Transfer Printing of Metal Nanoparticles with Controllable Dimensions, Placement, and Reproducible Surface-Enhanced Raman Scattering Effects

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• 作者：Mianqi Xue ; Zhen Zhang ; Nan Zhu ; Fangfang Wang ; XinSheng Zhao ; Tingbing Cao
• 刊名：Langmuir
• 出版年：2009
• 出版时间：April 21, 2009
• 年：2009
• 卷：25
• 期：8
• 页码：4347-4351
• 全文大小：858K
• 年卷期：v.25,no.8(April 21, 2009)
• ISSN：1520-5827

文摘

This paper describes the fabrication of single, multiple strand, and three-dimensional patterning of metal nanoparticles by nanotransfer edge printing (nTEP), a method comprising nanoparticle self-assembly, nanotransfer printing (nTP), and edge lithography. In the process proposed here, 20 nm Au nanoparticles (AuNPs) are deterministically arranged in precise placement by manipulating a topographically patterned poly(dimethylsiloxane) (PDMS) stamp, and Ag nanoparticles are conjugated with AuNP patterns to construct surface-enhanced Raman scattering (SERS)-active substrate to detect trace amounts (10⁻¹³ mol/L) of biological molecules such as thrombin with enhancement up to 10¹⁰. The simple, convenient, and inexpensive procedure has extended nTP and nTEP from using evaporated thin metal film to using self-assembled nanoparticles, and may stretch to other organic and inorganic species to find broad applications in many areas.