設施農業：智慧感測【光電工程研究所/裴靜偉特聘教授】
| 論文篇名 | 英文：Solution processed, vertically aligned, AZO nanocolumn array for chemiresistive sensor application with UV-enhanced sensitivity 中文：應用溶液製程縱向排列氧化鋅鋁奈米柱陣列紫外光增強化學電阻感測器 |
| 期刊名稱 | CERAMICS INTERNATIONAL |
| 發表年份,卷數,起迄頁數 | 2020, 46 (14): 21925-21931 |
| 作者 | Kumar, Dinesh; Pei, Zingway(裴靜偉)* |
| DOI | 10.1016/j.ceramint.2020.04.162 |
| 中文摘要 | 在這項工作中，已經開發了一種基於AZO奈米柱陣列膜的寬靈敏度感測器。這是為了在紫外線照射下室內檢測H2O2。採用具有成本效益的一步多層生長技術來合成AZO奈米柱陣列。通過掃描電子顯微鏡（SEM），透射電子顯微鏡（TEM）和透射電子顯微鏡（TEM）進行了實驗研究。然後X射線衍射證實AZO柱陣列緊密堆積，連接，垂直排列和多晶，具有高表面積。這種結構比在隨機和分離的奈米線結構上具有更好的導電性。霍爾效應測量表明，AZO膜為n型，具有高電導率（3.60×103Ωcm），高載流子密度（11.3×1020cm-3）和可接受的遷移率（0.95 cm2 / Vs）。 X射線光發射光譜表明，AZO膜在薄膜的皮層處由大量吸附的氧相關物質組成，這對感測器至關重要。通過紫外線激活，基於AZO奈米柱陣列的感測器在室溫下表現出增強的H2O2檢測性能。在15μM至30 mM的濃度下，通過相對響應評估的H2O2敏感性從15％顯著提高至36％。在環境條件和寬範圍傳感下的操作表明，這種化學電阻性AZO感測器足以用於生物醫學和環境應用。 |
| 英文摘要 | In this work, a wide and highly sensitive chemiresistive sensor has been developed based on the AZO nanocolumn array film. This is meant for the room detection of H2O2 under UV illumination. A cost-effective one step multi-layers growth process was adopted for the synthesis of the AZO nanocolumn array. The experimental studies were done by scanning electron microscopy (SEM), transmission and electron microscopy (TEM).Then X-ray diffraction confirmed that the AZO column array was closely packed, connected, vertically aligned, and polycrystalline, with a high surface area. This structure ensures better electrical conduction over random and separated nanostructures. The hall-effect measurement indicates that the AZO film was n-type, with high conductivity (3.60 × 103 Ωcm), high carrier density (11.3 × 1020cm−3) and with acceptable mobility (0.95 cm2/Vs). The x-ray photoemission spectroscopy suggests that the AZO film consists of a large amount of adsorbed oxygen-related species at the sheath layer of the thin-film, which is vital for sensors. By the UV light activation, sensors based on the AZO nanocolumn array exhibited enhanced H2O2 detection properties at room temperature. At a concentration from 15 μM to 30 mM, H2O2 sensitivity evaluated by relative response was remarkably increased from 15% to 36%. The operation under ambient conditions and wide range sensing shows that this chemiresistive AZO sensor is adequate for biomedical and environmental applications. |
