A wearable and highly sensitive strain sensor based on a polyethylenimine–rGO layered nanocomposite thin film

Ye, Xueliang; Yuan, Zhen; Tai, Huiling; Li, Weizhi; Du, Xiaosong; Jiang, Yadong

doi:10.1039/c7tc01872j

Cited by 69 publications

(53 citation statements)

References 43 publications

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“…Meanwhile, a peak at 1240 cm −1 corresponding to the CN stretching vibration of acylamino groups appeared, it should be attributed to the formation of a chemical covalent bonding between PEI and rGO . In addition, it is worth noting that the peaks at 2937, 2846, and 1654 cm −1 disappeared due to the decomposition of PEI during the dipping reduction process …”

Section: Resultsmentioning

confidence: 93%

“…For the PEI film, the absorption band between 3276 and 3413 cm −1 corresponds to the OH stretching vibration, the absorption peak shows a flat wide band instead of a sharp peak because the stretching vibration of NH 2 and NH also exit. The characteristic peaks at 2937 and 2846 cm −1 are attributed to the symmetry and antisymmetry stretching vibration absorption peaks of the CH 2  groups of PEI . Moreover, the peaks at 1654 and 1452 cm −1 correspond to the NH of NH and CH groups, respectively.…”

Section: Resultsmentioning

confidence: 96%

“…The rGO sensing layer was reduced by dipping the GO film in L(+)‐AA solution. In order to avoid that the sensing layer break away from the substrate surface during bending and L(+)‐AA solution immersion, PEI, a amine‐rich cationic polymer, was used to adhere the sensing layer and substrate through electrostatic attraction and chemical reaction between functional groups of GO and PEI . First, the gold IDE was deposited on PI substrate by thermal evaporation, and then the IDE was treated with UV plasma for 30 min to remove the residuals on the surface.…”

Section: Methodsmentioning

confidence: 99%

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A High‐Performances Flexible Temperature Sensor Composed of Polyethyleneimine/Reduced Graphene Oxide Bilayer for Real‐Time Monitoring

Liu

Tai

Yuan

et al. 2019

Adv Materials Technologies

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123

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sensor with enough sensitivity, accuracy, and durability which can realize real-time and long-term temperature monitoring is strongly desired.To date, some researches on skinattachable temperature sensors were reported, in which different kinds of materials, including metal nanoparticles/ nanowires, [4,5] graphene, [6][7][8][9][10] carbon nanotubes (CNTs), [11][12][13] polymers (such as poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)), [5a,10,12,14] and others, have been explored as temperature sensing materials. Among various materials, graphene and its derivatives are wildly applied in temperature sensors owing to its outstanding electrical and thermal properties. [15] However, the sensitivities of bare graphene or its derivatives based temperature sensors are unsatisfactory and generally no more than 1.00% °C −1 . [6,7,9,16,17] In order to obtain superior sensitivity and flexibility of temperature sensor, graphene and its derivatives were composited with other materials, such as PEDOT:PSS, [10] polyurethane (PU), [18] CNTs, [19] polydimethylsiloxane (PDMS), [8b] and cellulose. [20] According to the studies of graphene composite temperature sensor, the maximum sensitivity can achieve ≈1.34% °C −1 , while the highest accuracy can only reach 0.2 °C, still existing a gap to monitor human skin temperature, and the linearity and durability still remain to be improved for the practical use. [18] Additionally, the fabrication complexity was also largely increased by the composite process.Herein, a skin-attachable flexible temperature sensor with high sensitivity and durability was developed on polyimide (PI) substrate through a facile spray-dipping method. The polyethyleneimine (PEI) and bare reduced graphene oxide (rGO) were used as the adhesive and temperature sensing material, respectively, without any composite involved. The spectroscopy properties of the sensing film were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), and X-ray photoelectron spectroscopy (XPS) and the morphology was obtained by scanning electron microscope (SEM). The sensor exhibited a high sensitivity of 1.30% °C −1 between 25 and 45 °C, which is closely approximate to the graphene composites temperature sensor. Specially, the sensor can detect the very tiny temperature change of 0.1 °C and showed excellent durability (120 d), satisfying the demands The temperature sensors are urgently required for real-time temperature monitoring in healthcare, disease diagnosis, and other areas. In this work, a skin-attachable flexible temperature sensor composed of polyethyleneimine/ reduced graphene oxide bilayer is developed on polyimide substrate by a facile spray-dipping process. The spectroscopy properties of sensing films are examined and analyzed in details and demonstrated the partial reduction of graphene oxide film. The prepared sensor exhibits high sensitivity (1.30% °C −1 ), linearity (R 2 = 0.999), accuracy (0.1 °C), and durability (60 d) for temperature sensing ...

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A High‐Performances Flexible Temperature Sensor Composed of Polyethyleneimine/Reduced Graphene Oxide Bilayer for Real‐Time Monitoring

Liu

Tai

Yuan

et al. 2019

Adv Materials Technologies

Self Cite

123

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“…19b). In addition, different polymerization methods among polymer monomers combined with graphene can also produce excellent pressure-sensing materials [136][137][138]. The as-fabricated tactile sensors based on these active layers not only possessed a high pressuresensing performance but also achieved self-healing, thermal response and other properties of human skin, attaining the ideal platform to realize the practical application of E-skin.…”

Section: Combined With Polymersmentioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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HIGHLIGHTS• Tremendous progress has been advanced by research into graphene and its derivatives with great benefits toward low-cost, portable, and real-time tactile sensors/electronic skin.• The review presented herein direct future efforts aimed at high-quality graphene-based tactile sensors and their implications for the wider scientific community.• The paper also are informative regarding some basic and crucial issues regarding graphene and its derivatives, such as charge-transport principles, doping/trapping behaviors, correlations between structure/morphology and properties/functions.ABSTRACT Skin is the largest organ of the human body and can perceive and respond to complex environmental stimulations. Recently, the development of electronic skin (E-skin) for the mimicry of the human sensory system has drawn great attention due to its potential applications in wearable human health monitoring and care systems, advanced robotics, artificial intelligence, and human-of graphene materials; (2) state-of-the-art protocols recently developed for high-performance tactile sensing, including representative examples; and (3) perspectives and current challenges for graphene-based tactile sensors in E-skin applications. A summary of these cutting-edge developments intends to provide readers with a deep understanding of the future design of high-quality tactile sensing devices and paves a path for their future commercial applications in the field of E-skin.

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“…[8][9][10] Therefore, alternative conducting materials and fabrication techniques are required to overcome the limitations of conventional rigid sensors; hence, the resulting sensor system can be used for a wide range of potential applications, such as human-machine interfaces, so robots, and various wearable electronics. [11][12][13][14][15] Alternative materials for such sensors include carbon-based nanomaterials, such as graphene, [16][17][18][19][20] carbon black, [21][22][23][24] carbon nanotubes (CNT), [25][26][27] and others, 28,29 which have been widely applied for fabrication of strain sensors to measure various human body motions. Carbon-based strain sensor systems have been realized using ltration, 18,30 multiple dip-coating, 17 or paint brush.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive metal-grid strain sensors via water-based solution processing

Kim

Chang

2018

RSC Adv.

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A wearable and highly sensitive strain sensor based on a polyethylenimine–rGO layered nanocomposite thin film

Abstract: A novel strain sensor based on reduced graphene oxide with ultra-sensitive and ultra-durable performance was fabricated by the chemical layer-by-layer self-assembly method.

Cited by 69 publications

References 43 publications

A High‐Performances Flexible Temperature Sensor Composed of Polyethyleneimine/Reduced Graphene Oxide Bilayer for Real‐Time Monitoring

A High‐Performances Flexible Temperature Sensor Composed of Polyethyleneimine/Reduced Graphene Oxide Bilayer for Real‐Time Monitoring

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Highly sensitive metal-grid strain sensors via water-based solution processing

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