Localized surface plasmon resonance nanoparticles

Jensen T.R., Malinsky M.D., Haynes C.L., Van Duyne R.P., Nanosphere lithography Tunable localized surface plasmon resonance spectra of silver nanoparticles, J. Phys. Chem. B, 2000 104 10549-10556. 

Long period gratings modified by the deposition of a self-assembled colloid monolayer of gold have been shown to enhance SRI sensitivity, which was attributed to the localized surface plasmon resonance (LSPR) of gold nanoparticles61. The system was used after functionalization of the gold nanoparticles with dini-trophenyl (DNP) antigen, for the detection of anti-(DNP) with a limit of detection as low as 9.5 x 10 10 M. 

The overall goal of my thesis work is to elucidate the sensing mechanism of the localized surface plasmon resonance (LSPR) of triangular Ag nanoparticle biosensors and to apply that knowledge to optimize their use as a novel analytical tool. 

Van Duyne RP, Haes AJ, Zou S, Schatz GC (2004) A Nanoscale Optical Biosensor The Long Range Distance Dependence of the Localized Surface Plasmon Resonance of Noble Metal Nanoparticles. J Phys Chem B 108 109-116... 

Haes AJ, van Duyne RP. A nanoscale optical biosensor Sensitivity and selectivity of an approach based on the localized surface plasmon resonance spectroscopy of triangular silver nanoparticles. J Am Chem Soc 2002 124 10596-604. 

Keywords Nanostructures Surface plasmon resonance Localized surface plasmon resonance Bio-molecular interactions Refractive index change Effective medium Thin films Biosensors Sensitivity Nanoparticles... 

Malinsky MD, Kelly KL, Schatz GC et al (2001) Chain length dependence and sensing capabilities of the localized surface plasmon resonance of silver nanoparticles chemically modified with alkanethiol self-assembled monolayers. J Am Chem Soc 123 1471-1482... 

A parallel development in sensor technology is the use of gold nanoparticles (AuNPs) and their localized surface plasmon resonances (LSPR) [41] for sensing purposes. Mirkin et al. [42] showed how single nanoparticles (NPs) in solution can... 

Wang TJ, Lin CS (2006) Electro-optically modulated localized surface plasmon resonance biosensors with gold nanoparticles. Appl Phys Lett 89 173903... 

Localized surface plasmon resonance (LSPR) at the metal surface has been exploited to enhance the signal obtained from optical biochips and thereby lower the limits of detection. There are two main enhancement factors (i) an increase in the excitation of the fluorophore by localizing the optical field on the nanoparticles near the fluorophore and (ii) an increase in quantum efficiency of the fluorophore. The plasmon resonance wavelength should coincide with the fluorophore absorption band to obtain the maximum emission efficiency. Several parameters concerning the signal detection enhancement are as follows (84)... 

Haes, A.J. Zou, S. Schatz, G..C. Van Duyne, R.P. (2004) Nanoscale optical biosensor Short range distance dependence of the localized surface plasmon resonance of noble metal nanoparticles. Journal of Physical Chemistry B 108 6961-6968. 

Metal nanoparticles have attracted considerable interest due to their properties and applications related to size effects, which can be appropriately studied in the framework of nanophotonics [1]. Metal nanoparticles such as silver, gold and copper can scatter light elastically with remarkable efficiency because of a collective resonance of the conduction electrons in the metal (i.e., the Dipole Plasmon Resonance or Localized Surface Plasmon Resonance). Plasmonics is quickly becoming a dominant science-based technology for the twenty-first century, with enormous potential in the fields of optical computing, novel optical devices, and more recently, biological and medical research [2]. In particular, silver nanoparticles have attracted particular interest due to their applications in fluorescence enhancement [3-5]. 

Malinsky MD, Kelly KL, Schatz GC, Van Duyne RP (2001) Nanosphere lithography effect of substrate on the localized surface plasmon resonance spectrum of silver nanoparticles. J Phys Oiem B 105 2343... 

Strong enhancement of light absorption over the spectral range of the copper localized surface plasmon resonance has been observed at two-layer planar systems of copper and silver nanopaiticles made with the use of successive vacuum evaporation. The result obtained is treated with taking into account strong near-fieid coupling at a close-packed array of silver and copper nanoparticles. 

T. R. Jensen M. D. Malinsky C. L. Haynes R. P. Van Duyne, Nanosphere Lithography Tunable Localized Surface Plasmon Resonance Spectra of Silver Nanoparticles. J. Phys. Chem. B 2000, 104, 10549-10556. 

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