| 摘要: | 本研究使用簡單的一步無模板水熱法(One-step Template-free Hydrothermal Method)製備出β-釩酸銀奈米線 (β-AgVO3 NWs)的一維材料，再透過一步紫外光照射聚合法 (one-step UV-irradiation photopolymerization)製備聚吡咯(PPy)/β-釩酸銀奈米線(β-AgVO3 NWs)複合材料的濕度感測器。
本研究製備出純的β-AgVO3 NWs、純的片狀PPy (PPy sheet)，以及三種不同比例的PPy/ β-AgVO3 NWs奈米複合材料。以X射線粉末繞射儀 (XRD)、傅立葉紅外線光譜儀 (FTIR)、掃描式電子顯微鏡 (SEM)探討PPy/ β-AgVO3 NWs的奈米複合材料的成分及表面特徵。並探討PPy的添加量對於濕度感測器的電性及濕度感測特性的影響。由本研究的結果得知，0.1g β-AgVO3 NWs +0.5mL Py的濕度感測器有最佳的感度及線性值，因此以此比例做進一步的探討，如環境溫度、反應/回復時間對於阻抗變化的影響，最後再利用阻抗頻譜圖來說明本研究之奈米複合材料PPy/ β-AgVO3 NWs的反應傳導機制。
This study uses a simple one-step template-free hydrothermal method to prepare β-silver vanadate nanowires (β-AgVO3 NWs). Finally, one-step UV-irradiation photopolymerization process was employed to synthesize humidity sensors based on nanocomposites of polypyrrole (PPy) and β-AgVO3 NWs.
Pristine β-AgVO3 NWs, pristine PPy sheet, and three different ratios of PPy/β-AgVO3 NWs nanocomposites were synthesized. The compositions and surface characteristics of the PPy/β-AgVO3 NWs materials were analyzed using X-ray Diffractometer (XRD), Fourier-Transform Infrared Spectrometer (FTIR), and scanning electron microscope (SEM). The effect of the amount of added PPy on the electrical and humidity-sensing properties of the sensor was also investigated.
The results of this study indicate that the humidity sensor with a composition of 0.1g β-AgVO3 NWs and 0.5mL Py exhibited the best sensitivity and linearity. Therefore, this composition was further studied to investigate the effects of environmental temperature, response/recovery time on impedance changes. Finally, the impedance spectrum was used to explain the humidity-sensing mechanism of the PPy/β-AgVO3 NWs materials in this study. |
