Wide‐Range Strain Sensors Based on Highly Transparent and Supremely Stretchable Graphene/Ag‐Nanowires Hybrid Structures

Li, Qi; Ullah, Zaka; Li, Weiwei; Guo, Yikun; Xu, Jingxian; Wang, Rubing; Zeng, Qi; Chen, Mingliang; Liu, Chaojun; Liu, Liwei

doi:10.1002/smll.201600487

Cited by 86 publications

(42 citation statements)

References 31 publications

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“…For the graphene film grown on Cu(111), the excellent electrical quality of graphene film can be used for flexible transparent electrodes23. While the graphene film on Cu(001) has larger sheet resistance, such graphene can be used to fabricate strain sensors, as graphene with low conductivity delivers higher sensing performance3940.…”

Section: Resultsmentioning

confidence: 99%

Roles of Oxygen and Hydrogen in Crystal Orientation Transition of Copper Foils for High-Quality Graphene Growth

Zhao

Shi

et al. 2017

Sci Rep

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The high-quality graphene film can be grown on single-crystal Cu substrate by seamlessly stitching the aligned graphene domains. The roles of O2 and H2 have been intensively studied in the graphene growth kinetics, including lowering the nucleation sites and tailoring the domain structures. However, how the O2 and H2 influence Cu orientations during recrystallization prior to growing graphene, still remains unclear. Here we report that the oxidation of Cu surface tends to stabilize the Cu(001) orientation while impedes the evolution of Cu(111) single domain during annealing process. The crystal orientation-controlled synthesis of aligned graphene seeds is further realized on the long-range ordered Cu(111) substrate. With decreasing the thickness of oxide layer on Cu surface by introducing H2, the Cu(001) orientation changes into Cu(111) orientation. Meanwhile, the average domain size of Cu foils is increased from 50 μm to larger than 1000 μm. The density functional theory calculations reveal that the oxygen increases the energy barrier for Cu(111) surface and makes O/Cu(001) more stable than O/Cu(111) structure. Our work can be helpful for revealing the roles of O2 and H2 in controlling the formation of Cu single-crystal substrate as well as in growing high-quality graphene films.

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Section: Resultsmentioning

confidence: 99%

Roles of Oxygen and Hydrogen in Crystal Orientation Transition of Copper Foils for High-Quality Graphene Growth

Zhao

Shi

et al. 2017

Sci Rep

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“…According to working mechanisms, FTSS devices can be categorized based on the employed capacitive, piezoelectric, piezoresistive, and optical effects . The materials range from stretchable polymers, such as poly(dimethyl siloxane) (PDMS) and Ecoflex, to conductive fillers, such as nanowires, nanoparticles, and low dimensional carbonaceous materials, as well as their hybrid micro‐/nanostructures . In particular, owing to the excellent mechanical compliancy and unique electric characteristics, substantial efforts have been focused on exploiting carbonaceous materials such as carbon nanotubes (CNTs) and graphene in the development of FTSS.…”

Section: Introductionmentioning

confidence: 99%

3D Graphite–Polymer Flexible Strain Sensors with Ultrasensitivity and Durability for Real‐Time Human Vital Sign Monitoring and Musical Instrument Education

Guo

Fan

2017

Adv Materials Technologies

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to motion sensors. [9][10][11][12][13][14][15][16][17] In particular, flexible thin-film strain sensors (FTSS) that are attached to epidermis and detect small movements have received intensive research interest. [11,[17][18][19][20][21][22] According to working mechanisms, FTSS devices can be categorized based on the employed capacitive, [17,19] piezoelectric, [23][24][25] piezoresistive, [11,18,26] and optical effects. [27][28][29] The materials range from stretchable polymers, such as poly(dimethyl siloxane) (PDMS) [11,26,[30][31][32] and Ecoflex, [33] to conductive fillers, such as nanowires, [34,35] nanoparticles, [21,36] and low dimensional carbonaceous materials, [10][11][12]18,33,37] as well as their hybrid micro-/nanostructures. [38][39][40] In particular, owing to the excellent mechanical compliancy and unique electric characteristics, substantial efforts have been focused on exploiting carbonaceous materials such as carbon nanotubes (CNTs) [11,18,33,39,[41][42][43][44][45][46][47][48][49][50][51][52] and graphene [9,10,30,31,40,51,[53][54][55][56][57][58][59][60][61] in the development of FTSS.Carbon nanotubes, a type of quasi-1D structures with high aspect ratios, have been developed in the formation of percolation conducting networks for elastic strain sensors. [22] The high elasticity in such sensors can be attributed to the homogeneous propagation of microcracks in CNT films and extendable lateral space among aligned CNTs. Both the pressure and tensile strain sensors made of CNTs that utilize the capacitive effect can sustain strains up to 300%. [18,41] The working principle of such sensors, however, limits the gauge factor (GF) up to 1, [22] where the GF is a parameter used to characterize the strain sensitivity of resistive strain sensors and is given by GF = (R − R 0 )/(R 0 ε) and ε is strain. By employing the piezoresistive mechanism, a class of wearable and stretchable devices fabricated from thin films of aligned single-walled carbon nanotubes on PDMS substrates can provide a large range of strains up to 410% and improved GF up to 12. [11,62] A GF as high as 35 can be achieved at a strain of 1%. [44] It can be found that the CNTbased strain sensors usually exhibit high tolerance in strains while low GFs. In contrast, the excellent piezoresistive properties of 3D graphene foams with monolithic porous structures allow strain sensors constructed from these materials offering much higher GFs. [22] Chen et al. fabricated 3D interconnected graphene networks using chemical vapor deposition (CVD) and embedded these networks in a PDMS matrix to create strain sensors that withstand tensile strains up to 95% and provide a GF of 2. [26] Graphene in nanocellulose nanopapers show aThe design and fabrication of various types of flexible, portable, and foldable devices have received immense interest owing to the remarkable potential in impacting peoples' lives including real-time health monitoring, pointof-care diagnosis, and athletic training. In this work, the authors present 3D graphite as the key sensing ...

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“…In contrast, the soft-template method refers to utilizings elfassembled soft templates to obtain porous structure through condensation and carbonization.S omee asily removed templates are also employed in soft-template systems, such as emulsion droplets, [56] micelles, [57] vesicles, [58] and gas bubbles, [59] which usually originate from additives like polymers and surfactants. For examples, Zhang, with his co-authors, [60] employed as elf-assembled soft-template to obtain MXene-derived layer-by-layer ordered mesoporous carbon, based on phenol-formaldehyde resol as carbon source.T he as-fabricated ordered mesoporous carbon (OMC) electrode showed excellent specific capacitance of 240 Fg À1 at 1Ag À1 even with ah igh mass loading of 12 mg cm À2 .M ore importantly,t he assembled symmetric CSCs exhibited an outstanding capacitance of 162 Fg À1 at 1Ag À1 in 6 m KOH electrolyte.…”

Section: Template-assisted Methodsmentioning

confidence: 99%

Designing Carbon Based Supercapacitors with High Energy Density: A Summary of Recent Progress

Han

Lai

Wang

et al. 2018

Chemistry A European J

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Carbon based supercapacitors (CSCs), with high output power and long lifespan, are considered as promising power sources for modern electronic devices. The rush to find new approaches for optimizing their electrochemical behaviors is still vibrant, and particularly, widespread enthusiasm was focused on improving the energy density of CSCs through improving the specific capacitance and expanding the operating voltage. In this regard, this article provides a brief review about recent progress and new understanding about the assembly of CSCs with high energy density. Novel applied strategies were highlighted and discussed from the aspects of electrolyte, electrodes, and device modulation. Dynamic and mechanism factors associated with the energy storage process of CSCs are particularly emphasized. Finally, the opportunities and challenges are elaborated in the hope of guiding the promising direction for the design of high-energy CSCs.

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Wide‐Range Strain Sensors Based on Highly Transparent and Supremely Stretchable Graphene/Ag‐Nanowires Hybrid Structures

Cited by 86 publications

References 31 publications

Roles of Oxygen and Hydrogen in Crystal Orientation Transition of Copper Foils for High-Quality Graphene Growth

Roles of Oxygen and Hydrogen in Crystal Orientation Transition of Copper Foils for High-Quality Graphene Growth

3D Graphite–Polymer Flexible Strain Sensors with Ultrasensitivity and Durability for Real‐Time Human Vital Sign Monitoring and Musical Instrument Education

Designing Carbon Based Supercapacitors with High Energy Density: A Summary of Recent Progress

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