bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hollow Mesoporous Carbon Nanocubes: Rigid‐Interface‐Induced Outward Contraction of Metal‐Organic Frameworks
Authors: Liu Chao , Huang Xiaodan , Wang Jing , Song Hao , Yang Yannan , Liu Yang , Li Jiansheng , Wang Lianjun , Yu Chengzhong 
Published: December 2017

AbstractNovel carbon materials derived from metal‐organic frameworks (MOFs) have attracted much attention, but the commonly inevitable inward contraction during the carbonization process has restricted their structural variety and applications. In this work, a novel rigid‐interface induced outward contraction approach is reported for synthesizing hollow mesoporous carbon nanocubes (HMCNCs) by using ZIF‐8 nanocubes as precursors. HMCNCs exhibit a cubic morphology with the particle sizes slightly larger than ZIF‐8 nanocubes. Due to the unique outward contraction process, uniform carbon nanocubes with a hollow cavity, an outer microporous shell, and an inner mesoporous wall are simultaneously formed with a large pore size (25 nm), high surface area (1085.7 m2 g−1), high porosity (3.77 cm3 g−1), and high nitrogen content (12.2%). When used as a cathode material for Li–SeS2 batteries, the HMCNCs deliver a stable capacity of 812.6 mA h g−1 at 0.2 A g−1 after 100 cycles and an outstanding rate capability (455.1 mA h g−1 at 5.0 A g−1). The findings may pave the way for the construction of distinctive MOF‐derived carbon materials for various applications.
A Highly Selective 3D Spiked Ultraflexible Neural (SUN) Interface for Decoding Peripheral Nerve Sensory Information
Authors: Wang Jiahui , Thow Xin Yuan , Wang Hao , Lee Sanghoon , Voges Kai , Thakor Nitish V. , Yen Shih‐Cheng , Lee Chengkuo 
Published: December 2017

AbstractArtificial sensors on the skin are proposed as a way to capture information that can be used in intracortical microstimulation or peripheral intraneural stimulation to restore sensory feedback to persons with tetraplegia. However, the ability of these artificial sensors to replicate the density and complexity of the natural mechanoreceptors is limited. One relatively unexplored approach is to make use of the signals from surviving tactile and proprioceptive receptors in existing limbs by recording from their transmitting axons within the primary sensory nerves. Here, a novel spiked ultraflexible neural (SUN) interface that is implanted into the peripheral nervous system to capture sensory information from these mechanoreceptors in acute rat experiments is described. The novel 3D design, which integrates spiked structures for intrafascicular nerve recording with an ultraflexible substrate, enables a unique conformal interface to the target nerve. With the high‐quality recording (average signal‐to‐noise‐ratio of 1.4) provided by the electrode, tactile from proprioceptive stimuli can be differentiated in terms of the firing rate. In toe pinching experiments, high spatial resolution classification can be achieved with support vector machine classifier. Further work remains to be done to assess the chronic recording capability of the SUN interface.
Photoporation Using Carbon Nanotubes for Intracellular Delivery of Molecules and Its Relationship to Photoacoustic Pressure
Authors: Holguin Stefany Y. , Gray Michael D. , Joseph Princeton , Thadhani Naresh N. , Prausnitz Mark R. 
Published: December 2017

AbstractExposure of carbon‐black (CB) nanoparticles to near‐infrared nanosecond‐pulsed laser energy can cause efficient intracellular delivery of molecules by photoporation. Here, cellular bioeffects of multi‐walled carbon nanotubes (MWCNTs) and single‐walled carbon nanotubes (SWCNTs) are compared to those of CB nanoparticles. In DU145 prostate‐cancer cells, photoporation using CB nanoparticles transitions from (i) cells with molecular uptake to (ii) nonviable cells to (iii) fragmented cells with increasing laser fluence, as seen previously. In contrast, photoporation with MWCNTs causes uptake and, at higher fluence, fragmentation, but does not generate nonviable cells, and SWCNTs show little evidence of bioeffects, except at extreme laser conditions, which generate nonviable cells and fragmentation, but no significant uptake. These different behaviors cannot be explained by photoacoustic pressure output from the particles. All particle types emit a single, ≈100 ns, mostly positive‐pressure pulse that increases in amplitude with laser fluence. Different particle types emit different peak pressures, which are highest for SWCNTs, followed by CB nanoparticles and then MWCNTs, which does not correlate with cellular bioeffects between different particle types. This study concludes that cellular bioeffects depend strongly on the type of carbon nanoparticle used during photoporation and that photoacoustic pressure is unlikely to play a direct mechanistic role in the observed bioeffects.
Biodegradable Nanoparticles Enhanced Adhesiveness of Mussel‐Like Hydrogels at Tissue Interface
Authors: Pandey Nikhil , Hakamivala Amirhossein , Xu Cancan , Hariharan Prashant , Radionov Boris , Huang Zhong , Liao Jun , Tang Liping , Zimmern Philippe , Nguyen Kytai T. , Hong Yi 
Published: December 2017

AbstractPopular bioadhesives, such as fibrin, cyanoacrylate, and albumin–glutaraldehyde based materials, have been applied for clinical applications in wound healing, drug delivery, and bone and soft tissue engineering; however, their performances are limited by weak adhesion strength and rapid degradation. In this study a mussel‐inspired, nanocomposite‐based, biodegradable tissue adhesive is developed by blending poly(lactic‐co‐glycolic acid) (PLGA) or N‐hydroxysuccinimide modified PLGA nanoparticles (PLGA‐NHS) with mussel‐inspired alginate–dopamine polymer (Alg‐Dopa). Adhesive strength measurement of the nanocomposites on porcine skin–muscle constructs reveals that the incorporation of nanoparticles in Alg‐Dopa significantly enhances the tissue adhesive strength compared to the mussel‐inspired adhesive alone. The nanocomposite formed by PLGA‐NHS nanoparticles shows higher lap shear strength of 33 ± 3 kPa, compared to that of Alg‐Dopa hydrogel alone (14 ± 2 kPa). In addition, these nanocomposites are degradable and cytocompatible in vitro, and elicit in vivo minimal inflammatory responses in a rat model, suggesting clinical potential of these nanocomposites as bioadhesives.
Wood‐Based Nanotechnologies toward Sustainability
Authors: Jiang Feng , Li Tian , Li Yiju , Zhang Ying , Gong Amy , Dai Jiaqi , Hitz Emily , Luo Wei , Hu Liangbing 
Published: December 2017

AbstractWith over 30% global land coverage, the forest is one of nature's most generous gifts to human beings, providing shelters and materials for all living beings. Apart from being sustainable, renewable, and biodegradable, wood and its derivative materials are also extremely fascinating from a materials aspect, with numerous advantages including porous and hierarchical structure, excellent mechanical performance, and versatile chemistry. Here, strategies for designing novel wood‐based materials via advanced nanotechnologies are summarized, including both the controllable bottom‐up assembly from the highly crystalline nanocellulose building block and the more efficient top‐down approaches directly from wood. Beyond material design, recent advances regarding the sustainable applications of these novel wood‐based materials are also presented, focusing on areas that are traditionally dominated by man‐made nonrenewable materials such as plastic, glass, and metals, as well as more advanced applications in the areas of energy storage, wastewater treatment and solar‐steam‐assisted desalination. With all recent progress pertaining to materials' design and sustainable applications presented, a vision for the future engineering of wood‐based materials to promote continuous and healthy progress toward true sustainability is outlined.
3D Printing of Living Responsive Materials and Devices
Authors: Liu Xinyue , Yuk Hyunwoo , Lin Shaoting , Parada German Alberto , Tang Tzu‐Chieh , Tham Eléonore , de la Fuente‐Nunez Cesar , Lu Timothy K. , Zhao Xuanhe 
Published: December 2017

Abstract3D printing has been intensively explored to fabricate customized structures of responsive materials including hydrogels, liquid‐crystal elastomers, shape‐memory polymers, and aqueous droplets. Herein, a new method and material system capable of 3D‐printing hydrogel inks with programed bacterial cells as responsive components into large‐scale (3 cm), high‐resolution (30 μm) living materials, where the cells can communicate and process signals in a programmable manner, are reported. The design of 3D‐printed living materials is guided by quantitative models that account for the responses of programed cells in printed microstructures of hydrogels. Novel living devices are further demonstrated, enabled by 3D printing of programed cells, including logic gates, spatiotemporally responsive patterning, and wearable devices.
All‐Inorganic Perovskite Quantum Dots/p‐Si Heterojunction Light‐Emitting Diodes under DC and AC Driving Modes
Authors: Liu Jingjing , Sheng Xuexi , Wu Yangqing , Li Dongke , Bao Jianchun , Ji Yang , Lin Zewen , Xu Xiangxing , Yu Linwei , Xu Jun , Chen Kunji 
Published: December 2017

AbstractLight‐emitting diodes based on perovskite quantum dots have attracted much attention since they can be applied in low‐cost display, biosensors, and other optoelectronic devices. Here, all‐inorganic light‐emitting diodes based on n‐type perovskite quantum dots/p‐Si heterojunction are fabricated. Both the green and the red light emission are achieved at room temperature. The output power density is 0.14 mW cm−2 for green light device and 0.25 mW cm−2 for the red one. The relatively low turn on voltage and high emission intensity in red light device can be attributed to the small hole injection barrier between CsPbI3 quantum dots and p‐Si. The emission drop off at high current density is observed under direct current (DC) driving mode, which is significantly improved by applying alternating current (AC) square pulses. The enhanced electroluminescence and the improved operation stability at high current density under AC driving mode can be attributed to the less thermal degradation and the reduced charge accumulation in the interface defect states due to the alternated biases. The results demonstrate the possibility of integrating the perovskite quantum dots with Si platform, which will be helpful to extend their actual applications.
Highly Stable and Efficient Lignin‐PEDOT/PSS Composites for Removal of Toxic Metals
Authors: Checkol Fekadu , Elfwing Anders , Greczynski Grzegorz , Mehretie Solomon , Inganäs Olle , Admassie Shimelis 
Published: December 2017

AbstractA hybrid biopolymer/electronic polymer electrode is demonstrated here to extract metal ions, in this case lead, from water. The hybrid material consists of poly(3,4‐ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS) and the biopolymer lignin (LG) and is prepared by a simple one‐step galvanostatic polymerization from aqueous solution. The hybrid material is characterized by cyclic voltammetry, electrochemical quartz microbalance, X‐ray photoelectron spectroscopy, and scanning electron microscopy techniques. The electrochemical and spectroscopic results confirm that lead ions can be adsorbed on the composites films from a neutral solution of lead ions by applying a negative potential and subsequently desorbed from the hybrid films by applying positive potential. The adsorption capacity for lead ions on PEDOT/PSS is 245.5 mg g−1 and is almost doubled to 452.8 mg g−1 by incorporating LG into PEDOT/PSS.
Radiation‐Sensitive Dendrimer‐Based Drug Delivery System
Authors: Wu Szu‐Yuan , Chou Hsiao‐Ying , Yuh Chiou‐Hwa , Mekuria Shewaye Lakew , Kao Yu‐Chih , Tsai Hsieh‐Chih 
Published: December 2017

AbstractCombination of chemotherapy and radiotherapy is used to enhance local drug delivery while reducing off‐target tissue effects. Anticancer drug doxorubicin (DOX) is loaded into l‐cysteine modified G4.5 dendrimer (GC/DOX) and released at different pH values in the presence and absence of γ‐radiation. Presence of γ‐radiation significantly improves DOX release from the GC/DOX under acidic pH conditions, suggesting that GC dendrimer is a radiation‐sensitive drug delivery system. GC/DOX is further evaluated by determining cytotoxicity in uterine cervical carcinoma HeLa cells. GC/DOX shows high affinity for cancer cells and effective drug release following an external stimulus (radiation exposure), whereas an in vivo zebrafish study confirms that l‐cysteine acts as a radiosensitizer. GC/DOX treatment combined with radiotherapy synergistically and successfully inhibits cancer cell growth.
Recent Progress on MOF‐Derived Heteroatom‐Doped Carbon‐Based Electrocatalysts for Oxygen Reduction Reaction
Authors: Ren Qian , Wang Hui , Lu Xue‐Feng , Tong Ye‐Xiang , Li Gao‐Ren 
Published: December 2017

AbstractThe oxygen reduction reaction (ORR) is the core reaction of numerous sustainable energy‐conversion technologies such as fuel cells and metal–air batteries. It is crucial to develop a cost‐effective, highly active, and durable electrocatalysts for ORR to overcome the sluggish kinetics of four electrons pathway. In recent years, the carbon‐based electrocatalysts derived from metal–organic frameworks (MOFs) have attracted tremendous attention and have been shown to exhibit superior catalytic activity and excellent intrinsic properties such as large surface area, large pore volume, uniform pore distribution, and tunable chemical structure. Here in this review, the development of MOF‐derived heteroatom‐doped carbon‐based electrocatalysts, including non‐metal (such as N, S, B, and P) and metal (such as Fe and Co) doped carbon materials, is summarized. It furthermore, it is demonstrated that the enhancement of ORR performance is associated with favorably well‐designed porous structure, large surface area, and high‐tensity active sites. Finally, the future perspectives of carbon‐based electrocatalysts for ORR are provided with an emphasis on the development of a clear mechanism of MOF‐derived non‐metal‐doped electrocatalysts and certain metal‐doped electrocatalysts.
Theoretical Study of Sliding‐Electrification‐Gated Tribotronic Transistors and Logic Device
Authors: Jiang Tao , Zhang Limin , Zhang Xu , Zhang Chi , Peng Wenbo , Xiao Tianxiao , Wang Zhong Lin 
Published: December 2017

AbstractTriboelectric nanogenerators (TENG) were invented as a highly effective technology for harvesting ambient mechanical energy. By coupling the TENG and metal‐oxide‐semiconductor field‐effect transistor, a new field of tribotronics has been recently proposed using the electrostatic potential created by triboelectrification as a gate voltage to tune/control charge‐carrier transport in semiconductors. In this work, the performance of a sliding‐electrification‐gated tribotronic transistor (SGT) and a sliding‐electrification‐gated tribotronic logic device (SGL) are theoretically investigated. The drain–source current characteristics for both the N‐channel SGT and P‐channel SGT are calculated in enhancement and depletion modes, respectively, which are found to be controlled by triboelectric charge amount, sliding distance, and drain voltage. By scaling down the conduction channel length to 10 nm, the SGT can still work and exhibit similar current characteristic and charge‐transfer process, showing the great potential of tribotronics in large‐scale array integration. Furthermore, the operation principle of a designed SGL based on two N‐channel SGTs in enhancement mode is revealed. This work could provide in‐depth understanding of physical mechanisms for tribotronic devices and design guidance for potential applications of tribotronics.
Protons Enhance Conductivities in Lithium Halide Hydroxide/Lithium Oxyhalide Solid Electrolytes by Forming Rotating Hydroxy Groups
Authors: Song Ah‐Young , Xiao Yiran , Turcheniuk Kostiantyn , Upadhya Punith , Ramanujapuram Anirudh , Benson Jim , Magasinski Alexandre , Olguin Marco , Meda Lamartine , Borodin Oleg , Yushin Gleb 
Published: December 2017

AbstractLi‐halide hydroxides (Li2OHX) and Li‐oxyhalides (Li3OX) have emerged as new classes of low‐cost, lightweight solid state electrolytes (SSE) showing promising Li‐ion conductivities. The similarity in the lattice parameters between them, careless synthesis, and insufficient rigor in characterization often lead to erroneous interpretations of their compositions. Finally, moisture remaining in the synthesis or cell assembling environment and variability in the equivalent circuit models additionally contribute to significant errors in their properties. Thus, there remains a controversy about the real values of Li‐ion conductivities in such SSEs. Here an ultra‐fast synthesis and comprehensive material characterization is utilized to report on the ionic conductivities of contaminant‐free Li2+xOH1−xCl (x=0‐0.7), and Li2OHBr not exceeding 10‐4 S cm‐1 at 110 °C. Using powerful combination of experimental and numerical approaches, it is demonstrated that the presence of H in these SSEs yields significantly higher Li+ ‐ionic conductivity. Born‐Oppenheimer molecular dynamics simulations show excellent agreement with experimental results and reveal an unexpected mechanism for faster Li+ transport. It involves rotation of a short OH‐group in SSEs, which opens lower‐energy pathways for the formation of Frenkel defects and highly‐correlated Li+ jumps. These findings will reduce the existing confusions and show new avenues for tuning SSE compositions for further improved Li‐ion conductivities.
Superior Oxygen Electrocatalysis on RuSexNanoparticles for Rechargeable Air Cathodes
Authors: Jang Ji‐Hoon , Lee Eunjik , Xiao Penghao , Park Kyusung , Kim In Young , Henkelman Graeme , Hwang Seong‐Ju , Kwon Young‐Uk , Goodenough John. B. 
Published: December 2017

AbstractA one‐step, facile supercritical‐ethanol‐fluid synthesis of Se‐modified Ru nanoparticles nucleated on carbon defects is reported, and it is demonstrated that these nanoparticles provide, with >70% efficiency at 1 A g−1, a highly active and reversible oxygen‐reduction/oxygen‐evolution reaction on an air cathode in a nonaqueous electrolyte. The Se modification not only prevents Ru oxidation during charge/discharge cycling, but also improves the catalytic activity by promoting Li2O2versus Li2O deposited on the Ru particles during discharge. A computational calculation with density functional theory supports the role of a larger electron transfer to the oxygen of Li2O2adsorbed on a surface layer of RuSe2−δthan on a surface layer of RuO2, thereby shifting the more stable adsorbent from Li2O to Li2O2.
n‐Type SnSe2 Oriented‐Nanoplate‐Based Pellets for High Thermoelectric Performance
Authors: Luo Yubo , Zheng Yun , Luo Zhongzhen , Hao Shiqiang , Du Chengfeng , Liang Qinghua , Li Zhong , Khor Khiam Aik , Hippalgaonkar Kedar , Xu Jianwei , Yan Qingyu , Wolverton Chris , Kanatzidis Mercouri G. 
Published: December 2017

AbstractIt is reported that electron doped n‐type SnSe2 nanoplates show promising thermoelectric performance at medium temperatures. After simultaneous introduction of Se deficiency and Cl doping, the Fermi level of SnSe2 shifts toward the conduction band, resulting in two orders of magnitude increase in carrier concentration and a transition to degenerate transport behavior. In addition, all‐scale hierarchical phonon scattering centers, such as point defects, nanograin boundaries, stacking faults, and the layered nanostructures, cooperate to produce very low lattice thermal conductivity. As a result, an enhanced in‐plane thermoelectric figure of merit ZTmax of 0.63 is achieved for a 1.5 at% Cl doped SnSe1.95 pellet at 673 K, which is much higher than the corresponding in‐plane ZT of pure SnSe2 (0.08).
3D Amorphous Carbon with Controlled Porous and Disordered Structures as a High‐Rate Anode Material for Sodium‐Ion Batteries
Authors: Lu Peng , Sun Yi , Xiang Hongfa , Liang Xin , Yu Yan 
Published: December 2017

AbstractSodium‐ion batteries (SIBs) have a promising application prospect for energy storage systems due to the abundant resource. Amorphous carbon with high electronic conductivity and high surface area is likely to be the most promising anode material for SIBs. However, the rate capability of amorphous carbon in SIBs is still a big challenge because of the sluggish kinetics of Na+ ions. Herein, a three‐dimensional amorphous carbon (3DAC) with controlled porous and disordered structures is synthesized via a facile NaCl template‐assisted method. Combination of open porous structures of 3DAC, the increased disordered structures can not only facilitate the diffusion of Na+ ions but also enhance the reversible capacity of Na storage. When applied as anode materials for SIBs, 3DAC exhibits excellent rate capability (66 mA h g−1 at 9.6 A g−1) and high reversible capacity (280 mA h g−1 at a low current density of 0.03 A g−1). Moreover, the controlled porous structures by the NaCl template method provide an appropriate specific surface area, which contributes to a relatively high initial Coulombic efficiency of 75%. Additionally, the high‐rate 3DAC material is prepared via a green approach originating from low‐cost pitch and NaCl template, demonstrating an appealing development of carbon anode materials for SIBs.
Conceptualising disability: A critical comparison between Indigenous people in Australia and New South Wales disability service agencies
Authors: Ravindran Subahari , Brentnall Jennie , Gilroy John 
Published: December 2017

AbstractThe lack of culturally appropriate services contributes to the low participation rate of Indigenous people in disability services. Understanding how disability is conceptualised is essential to developing culturally appropriate disability services. This study aimed to critically compare the conceptualisation of disability between Indigenous people and NSW government and non‐government disability service agencies. Indigenous and policy sources were obtained from purposive and snowball sampling. The Indigenous conceptualisation of disability was understood through representations by Indigenous spokespeople in journal and newspaper articles and audiovisual materials. The disability service agency conceptualisation of disability was represented through the annual reports and programme guidelines of the NSW government agency and seven non‐government disability agencies. The occupational justice framework guided critical analysis at the cultural interface. Four themes were identified: power and self‐determination, eligibility, otherness, and identity and labels. Data showed disability agencies promote self‐determination for Indigenous people and conceptualise disability as impairments affecting functioning, when assessing service access eligibility. Most Indigenous people do not self‐identify as disabled and are categorised as culturally different within policies. Indigenous people experience marginalisation due to their cultural identity. Indigenous people are required to conform to the conceptualisation of disability proffered by agencies to access services. To develop culturally appropriate services, agencies must collaborate with Indigenous communities.