Abstract
This paper demonstrates a new kind of hydrogen sensor using palladium (Pd) nanowires. Hydrogen sensors using Pd metal have usually been utilizing the incremental change in electrical resistance of Pd upon hydrogen incorporation. Unlike the conventional Pd hydrogen sensors, however, the electrical resistance of the present Pd nanowire sensor decreases when hydrogen is incorporated into' Pd nanowires. It is considered to. be due to swelling of the nanowires as the result of hydrogen incorporation and subsequent narrowing of gaps between the nanowires, even though each nanowire should have had the higher resistance inherently. Because of extraordinarily high surface area of nanowires, the performance of sensing the hydrogen concentration was found to superior by far to the conventional Pd sensors. The response and recovery times are quite fast to be about 0.7 and 20 s, respectively and the sensing range of 0.2 - 1% hydrogen concentration is suitable for the hydrogen safety sensors. The sensor introduced in this paper is unique with regard to both the sensing mechanism and performance.
| Original language | English |
|---|---|
| Pages (from-to) | 509-513 |
| Number of pages | 5 |
| Journal | IEEE Sensors Journal |
| Volume | 6 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2006 Jun 1 |
| Externally published | Yes |
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Keywords
- Anodized aluminum oxide (AAO) template
- Hydrogen sensor
- Pd nanowire
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
Hydrogen gas sensor using Pd nanowires electro-deposited into anodized alumina template. / Kyun, Tae Kim; Sim, Sang Jun; Sung, Min Cho.
In: IEEE Sensors Journal, Vol. 6, No. 3, 01.06.2006, p. 509-513.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hydrogen gas sensor using Pd nanowires electro-deposited into anodized alumina template
AU - Kyun, Tae Kim
AU - Sim, Sang Jun
AU - Sung, Min Cho
PY - 2006/6/1
Y1 - 2006/6/1
N2 - This paper demonstrates a new kind of hydrogen sensor using palladium (Pd) nanowires. Hydrogen sensors using Pd metal have usually been utilizing the incremental change in electrical resistance of Pd upon hydrogen incorporation. Unlike the conventional Pd hydrogen sensors, however, the electrical resistance of the present Pd nanowire sensor decreases when hydrogen is incorporated into' Pd nanowires. It is considered to. be due to swelling of the nanowires as the result of hydrogen incorporation and subsequent narrowing of gaps between the nanowires, even though each nanowire should have had the higher resistance inherently. Because of extraordinarily high surface area of nanowires, the performance of sensing the hydrogen concentration was found to superior by far to the conventional Pd sensors. The response and recovery times are quite fast to be about 0.7 and 20 s, respectively and the sensing range of 0.2 - 1% hydrogen concentration is suitable for the hydrogen safety sensors. The sensor introduced in this paper is unique with regard to both the sensing mechanism and performance.
AB - This paper demonstrates a new kind of hydrogen sensor using palladium (Pd) nanowires. Hydrogen sensors using Pd metal have usually been utilizing the incremental change in electrical resistance of Pd upon hydrogen incorporation. Unlike the conventional Pd hydrogen sensors, however, the electrical resistance of the present Pd nanowire sensor decreases when hydrogen is incorporated into' Pd nanowires. It is considered to. be due to swelling of the nanowires as the result of hydrogen incorporation and subsequent narrowing of gaps between the nanowires, even though each nanowire should have had the higher resistance inherently. Because of extraordinarily high surface area of nanowires, the performance of sensing the hydrogen concentration was found to superior by far to the conventional Pd sensors. The response and recovery times are quite fast to be about 0.7 and 20 s, respectively and the sensing range of 0.2 - 1% hydrogen concentration is suitable for the hydrogen safety sensors. The sensor introduced in this paper is unique with regard to both the sensing mechanism and performance.
KW - Anodized aluminum oxide (AAO) template
KW - Hydrogen sensor
KW - Pd nanowire
UR - http://www.scopus.com/inward/record.url?scp=33947181390&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947181390&partnerID=8YFLogxK
U2 - 10.1109/JSEN.2006.874456
DO - 10.1109/JSEN.2006.874456
M3 - Article
AN - SCOPUS:33947181390
VL - 6
SP - 509
EP - 513
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
SN - 1530-437X
IS - 3
ER -