Read by QxMD icon Read

Advanced Materials

Manuel J L F Rodrigues, Christiano J S de Matos, Yi Wei Ho, Hélder Peixoto, Rafael E P de Oliveira, Hsin-Yu Wu, Antonio H Castro Neto, José Viana-Gomes
Optical frequency conversion via the nonlinear effect of third harmonic generation is shown to be resonantly enhanced in few-layer black phosphorus. This feature is believed to be a consequence of exciton-related resonance, as the enhancement is strongly correlated with the observation of exciton-recombination photoluminescence. Few-layer thicknesses are obtained both via mechanical exfoliation and laser thinning.
October 18, 2016: Advanced Materials
Fan Wang, Shuyan Song, Kai Li, Junqi Li, Jing Pan, Shuang Yao, Xin Ge, Jing Feng, Xiao Wang, Hongjie Zhang
A green and cost-effective method, named the "solid dual-ions-transformation reaction", is reported to achieve the goal of successfully doping S and N into hollow carbon nanotubes. No harmful raw material is needed during the whole synthesis. Importantly, in the catalytic test of chemical reduction of p-nitrophenol by NaBH4 , the as-obtained S,N co-doped hollow carbon nanotubes exhibit ultrahigh catalytic performances.
October 17, 2016: Advanced Materials
Ke Chen, Qin Hu, Tanghao Liu, Lichen Zhao, Deying Luo, Jiang Wu, Yifei Zhang, Wei Zhang, Feng Liu, Thomas P Russell, Rui Zhu, Qihuang Gong
The charge-carrier balance strategy by interface engineering is employed to optimize the charge-carrier transport in inverted planar heterojunction perovskite solar cells. N,N-Dimethylformamide-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and poly(methyl methacrylate)-modified PCBM are utilized as the hole and electron selective contacts, respectively, leading to a high power conversion efficiency of 18.72%.
October 17, 2016: Advanced Materials
Wei-Yu Kong, Guo-An Wu, Kui-Yuan Wang, Teng-Fei Zhang, Yi-Feng Zou, Dan-Dan Wang, Lin-Bao Luo
A deep UV light photodetector is assembled by coating multilayer graphene on beta-gallium oxide (β-Ga2 O3 ) wafer. Optoelectronic analysis reveals that the heterojunction device is virtually blind to light illumination with wavelength longer than 280 nm, but is highly sensitive to 254 nm light with very good stability and reproducibility.
October 17, 2016: Advanced Materials
Yanan Wang, Juan He, Hao Chen, Jiangshan Chen, Ruidong Zhu, Pin Ma, Andrew Towers, Yuan Lin, Andre J Gesquiere, Shin-Tson Wu, Yajie Dong
A simple yet general swelling-deswelling microencapsulation strategy has been developed to achieve well dispersed and intimately passivated crystalline organic-inorganic perovskites nanoparticles within polymer matrixes and results in a series of highly luminescent CH3 NH3 PbBr3 (MAPbBr3 )-polymer composite films with unprecedented water and thermal stabilities and superior color purity.
October 17, 2016: Advanced Materials
Jongha Lee, Byeongjun Yoo, Hakyong Lee, Gi Doo Cha, Hee-Su Lee, Youngho Cho, Sang Yeon Kim, Hyunseon Seo, Woongchan Lee, Donghee Son, Myungjoo Kang, Hyung Min Kim, Yong Il Park, Taeghwan Hyeon, Dae-Hyeong Kim
Multi-dye-sensitized upconverting nanoparticles (UCNPs), which harvest photons of wide wavelength range (450-975 nm) are designed and synthesized. The UCNPs embedded in photo-acid generating layer are integrated on destructible nonvolatile resistive memory device. Upon illumination of the light, the system permanently erases stored data, achieving enhanced information security.
October 17, 2016: Advanced Materials
Chuanrui Chen, Fangzhi Mou, Leilei Xu, Shaofei Wang, Jianguo Guan, Zunpeng Feng, Quanwei Wang, Lei Kong, Wei Li, Joseph Wang, Qingjie Zhang
Intelligent photoresponsive isotropic semiconductor micromotors are developed by taking advantage of the limited penetration depth of light to induce asymmetrical surface chemical reactions. Independent of the Brownian motion of themselves, the as-proposed isotropic micromotors are able to continuously move with both motion direction and speed just controlled by light, as well as precisely manipulate particles for nanoengineering.
October 17, 2016: Advanced Materials
Feifan Yu, Qianwen Liu, Xin Gan, Mingxiang Hu, Tianyi Zhang, Cheng Li, Feiyu Kang, Mauricio Terrones, Ruitao Lv
Ultrasensitive pressure sensors are constructed with few-layer MoS2 films. As-designed Fabry-Perot (F-P) sensors exhibit nearly synchronous pressure-deflection responses with a very high sensitivity (89.3 nm Pa(-1) ), which is three orders of magnitude higher than those of conventional diaphragm materials (e.g., silica, silver films). This kind of F-P sensor may open up new avenues for 2D materials in biomedical and environmental applications.
October 17, 2016: Advanced Materials
Nitant Gupta, Vasilii I Artyukhov, Evgeni S Penev, Boris I Yakobson
D-loops, a new type of structural defect in carbon fibers, are presented, which have highly detrimental effect on their mechanical properties and can define a new fundamental upper limit to their strength. These defects form exclusively during polyacrylonitrile carbonization, act as stress concentrators in the graphitic basal plane, and cannot be removed by local annealing.
October 17, 2016: Advanced Materials
Giulia Guidetti, Siham Atifi, Silvia Vignolini, Wadood Y Hamad
The fabrication of self-assembled cellulose nanocrystal (CNC) films of tunable photonic and mechanical properties using a facile, green approach is demonstrated. The combination of tunable flexibility and iridescence can dramatically expand CNC coating and film barrier capabilities for paints and coating applications, sustainable consumer packaging products, as well as effective templates for photonic and optoelectronic materials and structures.
October 17, 2016: Advanced Materials
Bert Conings, Aslihan Babayigit, Matthew T Klug, Sai Bai, Nicolas Gauquelin, Nobuya Sakai, Jacob Tse-Wei Wang, Johan Verbeeck, Hans-Gerd Boyen, Henry J Snaith
A robust and expedient gas quenching method is developed for the solution deposition of hybrid perovskite thin films. The method offers a reliable standard practice for the fabrication of a non-exhaustive variety of perovskites exhibiting excellent film morphology and commensurate high performance in both regular and inverted structured solar cell architectures.
October 17, 2016: Advanced Materials
Sen Liu, Nianduan Lu, Xiaolong Zhao, Hui Xu, Writam Banerjee, Hangbing Lv, Shibing Long, Qingjiang Li, Qi Liu, Ming Liu
Negative-SET behavior is observed in various cation-based memories, which degrades the device reliability. Transmission electron microscopy results demonstrate the behavior is caused by the overgrowth of the conductive filament (CF) into the Pt electrode. The CF overgrowth phenomenon is suppressed and the negative-SET behavior is eliminated by inserting an impermeable graphene layer. The graphene-based devices show high reliability and satisfying performance.
October 17, 2016: Advanced Materials
Zhaoke Zheng, Yun Hau Ng, Da-Wei Wang, Rose Amal
Au-Ni core-shell nanorods (NRs) and Au-Pt-Ni core-sandwich-shell NRs are synthesized and exhibit high activity for selective H2 O2 production via direct oxygen reduction. The epitaxial growth with coherent lattice fringes allow for the tuning of the oxygen reduction pathway. Moreover, a selectivity of 95% and mass activity of 192.9 A g(-1)noble metal are achieved using Au-Pt-Ni NRs at 150 mV overpotential.
October 17, 2016: Advanced Materials
Yanglei Xu, Xin Sui, Jiaqiao Jiang, Jin Zhai, Longcheng Gao
A CO-regulated ion nanochannel is demonstrated, which is inspired by the living activity of CO-induced smooth muscle vasodilation. The mechanism relies on the fact that CO has a higher affinity with ferroporphyrin compared to carboxyl groups on the surface of the nanochannels. The cooperation effect of the released carboxyl groups and the conical asymmetric shape leads the ion transportation to be diode-like.
October 17, 2016: Advanced Materials
Hendrik Hähl, Jose Nabor Vargas, Alessandra Griffo, Päivi Laaksonen, Géza Szilvay, Michael Lienemann, Karin Jacobs, Ralf Seemann, Jean-Baptiste Fleury
Pure protein bilayers and vesicles are formed using the native, fungal hydrophobin HFBI. Bilayers with hydrophobic (red) and hydrophilic (blue) core are produced and, depending on the type of core, vesicles in water, oily media, and even in air can be created using microfluidic jetting. Vesicles in water are even able to incorporate functional gramicidin A pores.
October 14, 2016: Advanced Materials
Ian E Jacobs, Erik W Aasen, Derek Nowak, Jun Li, William Morrison, John D Roehling, Matthew P Augustine, Adam J Moulé
Doping-induced solubility control is a patterning technique for semiconducting polymers, which utilizes the reduction in polymer solubility upon p-type doping to provide direct, optical control of film topography and doping level. In situ direct-write patterning and imaging are demonstrated, revealing sub-diffraction-limited topographic features. Photoinduced force microscopy shows that doping level can be optically modulated with similar resolution.
October 14, 2016: Advanced Materials
Jianping Shi, Rui Tong, Xiebo Zhou, Yue Gong, Zhepeng Zhang, Qingqing Ji, Yu Zhang, Qiyi Fang, Lin Gu, Xina Wang, Zhongfan Liu, Yanfeng Zhang
A growth-temperature-mediated two-step chemical vapor deposition strategy is designed to synthesize MoS2 /WS2 and WS2 /MoS2 stacks on Au foils. Predominantly A-A stacked MoS2 /WS2 and A-B stacked WS2 /MoS2 are selectively achieved and confirmed. Relative enhancements or reductions in photocatalytic activities of MoS2 /WS2 or WS2 /MoS2 are observed under illumination, because the type-II band alignment enables directional electron flow from electrode to active site.
October 14, 2016: Advanced Materials
Younseon Wang, Joseph P Park, Sang Hyeon Hong, Haeshin Lee
A new insect-cuticle- and fruit-browning-mimetic film exhibiting simultaneous self-healing and self-sealing properties only by ambient oxygen without external stimuli is developed. The film is formed at the liquid/air interface via crosslinking of phenolic compounds and poly(amine) chains. The film can be self-healed over a hundred times under ambient air at room temperature without exogenous materials and stimuli.
October 14, 2016: Advanced Materials
Man-Keung Fung, Yan-Qing Li, Liang-Sheng Liao
A tandem organic light-emitting diode (OLED) is an organic optoelectronic device that has two or more electroluminescence (EL) units connected electrically in series with unique intermediate connectors within the device. Researchers have studied this new OLED architecture with growing interest and have found that the current efficiency of a tandem OLED containing N EL units (N > 1) should be N times that of a conventional OLED containing only a single EL unit. Therefore, this new architecture is potentially useful for constructing high-efficiency, high-luminance, and long-lifetime OLED displays and organic solid-state lighting sources...
October 13, 2016: Advanced Materials
Xiuzhen Yu, Yusuke Tokunaga, Yasujiro Taguchi, Yoshinori Tokura
The emergence of zero-bias bubbles (≈100 nm in diameter) with various Bloch lines and their triangular lattice is revealed in a colossal magnetoresistive material, La1-x Srx MnO3 , by means of Lorentz transmission electron microscopy (LTEM). The magnetization dynamics, and accompanying changes of the topological number of bubbles via the field-driven motion of the Bloch lines, are demonstrated by in situ LTEM observations.
October 13, 2016: Advanced Materials
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"