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아미노산을 이용한 망간 산화물 기공성 나노 구조의 합성 및 C_3H_8 가스에 대한 선택적 감응 특성Preparation of Manganese Oxide Porous Nanostructures using Amino-acid and its Selective C_3H_8 Sensing Properties
- Other Titles
- Preparation of Manganese Oxide Porous Nanostructures using Amino-acid and its Selective C_3H_8 Sensing Properties
- Issue Date
- 2011
- Publisher
- 한국센서학회
- Keywords
- Manganese oxide; C_3H_8; Selectivity; Gas sensors
- Citation
- 센서학회지, v.20, no.1, pp.64 - 69
- Indexed
- KCI
- Journal Title
- 센서학회지
- Volume
- 20
- Number
- 1
- Start Page
- 64
- End Page
- 69
- ISSN
- 1225-5475
- Abstract
- Porous manganese oxide porous nanostructures were prepared by amino-acid-mediated solvothermal self assembly reaction and subsequent heat treatment at 600℃. When Mn-precursors were heat-treated at 400 - 550℃, the sensors did not show significant gas responses. In contrast, the manganese oxide heat-treated at 600℃ showed the significant gas responses, that is, the resistance decrease to 100 ppm C_3H_8 (R_a/R_g = 2.17, R_a : resistance in air, R_g : resistance in gas) and the resistance increase to 100 ppm C_2H_5OH (R_g/R_a = 1.92). The opposite change of resistance upon exposure to C_3H_8 and C_2H_5OH was discussed in relation to the mixed phases of manganese oxides with different valences.
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