Chemically Tailored Dielectric-to-Metal Transition for the Design of Metamaterials from Nanoimprinted Colloidal Nanocrystals

被引：85

作者：

Fafarman, Aaron T. ^{[1
]}

Hong, Sung-Hoon ^{[1
]}

Caglayan, Humeyra ^{[1
]}

Ye, Xingchen ^{[2
]}

Diroll, Benjamin T. ^{[2
]}

Paik, Taejong ^{[2
]}

Engheta, Nader ^{[1
]}

Murray, Christopher B. ^{[2
,3
]}

Kagan, Cherie R. ^{[1
,2
,3
]}

机构：

[1] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA

[2] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA

[3] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

NANO LETTERS | 2013年 / 13卷 / 02期

基金：

美国国家科学基金会;

关键词：

Plasmonics; soft lithography; gold nanoparticles; ammonium thiocyanate; ligand exchange; dielectric function; OPTICAL-PROPERTIES; CHARGE-TRANSPORT; GOLD; NANOPARTICLES; LITHOGRAPHY; QUANTUM; FILMS; NANOSTRUCTURES; SUPERLATTICE; MONOLAYERS;

D O I：

10.1021/nl303161d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate optical metamaterial design using colloidal gold nanocrystal building blocks. In the solid state, chemically exchanging the nanocrystals' surface-capping molecules provides a tailorable dielectric-to-metal transition exhibiting a 1010 range in DC conductivity and dielectric permittivity ranging from everywhere positive to everywhere negative throughout the visible-to-near-IR. Direct, wide-area nanoimprinting of subwavelength superstructures at room temperature, on plastic and glass substrates, affords plasmonic resonances ranging from 660 to 1070 nm, in agreement with numerical simulations.

引用

页码：350 / 357

页数：8

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