Using patterned conductive and insulating collection devices, fibrous patterns from polyvinyl pyrrolidone were fabricated by electrospinning. Considering that the electrospun fibers tend to deposit along the direction...
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Reading guide 1778Repair of long-segment peripheral nerve defects1779Bionic reconstruction of hand function after adult brachial plexus root avulsion1780Optimized design of regeneration material for the treatment of p...
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Reading guide 1778Repair of long-segment peripheral nerve defects1779Bionic reconstruction of hand function after adult brachial plexus root avulsion1780Optimized design of regeneration material for the treatment of peripheral nerve injury1781Synergism of electroactive polymeric materials and electrical stimulation promotes peripheral nerve repair1783Schwann cell effect on peripheral nerve repair and regeneration .
Hitherto, the low electrochemical stability of the catalyst is one of the big issues hindering the commercial application of proton exchange membrane fuel cells (PEMFCs) . In this work, more stable support materials b...
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Hitherto, the low electrochemical stability of the catalyst is one of the big issues hindering the commercial application of proton exchange membrane fuel cells (PEMFCs) . In this work, more stable support materials based on functionalized graphene nanosheets (GNS), porous GNS, heteroatom doped GNS, and alternative GNS composites including GNS/nano-carbon (or nano-ceramics) sandwiches, nanoceramic wedged GNS, and core-shell graphene and amorphous carbon composites are prepared and applied in catalysts towards oxygen reduction reaction (ORR). based on the idea of bifunction of GNS to Pt catalysts, highly active and stable Pt/reduced graphene oxide (RGO) catalysts are developed by tuning the O/C atom ratio of RGO supports where the optimized O/C atom ratio of 0.14 is determined. Meantime, both perfluorosulfonic acid (PFSA) functionalized GNS and sulfonic acid group-grafted RGO supported Pt catalysts show a higher catalytic activity and a lower loss rate of electrochemical active area (ECA) in comparison with that of the plain Pt/GNS and conventional Pt/C catalysts. In addition, the N-doped RGO supported Pt catalyst (Pt/NRGO) is synthesized using a lyophilisation-assisted N-doping method, revealing a higher catalytic activity and a lower ECA loss of the Pt/NRGO catalyst to compare with that of the Pt/GO and Pt/C catalysts. In addition, to tackle the stacking issues of GNS which leads to the low mass transport property, the porous GNS are synthesized. Besides, we also describe a new strategy to synthesize GNS hybrids including GNS/nano-carbon (nano-creamics) sandwiches and nano-ceramic wedged GNS architectures. These unique architectures with highly dispersed Pt NPs exhibit much high catalytic activities towards ORR and an excellent electrochemical stability. At last, a new graphene @ amorphous carbon core-shell material also shows an excellent electrochemical property. This work was supported financially by the National Natural Science Foundation of China (NSFC) (No. 5
Water-related energy is an inexhaustible and renewable energy resource in our environment, which has huge amount of energy and is not largely dictated by daytime and sunlight. The transparent characteristic plays a ke...
Water-related energy is an inexhaustible and renewable energy resource in our environment, which has huge amount of energy and is not largely dictated by daytime and sunlight. The transparent characteristic plays a key role in practical applications for some devices designed for harvesting water-related energy. In this paper, a highly transparent triboelectric nanogenerator (T-TENG) was designed to harvest the electrostatic energy from flowing water. The instantaneous output power density of the T-TENG is 11.56 mW/m(2). Moreover, with the PTFE film acting as an antireflection coating, the maximum transmittance of the fabricated T-TENG is 87.4%, which is larger than that of individual glass substrate. The T-TENG can be integrated with silicon-based solar cell, building glass and car glass, which demonstrates its potential applications for harvesting waste water energy in our living environment and on smart home system and smart car system.
Epitaxial (0001)-oriented Zn1-xCoxO (x= 0.01, 0.05 and 0.1) thin films were grown on c-sapphire substrates by pulsed laser deposition. The XRD analysis, optical transmittance and XPS measurements revealed that the...
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Epitaxial (0001)-oriented Zn1-xCoxO (x= 0.01, 0.05 and 0.1) thin films were grown on c-sapphire substrates by pulsed laser deposition. The XRD analysis, optical transmittance and XPS measurements revealed that the Co2+ substituted Zn2+ ions were incorporated into the lattice of ZnO in Zn1-xCoxO thin films. The electrical properties measurements revealed that the Co concentration had a non- monotonic influence on the electrical properties of the Zn1-xCoxO thin films due to the defects resulted from imperfections induced by Co substitution. The resistivity remarkably increased and the carrier concentration remarkably decreased in Zn1-x CoxO thin films after oxygen annealing at 600 ℃ under 15 Pa O2 pressure for 60 mins. Room-temperature ferromagnetic was observed and the ferromagnetic Co amount was smaller than the nominal Co concentration for Zn1-xCoxO samples before oxygen annealing. After oxygen annealing, the Zn1-x CoxO thin films exhibited paramagnetic behavior. It is suggested that the room-temperature ferromagnetic ofZn1-x CoxO thin films may attribute to defects or carriers induced mechanism.
In this study, an enzymatic electrochemical biosensor for L-lactate detection was proposed. The device was developed based on gold nanoparticles (Au NPs) modified zinc oxide nanorods (ZnO NRs). The sensing performance...
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In this study, an enzymatic electrochemical biosensor for L-lactate detection was proposed. The device was developed based on gold nanoparticles (Au NPs) modified zinc oxide nanorods (ZnO NRs). The sensing performance of the device was examined by cyclic voltammetry and amperometry. Compared with pristine ZnO based biosensor, Au/ZnO based sensor exhibited higher sensitivity of 24.56 μA cm(-2) mM(-1), smaller K(M)(app) of 1.58 mM, lower detection limit of 6 μM and wider linear range of 10 μM-0.6 mM for L-lactate detection. The introduction of Au NPs enhances electro-catalytic ability and electron migration, which contributes to the improvement of the sensing performance. Hence, the results confirm the essential character of Au NPs in such semiconductor based electrochemical biosensing system.
Well-aligned ZnO nanorod (NR) arrays were grown on the indium-tin-oxide glass through a hydrothermal method . A novel and simple method was created to fabricate the high-performance ultraviolet (UV) photodetectors on ...
Well-aligned ZnO nanorod (NR) arrays were grown on the indium-tin-oxide glass through a hydrothermal method . A novel and simple method was created to fabricate the high-performance ultraviolet (UV) photodetectors on the basis of the ZnO NR arrays. When the ZnO NRs device is under 365-nm UV illumination (2.01 mW/cm 2 ), it showed a photocurrent of ~308.04 μA, an on/off ratio of ~5.13×10 2 and a fast decay time constant of 1.69 s at 1 V applied bias. The performance of the ZnO NRs device was much better than that of the conventional ZnO film device. The superior photoresponse of the ZnO NRs device is due to the larger surface-to-volume ratio and better crystal quality of ZnO NRs. The ZnO NRs device has great potential for application in UV detection and is promising for large-scale production.
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