Light-Controlled Shrinkage of Large-Area Gold Nanoparticle Monolayer Film for Tunable SERS Activity

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	Light-Controlled Shrinkage of Large-Area Gold Nanoparticle Monolayer Film for Tunable SERS Activity
	Lu, Xuefei; Huang, Youju; Liu, Baoqing; Zhang, Lei; Song, Liping; Zhang, Jiawei; Zhang, Afang; Chen, Tao
刊名	CHEMISTRY OF MATERIALS
	2018
卷号	30 期号:6 页码:1989-1997
关键词	Enhanced Raman-scattering Plasmonic Nanoparticle Facile Fabrication Interface Nanospheres Nanogap
英文摘要	The two-dimensional (2D) monolayer gold nanoparticle (Au NP) film is of significant interest and importance in both fundamental and practical applications including optoelectronic devices, sensing, catalysis, and surface-enhanced Raman spectroscopy (SERS). Because of the weak physical interaction, the conventional monolayer Au NP film fabricated at the oil-water interface was unstable, easily breakable, and difficultly transferred. In the present work, we report on a simple and effective chemical cross-linking strategy at the air-water interface to achieve a large-scale monolayer gold nanoparticle film with intelligently tunable size of nanogaps, and excellent free-standing and easily transferable properties. In our strategy, acrylamide, a polymerizable molecule, was first modified on the surface of Au NPs for subsequent self-assembly into a monolayer film at the liquid-liquid interface. Through photopolymerization of acrylamide, a chemically cross-linked film was formed with closely packed nanoparticles, highly macroscopic uniformity, and excellent free-standing property, which allowed it to be easily transferred from the air water interface onto various solid substrates while maintaining its integrity. It is interesting to find that the macroscopic film underwent an in situ shrinkage under irradiation of UV-light, and its area shrinkage ratio is close to 55% (equal to 2.2 times) of that from non-cross-linked counterparts. More importantly, UV-light-controlled in situ shrinkage of the Au NP film would lead to intelligently, precisely tuned nanogaps less than 0.5 nm between neighboring Au NPs for maximal amplification of SERS signals, and the macroscopic uniformity of the films ensured the reproducible performance of SERS signals, providing an ideal candidate for SERS applications.
学科主题	Chemistry ; Materials Science
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16746]
专题	2018专题
推荐引用方式 GB/T 7714	Lu, Xuefei,Huang, Youju,Liu, Baoqing,et al. Light-Controlled Shrinkage of Large-Area Gold Nanoparticle Monolayer Film for Tunable SERS Activity[J]. CHEMISTRY OF MATERIALS,2018,30(6):1989-1997.
APA	Lu, Xuefei.,Huang, Youju.,Liu, Baoqing.,Zhang, Lei.,Song, Liping.,...&Chen, Tao.(2018).Light-Controlled Shrinkage of Large-Area Gold Nanoparticle Monolayer Film for Tunable SERS Activity.CHEMISTRY OF MATERIALS,30(6),1989-1997.
MLA	Lu, Xuefei,et al."Light-Controlled Shrinkage of Large-Area Gold Nanoparticle Monolayer Film for Tunable SERS Activity".CHEMISTRY OF MATERIALS 30.6(2018):1989-1997.