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ACS Applied Materials & Interfaces

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https://www.readbyqxmd.com/read/28738159/light-and-electrically-induced-phase-segregation-and-its-impact-on-the-stability-of-quadruple-cation-high-bandgap-perovskite-solar-cells
#1
The Duong, Hemant Kumar Mulmudi, Yiliang Wu, Xiao Fu, Heping Shen, Jun Peng, Nandi Wu, Hieu T Nguyen, Daniel MacDonald, Mark N Lockrey, Thomas P White, Klaus Weber, Kylie R Catchpole
Perovskite material with a bandgap of 1.7 eV - 1.8 eV is highly desirable for the top cell in a tandem configuration with a lower bandgap bottom cell, such as a silicon cell. This can be achieved by alloying iodide and bromide anions, but light-induced phase segregation phenomena is often observed in perovskite films of this kind, with implications for solar cell efficiency. Here we investigate light-induced phase segregation inside quadruple cation perovskite material in a complete cell structure, and find that the magnitude of this phenomenon is dependent on the operating condition of the solar cell...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28738156/coherent-random-lasing-from-the-dye-aggregates-in-pdms-thin-film
#2
Lihua Ye, Yangyang Feng, Zhixiang Cheng, Chunlei Wang, Changgui Lu, Yan-Qing Lu, YiPing Cui
The coherent random laser (CRL) from dye doped polydimethylsiloxane (PDMS) has been investigated in both nanoparticles (NPs) doped thin film and pure dye thin film. Compared with the other works, the pump threshold is only 1.5 mJ/cm2 in the pure dye thin film with a low dye concentration. The micro-nano crystals of Pyrromethene 597 (PM597) dye spontaneously formed support both gain and random feedback in the bulk of the PDMS during the sample preparation. When the SiO2 NPs was doped, the pump threshold was reduced to 0...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28738145/giant-blistering-of-nanometer-thick-al2o3-zno-films-grown-by-atomic-layer-deposition-mechanism-and-potential-applications
#3
Hongfei Liu, Shifeng Guo, Ren Bin Yang, Coryl Jing Jun Lee, Lei Zhang
Giant circular blisters of up to 300 μm in diameter and 10 μm in deflection have been produced on nanometer-thick Al2O3-on-ZnO stacks grown by atomic layer deposition at 150 oC followed by annealing at elevated temperatures. Their shape changes upon varied ambient pressures provide evidence that their formation is related to an anneal-induced outgassing combined with their impermeability. The former mainly occurs in the bottom ZnO layer that recrystallizes and releases residual hydroxide ions at elevated temperatures while the latter is dominantly contributed by the pinhole-free Al2O3 layer on top...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737921/investigation-of-mass-produced-substrates-for-reproducible-surface-enhanced-raman-scattering-measurements-over-large-areas
#4
Andreas Reyer, Adrian Prinz, Stefano Giancristofaro, Johannes Schneider, Durval Bertoldo Menezes, Gregor Zickler, Gilles R Bourret, Maurizio E Musso
Surface-enhanced Raman scattering (SERS) is a versatile spectroscopic technique that suffers from reproducibility issues and usually requires complex substrate fabrication processes. In this article, we report the use of a simple mass production technology based on Blu-ray disc manufacturing technology to prepare large area SERS substrates (∼40 mm(2)) with a high degree of homogeneity (±7% variation in Raman signal) and enhancement factor of ∼6 × 10(6). An industrial high throughput injection molding process was used to generate periodic microstructured polymer substrates coated with a thin Ag film...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737897/biogenic-hydroxyapatite-a-new-material-for-the-preservation-and-restoration-of-the-built-environment
#5
Ronald Joseph Turner, Joanna C Renshaw, Andrea Hamilton
Ordinary Portland Cement (OPC) is by weight the world's most produced man-made material, and consequently is used in a variety of applications in environments ranging from buildings, to nuclear wasteforms, and within the human body. In this paper, we present for the first time the direct deposition of biogenic hydroxyapatite onto the surface of OPC, in a synergistic process which relies upon the unique properties of the cement substrate. The synthesised hydroxyapatite is very similar to that found in nature; having a crystallite size, iron and carbonate substitution, and a semi-crystalline structure which identify that this biogenic hydroxyapatite is akin to that found in natural bone and tooth enamel...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737893/uncondensed-graphitic-carbon-nitride-on-reduced-graphene-oxide-for-oxygen-sensing-via-a-photoredox-mechanism
#6
James E Ellis, Dan C Sorescu, Seth C Burkert, David L White, Alexander Star
Melon, a polymeric, uncondensed graphitic carbon nitride with a two-dimensional structure has been coupled with reduced graphene oxide (rGO) to create an oxygen chemiresistor sensor that is active under UV photoactivation. Oxygen gas is an important sensor target in a variety of areas including industrial safety, combustion process monitoring, as well as environmental and biomedical fields. Due to the intimate electrical interface formed between melon and rGO, charge transfer of photoexcited electrons occurs between the two materials when under UV (λ=365 nm) irradiation...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737886/ex-vivo-rat-eye-model-for-investigating-transport-of-next-generation-precision-polyester-nanosystems-p2ns
#7
Raghu Ganugula, Meenakshi Arora, Majeti N V Ravi Kumar
We present for the first time a robust ex vivo rat eye model for investigating the transport of precision polyester nanosystems (P2Ns) across the blood-retinal barrier, intended for systemic administration. The P2Ns-GA actively transport exploiting transferrin receptors present in the inner retinal barrier and co-localize in ganglion cells. Such delivery approaches have the potential to deliver drugs to posterior segments of the eye, which is still a major challenge in treating posterior ocular disorders.
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737377/carbon-dot-based-naphthalimide-coupled-fret-pair-for-highly-selective-ratiometric-detection-of-thioredoxin-reductase-and-cancer-screening
#8
Jagpreet Singh Sidhu, Ashutosh Singh, Neha Garg, Narinder Singh
The Fluorescence resonance energy transfer (FRET) mechanism has been established between the carbon dots (CDs) and naphthalimide to monitor the activity of thioredoxin reductase (TrxR), which is often overexpressed in many cancer cells. The naphthalimide moiety was covalently attached to the surface of CDs through a disulfide linkage. In the normal cell conditions (when devoid of high concentrations of TrxR), the CDs act as an energy donor and naphthalimide acts as an acceptor, which establishes the FRET pair as interpreted from the emission at λem =565 nm, when excited at λex =360 nm...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737375/matrix-assisted-3d-printing-of-cellulose-nanofibers-for-paper-microfluidics
#9
Sungchul Shin, Jinho Hyun
Cellulose nanofiber (CNF), one of the most attractive green bioresources, was adopted for construction of microfluidic devices using matrix-assisted 3D printing. CNF hydrogels can support structures printed using CAD design in a 3D hydrogel environment with the appropriate combination of rheological properties between the CNF hydrogel and ink materials. Amazingly, the structure printed freely in bulky CNF hydrogels was able to retain its highly resolved 3D features in an ultrathin 2D paper using a simple drying process...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737373/construction-of-a-multi-cage-based-mof-with-a-unique-network-for-e%C3%AF-cient-co2-capture
#10
Mei-Hui Yu, Ping Zhang, Rui Feng, Zhao-Quan Yao, Yi-Chen Yu, Tong-Liang Hu, Xian-He Bu
As a kind of MOFs, cage-based MOFs usually carry large voids and small windows, which are advantageous to the storage of small molecules that remain kinetically trapped inside the cages (confinement effect). By adjusting the size of windows via reticular synthesis, the cage-based MOFs can selectively capture and separate the suitable size molecules. Here, considering angle-directed and face-directed strategies, a novel multi-cage-based MOF NUM-3 with a new (3,4,5)-connected topology was successfully constructed in the mixed-ligands assembly...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737372/facile-synthesis-of-different-morphologies-cu2sns3-for-high-performance-supercapacitors
#11
Chao Wang, Hanqing Tian, Jing Jiang, Ting Zhou, Qing Zeng, XinRui He, Pei Huang, Yan Yao
Cu2SnS3 is considered as an emerging potential candidate for electrode materials due to considerable interlayer spaces and tunnels in its crystal structures and excellent conducting ability. Ternary Cu2SnS3 as anode in lithium ion batteries has already been reported, but it is rarely mentioned to be applied in supercapacitors which is considered to be a complementary energy storage device for lithium ion batteries. It is an effective method to improve the electrochemical performance of materials by adjusting the morphology and microstructure of materials...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737037/polyimide-aerogels-using-tri-isocyanate-as-cross-linker
#12
Baochau N Nguyen, Mary Ann Babin Meador, Daniel A Scheiman, Linda S McCorkle
Cross-linked polyimide (PI) aerogels are highly porous, lightweight materials with low thermal conductivity and low dielectric constant. Depending on the backbone chemistry, the cross-linked polyimide aerogels can be molded into various size and shape or cast into flexible, thin film. They are excellent candidates for many applications including antenna-based substrate, thermal insulation for space suits or inflatable structures for entry, descent and landing, or industrial pipelines, protective clothing or building and construction...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28737032/multilayer-snsb4-sbse-thin-films-for-phase-change-materials-of-ultrafast-phase-change-speed-and-enhanced-stability
#13
Ruirui Liu, Xiao Zhou, JiWei Zhai, Jun Song, Pengzhi Wu, Tianshu Lai, Sannian Song, Zhitang Song
The multilayer thin film, comprising of two different phase change material (PCM) components alternatively deposited, provides an effective means to tune and leverage good properties of its components, promising a new route towards high-performance PCMs. The present study systematically investigated the SnSb4-SbSe multilayer thin film as a potential PCM, combining experiments and first-principles calculations, and demonstrated that these multilayer thin films exhibit good electrical resistivity, robust thermal stability and superior phase change speed...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28700216/accelerated-lifetime-testing-of-organic-inorganic-perovskite-solar-cells-encapsulated-by-polyisobutylene
#14
Lei Shi, Trevor L Young, Jincheol Kim, Yun Sheng, Lei Wang, Yifeng Chen, Zhiqiang Feng, Mark J Keevers, Xiaojing Hao, Pierre J Verlinden, Martin A Green, Anita W Y Ho-Baillie
Metal halide perovskite solar cells (PSCs) have undergone rapid progress. However, unstable performance caused by sensitivity to environmental moisture and high temperature is a major impediment to commercialization of PSCs. In the present work, a low-temperature, glass-glass encapsulation technique using high performance polyisobutylene (PIB) as the moisture barrier is investigated on planar glass/FTO/TiO2/FAPbI3/PTAA/gold perovskite solar cells. PIB was applied as either an edge seal or blanket layer. Electrical connections to the encapsulated PSCs were provided by either the FTO or Au layers...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28697306/trackable-mitochondria-targeting-nanomicellar-loaded-with-doxorubicin-for-overcoming-drug-resistance
#15
Ye Zhang, Congjun Zhang, Jing Chen, Li Liu, Mengyue Hu, Jun Li, Hong Bi
Multidrug resistance (MDR) has been recognized as a major obstacle to successful chemotherapy for cancer in the clinic. In recent years, more and more nanoscaled drug delivery systems (DDS) are constructed to modulate drug efflux protein (P-gp) and deliver chemotherapeutic drugs for overcoming MDR. Among them, d-α-tocopheryl polyethylene glycol succinate (TPGS) has been widely used as a drug carrier due to its capability of inhibiting overexpression of P-gp and good amphiphilicity favorable for improving permeation and long-circulation property of DDS...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28696100/thermosensitive-liposomal-codelivery-of-hsa-paclitaxel-and-hsa-ellagic-acid-complexes-for-enhanced-drug-perfusion-and-efficacy-against-pancreatic-cancer
#16
Yan Wei, Yuxi Wang, Dengning Xia, Shiyan Guo, Feng Wang, Xinxin Zhang, Yong Gan
Fibrotic stroma and tumor-promoting pancreatic stellate cells (PSCs), critical characters in the pancreatic ductal adenocarcinoma (PDA) microenvironment, promote a tumor-facilitating environment that simultaneously prevents drug penetration into tumor foci and stimulates tumor growth. Nab-PTX, a human serum albumin (HSA) nanoparticle of paclitaxel (PTX), indicates enhanced matrix penetration in PDA probably due to its small size in vivo and high affinity of HSA with secreted protein acidic and rich in cysteine (SPARC), overexpressed in the PDA stroma...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28696090/wearable-and-washable-conductors-for-active-textiles
#17
Paul Le Floch, Xi Yao, Qihan Liu, Zhengjing Wang, Guodong Nian, Yu Sun, Li Jia, Zhigang Suo
The emergence of stretchable electronics and its potential integration with textiles have highlighted a challenge: Textiles are wearable and washable, but electronic devices are not. Many stretchable conductors have been developed to enable wearable active textiles, but little has been done to make them washable. Here we demonstrate a new class of stretchable conductors that can endure wearing and washing conditions commonly associated with textiles. Such a conductor consists of a hydrogel, a dissolved hygroscopic salt, and a butyl rubber coating...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28692805/stability-scale-up-and-performance-of-quantum-dot-solar-cells-with-carbonate-treated-titanium-oxide-films
#18
P Naresh Kumar, Ankita Kolay, Melepurath Deepa, S M Shivaprasad, Avanish K Srivastava
A novel yet simple approach of carbonate (CBN) treatment of TiO2 films is performed, and quantum dot solar cells (QDSCs) with high power conversion efficiencies (PCEs), reasonably good stabilities, and good fill factors (FFs) are fabricated with TiO2-CBN films. The ability of carbonate groups to passivate defects or oxygen vacancies of TiO2 is confirmed from a nominally enhanced band gap, a lowered defect induced fluorescence intensity, an additional Ti-OH signal obtained after carbonate decomposition, and a more capacitive low frequency electrochemical impedance behavior achieved for TiO2-CBN compared to untreated TiO2...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28691793/graphene-roll-wrapped-prussian-blue-nanospheres-as-a-high-performance-binder-free-cathode-for-sodium-ion-batteries
#19
Jiahuan Luo, Shixiong Sun, Jian Peng, Bo Liu, Yangyang Huang, Kun Wang, Qin Zhang, Yuyu Li, Yu Jin, Yi Liu, Yuegang Qiu, Qing Li, Jiantao Han, Yunhui Huang
Sodium iron hexacyanoferrate (Fe-HCF) has been proposed as a promising cathode material for sodium-ion batteries (SIBs) because of its desirable advantages, including high theoretical capacity (∼170 mAh g(-1)), eco-friendliness, and low cost of worldwide rich sodium and iron resources. Nonetheless, its application faces a number of obstacles due to poor electronic conductivity and structural instability. In this work, Fe-HCF nanospheres (NSs) were first synthesized and fabricated by an in situ graphene rolls (GRs) wrapping method, forming a 1D tubular hierarchical structure of Fe-HCF NSs@GRs...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28691792/high-performance-li-se-batteries-enabled-by-selenium-storage-in-bottom-up-synthesized-nitrogen-doped-carbon-scaffolds
#20
Hongling Lv, Renpeng Chen, Xiaoqi Wang, Yi Hu, Yanrong Wang, Tao Chen, Lianbo Ma, Guoyin Zhu, Jia Liang, Zuoxiu Tie, Jie Liu, Zhong Jin
Selenium (Se) has great promise to serve as cathode material for rechargeable batteries because of its good conductivity and high theoretical volumetric energy density comparable to sulfur. Herein, we report the preparation of mesoporous nitrogen-doped carbon scaffolds (NCSs) to restrain selenium for advanced lithium-selenium (Li-Se) batteries. The NCSs synthesized by a bottom-up solution-phase method have graphene-like laminar structure and well-distributed mesopores. The unique architecture of NCSs can severe as conductive framework for encapsulating selenium and polyselenides, and provide sufficient pathways to facilitate ion transport...
July 24, 2017: ACS Applied Materials & Interfaces
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