Uniform and reproducible plasmon-enhanced fluorescence substrate based on PMMA-coated, large-area Au@Ag nanorod arrays  

作　　者：Jun Sun  Ziyang Li  Yinghui Sun  Liubiao Zhong  Jing Huang  Junchang Zhang  Zhiqiang Liang  Jianmei Chen  Lin Jiang 

机构地区：[1]Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou China [2]Soochow Institute for Energy and Materials InnovationS, College of Physics, Optoelectronics and Energy, Institute of Chemical Power Sources & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou China [3]Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies Soochow University Suzhou China

出　　处：《Nano Research》2018年第2期953-965,共13页纳米研究（英文版）

摘　　要：Here we describe a plasmon-enhanced fluorescence substrate based on poly（methyl methacrylate） （PMMA）-coated, large-area Au@Ag nanorod arrays. The use of a PMMA medium enables precise control of the competition between enhancing and quenching processes as a function of the distance between Au@Ag nanorods and dye molecules. At the optimal PMMA layer thickness of 56 nm （for which the distance between nanopartides and dye molecules is 16 nm）, a maximum enhancement of fluorescence of up to N 27 times is measured. The competition mechanism between enhancing and quenching processes depends on the thickness of the PMMA layer, which has been confirmed by consistent experimental and theoretical modeling results. Notab136 the micropatterned metal-enhanced fluorescence （MEF） substrate exhibits high uniformity and reproducibility. The simple spin-coating process described herein provides an attractive, scalable, and low-cost strategy to produce uniform and reproducible large-area MEF substrates that can potentially be used in many fields, such as biochips, diagnostics, and photonics.Here we describe a plasmon-enhanced fluorescence substrate based on poly（methyl methacrylate） （PMMA）-coated, large-area Au@Ag nanorod arrays. The use of a PMMA medium enables precise control of the competition between enhancing and quenching processes as a function of the distance between Au@Ag nanorods and dye molecules. At the optimal PMMA layer thickness of 56 nm （for which the distance between nanopartides and dye molecules is 16 nm）, a maximum enhancement of fluorescence of up to N 27 times is measured. The competition mechanism between enhancing and quenching processes depends on the thickness of the PMMA layer, which has been confirmed by consistent experimental and theoretical modeling results. Notab136 the micropatterned metal-enhanced fluorescence （MEF） substrate exhibits high uniformity and reproducibility. The simple spin-coating process described herein provides an attractive, scalable, and low-cost strategy to produce uniform and reproducible large-area MEF substrates that can potentially be used in many fields, such as biochips, diagnostics, and photonics.

关 键 词：Au@Ag nanorod arrays metal-enhancedfluorescence （MEF） poly（methyl methacrylate）（PMMA） layer micro patterning localized surface plasmonresonance （LSPR） 

分 类 号：O632.52[理学—高分子化学] U491.5[理学—化学]