Preparation of Anisotropic and Oriented Particles on a Flexible Substrate

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• 作者：Mahshid Chekini ; Ugo Cataldi ; Plinio Maroni ; Laure Gu茅n茅e ; Radovan 膶ern媒 ; Thomas B眉rgi
• 刊名：Langmuir
• 出版年：2015
• 出版时间：December 8, 2015
• 年：2015
• 卷：31
• 期：48
• 页码：13221-13229
• 全文大小：651K
• ISSN：1520-5827

文摘

Elongated plasmonic nanoparticles show superior optical properties when compared to spherical ones. Facile, versatile and cost-effective bottom-up approaches for fabrication of anisotropic nanoparticles in solution have been developed. However, fabrication of 2-D plasmonic templates from elongated nanoparticles with spatial arrangement at the surface is still a challenge. We used controlled seed-mediated growth in the presence of porous and functionalized surface of flexible polydimethylsiloxane (PDMS) templates to provide directional growth and formation of elongated gold nanoparticles (AuNPs). Atomic force microscopy (AFM) and spectroscopy revealed embedding of the particles within the functionalized porous surface of PDMS. Nanoparticles shapes were observed with transmission electron microscope (TEM), UV鈥揤is spectroscopy, and X-ray powder diffraction (XRPD) measurements, which revealed an overall orientation of particles at the surface. Anisotropic and oriented particles on a flexible substrate are of interest for sensing applications.