All-graphene strain sensor on soft substrate

Chun, Sungwoo; Choi, Yeonjoo; Park, Wanjun

doi:10.1016/j.carbon.2017.02.058

Cited by 170 publications

(114 citation statements)

References 36 publications

Supporting

Mentioning

113

Contrasting

Order By: Relevance

“…Due to its unique electrical, mechanical, optical, and thermal properties, graphene, a 2D monolayer of sp 2 ‐bonded carbon atoms, has been the focus of a vast number of scientific researches . For decades, tremendous effort has been undertaken to integrate graphene and related materials into real‐world applications to make use of such unique properties in high‐tech end products, such as transistors, light‐emitting diodes, strain sensor, solar cells, biosensor, and chemical/biological sensors . Although there are a number of different techniques in which graphene can be isolated, chemical vapor deposition (CVD) is by far the most promising way to produce structurally well‐defined graphene layers on relatively large areas.…”

Section: Introductionmentioning

confidence: 99%

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Çıtak

İstanbullu

Şakalak

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

In this study, the successful transfer of chemical vapor deposition (CVD)‐grown graphene on an ordinary printing paper surface is demonstrated. Pristine paper is not a suitable substrate for graphene transfer because of its fragile and hydrophilic nature against the chemicals used during the transfer process. Two different fluoroalkyl polymers, namely poly(hexafluorobutyl acrylate) (PHFBA) and poly(perfluorodecyl acrylate) (PPFDA) are coated on paper surfaces by an initiated CVD (iCVD) technique to make the paper surfaces hydrophobic. Hydrophobicity is found to be an important factor in order for the graphene to be transferred onto the paper substrate. Although surfaces coated with PPFDA possess better hydrophobicity owing to their longer perfluoroalkyl group and higher roughness, the graphene transfer is found to be more successful on a PHFBA‐coated surface. A thin film of PHFBA on the paper surface acts as a prime layer for effective and defect‐free transfer of graphene and makes the paper surface ideal and robust during the graphene transfer process. The as‐transferred graphene layer on the PHFBA‐coated paper surface shows high conductivity values, even after repeated folding and flattening cycles.

show abstract

Section: Introductionmentioning

confidence: 99%

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Çıtak

İstanbullu

Şakalak

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

show abstract

“…Notably, the sensor conductivity remained almost unchanged after stretching, indicating that the GNP network sandwiched between PDMS is highly stable and robust and that the conductance recovery is fast and consistent even at a high frequency. Figure 4(b) summarizes the gauge factors and maximum stretchabilities of previously reported flexible strain sensors [5,14,[26][27][28][29][30][31][32][33][34][35][36][37][38][39]. As indicated by the dashed line, the gauge factor and stretchability have a trade-off.…”

Section: Change Of Electro-mechanical Properties Of G-pdms Sensors Apmentioning

confidence: 99%

“…(b) Summary of the gauge factors and maximum stretchability of the flexible strain sensors. The dashed line indicates the correlation between the gauge factor and the maximum stretchability, which exhibits a tradeoff relationship[5,14,[26][27][28][29][30][31][32][33][34][35][36][37][38].…”

mentioning

confidence: 99%

Highly flexible graphene nanoplatelet-polydimethylsiloxane strain sensors with proximity-sensing capability

Lee

Kim

Lee

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Flexible strain sensors are essential for providing electronic skin with the ability to detect motions and pressure, enabling their use in health applications and robotics. In this context, strain sensors should simultaneously guarantee a high sensitivity and flexibility, with a fast response when applied to the detection of various human motions. Here, we demonstrate a flexible strain sensor made of graphene nanoplatelets encapsulated between two elastomer films with a high sensitivity and stretchability. The liquid-exfoliated graphene nanoplatelets were spray-coated on the first elastomer film and then encapsulated by the second elastomer film. The encapsulated graphene sensor exhibited a high gauge factor, fast responsivity, and high durability. It proved stretchable up to 290% and highly bendable (operating at almost zero bending radius). As an additional key feature, proximity sensing to detect remote motions of a distant object was demonstrated, owing to the unique characteristic of graphene, i.e., variations in its electrostatic in response to the interaction between the surface charges of the elastomer and the electrostatic charges of the remote object. Our work introduces a novel route for the fabrication of flexible graphene sensors with proximitysensing capability, which are useful for wearable smart devices and human motion detection.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Graphene is an important functional material in electronics, photoelectronics, and sensors for its ultrahigh carrier mobility, high thermal conductivity, and high transmittance. [1,2] Whichever aspect it is applied, good quality is a basic requirement. [3] Up to now, one of the most favored methods to fabricate graphene is low pressure chemical vapor deposition (LPCVD) because of the ease in fabricating single layer graphene by the self-limited growth mechanism and the lower nucleation density compared to ambient pressure chemical vapor deposition (APCVD).…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas Atmosphere in the Heating Stage on Limiting Nucleation of Graphene on Copper Foils by Low Pressure Chemical Vapor Deposition

Shi

Wang

Ren

et al. 2020

Crystal Research and Technology

View full text Add to dashboard Cite

To investigate the effect of gas atmosphere in the heating stage of graphene fabrication on graphene nucleation, hydrogen and nitrogen are introduced into the furnace respectively in the heating stage. The results show that graphene growing on copper foils heated in nitrogen atmosphere and in hydrogen atmosphere present different nucleation characteristics. The analysis implies that the gas atmosphere in the heating stage affects the graphene nucleation and growth by changing the morphology of the copper surface and the inherent carbon concentration in the substrate, and this change actually results from the interaction of the copper surface and the gas atmosphere. The difference in size and quality of the fabricated graphene domains also indicates nitrogen atmosphere in the heating stage favors fabricating large‐sized graphene domains with good quality. Thus, substituting hydrogen for nitrogen in the heating stage would be a simpler and easier way to depress graphene nucleation as well as improve the graphene quality.

show abstract

All-graphene strain sensor on soft substrate

Cited by 170 publications

References 36 publications

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Highly flexible graphene nanoplatelet-polydimethylsiloxane strain sensors with proximity-sensing capability

Effect of Gas Atmosphere in the Heating Stage on Limiting Nucleation of Graphene on Copper Foils by Low Pressure Chemical Vapor Deposition

Contact Info

Product

Resources

About