Silica-titania nanocomposite based fiber optic sensor for aromatic hydrocarbons detection
Surface stability of deposited sensing material is becoming a crucial issue in the field of opto-chemical sensor technology due to cracks/stresses. Porous silica-titania (ST) nanocomposite coating material is synthesized and doped with CdTe as transducers for sensing cyclic compounds. Ultra-thin coa...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| 格式: | Article |
| 出版: |
Elsevier B.V.
2020
|
| 主題: | |
| 在線閱讀: | http://eprints.utm.my/id/eprint/93802/ http://dx.doi.org/10.1016/j.optcom.2020.125825 |
| 標簽: |
添加標簽
沒有標簽, 成為第一個標記此記錄!
|
| 機構: | Universiti Teknologi Malaysia |
| 總結: | Surface stability of deposited sensing material is becoming a crucial issue in the field of opto-chemical sensor technology due to cracks/stresses. Porous silica-titania (ST) nanocomposite coating material is synthesized and doped with CdTe as transducers for sensing cyclic compounds. Ultra-thin coatings are obtained, ∼11 nm for ST nanocomposite, and 5 nm for encapsulated and heat-treated samples. BET analysis shows large surface area ∼441 m2/g ± 3 m2/g and pore diameter 58 Å of ST nanocomposite. It decreases down to ∼410 m2/g ± 2 m2/g, and pore diameter to 24 Å, after encapsulation. However, after heat treatment, it again increases up to 419 m2/g ± 2 m2/g and pore diameter to 38 Å. The sensitivity of 71.37 counts per unit change in the carbon chain with correlation determination coefficient R2 ∼0.89 at 468 nm is observed. The prepared sensor device shows excellent stability, signal-to-noise ratio, and good reversibility towards different hydrocarbons and non-hydrocarbons (inorganic materials). |
|---|