Surface plasmon microscope

Fig. 71. Stationary patterns of different wavelength emerging in the camphor, periodate Au system for different compositions of the electrolyte [160], The images were obtained with a surface plasmon microscope.

Passive to active transitions, as imaged with the surface plasmon microscope, are depicted in Figs. 55 and 56 (color plate following page 112). In the first example, the working electrode consisted of an Ag ring having a... 

Kim DS, Hohng SC, Malyarchuk V, Yoon YC, Ahn YH, Yee KJ, Park JW, Kim J, Park QH, Lienau C (2003) Microscopic origin of surface-plasmon radiation in plasmonic band-gap nanostructures. Phys Rev Lett 91 143901... 

This effect is depicted combining the SERS analysis with the microscopic investigation, as done in Fig. 20.12, where SEM images of Ag colloidal particles with adsorbed lH-1,2,3-triazole, deposited as dry layers onto cover glasses [22], are reported together with the SERS spectrum and the SPR (surface plasmon resonance) bands occurring in the UV-vis region. 

Instrumental application of surface-plasmon-enhanced fluorescence was applied in using a TP scanning tunneling microscope [363], This was employed to probe the TP excited fluorescence from organic nanoparticles adsorbed on a silver surface. A size dependence of fluorescence enhancement and photodecomposition was reported as a result of competition between surface-plasmon-enhanced TP fluorescence and nonradiative energy transfer from the excited dye molecules to the silver surface. The schematic experimental setup is shown in Figure 3.14 [363]. 

Figure 3.14. Schematic setup for a TP tunneling microscope for probing surface-plasmon-induced local field enhancement of TP excited fluorescence for organic nanoparticles coated on a silver surface. (From Ref. [363] with permission of the American Chemical Society.)...

Figure 34.1 Extinction (absorption) spectrum of gold nanorods and their transmitted electron microscopic image (inset). Cold nanorods (10 x 60 nm) showed peaks at 520 and 900nm corresponding to the transverse and longitudinal surface plasmon...

An experimental setup of an SP microscope suitable for spatiotemporal measurements in an electrochemical environment is depicted in Fig. 51. The working electrode consists of an Ag or Au film of about 50-nm thickness that is evaporated onto a glass prism having a high refractive index. The glass prism permits the excitation of surface plasmons by... 

In the first part of the chapter several methods used to observe morphology of polymer blends are presented. Various optical microscopic methods are reviewed, including such modem techniques as photon tunneling microscopy (PTM), scanning near-field optical microscopy (SNOM), phase measurement interference microscopy (PMIM), surface plasmon microscopy (SPM) and optical waveguide microscopy (OWM). Many of these methods have been developed to study surfaces and thin films. However, they can also be applied to polymer blend morphology. 

Beyond the enhancement provided by metals exhibiting surface plasmon resonances (i.e. copper, silver and gold in particular) with suitably rough surfaces, other means of enhancement have become available. The use of tip-enhancement is particularly promising. The tip of a scanning tunneUng microscope that is in close... 

Each analytical instrument has a separate property, for example UV-visible spectroscopy helps to identify the surface plasmon resonance of synthesized nanoparticles. X-ray diffractometry identifies the crystaUine nature of synthesized nanoparticles and also using Scherrer s formula (D = K%l(3 cos 0) from which researchers are able to calculate the crystal size of synthesized nanoparticles. Fourier transform infrared spectroscopy finds the functional group which reduces metal salts into nanoparticles. The scanning electron microscope and transmission electron microscope indicate the exact size and shape of nanoparticles. Zeta potential plays a major role in nanoparticle characterization, which results in the stability and withstand property of nanoparticles. 

The properties of nanometric particles strictly depend on their microscopical structure (ie, chemical composition, shape, size, percentage of defects, microstrain concentration, etc). For example, the characteristic surface plasmon absorption of a system of metal nanoparticles dispersed into a dielectric matrix is related to the particle shape and size (34). To prepare a color filter, identical particles should be used, otherwise the material will appear black. The presence of a single type of microscopic structure allows each particle to provide the same contribution to the composite properties. From a theoretical point of view, an ideal nanostructin-ed composite should be made of identical metal domains uniformly dispersed into the polymeric matrix. However, since it is very difficult to prepare a sample of... 

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