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ACS Applied Materials & Interfaces

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https://www.readbyqxmd.com/read/29334458/direct-electrochemical-vibrio-dna-sensing-adopting-highly-stable-graphene-flavin-mononucleotide-aqueous-dispersion-modified-interface
#1
Tao Yang, Huaiyin Chen, Zhiwei Qiu, Renzhong Yu, Shizhong Luo, Weihua Li, Kui Jiao
A bio-functionalized graphene nanohybrid was prepared by simultaneously sonicating graphene and riboflavin 5'-monophosphate sodium salt (FMNS). FMNS, as a bio-dispersant, shows an efficient stabilization for obtaining highly dispersed graphene nanosheets in an aqueous solution. Due to the superior dispersion of graphene and the excellent electrochemical redox activity of FMNS, a direct electrochemical DNA sensor was fabricated adopting the inherent electrochemical redox activity of Gr-FMNS. The comparison between using traditional electrochemical indicator ([Fe(CN)6]3-/4-) and using the self-signal of Gr-FMNS was fully conducted to study the DNA sensing performance...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29334456/building-ion-conduction-highways-in-polymeric-electrolytes-by-manipulating-protein-configuration
#2
Xuewei Fu, Chunhui Li, Yu Wang, Lucas Paul Kovatch, Louis Scudiero, Jin Liu, Wei-Hong Zhong
Solid polymer electrolytes play a critical role in the development of safe, flexible and all-solid-state energy storage devices. However, the low ion-conductivity has been the primary challenge impeding them from practical applications. Here, we propose a new biotechnology to fabricate novel protein-ceramic hybrid nanofillers for simultaneously boosting the ionic conductivity, mechanical properties and even adhesion properties of solid polymer electrolytes. This hybrid nanofiller is fabricated by coating ion-conductive soy-proteins onto TiO2 nanoparticles via a controlled denaturation process in appropriate solvent and conditions...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29334219/mussel-inspired-conductive-polymer-binder-for-si-alloy-anode-in-lithium-ion-batteries
#3
Hui Zhao, Yang Wei, Cheng Wang, Rui-Min Qiao, Wanli Yang, Phillip B Messersmith, Gao Liu
The excessive volume changes during cell cycling of Si-based anode in lithium ion batteries impeded its application. One major reason for the cell failure is particle isolation during volume shrinkage in delithiation process, which makes strong adhesion between polymer binder and anode active material particles a highly desirable property. Here, a biomimetic side-chain conductive polymer incorporating catechol, a key adhesive component of the mussel holdfast protein, was synthesized. Atomic force microscopy (AFM) based single molecule force measurements of mussel-inspired conductive polymer binder contacting a silica surface revealed similar adhesion toward substrate when compared with an effective Si anode binder, homo-polyacrylic acid (PAA), with the added benefit of being electronically conductive...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29333855/carbon-and-binder-free-core-shell-nanowire-arrays-for-efficient-ethanol-electro-oxidation-in-alkaline-medium
#4
Fen Guo, Yiju Li, Baoan Fan, Yi Liu, Lilin Lu, Yang Lei
To achieve high electrochemical surface area (ECSA) and avoid carbon support and binder in the anode catalyst of direct ethanol fuel cell, herein, we design freestanding core-shell nickel@palladium-nickel nanowire arrays (Ni@Pd-Ni NAs) without carbon support and binder for high-efficiency ethanol electro-oxidation. Bare Ni nanowire arrays (Ni NAs) are first prepared using the facile template-assistantelectrodeposition method. Subsequently, the Ni@Pd-Ni NAs are formed using one-step solution-based alloying reaction...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29333854/cucurbit-8-uril-based-giant-supramolecular-vesicles-highly-stable-versatile-carriers-for-photoresponsive-and-targeted-drug-delivery
#5
Cuihua Hu, Ningning Ma, Fei Li, Yu Fang, Yao Liu, Linlu Zhao, Shanpeng Qiao, Xiumei Li, Xiaojia Jiang, Tiezhu Li, Fangzhong Shen, Yibing Huang, Quan Luo, Junqiu Liu
Highly stable giant supramolecular vesicles were constructed by hierarchical self-assembly of cucurbit[8]uril (CB[8])-based supra-amphiphiles for photoresponsive and targeted intracellular drug delivery. These smart vesicles can encapsulate the model drugs with high loading efficiencies, and then release them by manipulating photoswitchable CB[8] heteroternary complexation to regulate the formation and dissociation of supra-amphiphiles that cause dramatic morphological changes of the assemblies to achieve remote optically-controlled drug delivery...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29333853/a-highly-sensitive-and-very-stretchable-strain-sensor-based-on-a-rubbery-semiconductor
#6
Hae-Jin Kim, Anish Thukral, Cunjiang Yu
There is a growing interest in developing stretchable strain sensors to quantify the large mechanical deformation and strain associated with the activities for a wide range of species, such as humans, machines, and robots. Here, we report a novel stretchable strain sensor entirely in a rubber format by using a solution processed rubbery semiconductor as the sensing material to achieve high sensitivity, large mechanical strain tolerance, hysteresis-less and highly linear responses. Specifically, the rubbery semiconductor exploits π-π stacked poly(3-hexylthiophene-2,5-diyl) nanofibrils (P3HT-NFs) percolated in silicone elastomer of polydimethylsiloxane (PDMS) to yield semiconducting nanocomposite with a large mechanical stretchability, although P3HT is a well-known nonstretchable semiconductor...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29333851/oxygen-vacancy-dynamics-at-room-temperature-in-oxide-heterostructures
#7
Shanyong Bao, Jing Ma, Teng Yang, Mingfeng Chen, Jiahui Chen, Shengli Pang, Ce-Wen Nan, Chonglin Chen
Oxygen vacancy dynamic behavior at room temperature in complex oxides was carefully explored by using a combining approach of ion liquid gating technique and resistance measurements. Heterostructures of PrBaCo2O5+δ/Gd2O3-doped CeO2 epitaxial thin films were fabricated on (001) Y2O3-stabilized ZrO2 single crystal substrates for systematically investigating the oxygen redox dynamics. The oxygen dynamic change as response to the gating voltage and duration were precisely detected by in situ resistance measurements...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29333850/engineering-nis-ni2p-heterostructures-for-efficient-electrocatalytic-water-splitting
#8
Xin Xiao, Dekang Huang, Yong Qing Richard Fu, Ming Wen, Xingxing Jiang, Xiaowei Lv, Man Li, Lin Gao, Shuangshuang Liu, Mingkui Wang, Chuan Zhao, Yan Shen
Developing high-active and low-cost bifunctional materials for catalyzing hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) holds pivotal role in water splitting. Therefore, we present a new strategy to form NiS/Ni2P heterostructures. The as-obtained NiS/Ni2P/CC requires overpotentials of 111 mV for the HER and 265 mV for the OER to reach a current density of 20 mA cm-2, outperforming their counterparts such as NiS and Ni2P under the same conditions. Additionally, the NiS/Ni2P/CC electrode requires a 1...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29333848/highly-stable-and-luminescent-perovskite-polymer-composites-from-a-convenient-and-universal-strategy
#9
Yumeng Xin, Hongjie Zhao, Jiuyang Zhang
Extensive attention has been received in recent years for perovskite-polymer composites due to their combination of properties from polymers and perovskites. In this work, a convenient and universal strategy is reported to prepare cesium lead bromide (CsPbBr3) or organolead halide CH3NH3PbBr3 polymer composites. This technique integrates the formation of perovskite crystals and polymer matrix in a one-pot reaction, avoiding the tedious separation and preparation of perovskites. The method is universal for most of commercially available monomers and polymers, which has been verified in this report by poly(methyl methacrylate) (PMMA), poly(butyl methacrylate) (PBMA) and polystyrene (PS)...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328632/probing-growth-induced-anisotropic-thermal-transport-in-high-quality-cvd-diamond-membranes-by-multi-frequency-and-multi-spot-size-time-domain-thermoreflectance
#10
Zhe Cheng, Thomas Bougher, Tingyu Bai, Steven Y Wang, Chao Li, Luke Yates, Brian Foley, Mark S Goorsky, Baratunde A Cola, Firooz Faili, Samuel Graham
The maximum output power of GaN-based high-electron mobility transistors is limited by high channel temperature induced by localized self-heating which degrades device performance and reliability. Chemical vapor deposition (CVD) diamond is an attractive candidate to aid in the extraction of this heat and in minimizing the peak operating temperatures of high power electronics. Due to its inhomogeneous structure, the thermal conductivity of CVD diamond varies along the growth direction and can differ between the in-plane and out-of-plane directions resulting in a complex three-dimensional distribution...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328631/controllable-interfacial-coupling-effects-on-the-magnetic-dynamic-properties-of-perpendicular-co-ni-5-cu-tbco-composite-thin-films
#11
Minghong Tang, Bingcheng Zhao, Weihua Zhu, Zhendong Zhu, Qingyuan Jin, Zongzhi Zhang
Dynamic magnetic properties in perpendicularly exchange-coupled [Co/Ni]5/Cu(tCu=0-2 nm)/TbCo structures show strong dependences on the interfacial AFM strength Jex controlled by the Cu interlayer thickness. The precession frequency f and effective damping constant αeff of [Co/Ni]5 multilayer differs distinctly for parallel (P) and antiparallel (AP) magnetization orientation states. For samples with a thin tCu, f of AP state is apparently higher while αeff is lower than in P state, owing to the unidirectional exchange bias effect (HEB) from the TbCo layer...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328630/effects-of-secondary-phases-on-the-high-performance-colossal-permittivity-in-titanium-dioxide-ceramics
#12
Chunlin Zhao, Jiagang Wu
The intensive demands of microelectronics and energy-storage applications are driving the increasing investigations on the colossal permittivity (CP) materials. In this study, we designed a new system of Dy and Nb co-doped TiO2 ceramics [(Dy0.5Nb0.5)xTi1-xO2] with the formation of secondary phases, and then the enhancement of overall dielectric properties (εr~5.0-6.5×104 and tan δ<8%) was realized in the broad composition range of 0.5%≤x≤5%. More importantly, effects of secondary phases on microstructure, dielectric properties, and stability were explored from the views of defect dipoles and internal barrier layer capacitance (IBLC) effect...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328627/effect-of-surface-chemistry-and-associated-protein-corona-on-the-long-term-biodegradation-of-iron-oxide-nanoparticles-in-vivo
#13
Grazyna Stepien, María Moros, Marta Perez-Hernandez, Marta Monge, Lucía Gutiérrez, Raluca Maria M Fratila, Marcelo Las Heras, Sebastian Menao Guillen, Juan Jose Puente Lanzarote, Conxita Solans, Julián Pardo, Jesús M De La Fuente
Protein corona formed on the surface of nanoparticle in biological medium determines its behavior in vivo. Here, iron oxide nanoparticles containing the same core and shell, but bearing two different surface coatings, either glucose or poly(ethylene glycol), were evaluated. The nanoparticles protein adsorption, in vitro degradation, and in vivo biodistribution and biotransformation over four months, were investigated. Although both types of nanoparticles bound a similar amount of proteins in vitro, the differences in the protein corona composition correlated to the nanoparticles biodistribution in vivo...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328626/polystyrene-core-silica-shell-scintillant-nanoparticles-for-low-energy-radionuclide-quantification-in-aqueous-media
#14
Colleen M Janczak, Isen A C Calderon, Zeinab Mokhtari, Craig Alan Aspinwall
β-particle emitting radionuclides are useful molecular labels due to their abundance in biomolecules. Detection of -emission from 3H, 35S, and 33P, important biological isotopes, is challenging due to the low energies (Emax ≤ 300 keV) and short penetration depths (≤ 0.6 mm) in aqueous media. The activity of biologically relevant β-emitters is usually measured in liquid scintillation cocktail (LSC), a mixture of energy-absorbing organic solvents, surfactants, and scintillant fluorophores, which places significant limitations on the ability to acquire time-resolved measurements directly in aqueous biological systems...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328624/secondary-phase-stochastics-in-lithium-ion-battery-electrodes
#15
Aashutosh Mistry, Kandler Smith, Partha P Mukherjee
Lithium-ion battery electrodes exhibit complex interplay among multiple electrochemically coupled transport processes, which rely on the underlying functionality and relative arrangement of different constituent phases. The electrochemically inactive solid phases (e.g., conductive additive and binder, referred to as the secondary phase) while beneficial for improved electronic conductivity and mechanical integrity, may partially block the electrochemically active sites and introduce additional transport resistances in the pore (electrolyte) phase...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328620/thermal-stability-of-mixed-cation-metal-halide-perovskites-in-air
#16
Wanliang Tan, Andrea Ruth Bowring, Andrew C Meng, Michael D McGehee, Paul C McIntyre
We study the thermal stability in air of the mixed cation organic inorganic lead halide perovskites Cs0.17FA0.83Pb(I0.83Br0.17)3 and Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3. For the latter compound, containing both MA+ and FA+ ion, thermal decomposition of the perovskite phase was observed to occur in two stages. The first stage of decomposi-tion occurs at an increased rate compared to the second stage and is only observed at relatively low temperatures (T<150 °C). For the second stage, we find the decomposition rate and the activation energy both have similar values for Cs0...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328618/highly-crystalline-multicolor-carbon-nanodots-for-dual-modal-imaging-guided-photothermal-therapy-of-glioma
#17
Min Qian, Yilin Du, Shanshan Wang, Chengyi Li, Huiling Jiang, Wei Shi, Jian Chen, Yi Wang, Ernst Wagner, Rongqin Huang
Imaging-guided site-specific photothermal therapy (PTT) of glioma and other tumors in central nervous system (CNS) presents a great challenge for the current nanomaterial design. Herein, an in-situ solid-state transformation method was developed for the preparation of multicolor highly crystalline carbon nanodots (HCCDs). The synthesis yields 6-8 nm sized HCCDs containing a highly crystalline carbon nanocore and a hydrophilic surface, which therefore simultaneously provide strong photoacoustic and photothermal performance as well as tunable fluorescence emission...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29328617/sinter-resistant-and-highly-active-sub-5-nm-bimetallic-au-cu-nanoparticle-catalyst-encapsulated-in-silica-for-high-temperature-carbon-monoxide-oxidation
#18
Navid Zanganeh, Vamshi Krishna Guda, Hossein Toghiani, Jason M Keith
A novel gold-copper based silica encapsulated mixed metal oxide (MMO) core-shell catalyst - with sub 5-nm MMO particles - was successfully synthesized via a reverse micelle process. The SiO2 encapsulated MMO catalyst was reduced under hydrogen flow to produce Au-Cu@SiO2 catalyst. XRD and XPS characterization confirmed the presence of Au-Cu nanocomposites in the catalyst while TEM characterization revealed the core-shell structure of the catalyst with the presence of sub 5-nm Au-Cu nanoparticle cores inside SiO2 shells...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29327917/peptide-based-photoelectrochemical-cytosensor-using-a-hollow-tio2-eg-znin2s4-co-sensitized-structure-for-ultrasensitive-detection-of-early-apoptotic-cells-and-drug-evaluation
#19
Rong Wu, Gao-Chao Fan, Li-Ping Jiang, Jun-Jie Zhu
The ability to rapidly detect apoptotic cells and accurately evaluate therapeutic effects is significant in cancer research. To address this target, a biocompatible, ultrasensitive photoelectrochemical (PEC) cytosensing platform was developed based on electrochemically reduced graphene (EG)/ZnIn2S4 co-sensitized TiO2 coupled with specific recognition between apoptotic cells and phosphatidylserine (PS)-binding peptide (PSBP). In this strategy, HL-60 cells were selected as a model, and C005, nilotinib and imatinib were selected as apoptosis inducers to show cytosensing performance...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29327912/reliable-manipulation-of-gas-bubble-size-on-superaerophilic-cones-in-aqueous-media
#20
Xiuzhan Xue, Ruixiao Wang, Linwen Lan, Jingming Wang, Zhongxin Xue, Lei Jiang
Gas bubbles in aqueous media are ubiquitous in a broad range of applications. In most cases, the size of bubbles must be manipulated precisely. However, it is very difficult to control the size of gas bubbles. The size of gas bubbles is affected by many factors both during and after the generation process. Thus, precise manipulation of gas bubble size still remains a great challenge. The ratchet and conical hairs of the Chinese brush enable it to realize a significant capacity for holding ink and transferring them onto paper continuously and controllably...
January 12, 2018: ACS Applied Materials & Interfaces
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