Abstract
In this report, we investigated solution-processed graphene chemical sensors. A vacuum-annealing process after the graphene sheets were deposited on the wafer enhanced the response and sensitivity of the sensors by increasing the number of pristine sites on graphene. The presence of defect sites with higher binding energies and lower populations was related with slow adsorption/desorption. In contrast, fast adsorption/desorption were observed from the pristine sites. A two-step adsorption/desorption mechanism was observed when graphene sheets were exposed to ammonia molecules.
| Original language | English |
|---|---|
| Pages (from-to) | 208-211 |
| Number of pages | 4 |
| Journal | Journal of Crystal Growth |
| Volume | 326 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 Jul 1 |
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Keywords
- A1. Annealing
- A1. Graphene
- A1. Sorption
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Chemistry
- Inorganic Chemistry
Cite this
Improved sorption characteristics of NH3 molecules on the solution-processed graphene sheets. / Ko, Geunwoo; Jung, Younghun; Lee, Kwan Young; Lee, Ki Bong; Kim, Ji Hyun.
In: Journal of Crystal Growth, Vol. 326, No. 1, 01.07.2011, p. 208-211.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Improved sorption characteristics of NH3 molecules on the solution-processed graphene sheets
AU - Ko, Geunwoo
AU - Jung, Younghun
AU - Lee, Kwan Young
AU - Lee, Ki Bong
AU - Kim, Ji Hyun
PY - 2011/7/1
Y1 - 2011/7/1
N2 - In this report, we investigated solution-processed graphene chemical sensors. A vacuum-annealing process after the graphene sheets were deposited on the wafer enhanced the response and sensitivity of the sensors by increasing the number of pristine sites on graphene. The presence of defect sites with higher binding energies and lower populations was related with slow adsorption/desorption. In contrast, fast adsorption/desorption were observed from the pristine sites. A two-step adsorption/desorption mechanism was observed when graphene sheets were exposed to ammonia molecules.
AB - In this report, we investigated solution-processed graphene chemical sensors. A vacuum-annealing process after the graphene sheets were deposited on the wafer enhanced the response and sensitivity of the sensors by increasing the number of pristine sites on graphene. The presence of defect sites with higher binding energies and lower populations was related with slow adsorption/desorption. In contrast, fast adsorption/desorption were observed from the pristine sites. A two-step adsorption/desorption mechanism was observed when graphene sheets were exposed to ammonia molecules.
KW - A1. Annealing
KW - A1. Graphene
KW - A1. Sorption
UR - http://www.scopus.com/inward/record.url?scp=79960183347&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79960183347&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2011.01.099
DO - 10.1016/j.jcrysgro.2011.01.099
M3 - Article
AN - SCOPUS:79960183347
VL - 326
SP - 208
EP - 211
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 1
ER -