Carbon nanotube;
gas sensor;
hydrogen;
high sensitive;
dielectrophoretic;
PALLADIUM;
PERFORMANCE;
FILMS;
D O I:
10.1080/20550324.2021.1977063
中图分类号:
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
In this study, an inexpensive simple method for the fabrication of efficient hydrogen (H-2) gas sensor based on carbon nanotubes (CNTs) was presented. The CNTs were synthesized using microwave oven and deposited onto SiO2 substrate by a dielectrophoretic method. The as-grown CNTs showed an n-type behavior because CNTs possess the characters of both metallic and semiconductor when placed between the two electrodes, meanwhile, the current was directed mostly by metallic tubes. Upon exposure to H-2 gas at room temperature, the CNTs exhibited high sensitivity up to 315% at 140 ppm H-2, and relatively good sensitivity of 40% at a very low H-2 gas concentration of 20 ppm. To the best of our knowledge, this is the first work involving the fabrication of CNTs for detecting a low H-2 gas concentration of 20 ppm at RT with high sensitivity comparing with other previous studies. [GRAPHICS]
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Tikrit Univ, Collage Educ, Dept Phys, Tikrit, IraqUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Abdullah, Q. N.
Yam, F. K.
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机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Yam, F. K.
Hassan, J. J.
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机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Hassan, J. J.
Chin, C. W.
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h-index: 0
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Chin, C. W.
Hassan, Z.
论文数: 0引用数: 0
h-index: 0
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Tikrit Univ, Collage Educ, Dept Phys, Tikrit, IraqUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Abdullah, Q. N.
Yam, F. K.
论文数: 0引用数: 0
h-index: 0
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Yam, F. K.
Hassan, J. J.
论文数: 0引用数: 0
h-index: 0
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Hassan, J. J.
Chin, C. W.
论文数: 0引用数: 0
h-index: 0
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia
Chin, C. W.
Hassan, Z.
论文数: 0引用数: 0
h-index: 0
机构:
USM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, MalaysiaUSM, Sch Phys, Nanooptoelect Res & Technol Lab, George Town 11800, Malaysia