Journal ArticleDOI
Shape- and size-dependent refractive index sensitivity of gold nanoparticles.
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TLDR
Gold nanoparticles of different shapes and sizes were dispersed into water-glycerol mixtures of varying volume ratios to investigate the response of their surface plasmon peaks to the refractive index of the surrounding medium.Abstract:
Gold nanoparticles of different shapes and sizes, including nanospheres, nanocubes, nanobranches, nanorods, and nanobipyramids, were dispersed into water-glycerol mixtures of varying volume ratios to investigate the response of their surface plasmon peaks to the refractive index of the surrounding medium. The refractive index sensitivities and figures of merit were found to be dependent on both the shape and the size of the Au nanoparticles. The index sensitivities generally increase as Au nanoparticles become elongated and their apexes become sharper. Au nanospheres exhibit the smallest refractive index sensitivity of 44 nm/RIU and Au nanobranches exhibit the largest index sensitivity of 703 nm/RIU. Au nanobipyramids possess the largest figures of merit, which increase from 1.7 to 4.5 as the aspect ratio is increased from 1.5 to 4.7.read more
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References
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Journal ArticleDOI
Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology.
TL;DR: A review of gold nanoparticles can be found in this article, where the most stable metal nanoparticles, called gold colloids (AuNPs), have been used for catalysis and biology applications.
Journal ArticleDOI
Localized Surface Plasmon Resonance Spectroscopy and Sensing
TL;DR: This review describes recent fundamental spectroscopic studies that reveal key relationships governing the LSPR spectral location and its sensitivity to the local environment, including nanoparticle shape and size and introduces a new form of L SPR spectroscopy, involving the coupling between nanoparticle plasmon resonances and adsorbate molecular resonances.
Journal ArticleDOI
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TL;DR: Progress continues in the development of smaller, more penetrable probes for biological imaging, and the number of probes in this line of research has increased.
Journal ArticleDOI
Anisotropic metal nanoparticles: Synthesis, assembly, and optical applications
Catherine J. Murphy,Tapan K. Sau,Anand Gole,Christopher J. Orendorff,Jinxin Gao,Linfeng Gou,Simona E. Hunyadi,Tan Li +7 more
TL;DR: Variations in reaction conditions and crystallographic analysis of gold nanorod have led to insight into the growth mechanism of these materials, and optical applications in sensing and imaging, which take advantage of the visible light absorption and scattering properties of the nanorods are discussed.
Journal ArticleDOI
Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications
Eugenii Katz,Itamar Willner +1 more
TL;DR: This review describes recent advances in the synthesis of biomolecule-nanoparticle/nanorod hybrid systems and the application of such assemblies in the generation of 2D and 3D ordered structures in solutions and on surfaces.