本實驗以具有位置規則性的聚3-己基噻吩(regioregular poly-(3-hexylthiophene)，rr-P3HT)或是混合聚3-烷基噻吩與十八烷胺(octadecylamine，ODA)作為Langmuir單分子層模板，藉由單分子層與奈米金粒子間的作用力，以及乙醇或氯化鈣添加的不穩定效應，將分散在水溶液中的金奈米粒子(AuNPs)吸附至氣/液界面，以製備P3HT/AuNPs混成薄膜。本實驗藉由單分子層的表面壓-面積(π-A)等溫曲線，穿透式電子顯微鏡(TEM)以及原子力顯微鏡(AFM)的觀察，來了解P3HT/AuNPs混合單分子層在氣/液界面上的行為及薄膜表面形態的變化。
由實驗結果顯示，P3HT在純水表面無法均勻地分散形成真正的單分子層，而會形成聚集結構。P3HT與金粒子具有化學作用力，由於此作用力屬於短程作用力，單獨以P3HT為吸附膜板所吸附金粒子數量不多，僅改善部份P3HT分子的聚集結構。若選用適當的添加劑，能有效地增加金粒子在氣/液界面上的吸附量，改善P3HT的聚集現象，成功製備出P3HT/AuNPs薄膜。此外，在適當ODA單分子層濃度的添加下，藉由P3HT與ODA間的分子作用力，有助於P3HT單分子層形成均勻平坦地結構，亦能有效地增加金粒子在氣/液界面上的吸附量，成功製備出P3HT/AuNPs薄膜。

Regioregular poly-(3-hexylthiophene)(rr-P3HT) and mixed P3HT/ octadecylamine(ODA) was used as template monolayers to adsorb the gold nanoparticles (AuNPs) dispersed in subphase. Furthermore, the adsorption of AuNPs was enhanced by the destabilization effect of ethanol and CaCl2 introduced into the colloidal solution. The behaviors of the P3HT/AuNPs mixed films were studied by the pressure-area (π-A) isotherm and by the observations of transmission electron microscopy (TEM) and atomic force microscope (AFM). The experimental results show that P3HT do not form a homogeneous monolayer and tends to aggregate at the air/liquid interface. Meanwhile, the AuNPs adsorbed by the P3HT monolayer are low, attributable to the short interaction distance between AuNPs and P3HT. The introduction of ethanol and CaCl2 into the colloidal solution can increase the adsorbed amount of AuNPs, decrease the aggregation structure of P3HT, and leads to a more homogeneous P3HT/AuNPs monolayer. In addition, the introduction of ODA in the P3HT monolayer can also decrease the aggregation of P3HT molecules and enhance the incorporation of AuNPs into the monolayer.

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