Journal
ADVANCED MATERIALS
Volume 24, Issue 36, Pages 4811-4841Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201201690
Keywords
gold nanorods; synthesis; self-assembly; sensing; functionalization
Categories
Funding
- National Science Foundation [DMR-0547399, DMR-1105878]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1105878] Funding Source: National Science Foundation
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Gold nanorods have received much attention due to their unique optical and electronic properties which are dependent on their shape, size, and aspect ratio. This article covers in detail the synthesis, functionalization, self-assembly, and sensing applications of gold nanorods. The synthesis of three major types of rods is discussed: single-crystalline and pentahedrally-twinned rods, which are synthesized by wet chemistry methods, and polycrystalline rods, which are synthesized by templated deposition. Functionalization of these rods is usually necessary for their applications, but can often be problematic due to their surfactant coating. Thus, general strategies are provided for the covalent and noncovalent functionalization of gold nanorods. The review will then examine the significant progress that has been made in controllable assembly of nanorods into various arrangements. This assembly can have a large effect on measurable properties of rods, making it particularly applicable towards sensing of a variety of analytes. Other types of sensing not dependent on nanorod assembly, such as refractive-index based sensing, are also discussed.
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