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Phys Chem Chem Phys. 2013 Oct 7;15(37):15499-507. doi: 10.1039/c3cp52816b.

Sacrificial polymer thin-film template with tunability to construct high-density Au nanoparticle arrays and their refractive index sensing.

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  • 1Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715, China.


Great challenges still remain to assemble metal nanoparticles on a substrate with tunability, high density, robust stability, good dispersion and well-retained properties for various applications. Herein a new concept using a polymer thin-film as a sacrificial template is investigated to fabricate highly dense and well-dispersed nanoparticle arrays. In contrast to a conventional "hard" template, the polymer template is a porous multilayered film allowing in situ growth of Au nanoparticles with a restricted ripening mode, and tuning the nanoparticle size and density of the arrays is possible by simply adjusting the loading conditions. The prepared substrate-attached nanoparticle arrays demonstrate good thermal and chemical stability, while offering highly sensitive and tunable localized surface plasmon resonance (LSPR) refractive index sensing with a broad linear dynamic range. This method could be extended to controllably fabricate other robust and "clean" nanoparticle arrays on various substrates for various applications including sensing, catalysis and optoelectronics.

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