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Fabrication of high sensitivity carbon microcoil pressure sensors.

Su CC, Li CH, Chang NK, Gao F, Chang SH - Sensors (Basel) (2012)

Bottom Line: This work demonstrates a highly sensitive pressure sensor that was fabricated using carbon microcoils (CMCs) and polydimethylsiloxane (PDMS).The pressure sensor has a sandwiched structure, in which the as-grown CMCs were inserted between two PDMS layers.The pressure sensor exhibits piezo-resistivity changes in response to mechanical loading using a load cell system.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan. r92522629@ntu.edu.tw

ABSTRACT
This work demonstrates a highly sensitive pressure sensor that was fabricated using carbon microcoils (CMCs) and polydimethylsiloxane (PDMS). CMCs were grown by chemical vapor deposition using various ratios of Fe-Sn catalytic solution. The pressure sensor has a sandwiched structure, in which the as-grown CMCs were inserted between two PDMS layers. The pressure sensor exhibits piezo-resistivity changes in response to mechanical loading using a load cell system. The yields of the growth of CMCs at a catalyst proportion of Fe:Sn = 95:5 reach 95%. Experimental results show that the sensor achieves a high sensitivity of 0.93%/kPa from the CMC yield of 95%. The sensitivity of the pressure sensor increases with increasing yield of CMCs. The demonstrated pressure sensor shows the advantage of high sensitivity and is suitable for mass production.

No MeSH data available.


Related in: MedlinePlus

SEM images of the as-grown CMCs/CNFs from Fe-Sn powder catalyst at Fe-Sn mass ratios of (a) 80:20; (b) 85:15; (c) 90:10; (d) 95:5; and (e) 97:3.
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f2-sensors-12-10034: SEM images of the as-grown CMCs/CNFs from Fe-Sn powder catalyst at Fe-Sn mass ratios of (a) 80:20; (b) 85:15; (c) 90:10; (d) 95:5; and (e) 97:3.

Mentions: Figure 2 presents SEM images of the morphology of the as-grown CMCs/CNFs at various Fe-Sn catalytic solutions. The mass ratio of Fe-Sn was controlled from 80:20 to 97:3 to determine the optimum proportion for the growth of CMCs. No CMCs were grown from the powder catalyst with a Fe-Sn ratio of 80:20. However, when the Fe-Sn ratio was controlled in the range of 95:5 to 97:3, CMCs were the main products. These results suggest that the optimal mass ratio of Fe-Sn was 95:5.


Fabrication of high sensitivity carbon microcoil pressure sensors.

Su CC, Li CH, Chang NK, Gao F, Chang SH - Sensors (Basel) (2012)

SEM images of the as-grown CMCs/CNFs from Fe-Sn powder catalyst at Fe-Sn mass ratios of (a) 80:20; (b) 85:15; (c) 90:10; (d) 95:5; and (e) 97:3.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472814&req=5

f2-sensors-12-10034: SEM images of the as-grown CMCs/CNFs from Fe-Sn powder catalyst at Fe-Sn mass ratios of (a) 80:20; (b) 85:15; (c) 90:10; (d) 95:5; and (e) 97:3.
Mentions: Figure 2 presents SEM images of the morphology of the as-grown CMCs/CNFs at various Fe-Sn catalytic solutions. The mass ratio of Fe-Sn was controlled from 80:20 to 97:3 to determine the optimum proportion for the growth of CMCs. No CMCs were grown from the powder catalyst with a Fe-Sn ratio of 80:20. However, when the Fe-Sn ratio was controlled in the range of 95:5 to 97:3, CMCs were the main products. These results suggest that the optimal mass ratio of Fe-Sn was 95:5.

Bottom Line: This work demonstrates a highly sensitive pressure sensor that was fabricated using carbon microcoils (CMCs) and polydimethylsiloxane (PDMS).The pressure sensor has a sandwiched structure, in which the as-grown CMCs were inserted between two PDMS layers.The pressure sensor exhibits piezo-resistivity changes in response to mechanical loading using a load cell system.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan. r92522629@ntu.edu.tw

ABSTRACT
This work demonstrates a highly sensitive pressure sensor that was fabricated using carbon microcoils (CMCs) and polydimethylsiloxane (PDMS). CMCs were grown by chemical vapor deposition using various ratios of Fe-Sn catalytic solution. The pressure sensor has a sandwiched structure, in which the as-grown CMCs were inserted between two PDMS layers. The pressure sensor exhibits piezo-resistivity changes in response to mechanical loading using a load cell system. The yields of the growth of CMCs at a catalyst proportion of Fe:Sn = 95:5 reach 95%. Experimental results show that the sensor achieves a high sensitivity of 0.93%/kPa from the CMC yield of 95%. The sensitivity of the pressure sensor increases with increasing yield of CMCs. The demonstrated pressure sensor shows the advantage of high sensitivity and is suitable for mass production.

No MeSH data available.


Related in: MedlinePlus