Directed Self-Assembly of Densely Packed Gold Nanoparticles

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• 作者：Mohamed Asbahi ; Kevin T. P. Lim ; Fuke Wang ; Huigao Duan ; Naganivetha Thiyagarajah ; Vivian Ng ; Joel K. W. Yang
• 刊名：Langmuir
• 出版年：2012
• 出版时间：December 11, 2012
• 年：2012
• 卷：28
• 期：49
• 页码：16782-16787
• 全文大小：365K
• 年卷期：v.28,no.49(December 11, 2012)
• ISSN：1520-5827

文摘

Directing the self-assembly of sub-10-nm nanoparticles has been challenging because of the simultaneous requirements to achieve a densely packed monolayer and rearrange nanoparticles to assemble within a template. We met both requirements by separating the processes into two steps by first forming a monolayer of gold nanoparticles on a suitable liquid subphase of anisole and then transferring it edgewise onto a silicon substrate with a prepatterned template comprising nanoposts and nanogratings. Doing so resulted in nanoparticles that assembled in commensuration with the template design while exhibiting appreciable template-induced strain. These dense arrays of nanostructures could either be directly applied or used as lithographic masks in applications for light collection, chemical sensing, and data storage.