Sensors based on monochromatic interrogation of a localised surface plasmonresonance
MetadataShow full item record
The localised surface plasmon resonance in gold nanoparticles can be used as the basis of a refractometric sensor. Usually, this is accomplished by monitoring a shift in wavelength of the resonance peak, a task which requires measurements over a range of wavelengths. Here we investigate a different scheme, in which interrogation of the sensor is carried out at a single wavelength. We have used numerical simulations to estimate the effect that the shape of gold nanoparticles would have on the performance on such sensors. A variety of geometries of gold nanoparticles were investigated, including nano-spheres, nano-rods, nano-triangles, and nano-bowties. The performance of a sensor that operates at a single wavelength is controlled by dT/dn, the change in transmittance T with refractive index n, determined at the interrogation wavelength. In turn, dT/dn depends upon the extinction cross-section of the nanoparticles at the chosen wavelength, and on the density of the nanoparticles in the light path. Contributions to the sensor efficiency also include the shift in wavelength of the plasmon resonance and, importantly, the peak sharpness. Of the particles examined, gold nano-rods will provide the most sensitive sensors by a large margin.
Showing items related by title, author, creator and subject.
Enhanced accumulation of microalgal pigments using metal nanoparticle solutions as light filtering devicesEroglu, Ela; Eggers, P.; Winslade, M.; Smith, S.; Raston, C. (2013)Localized surface plasmon resonances of various metal nanoparticles are used as wavelength specific backscattering light filters. Placing spheroidal silver nanoparticles and gold nanorods around microalgal culture flasks ...
Nonenzymatic glucose sensor based on renewable electrospun Ni nanoparticle-loaded carbon nanofiber paste electrodeLiu, Yang; Teng, H.; Hou, H.; You, T. (2009)A novel non enzymatic glucose sensor was developed based on the renewable Ni nanoparticle-loaded carbon nanofiber paste (NiCFP) electrode. The NiCF nano composite was prepared by combination of electro spinning technique ...
Asyraf, M.; Anwar, M.; Sheng, L.; Danquah, Michael (2017)© 2017, The Minerals, Metals & Materials Society. Conductive polymers (CPs) have received significant research attention in material engineering for applications in microelectronics, micro-scale sensors, electromagnetic ...