Ultrasensitive Pressure Sensor Based on an Ultralight Sparkling Graphene Block

Lv, Lihua; Zhang, Panpan; Xu, Tong; Qu, Liangti

doi:10.1021/acsami.7b07153

Cited by 120 publications

(103 citation statements)

References 57 publications

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“…Development in this area has been rapid with much effort having been focused on improving the sensitivity or durability of a single sensor . Exciting advancements have certainly been made in the field of flexible electronic devices in the last two decades and the sensing capabilities of tactile sensors have even exceeded those of human skins . At the same time, some studies have been made to mimic the human skin by implementing the multifunctional sensors through integration of several sensors .…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] Exciting advancements have certainly been made in the field of flexible electronic devices in the last two decades and the sensing capabilities of tactile sensors have even exceeded those of human skins. [3][4][5] At the same time, some studies have been made to mimic the human skin by implementing the multifunctional sensors through consists of a bottom interdigitated electrode and a top bridge of PANI-coated fabric. This type of multifunctional sensor has a high pressure sensitivity over a wide range of pressures (300 Pa-30 kPa) and an excellent linear response to NH 3 at room temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Low‐Cost Polyaniline@Textile‐Based Multifunctional Sensor for Simultaneously Detecting Tactile and Olfactory Stimuli

Tang

Zhang

et al. 2018

Macro Materials & Eng

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Multifunctional sensors are those able to respond to both physical and chemical stimuli and potentially capable of differentiating two or more signals. However, a low‐cost multifunctional sensor able to distinguish different signals is hard to fabricate. Here, a low‐cost polyaniline@textile‐based multimodal sensor is demonstrated to be able to simultaneously detect and distinguish tactile and olfactory stimuli in a single pixel. The multifunctional sensor has a high pressure sensitivity over a wide range of pressures (300 Pa–30 kPa) and an excellent linear response to NH3 at room temperature. More importantly, it can differentiate different stimuli due to different mechanisms for pressure sensing and gas sensing. With its low cost and multiple functionality, the sensor is promising for practical applications in wearable electronics and human health monitoring.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low‐Cost Polyaniline@Textile‐Based Multifunctional Sensor for Simultaneously Detecting Tactile and Olfactory Stimuli

Tang

Zhang

et al. 2018

Macro Materials & Eng

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“…Uniform nanographene films obtained by chemical vapor deposition have been reported to exhibit a gauge factor of over 250, whereas the maximum strain was found to be less than 0.4% . To achieve force sensors with a high stress sensitivity and a large strain range, macroscopic 3D monoliths of these nanomaterials with high porosity and compressibility have been developed . Lv et al demonstrated a simple sparkling strategy to produce ultralight graphene blocks .…”

Section: Introductionmentioning

confidence: 99%

“…To achieve force sensors with a high stress sensitivity and a large strain range, macroscopic 3D monoliths of these nanomaterials with high porosity and compressibility have been developed . Lv et al demonstrated a simple sparkling strategy to produce ultralight graphene blocks . Kim et al transformed an inelastic CNT aerogel into a superelastic material by coating it with graphene nanoplatelets .…”

Section: Introductionmentioning

confidence: 99%

Electrical Breakdown‐Induced Tunable Piezoresistivity in Graphene/Polyimide Nanocomposites for Flexible Force Sensor Applications

Jiang

Xing

et al. 2018

Adv Materials Technologies

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nanomaterials with excellent electrical properties have been used in flexible piezoresistive force sensors, such as graphene, carbon nanotube (CNT), and graphite nanoplatelets. The electronic band structure of graphene is shifted by its in-plane elastic strain, which causes attractive changes in the electrical properties under structural deformation. [10] Uniform nanographene films obtained by chemical vapor deposition have been reported to exhibit a gauge factor of over 250, whereas the maximum strain was found to be less than 0.4%. [11,12] To achieve force sensors with a high stress sensitivity and a large strain range, macroscopic 3D monoliths of these nanomaterials with high porosity and compressibility have been developed. [13][14][15][16][17] Lv et al. demonstrated a simple sparkling strategy to produce ultralight graphene blocks. [15] Kim et al. transformed an inelastic CNT aerogel into a superelastic material by coating it with graphene nanoplatelets. [16,17] The above-mentioned 3D monoliths exhibit good electrical conductivity and high compressive strain ranges. However, the sparkling approach generates air bubbles with a size of 100-300 µm, forming a macroporous framework. The coating of CNT aerogel with graphene nanoplatelets involves the conversion of polyacrylonitrile into graphene at 1010 °C with the shrinkage of CNT aerogels. The fabrication of monoliths using the above-mentioned strategies has many challenges such as high temperatures and dimension shrinkage in microfabrication. These monoliths are all fabricated on the macroscale and face many challenges in microfabrication.Electrically conductive nanocomposites comprising carbonbased nanomaterials and insulating polymer matrices have been used in force sensors because of their excellent stretchability, low cost, and facile process of fabrication. [18][19][20][21] Owing to the universality of this technique and diverse mechanical properties of different polymers, the obtained conductive nanocomposites exhibit a wide range of elastic moduli. The dependence of electrical resistivity on force can be adjusted by changing the nanomaterial concentration. [22,23] To achieve a high sensitivity in the low-stress regime, porous structures and microdome/pyramid arrays have been developed. [24][25][26][27][28][29][30][31] Lee et al. fabricated an ultrasensitive pressure sensor by an electrospinning process, [30] and Park et al. demonstrated the detection of Flexible force sensors based on graphene/polymer nanocomposites have attracted tremendous attention owing to their remarkable sensitivity and ease of fabrication. In the present study, nanocomposites consisting of graphene as conducting fillers in a polyimide matrix are prepared, and an electrical breakdown method is used to endow the nanocomposite with a high piezoresistivity. Electromechanical tests and theoretical models confirm that the piezoresistivity of the nanocomposite originates from the cracks in the carbonized polymers induced by electrical breakdown. The fabricated force sensor exhibits a bro...

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“…A 1000‐fold times resistance change can be realized within a pressure range of 1–70 kPa. Totally, the fabricated multimeter‐like pressure sensor shows a wide pressure range from <1 Pa to 72 kPa with different ultrahigh sensitivities using different sensing parts (15.22 kPa −1 for 0–300 Pa, 0.22 kPa −1 for 0.09–30 kPa, and 46.67 kPa −1 for 48–72 kPa), which present the prominent advantages in both the sensitivity and pressure range than some previous reports (Table S1, Supporting Information) …”

mentioning

confidence: 99%

Ab Initio Design of Graphene Block Enables Ultrasensitivity, Multimeter‐Like Range Switchable Pressure Sensor

Zang

Wang

Xia

et al. 2019

Adv Materials Technologies

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From the weighing instruments in ancient China to the modern high-precision electronic balances and further the in vivo pressure measurements, the pressure determination by using the pressure sensors is absolutely needed in our life. At present, there are many kinds of pressure sensors based on different mechanisms including resistance change, piezoelectricity, capacitance, potential, and other detectable physical quantities as output signals, [1][2][3][4] using multiform pressure sensing materials such as conductive polymers, nanowires, carbon nanotubes, graphene, and so on. [5][6][7][8][9][10][11][12] Particularly the resistance-type pressure sensor, which is based on the correlation between the resistance change and mechanical deformation, has attracted more attention in recent years due to its wide potential applications including soft robotics, wearable devices, touch-on flexible displays, and health monitoring systems. [13][14][15][16] Conventional resistance-type pressure sensors have been widely accepted with rapid development; however, despite the tremendous efforts devoted to the improvement of sensitivity and detection limit, the wide-range detection of pressure still remains as an open issue. As one of the next-generation pressure-sensing materials, graphene has been extensively explored owing to its mechanical flexibility and low detection limit. Nevertheless, it is now suffering from the same issues. [17,18] Typically, a pressure sensor based on a suspended single-layer graphene has been demonstrated to possess a wide pressure sensing range up to 100 kPa but with a low sensitivity (2.66 × 10 −5 kPa −1 ). [19] To build the high-performance sensors with better sensitivity and lower detection limit, vesiculation of the sensing materials has been recognized as a promising solution due to its advantages of high porosity, good flexibility, and excellent robustness under the mechanical strain/stress, especially in the graphene-based system. [20] So far, the controlled reassembly, hydrothermal reduction, freeze drying, and chemical vapor deposition (CVD) growth and other in situ foaming methods have been used to synthesize the graphene foams (GFs) and their congeners (sponges and aerogels) by utilizing the surface activity of the graphene or the graphene oxide (GO) nanofilm. [21][22][23][24][25][26][27] Representatively, Ren and co-workers improved In pursuit of the next-generation pressure sensors, the fabrication of graphene-based devices is considered to be one of the most promising approaches to address the unsatisfied sensitivity within a wide pressure range. Here, an ab initio design based on the graphene block is proposed to realize a high-performance and multimeter-like range switchable pressure sensor. The sensor contains three designed graphene-based foams with different initial resistances, which enable continuous resistance-change behavior induced by the pressure. Specifically, the reduced graphene oxide (rGO) foam-based sensor demonstrates a three times resistance change within the pressure ran...

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Ultrasensitive Pressure Sensor Based on an Ultralight Sparkling Graphene Block

Cited by 120 publications

References 57 publications

A Low‐Cost Polyaniline@Textile‐Based Multifunctional Sensor for Simultaneously Detecting Tactile and Olfactory Stimuli

A Low‐Cost Polyaniline@Textile‐Based Multifunctional Sensor for Simultaneously Detecting Tactile and Olfactory Stimuli

Electrical Breakdown‐Induced Tunable Piezoresistivity in Graphene/Polyimide Nanocomposites for Flexible Force Sensor Applications

Ab Initio Design of Graphene Block Enables Ultrasensitivity, Multimeter‐Like Range Switchable Pressure Sensor

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