Optical Properties of Self-Organized Gold Nanorod鈥揚olymer Hybrid Films

详细信息    查看全文

• 作者：Ulrich Tritschler ; Igor Zlotnikov ; Philipp Keckeis ; Helmut Schlaad ; Helmut C枚lfen
• 刊名：Langmuir
• 出版年：2014
• 出版时间：November 25, 2014
• 年：2014
• 卷：30
• 期：46
• 页码：13781-13790
• 全文大小：613K
• ISSN：1520-5827

文摘

High fractions of gold nanorods were locally aligned by means of a polymeric liquid crystalline phase. The gold nanorods constituting >80 wt % of the thin organic鈥搃norganic composite films form a network with side-by-side and end-to-end combinations. Organization into these network structures was induced by shearing gold nanorod鈥揕C polymer dispersions via spin-coating. The LC polymer is a polyoxazoline functionalized with pendent cholesteryl and carboxyl side groups enabling the polymer to bind to the CTAB stabilizer layer of the gold nanorods via electrostatic interactions, thus forming the glue between organic and inorganic components, and to form a chiral nematic lyotropic phase. The self-assembled locally oriented gold nanorod structuring enables control over collective optical properties due to plasmon resonance coupling, reminiscent of enhanced optical properties of natural biomaterials.