Qiang Zhang

Hubei University of Arts and Science

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Wendong Zhang

North University of China

Shengbo Sang

Taiyuan University of Technology

Jianlong Ji

Taiyuan University of Technology

Shengbo Sang

Taiyuan University of Technology

Zhen Pei

University of North Texas

Zhongyun Yuan

Taiyuan University of Technology

Yan Liu

Taiyuan University of Technology

Dong Zhao

Taiyuan University of Technology

Aoqun Jian

Taiyuan University of Technology

Chenyang Xue

North University of China

Cooperative Institutions

Chinese Academy of Sciences

Taiyuan University of Technology

University of Chinese Academy of Sciences

North University of China

Fudan University

Institute of Physics

Huazhong University of Science and Technology

Xi'an Jiaotong University

University of Science and Technology of China

Tsinghua University

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Super-stretchable, Transparent Carbon Nanotube-Based Capacitive Strain Sensors for Human Motion Detection

Scientific Reports (2013)

Le Cai Li Song Pingshan Luan Qiang Zhang Nan Zhang

Realization of advanced bio-interactive electronic devices requires mechanically compliant sensors with the ability to detect extremely large strain. Here, we design a new multifunctional carbon nanotube (CNT) based capacitive strain sensors which can detect strains up to 300% with excellent durability even after thousands of cycles. The CNT-based strain gauge devices exhibit deterministic and linear capacitive response throughout the whole strain range with a gauge factor very close to the predicted value (strictly 1), representing the highest sensitivity value. The strain tests reveal the presented strain gauge with excellent dynamic sensing ability without overshoot or relaxation, and ultrafast response at sub-second scale. Coupling these superior sensing capabilities to the high transparency, physical robustness and flexibility, we believe the designed stretchable multifunctional CNT-based strain gauge may have various potential applications in human friendly and wearable smart electronics, subsequently demonstrated by our prototypical data glove and respiration monitor.

Gauge factor

Strain gauge

10.1038/srep03048

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Citations (642)

Zero-energy-state-oriented tunability of spin polarization in zigzag-edged bowtie-shaped graphene nanoflakes under an electric field

Nanotechnology (2018)

Ge Yang Jianlong Ji Qiang Zhang Zhongyun Yuan Aoqun Jian

A comprehensive first-principles study of the correlation between zero-energy states and the tunability of the spin-selective semiconducting properties of zigzag-edged bowtie-shaped graphene nanoflakes under an electric field is presented for the first time. We demonstrate that the spin degenerate semiconducting ground state can be lifted by the electric field. In particular, we find that the number of zero-energy states ('the nullity') defined by the structural configuration determines the complexity and efficiency of the tunability of spin polarization. The fine-tuning of spin-dependent properties by the electric field originates from the manipulation of spin-polarized molecular orbital energies. We expect this study to aid the design of more effective and controllable low-dimensional molecular spintronics.

Zigzag

Spin states

10.1088/1361-6528/aaf549

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Citations (2)

Synthesis and Characterization of C-TiO2 Nanomaterials Via Carbon Assistance Method

Current Nanoscience (2018)

Qiang Zhang Zhenyin Hai Jie Wang Aoqun Jian Qianqian Duan

Background: With the increasing serious problem of water environment pollution, it is a hot spot to study the high efficient sewage treatment method. Owning to the photosensitization of carbon nanomaterials, carbon doped TiO2 (C-TiO2) has higher photocatalytic activity. Method: Here, we proposed a new method, carbon-assisted method, to prepare C-TiO2 nanomaterials. We first used degreasing cotton as a dispersant to fully absorb the TiCl4 sol. Results: After high-temperature calcination, C-TiO2nanomaterials were obtained. Characterizations results showed that the high specific surface area C-TiO2 nanomaterials in the size of about 50 nm showed a broader light absorption and narrower bandgap spectrum than P25 (commercial TiO2 nanoparticles). Conclusion: The C-TiO2 nanomaterials showed stronger photocatalytic ability than P25.

Nanomaterials

Carbon fibers

10.2174/1872212112666180628152321

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Citations (3)

A magnetoelastic biosensor based on E2 glycoprotein for wireless detection of classical swine fever virus E2 antibody

Scientific Reports (2017)

Xing Guo Shengbo Sang Jinyu Guo Aoqun Jian Qianqian Duan

A wireless magnetoelastic (ME) biosensor immobilized with E2 glycoprotein was first developed to detect classical swine fever virus (CSFV) E2 antibody. The detection principle is that a sandwich complex of CSFV E2 - rabbit anti-CSFV E2 antibody - alkaline phosphatase (AP) conjugated goat anti-rabbit IgG formed on the ME sensor surface, with biocatalytic precipitation used to amplify the mass change of antigen-antibody specific binding reaction, induces a significant change in resonance frequency of the biosensor. Due to its magnetostrictive feature, the resonance vibrations and resonance frequency can be actuated and wirelessly monitored through magnetic fields. The experimental results show that resonance frequency shift increases with the augmentation of the CSFV E2 antibody concentration. Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and fluorescence microscopy analysis proved that the modification and detection process were successful. The biosensor shows a linear response to the logarithm of CSFV E2 antibody concentrations ranging from 5 ng/mL to 10 μg/mL, with a detection limit (LOD) of 2.466 ng/mL and the sensitivity of 56.2 Hz/μg·mL

10.1038/s41598-017-15908-2

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Citations (27)

Highly sensitive, reliable and flexible piezoresistive pressure sensors based on graphene-PDMS @ sponge

Journal of Micromechanics and Microengineering (2020)

Jing Zhu Qiang Zhang Yongqiang Cheng Chao Ji Dong Zhao

In the research of flexible pressure sensors supported by three-dimensional skeleton structure, the combination of nanomaterials and skeleton structure is a difficult problem to be further solved. Herein, a piezoresistive sensor based on the graphene-PDMS @ sponge is prepared by fixing graphene on a sponge skeleton using PDMS. The as-prepared piezoresistive sensor exhibits high elasticity (strain up to 85%), high sensitivity (0.075 K Pa−1), a wide responding range (0–50 KPa) and high stability (2000 cycles pressure test). The piezoresistive sensor is used to detect blood pressure, heartbeat and human movements including finger bending, elbow movement and knee squatting, which shows good consistency and stability of the as-prepared sensor through the synergy of sponge, PDMS and graphene. The graphene-PDMS @ sponge sensor shows potential applications in medical testing and electronic skin.

Piezoresistive effect

10.1088/1361-6439/ab948f

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Citations (52)

A magnetostrictive BaTiO3-Fe-Ga & PDMS magnetic field sensor: Research on magnetic detection performance

Sensors and Actuators A Physical (2022)

Meng Xu Qiang Zhang Qiuyun Tan Wendong Zhang Shengbo Sang

10.1016/j.sna.2022.113383

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Citations (10)

3D printed stretchable sensor based on silver nanowires-polydimethylsiloxane

Modern Physics Letters B (2021)

Qiang Li Shengbo Sang Qiang Zhang Zhen Pei

As a new rapid additive manufacturing technology that has emerged in recent years, 3D printing technology can realize the precise manufacturing of complex and flexible sensor structures. In this study, a sensor was fabricated by injecting silver nanowires (AgNWs) ethanol solution into stretchable polydimethylsiloxane (PDMS). The substrate was used in two design configurations through a 3D printing template method, i.e. “straight” and “wave”. Compared to the straight sensor, the structural design of the wave sensor could increase the stretch range and sensitivity. In particular, the stretch range increased by 26.1% and the sensitivity improved by 96.0%. The stretchable sensor was successfully applied in pronunciation recognition and gait detection. Therefore, the stretchable sensor is also expected to be further used in fields such as foldable phones and wearable physiological signal sensors.

Polydimethylsiloxane

3d printed

Stretchable electronics

Screen printing

Wearable Technology

10.1142/s0217984921504662

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Citations (1)

Highly Sensitive and Stretchable Strain Sensor Based on Ag@CNTs

Nanomaterials (2017)

Qiang Zhang Lihua Liu Dong Zhao Qianqian Duan Jianlong Ji

Due to the rapid development and superb performance of electronic skin, we propose a highly sensitive and stretchable temperature and strain sensor. Silver nanoparticles coated carbon nanowires (Ag@CNT) nanomaterials with different Ag concentrations were synthesized. After the morphology and components of the nanomaterials were demonstrated, the sensors composed of Polydimethylsiloxane (PDMS) and CNTs or Ag@CNTs were prepared via a simple template method. Then, the electronic properties and piezoresistive effects of the sensors were tested. Characterization results present excellent performance of the sensors for the highest gauge factor (GF) of the linear region between 0–17.3% of the sensor with Ag@CNTs1 was 137.6, the sensor with Ag@CNTs2 under the strain in the range of 0–54.8% exhibiting a perfect linearity and the GF of the sensor with Ag@CNTs2 was 14.9.

Gauge factor

Polydimethylsiloxane

Piezoresistive effect

Nanomaterials

Linearity

Strain (injury)

Silver nanoparticle

10.3390/nano7120424

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Citations (52)

Highly Sensitive, Stretchable Strain Sensor Based on Ag@COOH‐Functionalized CNTs for Stroke and Pronunciation Recognition

Advanced Electronic Materials (2019)

Zhen Pei Yan Liu Qiang Zhang Dong Zhao Jie Wang

Abstract Combining metal and carbon nanomaterials is an effective way to significantly enhance the performance of soft strain sensors. The role of carbon nanotubes (CNTs) functionalized with different chemical groups in improving the properties of nanosilver‐coated carbon nanotubes (Ag@CNT) is investigated. The functionalized CNTs are first calculated with different chemical groups combined with the silver atoms. Ag@COOH‐functionalized CNTs exhibit greater binding energy and a smaller bandgap, which leads to better hydrophilicity, stability, and stronger bonding. Ag@CNTs are then synthesized using pristine CNT, OH‐functionalized CNT, and COOH‐functionalized CNT. Strain sensors are fabricated by wrapping the sensing material with polydimethylsiloxane (PDMS) to form a sandwich structure. Tests of these sensors are consistent with the simulation results; that is, COOH‐functionalized CNTs can greatly enhance the performance of Ag@CNT. In particular, Ag@COOH‐functionalized CNT sensors exhibit a strain range of nearly 40%, an initial resistance of 6.83 Ω, and excellent sensitivity, with a GF of 172. They can be applied in stroke detection and pronunciation recognition. This system also has great potential for foldable phones and flexible writing pads.

Polydimethylsiloxane

Nanomaterials

10.1002/aelm.201900227

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Citations (32)

An Analysis of Gas Metal Arc Welding Using the Lyapunov Exponent

Materials and Manufacturing Processes (2013)

Zhiyong Li Qiang Zhang Yan Li Yan Xiaocheng T. S. Srivatsan

The characteristics of chaos are unique to the technique of gas metal arc welding (GMAW), which can be safely classified as being a nonlinear process. In this article, salient aspects relevant to the development and use of computational technique to accurately calculate the maximum Lyapunov exponent of the welding processes for different parameters is presented and discussed. The maximum Lyapunov exponent is then used to evaluate stability of the welding process while concurrently aiding in the selection of the welding parameters. Careful analysis of the results reveals overall chaos to exist in the gas metal arc welding process for the different droplet transfer modes. Overall stability of the welding process is related to the chaos that is generated and exists. The maximum Lyapunov exponent can be safely used as a valid criterion for evaluating the stability of the welding process. This aids in the selection of an optimized welding parameter for the welding process to form a weld bead that has both quality and integrity.

10.1080/10426914.2012.746705

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Citations (20)