Two-probe versus van der Pauw method in studying the piezoresistivity of single-wall carbon nanotube thin films

Yao, Yanbo; Duan, Xiaoshuang; Luo, Jiangjiang; Liu, Tao

doi:10.1088/1361-6528/aa8585

Cited by 11 publications

(11 citation statements)

References 47 publications

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“…The piezoresistive behavior and its sensing performance (as strain/force sensor or humidity sensor) of the carbon patterns created by DLWc of NaLS were evaluated by using the electrical-mechanical/humidity ramp protocol previously established in our lab (Figures S1 and S2). ,, During the test, a Q800 dynamic mechanical analyzer with a DMA-RH accessory (TA Instruments) was used to apply the required force or humidity signals to the sample. At the same time, the electrical resistance of the sample was measured by a Keithley 3706A system switch/multimeter equipped with a 3721 dual 1 × 20 multiplexer card at a sampling rate of 1 s –1 .…”

Section: Methodsmentioning

confidence: 99%

Multifunctional Green Sensor Prepared by Direct Laser Writing of Modified Wood Component

Niu

Yao

Shi

et al. 2019

Ind. Eng. Chem. Res.

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The carbonization process of the cheap and renewable biomass–sodium lignosulfonate (NaLS) as a green carbon sources by an in-situ environmentally friendly processing methoddirect laser writing carbonization (DLWc)was investigated. With various characterization methods the film formation conditions and laser processing parameters were investigated for their effect on physical and chemical structures, electrical, piezoresistive, and humidity response behaviors of the carbon patterns. Besides its intrinsic piezoresistivity, the resistance of the DLWc created carbon feature can also respond to moisture change. With these dual characteristics, the carbon patterns were successfully applied as piezoresistive and humidity sensors. A high gauge factor of 120 was achieved for the piezoresistive sensor made of a square-shaped carbon pattern. The work presented in this study indicates that the application of DLWc to carbonize NaLS can create green carbon patterns suitable for a variety of force and humidity related sensing applications.

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Section: Methodsmentioning

confidence: 99%

Multifunctional Green Sensor Prepared by Direct Laser Writing of Modified Wood Component

Niu

Yao

Shi

et al. 2019

Ind. Eng. Chem. Res.

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“…For the area sensors (LLAS and CCAS), because of their squared-shape and thin film characteristics, a van der Pauw (vdP) four-probe test configuration was used for the same purpose. A detailed discussion comparing these two methods in evaluating piezoresistive materials can be found in ref . In the two-probe test configuration, two copper wires were glued to the two ends of the line sensor (PLS and DDLS) by using conductive silver adhesive as the electrical contacts.…”

Section: Methodsmentioning

confidence: 99%

A Route toward Ultrasensitive Layered Carbon Based Piezoresistive Sensors through Hierarchical Contact Design

Duan

Luo

Yao

et al. 2017

ACS Appl. Mater. Interfaces

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Ultrahigh sensitive piezoresistive sensors at small deformation are highly desired in many applications. Here, we propose a hierarchical contact design concept and implement it through a direct laser writing technique for fabricating layered carbon piezoresistive sensors with ultrahigh sensitivity. Sensors with unprecedented gauge factors (∼5000-10 000) at small deformation (ε < 0.1%) were successfully fabricated and demonstrated for their use in sensing both static and high-frequency (20-30 kHz) dynamic mechanical loads. A simple basic structure unit (BSU) contact network model was developed for understanding the importance of the BSU/BSU contact strength and network fractal dimension in dictating the piezoresistive sensitivity of the layered carbon piezoresistive sensors with designed hierarchical contact structures. The hierarchical contact design concept and the contact network model proposed in our work could open a general route for developing ultrasensitive piezoresistive sensors based on granular matter and composite materials.

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“…Figure a shows a prototypical device and Figure b shows its relative resistance change when subjected to a cyclic tensile deformation up to a maximum strain of 10%. The gauge factor (GF = ( R / R 0 – 1)/ε) of the PDMS/PCP flexible strain sensor was estimated to be about 21, which is comparable to the flexible sensors made of other types of carbon materialsgraphene, − carbon nanotubes, − graphite, and so forth.…”

Section: Results and Discussionmentioning

confidence: 77%

Direct Laser Writing-Assisted Method for Template-Free Fabrication of Biomass-Based Porous Carbon Platelets with Uniform Size and Arbitrarily Designed Shapes

et al. 2019

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Because of a wide range of applications of porous carbon platelets (PCPs), a robust method for their facile synthesis/fabrication with controlled porous structure, size, and shape is constantly needed. Herein, we report a simple and scalable method for producing PCPs with uniform size and arbitrarily designed shapes. This approach relies on CO 2 laser irradiation to induce carbonization of a biomass composite sheet formed by the infusion of sodium lignosulfonate into a cellulose paper to create porous carbon features with arbitrarily designed shapes. Upon subsequent water immersion treatment, the laser-written carbon features could spontaneously detach to form freestanding PCPs. The PCPs of different shapes were fabricated, characterized, and demonstrated for their potential applications in dye adsorption, as flexible sensors, and as miniaturized supercapacitors. Our method is expected to make great impacts in multiple fields, such as environment, energy storage, sensing, catalysis, and so forth.

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Two-probe versus van der Pauw method in studying the piezoresistivity of single-wall carbon nanotube thin films

Cited by 11 publications

References 47 publications

Multifunctional Green Sensor Prepared by Direct Laser Writing of Modified Wood Component

Multifunctional Green Sensor Prepared by Direct Laser Writing of Modified Wood Component

A Route toward Ultrasensitive Layered Carbon Based Piezoresistive Sensors through Hierarchical Contact Design

Direct Laser Writing-Assisted Method for Template-Free Fabrication of Biomass-Based Porous Carbon Platelets with Uniform Size and Arbitrarily Designed Shapes

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