Effect of clustering on the surface plasmon band in thin films of metallic nanoparticles

2014 ◽  
Vol 9 (1) ◽  
pp. 093796 ◽  
Author(s):  
Rui M. S. Pereira ◽  
Joel Borges ◽  
Filipa C. R. Peres ◽  
Paulo A. S. Pereira ◽  
Georgi V. Smirnov ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Plasmon ◽  
Metallic Nanoparticles ◽  
Surface Plasmon Band ◽  
Plasmon Band

scholarly journals Glucosamine Phosphate Induces AuNPs Aggregation and Fusion into Easily Functionalizable Nanowires

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 622 ◽  
Author(s):  
Álvaro Martínez ◽  
Yanchao Lyu ◽  
Fabrizio Mancin ◽  
Paolo Scrimin
Keyword(s):  
Aqueous Solution ◽  
Optical Properties ◽  
Surface Plasmon ◽  
Near Infrared ◽  
Au Nanoparticles ◽  
Surface Plasmon Band ◽  
Acid Phosphate ◽  
Plasmon Band ◽  
Dimensional Distribution ◽  
Au Nanowires

The challenge to obtain plasmonic nanosystems absorbing light in the near infrared is always open because of the interest that such systems pose in applications such as nanotherapy or nanodiagnostics. Here we describe the synthesis in an aqueous solution devoid of any surfactant of Au-nanowires of controlled length and reasonably narrow dimensional distribution starting from Au-nanoparticles by taking advantage of the properties of glucosamine phosphate under aerobic conditions and substoichiometric nanoparticle passivation. Oxygen is required to enable the process where glucosamine phosphate is oxidized to glucosaminic acid phosphate and H2O2 is produced. The process leading to the nanosystems comprises nanoparticles growth, their aggregation into necklace-like aggregates, and final fusion into nanowires. The fusion requires the consumption of H2O2. The nanowires can be passivated with an organic thiol, lyophilized, and resuspended in water without losing their dimensional and optical properties. The position of the broad surface plasmon band of the nanowires can be tuned from 630 to >1350 nm.

Low Electric Field Intensity and Thermotropic Tuning Surface Plasmon Band Shift of Gold Island Film by Liquid Crystals

2012 ◽  
Vol 116 (4) ◽  
pp. 2720-2727 ◽  
Author(s):  
Jing Xie ◽  
Xuemin Zhang ◽  
Zenghui Peng ◽  
Zhanhua Wang ◽  
Tieqiang Wang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Surface Plasmon ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Island Film ◽  
Surface Plasmon Band ◽  
Band Shift ◽  
Plasmon Band
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