Micelle-directed chiral seeded growth on anisotropic gold nanocrystals

doi:10.1126/science.aba0980

GSTDTAP > 气候变化

DOI	10.1126/science.aba0980
	Micelle-directed chiral seeded growth on anisotropic gold nanocrystals
	Guillermo González-Rubio; Jesús Mosquera; Vished Kumar; Adrián Pedrazo-Tardajos; Pablo Llombart; Diego M. Solís; Ivan Lobato; Eva G. Noya; Andrés Guerrero-Martínez; José M. Taboada; Fernando Obelleiro; Luis G. MacDowell; Sara Bals; Luis M. Liz-Marzán
	2020-06-26
发表期刊	Science
出版年	2020
英文摘要	Although plasmonic optical activity can arise from chiral assemblies of gold and silver nanoparticles, there are few examples of gold nanoparticles with intrinsic chirality and high optical activity. González-Rubio et al. show that morphological chirality can be induced during the seeded growth of gold nanoparticles, particularly for highly anisotropic nanorods. Chiral additives as cosurfactants formed helical micelles that directed the seeded growth to create grooves that maintained a chiral morphology. The resulting particles displayed high-intensity circular dichroism with anisotropy factors near 0.2 at near-infrared wavelengths. Science , this issue p. [1472][1] Surfactant-assisted seeded growth of metal nanoparticles (NPs) can be engineered to produce anisotropic gold nanocrystals with high chiroptical activity through the templating effect of chiral micelles formed in the presence of dissymmetric cosurfactants. Mixed micelles adsorb on gold nanorods, forming quasihelical patterns that direct seeded growth into NPs with pronounced morphological and optical handedness. Sharp chiral wrinkles lead to chiral plasmon modes with high dissymmetry factors (~0.20). Through variation of the dimensions of chiral wrinkles, the chiroptical properties can be tuned within the visible and near-infrared electromagnetic spectrum. The micelle-directed mechanism allows extension to other systems, such as the seeded growth of chiral platinum shells on gold nanorods. This approach provides a reproducible, simple, and scalable method toward the fabrication of NPs with high chiral optical activity. [1]: /lookup/doi/10.1126/science.aba0980
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/278215
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Guillermo González-Rubio,Jesús Mosquera,Vished Kumar,et al. Micelle-directed chiral seeded growth on anisotropic gold nanocrystals[J]. Science,2020.
APA	Guillermo González-Rubio.,Jesús Mosquera.,Vished Kumar.,Adrián Pedrazo-Tardajos.,Pablo Llombart.,...&Luis M. Liz-Marzán.(2020).Micelle-directed chiral seeded growth on anisotropic gold nanocrystals.Science.
MLA	Guillermo González-Rubio,et al."Micelle-directed chiral seeded growth on anisotropic gold nanocrystals".Science (2020).