Individual Water‐Filled Single‐Walled Carbon Nanotubes as Hydroelectric Power Converters

Zhao, Yuanchun; Li, Song; Deng, Ke; Zheng, Lei; Zhang, Zengxing; Yang, Yanlian; Wang, Chen; Yang, Hang; Jin, Aizi; Luo, Qiang; Gu, Changzhi; Xie, Sishen; Sun, Lianfeng

doi:10.1002/adma.200702956

Cited by 185 publications

(152 citation statements)

References 37 publications

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“…To our knowledge, this waving potential cannot be explained by any previously proposed mechanisms, such as phonon drag 10 , asymmetric fluctuating 7 or electronic friction 12 , because all the mechanisms are common in that the induced voltage should be observed with the sample moving completely under the water and without liquid-gas boundary being required, while in our experiments there is no measurable voltage under these conditions. Diffusio-osmosis effects 23 , arising from salt gradients, which may be introduced in our case by the water evaporation, are also excluded, since we did not find noticeable dependence of the induced voltage signal on the relative humidity ranging from 5 to 95% (Supplementary Fig.…”

Section: Resultscontrasting

confidence: 52%

“…Nanoscale materials offer much promise in pursuing highefficient energy conversion technology owing to their particular size and surface effects that introduce exceptional sensitivity to external stimulus [2][3][4][5][6] . Since 2001, a lot of attempts have been made to produce a voltage in carbon nanomaterials immersed in flowing liquid without the pressure gradient as required for the streaming potential [7][8][9][10][11][12] . However, the reported flow-induced voltages are in wide discrepancy and the proposed mechanisms remain conflictive [8][9][10][11][12][13][14] .…”

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confidence: 99%

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Waving potential in graphene

et al. 2014

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Nanoscale materials offer much promise in the pursuit of high-efficient energy conversion technology owing to their exceptional sensitivity to external stimulus. In particular, experiments have demonstrated that flowing water over carbon nanotubes can generate electric voltages. However, the reported flow-induced voltages are in wide discrepancy and the proposed mechanisms remain conflictive. Here we find that moving a liquid-gas boundary along a piece of graphene can induce a waving potential of up to 0.1 V. The potential is proportional to the moving velocity and the graphene length inserted into ionic solutions, but sharply decreases with increasing graphene layers and vanishes in other materials. This waving potential arises from charge transfer in graphene driven by a moving boundary of an electric double layer between graphene and ionic solutions. The results reveal a unique electrokinetic phenomenon and open prospects for functional sensors, such as tsunami monitors.

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Section: Resultscontrasting

confidence: 52%

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confidence: 99%

Waving potential in graphene

et al. 2014

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“…A 400-nmthick silver (Ag) film was then evaporated on the substrate. SWNTs were grown on the silver surface using floatingcatalytic chemical vapour deposition (Zhao et al 2008) in a mixture of 1000 sccm Ar and 10 sccm CH 4 at 1000°C. Finally, following a lift-off process to remove unwanted Ag particles and SWNTs on PMMA, the sample was subjected to a thermal annealing treatment at 960°C.…”

Section: Methodsmentioning

confidence: 99%

Controlling conducting channels of single-walled carbon nanotube array with atomic force microscopy

Nshimiyimana

Zhang

et al. 2017

Appl Nanosci

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In this paper, we report a technique of controlling the number of single-walled carbon nanotubes (SWNTs) between two electrodes. The SWNT devices consist of an array of SWNTs between two silver/palladium electrodes, which are fabricated with electron beam lithography and silver. Using the tip-sample interaction in contact mode of atomic force microscopy (AFM), the number of individual SWNTs can be controllably decreased. The current-voltage measurements indicate that the resistance increases when the conducting channels of SWNTs are reduced. This simple and controllable approach could be useful for the assembly of high performance devices with a desired number of channels for future electronic investigations.

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“…3(b). By doping n-type semiconductor element or coating PEI [15,16], the n-type CNT film can be synthesized. CNT films are heated by the thermoprobe, the temperature is 348 K at the hot-end and 298 K at the cold-end.…”

Section: Experiments and Verificationmentioning

confidence: 99%

Simulation and Experiment on In-plane Carbon Nanotube Thermoelectric Generator in Parallel

Huang¹,

Song²,

Liu³

et al. 2017

MATEC Web Conf.

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Abstract. In order to solve the problem of larger internal resistance of thin-film thermoelectric generator (TEG) in series, which could influence the output power and restrict the application, the in-plane carbon nanotube (CNT) TEG in parallel was ingeniously researched. Utilizing the parameters of output power, conversion and energy efficiencies, the ideal and actual models of TEG in parallel were established, respectively. The thermal conduction insulating layer was taken into account, which could provide the theoretical guidance for the experimental test and engineering applications. The CNT films were prepared by the floating-catalyst chemical vapor deposition (CVD), and the experiment and properties of TEG based on CNT films were investigated. The testing circuits of conventional and gas TEGs were designed, and the output powers of the serial and parallel connecting types were tested and compared. The correctness of theoretical model and numerical analysis was proved to be valid. The novel method could effectively enhance the output power, extend the applied range of TEG in MEMS/NEMS and had a fine prospect.

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Individual Water‐Filled Single‐Walled Carbon Nanotubes as Hydroelectric Power Converters

Cited by 185 publications

References 37 publications

Waving potential in graphene

Waving potential in graphene

Controlling conducting channels of single-walled carbon nanotube array with atomic force microscopy

Simulation and Experiment on In-plane Carbon Nanotube Thermoelectric Generator in Parallel

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