has attracted intense attention as promising anode material for high-energy density sodium-ion batteries (NIBs), owing to its high sodium storage theoretical capacity (2595 mAh g(-1) ). Nevertheless, natural insulating property and large volume variation of red P during cycling result in extremely low electrochemical activity, leading to poor electrochemical performance. Herein, the authors demonstrate a rational strategy to improve sodium storage performance of red P by confining nanosized amorphous red P into zeolitic imidazolate framework-8 (ZIF-8) -derived nitrogen-doped microporous carbon matrix (denoted as P@N-MPC)...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28224677/dynamic-nanoparticle-assemblies-for-biomedical-applications
#10
REVIEW
Fangyuan Li, Jingxiong Lu, Xueqian Kong, Taeghwan Hyeon, Daishun Ling
Designed synthesis and assembly of nanoparticles assisted by their surface ligands can create "smart" materials with programmed responses to external stimuli for biomedical applications. These assemblies can be designed to respond either exogenously (for example, to magnetic field, temperature, ultrasound, light, or electric pulses) or endogenously (to pH, enzymatic activity, or redox gradients) and play an increasingly important role in a diverse range of biomedical applications, such as biosensors, drug delivery, molecular imaging, and novel theranostic systems...
February 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221726/how-the-molecular-packing-affects-the-room-temperature-phosphorescence-in-pure-organic-compounds-ingenious-molecular-design-detailed-crystal-analysis-and-rational-theoretical-calculations
#11
Yujun Xie, Yuwei Ge, Qian Peng, Conggang Li, Qianqian Li, Zhen Li
Long-lived phosphorescence at room temperature (RTP) from pure organic molecules is rare. Recent research reveals various crystalline organic molecules can realize RTP with lifetimes extending to the magnitude of second. There is little research on how molecular packing affecting RTP. Three compounds are designed with similar optical properties in solution, but tremendously different solid emission characteristics. By investigating the molecular packing arrangement in single crystals, it is found that the packing style of the compact face to face favors of long phosphorescence lifetime and high photoluminescence efficiency, with the lifetime up to 748 ms observed in the crystal of CPM ((9H-carbazol-9-yl)(phenyl)methanone)...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221715/hybrid-nanoparticle-pyramids-for-intracellular-dual-micrornas-biosensing-and-bioimaging
#12
Si Li, Liguang Xu, Maozhong Sun, Xiaoling Wu, Liqiang Liu, Hua Kuang, Chuanlai Xu
This study strategically fabricates multifunctional nanopyramids to allow the ultrasensitive quantification of dual microRNAs (miR-203(b) and miR-21) in living cells and their responsive bioimaging in vivo. The nanopyramids, composed of Au-Cu9 S5 nanoparticles (NPs), upconversion NPs (UCNPs), and Ag2 S NPs, emit two luminescent signals simultaneously with excitation at 808 nm, arising from the UCNPs at 541 nm in the visible region and from the Ag2 S NPs at 1227 nm in the second window of near-infrared (NIR-II) region...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221714/photonic-devices-out-of-equilibrium-transient-memory-signal-propagation-and-sensing
#13
Thomas Heuser, RĂ©mi Merindol, Sebastian Loescher, Aileen Klaus, Andreas Walther
Soft photonic materials are important for sensors, displays, or energy management and have become switchable under static equilibrium conditions by integration of responsive polymer features. The next step is to equip such materials with the ability for autonomously dynamic and self-regulating behavior, which would advance their functionality and application possibilities to new levels. Here, this study shows the system integration of a nonlinear, biocatalytic pH-feedback system with a pH-responsive block copolymer photonic gel, and demonstrates autonomous transient memories, remotely controlled signal propagation, and sensing...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221713/reconfigurable-microscale-frameworks-from-concatenated-helices-with-controlled-chirality
#14
Seog-Jin Jeon, Ryan C Hayward
The utility of helical structures in driving motion of microorganisms and plants has inspired efforts to develop synthetic stimuli-responsive helical architectures for self-motile and shape-morphing systems. While several approaches to responsive helices based on hydrogels and liquid crystalline polymers have been reported, they have so far been limited to macroscopic (cm scale) dimensions, and have not been applied to concatenated helices with more than two segments. Here, a robust method for microfabrication of helices inspired by Bauhinia seedpods, based on trilayer samples consisting of rigid plastic stripes sandwiching a swellable temperature-responsive hydrogel, is reported and the formation of responsive shape-controlled frameworks from concatenated multiple helices (multihelices) with controlled chirality is demonstrated...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221707/dynamic-covalent-polymer-networks-from-old-chemistry-to-modern-day-innovations
#15
REVIEW
Weike Zou, Jiante Dong, Yingwu Luo, Qian Zhao, Tao Xie
Dynamic covalent polymer networks have long been recognized. With the initial focus on the unintended impact of dynamic covalent linkages on the viscoelasticity of commercial rubbers, efforts in modern times have transitioned into designing dynamic covalent polymer networks with unique adaptive properties. Whereas self-healing and thermoset reprocessing have been the primary motivations for studying dynamic covalent polymer networks, the recent discovery of the vitrimeric rheological behavior and solid-state plasticity for this type of material have opened up new opportunities in material innovations...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221704/in-plane-2h-1t-mote2-homojunctions-synthesized-by-flux-controlled-phase-engineering
#16
Youngdong Yoo, Zachary P DeGregorio, Yang Su, Steven J Koester, James E Johns
The fabrication of in-plane 2H-1T' MoTe2 homojunctions by the flux-controlled, phase-engineering of few-layer MoTe2 from Mo nanoislands is reported. The phase of few-layer MoTe2 is controlled by simply changing Te atomic flux controlled by the temperature of the reaction vessel. Few-layer 2H MoTe2 is formed with high Te flux, while few-layer 1T' MoTe2 is obtained with low Te flux. With medium flux, few-layer in-plane 2H-1T' MoTe2 homojunctions are synthesized. As-synthesized MoTe2 is characterized by Raman spectroscopy and X-ray photoelectron spectroscopy...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221702/localized-and-controlled-delivery-of-nitric-oxide-to-the-conventional-outflow-pathway-via-enzyme-biocatalysis-toward-therapy-for-glaucoma
#17
Rona Chandrawati, Jason Y H Chang, Ester Reina-Torres, Coline Jumeaux, Joseph M Sherwood, W Daniel Stamer, Alexander N Zelikin, Darryl R Overby, Molly M Stevens
Nitric oxide (NO) is able to lower intraocular pressure (IOP); however, its therapeutic effects on outflow physiology are location- and dose-dependent. An NO delivery platform that directly targets the resistance-generating region of the conventional outflow pathway and locally liberates a controlled dose of NO is reported. An increase in outflow facility (decrease in IOP) is demonstrated in a mouse model.
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221007/ionic-colloidal-molding-as-a-biomimetic-scaffolding-strategy-for-uniform-bone-tissue-regeneration
#18
Jian Zhang, Jinpeng Jia, Jimin P Kim, Hong Shen, Fei Yang, Qiang Zhang, Meng Xu, Wenzhi Bi, Xing Wang, Jian Yang, Decheng Wu
Inspired by the highly ordered nanostructure of bone, nanodopant composite biomaterials are gaining special attention for their ability to guide bone tissue regeneration through structural and biological cues. However, bone malformation in orthopedic surgery is a lingering issue, partly due to the high surface energy of traditional nanoparticles contributing to aggregation and inhomogeneity. Recently, carboxyl-functionalized synthetic polymers have been shown to mimic the carboxyl-rich surface motifs of non-collagenous proteins in stabilizing hydroxyapatite and directing intrafibrillar mineralization in-vitro...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28220981/a-highly-durable-transferable-and-substrate-versatile-high-performance-all-polymer-micro-supercapacitor-with-plug-and-play-function
#19
Minshen Zhu, Yang Huang, Yan Huang, Hongfei Li, Zifeng Wang, Zengxia Pei, Qi Xue, Huiyuan Geng, Chunyi Zhi
A highly durable high-performance all-polymer micro-supercapacitor with plug-and-play function is developed. Through the newly developed technology, these micro-supercapacitors can be transferred to any substrate with all functions well retained.
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28220978/a-novel-fabrication-of-3-6-nm-high-graphene-nanochannels-for-ultrafast-ion-transport
#20
Wonsuk Jung, Jangheon Kim, Soohyun Kim, Hyung Gyu Park, Yousung Jung, Chang-Soo Han
In an experiment based on electroosmotic ion transport, 3.6 nm high graphene nanochannels with a clean, smooth and hydrophobic surface and large slip length have 115 times greater ionic conductivity than SiO2 nanochannels.
February 21, 2017: Advanced Materials
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