Fabrication of P3HT/gold nanoparticle LB films by P3HT templating Langmuir monolayer

doi:10.1016/j.apsusc.2014.09.157

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標題:	Fabrication of P3HT/gold nanoparticle LB films by P3HT templating Langmuir monolayer
作者:	Chen, Liang-Huei Hsu, Wen-Ping Chan, Han-Wen Lee, Yuh-Lang
貢獻者:	醫藥化學系
關鍵字:	P3HT Gold nanoparticles Monolayer
日期:	2014-11
上傳時間:	2015-05-06 21:21:18 (UTC+8)
出版者:	Elsevier Science Bv
摘要:	Regioregular poly(3-hexyl thiophene) (rr-P3HT) and mixed P3HT/octadecyl amine (ODA) were used as template monolayers to adsorb the gold nanoparticles (AuNPs) dispersed in subphase. The behaviors of P3HT and P3HT/ODA monolayers were investigated by surface pressure area per molecule (7-A) isotherms, transmission electron microscopy (TEM) and atomic force microscopy (AFM). The experimental results show that P3HT does not form a homogeneous film and tends to aggregate at the air/water interface. Meanwhile, the amount of AuNPs adsorbed by the P3HT monolayers is low, attributable to the weak interaction between AuNPs and P3HT. By introduction of ODA molecules into the P3HT monolayer, the spreading of P3HT molecules at the air/water interface is improved and the aggregation of P3HT is significantly inhibited. A nearly uniform and homogeneously mixed P3HT/ODA monolayer can be obtained when 50% of ODA is introduced. It is also found that the introduction of ODA can significantly increase the adsorption of AuNPs. For the mixed monolayer with low ratio of ODA (P3HT/ODA= 110.2), a higher concentration of adsorbed AuNPs was observed on the corresponding monolayer. However, when the ODA/P3HT ratio increases to 111, the AuNPs tend to form three-dimensional (3D) aggregates and the AuNPs cannot distribute well as a homogeneous monolayer. This result is ascribed to the increasing hydrophobicity of the adsorbed AuNPs because of capping of more ODA molecules. (C) 2014 Elsevier B.V. All rights reserved.
關聯:	Applied Surface Science, v.320, pp.736-741
显示于类别:	[食藥產業暨檢測科技系(含五專)] 期刊論文

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