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Design and fabrication of single-walled carbon nanonet flexible strain sensors.

Huang YT, Huang SC, Hsu CC, Chao RM, Vu TK - Sensors (Basel) (2012)

Bottom Line: All of the micro-fabrication was compatible with the standard IC process.Experimental results indicated that the gauge factor of the proposed strain sensor was larger than 4.5, approximately 2.0 times greater than those of commercial gauges.The results also demonstrated that the gauge factor is small when the growth time of SWCNNs is lengthier, and the gauge factor is large when the line width of the serpentine pattern of SWCNNs is small.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan. yating3133@yahoo.com.tw

ABSTRACT
This study presents a novel flexible strain sensor for real-time strain sensing. The material for strain sensing is single-walled carbon nanonets, grown using the alcohol catalytic chemical vapor deposition method, that were encapsulated between two layers of Parylene-C, with a polyimide layer as the sensing surface. All of the micro-fabrication was compatible with the standard IC process. Experimental results indicated that the gauge factor of the proposed strain sensor was larger than 4.5, approximately 2.0 times greater than those of commercial gauges. The results also demonstrated that the gauge factor is small when the growth time of SWCNNs is lengthier, and the gauge factor is large when the line width of the serpentine pattern of SWCNNs is small.

No MeSH data available.


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Strain sensor design: (a) 3D diagram (b) dimension of SWCNNs pattern.
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f1-sensors-12-03269: Strain sensor design: (a) 3D diagram (b) dimension of SWCNNs pattern.

Mentions: The commercial strain sensors were assembled by wire, metal foil (sensing element), laminate film (waterproof layer), and a base substrate. The resistance of the metal foil gauge changes with strain during stress loading, and the strain can be determined by the change in electrical resistance. A serpentine pattern is commonly used for commercial strain sensors. In this study, we used single-walled carbon nanonets (SWCNNs) to replace the customary metal foil. Parylene-C was used as the waterproof layer, and another layer of Parylene-C was used as the base (Figure 1(a)). Further, to determine the Gauge Factor scale-down effects for the CNNs under different geometries, a serpentine pattern with different numbers of turns, a constant length and various widths of CNN was designed (Figure 1(b)).


Design and fabrication of single-walled carbon nanonet flexible strain sensors.

Huang YT, Huang SC, Hsu CC, Chao RM, Vu TK - Sensors (Basel) (2012)

Strain sensor design: (a) 3D diagram (b) dimension of SWCNNs pattern.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376622&req=5

f1-sensors-12-03269: Strain sensor design: (a) 3D diagram (b) dimension of SWCNNs pattern.
Mentions: The commercial strain sensors were assembled by wire, metal foil (sensing element), laminate film (waterproof layer), and a base substrate. The resistance of the metal foil gauge changes with strain during stress loading, and the strain can be determined by the change in electrical resistance. A serpentine pattern is commonly used for commercial strain sensors. In this study, we used single-walled carbon nanonets (SWCNNs) to replace the customary metal foil. Parylene-C was used as the waterproof layer, and another layer of Parylene-C was used as the base (Figure 1(a)). Further, to determine the Gauge Factor scale-down effects for the CNNs under different geometries, a serpentine pattern with different numbers of turns, a constant length and various widths of CNN was designed (Figure 1(b)).

Bottom Line: All of the micro-fabrication was compatible with the standard IC process.Experimental results indicated that the gauge factor of the proposed strain sensor was larger than 4.5, approximately 2.0 times greater than those of commercial gauges.The results also demonstrated that the gauge factor is small when the growth time of SWCNNs is lengthier, and the gauge factor is large when the line width of the serpentine pattern of SWCNNs is small.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan. yating3133@yahoo.com.tw

ABSTRACT
This study presents a novel flexible strain sensor for real-time strain sensing. The material for strain sensing is single-walled carbon nanonets, grown using the alcohol catalytic chemical vapor deposition method, that were encapsulated between two layers of Parylene-C, with a polyimide layer as the sensing surface. All of the micro-fabrication was compatible with the standard IC process. Experimental results indicated that the gauge factor of the proposed strain sensor was larger than 4.5, approximately 2.0 times greater than those of commercial gauges. The results also demonstrated that the gauge factor is small when the growth time of SWCNNs is lengthier, and the gauge factor is large when the line width of the serpentine pattern of SWCNNs is small.

No MeSH data available.


Related in: MedlinePlus