scholarly journals Highly Aligned, Anisotropic Carbon Nanofiber Films for Multidirectional Strain Sensors with Exceptional Selectivity

2019 ◽  
Vol 29 (37) ◽  
pp. 1905565 ◽  
Author(s):  
Jeng‐Hun Lee ◽  
Jungmo Kim ◽  
Dan Liu ◽  
Fengmei Guo ◽  
Xi Shen ◽  
...  
Keyword(s):  
Carbon Nanofiber ◽  
Strain Sensors

Novel Electrically Conductive Porous PDMS/Carbon Nanofiber Composites for Deformable Strain Sensors and Conductors

2017 ◽  
Vol 9 (16) ◽  
pp. 14207-14215 ◽  
Author(s):  
Shuying Wu ◽  
Jin Zhang ◽  
Raj B. Ladani ◽  
Anil R. Ravindran ◽  
Adrian P. Mouritz ◽  
...  
Keyword(s):  
Carbon Nanofiber ◽  
Strain Sensors ◽  
Electrically Conductive

Highly Aligned, Anisotropic Carbon Nanofiber Films for Multidirectional Strain Sensors with Exceptional Selectivity

2019 ◽  
Vol 29 (29) ◽  
pp. 1901623 ◽  
Author(s):  
Jeng‐Hun Lee ◽  
Jungmo Kim ◽  
Dan Liu ◽  
Fengmei Guo ◽  
Xi Shen ◽  
...  
Keyword(s):  
Carbon Nanofiber ◽  
Strain Sensors

Cyclic piezoresistive effect in poly(dimethylsiloxane)/carbon nanofiber composites for large strain Sensing applications

2019 ◽  
Vol 30 (7) ◽  
pp. 1010-1017
Author(s):  
M Lu ◽  
MH Chen ◽  
ZX Bu ◽  
LS Wang ◽  
L Sun
Keyword(s):  
Carbon Nanomaterials ◽  
Carbon Nanofiber ◽  
Large Strain ◽  
Temperature Stability ◽  
Strain Sensors ◽  
Strain Sensing ◽  
One Dimensional ◽  
Sensing Applications ◽  
Different Temperatures ◽  
Carbon Nanofiller

Adding conductive one-dimensional carbon nanomaterials to poly(dimethysiloxane) can form bio-compatible composites with significant electromechanical (piezoresistive) response. This effect can be effectively tuned by controlling the carbon nanofiller size, concentration, and distribution. However, to be applied as strain sensors, the composite material has to meet mechanical, sensitivity, temperature stability, and reliability requirements. Here we report on the study of cyclic electromechanical behaviors of poly(dimethysiloxane)/carbon nanofiber composites under different temperatures. Through mechanical training, reproducible and sensitive piezoresistive response suitable for large strain sensing can be obtained.

Carbon Nanofiber Reinforced Strain Sensors with High Breathability and Anisotropic Sensitivity

2021 ◽  
Author(s):  
Shuhua Peng ◽  
Shuying Wu ◽  
Yuyan Yu ◽  
Zhao Sha ◽  
Guang Li ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Carbon Nanofiber ◽  
Wearable Sensors ◽  
Metal Films ◽  
Strain Sensors ◽  
Thin Metal ◽  
Thin Metal Films ◽  
Direct Deposition ◽  
Elastic Substrates

Direct deposition of thin metal films on highly elastic substrates is a major technique to fabricate flexible electronics such as wearable sensors, stretchable transistors, and deformable displays. However, these devices...

Highly Stretchable Dry Electrode Composited with Carbon Nanofiber (CNF) for Wearable Device

2020 ◽  
Vol 20 (8) ◽  
pp. 4708-4713
Author(s):  
Dong-Hyun Beak ◽  
Hachul Jung ◽  
Dahye Kwon ◽  
Seung-A Lee ◽  
SongWoo Yoon ◽  
...  
Keyword(s):  
Carbon Nanofiber ◽  
Electric Circuit ◽  
Strain Sensors ◽  
Wearable Device ◽  
Electromechanical Property ◽  
Simple Method ◽  
Dry Electrode ◽  
Stretchable Electrode ◽  
Highly Stretchable ◽  
Electrocardiogram Ecg

In this work, we present a highly stretchable dry electrode composited with carbon nanofiber (CNF) for wearable device by simple method. The fabricated electrodes were assembled with snap connector for connect with electric circuit and sticky polymer for improving adhesion strength on the skin. We evaluated the electrical and mechanical properties depending on the weight % (wt%) and thickness of CNF/elastomer composited stretchable electrode. From the results, the electrical characteristic was improved as increasing concentrations of CNF and their dropping volume. And we evaluated a stretchability and electromechanical property using with cycling test. Through these tests, we have demonstrated that fabricated dry electrode has outstanding stretchability and durability under stretching condition. Finally, electrocardiogram (ECG) was measured with these electrodes. The results of ECG measurement showed similar or larger signal that of commercial wet electrode. Consequently, these results are expected to apply as a wearable device such as a bio-signal measurement and strain sensors.

Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

2003 ◽  
Vol 774 ◽  
Author(s):  
Janice L. McKenzie ◽  
Michael C. Waid ◽  
Riyi Shi ◽  
Thomas J. Webster
Keyword(s):  
Carbon Fiber ◽  
Surface Energy ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Carbon Nanofiber ◽  
Fiber Composite ◽  
Scar Tissue ◽  
Pc 12 Cells ◽  
Low Surface Energy ◽  
Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

Cytocompatibility and Material Properties of Poly-carbonate Urethane/Carbon Nanofiber Composites for Neural Applications

2003 ◽  
Vol 774 ◽  
Author(s):  
Janice L. McKenzie ◽  
Michael C. Waid ◽  
Riyi Shi ◽  
Thomas J. Webster
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanofibers ◽  
Material Properties ◽  
Carbon Nanofiber ◽  
Scar Tissue ◽  
Tissue Response ◽  
Positive Interactions ◽  
Weight Percentage ◽  
Poly Carbonate

AbstractCarbon nanofibers possess excellent conductivity properties, which may be beneficial in the design of more effective neural prostheses, however, limited evidence on their cytocompatibility properties exists. The objective of the present in vitro study was to determine cytocompatibility and material properties of formulations containing carbon nanofibers to predict the gliotic scar tissue response. Poly-carbonate urethane was combined with carbon nanofibers in varying weight percentages to provide a supportive matrix with beneficial bulk electrical and mechanical properties. The substrates were tested for mechanical properties and conductivity. Astrocytes (glial scar tissue-forming cells) were seeded onto the substrates for adhesion. Results provided the first evidence that astrocytes preferentially adhered to the composite material that contained the lowest weight percentage of carbon nanofibers. Positive interactions with neurons, and, at the same time, limited astrocyte functions leading to decreased gliotic scar tissue formation are essential for increased neuronal implant efficacy.

Modeling of Contact Patch in Dual-Chamber Pneumatic Tires

2018 ◽  
Vol 46 (2) ◽  
pp. 78-92 ◽  
Author(s):  
A. I. Kubba ◽  
G. J. Hall ◽  
S. Varghese ◽  
O. A. Olatunbosun ◽  
C. J. Anthony
Keyword(s):  
Strain Sensors ◽  
Surface Strain ◽  
Wireless Data ◽  
Data Logger ◽  
Dual Chamber ◽  
Piezoelectric Polymer ◽  
Pure Rolling ◽  
Piezoelectric Elements ◽  
Strain Data ◽  
Deformation Patterns

ABSTRACT This study presents an investigation of the inner tire surface strain measurement by using piezoelectric polymer transducers adhered on the inner liner of the tire, acting as strain sensors in both conventional and dual-chamber tires. The piezoelectric elements generate electrical charges when strain is applied. The inner liner tire strain can be found from the generated charge. A wireless data logger was employed to measure and transmit the measured signals from the piezoelectric elements to a PC to store and display the readout signals in real time. The strain data can be used as a monitoring system to recognize tire-loading conditions (e.g., traction, braking, and cornering) in smart tire technology. Finite element simulations, using ABAQUS, were employed to estimate tire deformation patterns in both conventional and dual-chamber tires for pure rolling and steady-state cornering conditions for different inflation pressures to simulate on-road and off-road riding tire performances and to compare with the experimental results obtained from both the piezoelectric transducers and tire test rig.

ELECTROCHEMICAL DETECTION OF FLUOXETINE IN WATER USING A SILVER MODIFIED ZEOLITE-CARBON NANOFIBER ELECTRODE

2017 ◽  
Vol 16 (4) ◽  
pp. 829-836
Author(s):  
Florica Manea ◽  
Magdalena Ardelean ◽  
Aniela Pop ◽  
Rodica Pode ◽  
Joop Schoonman
Keyword(s):  
Electrochemical Detection ◽  
Carbon Nanofiber ◽  
Modified Zeolite
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