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可调灵敏度和灵活性被认为是未来压力传感器或电子皮肤的两个关键特性。 通过理论计算模型,模拟了灵敏度与不同间距的PDMS金字塔之间的关系曲线,发现金字塔的间距是影响电容式压力传感器灵敏度的主要因素。 此外,我们使用石墨烯电极和具有不同间距的PDMS金字塔电介质层制造了电容压力传感器。 测量数据与仿真结果一致,灵敏度随着金字塔的间距而增加。 此外,石墨烯电极表现出完美的柔韧性和可靠性,而ITO电极在弯曲后会Swift被破坏。 这些石墨烯压力传感器在可穿戴产品中具有监测呼吸,脉搏和其他生理信号的潜力。
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Accepted Manuscript
Tunable-Sensitivity Flexible Pressure Sensor based on Graphene Transparent
Electrode
Shi Luo, Jun Yang, Xuefen Song, Xi Zhou, Leyong Yu, Tai Sun, Chongsheng
Yu, Deping Huang, Chunlei Du, Dapeng Wei
PII: S0038-1101(17)30883-3
DOI: https://doi.org/10.1016/j.sse.2018.04.003
Reference: SSE 7419
To appear in:
Solid-State Electronics
Received Date: 24 November 2017
Revised Date: 16 March 2018
Accepted Date: 15 April 2018
Please cite this article as: Luo, S., Yang, J., Song, X., Zhou, X., Yu, L., Sun, T., Yu, C., Huang, D., Du, C., Wei,
D., Tunable-Sensitivity Flexible Pressure Sensor based on Graphene Transparent Electrode, Solid-State
Electronics (2018), doi: https://doi.org/10.1016/j.sse.2018.04.003
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers
we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and
review of the resulting proof before it is published in its final form. Please note that during the production process
errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Tunable-Sensitivity Flexible Pressure Sensor based on Graphene
Transparent Electrode
Shi Luo,
1,2
Jun Yang,
1
* Xuefen Song,
1
Xi Zhou,
1,2
Leyong Yu,
1
Tai Sun,
1
Chongsheng Yu,
1
Deping
Huang,
1
Chunlei Du
1
and Dapeng Wei
1,2
*
1
Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Tech-
nology, Chinese Academy of Sciences, Chongqing 400714, PR China.
2
University of Chinese Academy of Sciences, Beijing, 100049, PR China
E-mail: dpwei@cigit.ac.cn;
Abstract
Tunable-sensitivity and flexibility are considered as two crucial characteristics for future pressure sensors or electronic skins.
By the theoretical calculation model, we simulated the relationship curve between the sensitivity and PDMS pyramids with
different spacings, and found that the spacing of pyramids is a main factor to affect the sensitivity of the capacitance pressure
sensor. Furthermore, we fabricated the capacitance pressure sensors using graphene electrodes and the PDMS pyramid die-
lectric layers with different spacings. The measurement data were consistent with the simulation results that the sensitivity
increases with the spacing of pyramids. In addition, graphene electrode exhibits prefect flexibility and reliability, while the
ITO electrode would be destroyed rapidly after bending. These graphene pressure sensors
exhibit the potential in the ap-
plication in the wearable products for monitoring breath, pulse, and other
physiological signals.
Keywords: graphene electrodes, pressure sensor, tunable sensitivity, flexibility.
1. Introduction
Recent years, flexible pressure sensor has attracted an
amount of interest, owing to increasing demand over the
last decades. Flexible pressure sensors could work as hu-
man’s skin, and have potential in a lot of application fields,
including robotic arms,[1-4] flexible electronic devices,[5-9]
wearable devices,[10-14] health monitoring[15-18], hu-
man-machine interaction[19-21]. These pressure sensors
have different sensing mechanics, including capacitive [11,
20, 22], resistive[21, 23, 24],piezoelectric[25, 26] and so
on. Among them, capacitive sensors have unique ad-
vantages in terms of stability, low power consumption and
fast response. At present, scientists have been able to im-
prove the sensitivity mainly by microstructure of electrode
and dielectric layer.[4,27] Yong taek Hong reported that
silver nanowires was covered on PDMS substrate with rip-
ple structures as an electrode[27], and these pressure sen-
sors achieved a high sensitivity (3.8KPa
-1
). Later, they im-
proved the sensitivity to 9.9 KPa
-1
by the spacing structure
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