Silver island films

Zeisel D, Deckert V, Zenobi R and Vo-Dinh T 1998 Near-field surface-enhanced Raman spectroscopy of dye molecules adsorbed on silver island films Chem. Phys. Lett. 283 381... 

Figure 2.9 Spectra of a single adenine nanocrystal, (a) TERS spectrum, (b) ordinal SERS spectrum, and (c) ordinary near-infrared (NIR) Raman spectra. For the SERS measurement, a silver island film was used. For the NIR Raman measurement, i thick sample of adenine was used with a 1 h exposure.

A number of promising metal structures for fluorescence signal enhancement have been proposed silver island films (SIFs) that provide about 5-15-fold enhancement [89], fractal-like structures that resulted in stronger enhancements at specific hot spots [90-92], and SIFs deposited on silver or gold films with about 50-fold enhancement [93, 94], Recently, it was found that strong enhancement on a gold film based plasmonic platform may change even the shape of the emission spectrum [95],... 

Lakowicz JR, Shen Y, D Auria S, Malicka J, Fang J, Gryczynski Z, Gryczynski I (2002) Radiative decay engineering 2. Effects of silver island films on fluorescence intensity, lifetimes, and resonance energy transfer. Anal Biochem 301 261-277... 

TERS experiments were performed to study the bacterial cell surface. Biju et al. combined silver island films on glass coverslips with an AFM to investigate the effect of electron-acceptor limitation on the outer cell membrane of Shewanella one.ide.nsis [103]. 

Other SERS-active substrate techniques include mechanical polishing polycristalline silver (Vo-Dinh et al., 1988) or ion bombardment in vacuo (Wood and Zwemer, 1981 Davies et al., 1986). A chemical procedure to prepare silver island films using Tollen s reagent was developed by Ni and Cotton (1986) which turned out to be simple, rapid and highly reproducible. In addition, the surface roughness and hence the enhancement... 

Figure 1.3. (A) Photographs of silver island films (SIFs) deposited onto glass and plastic supports. (B) Normalized absorbance of zinc, copper, gold and silver nanostructured particles on a glass support. Atomic force microscope images of SIFs on (C) glass (D) plastic support.

K. Aslan, Z. Leonenko, J. R. Lakowicz, and C. D. Geddes. Annealed silver-island films for applications in metal-enhanced fluorescence Interpretation in terms of radiating plasmons yourna/ of fluorescence, 2005, 15, 643-654. 

K. Aslan, S. N. Malyn, and C. D. Geddes. Angular-Dependent Metal-Enhanced Fluorescence from Silver Island Films Chemical physics letters, 2008,453, 222-228. 

Silver island film using SiOx spacer layers Basic ftichsin 200 14]... 

Silver island film with 15 nm fatty acid spacer layer Phthalocyanine 400 15]... 

Silver island film peridinin-chlorophyll-pro tein 18 51]... 

Silver Island film fluorescein-labeled immunoglobulin G (Fl-IgG) 40 49]... 

The PTCDA moiety is a class of molecule that readily exhibits excimer fluorescence. A direct method to attain the enhancement factor for a substrate is to deposit a LB monolayer onto a glass slide that contains an area of a silver island film. By comparing the fluorescence intensity measured on glass and the island film under identical conditions, an excellent assessment of the EF can be attained. 

Figure 3.8 Molecular absorption of a PTCD derivative, surface plasmon of the evaporated silver film. Excimer fluorescence of an LB monolayer on glass and SERRS with the background SEF of the LB monolayer on the silver island film.

Aroca, R., Kovacs, G. J., Jennings, C. A., Loutfy, R. O., and Vincett, P. S. (1988). Fluorescence enhancement from Langmuir-Blodgett monolayers on silver island films. Langmuir 4 518-521. 

Ray, K., Badugu, R., and Lakowicz, J. R. (2007). Sulforhodamine Adsorbed Langmuir-Blodgett Layers on Silver Island Films Effect of Probe Distance on the Metal-Enhanced Fluorescence. Journal of Physical Chemistry C 111 7091-7097. 

Goulet, P. J. G., Pieczonka, N. P. W., and Aroca, R. F. (2005). Mapping single-molecule SERRS from Langmuir-Blodgett monolayers on nanostructured silver island films. Journal of Raman Spectroscopy 36 574-580. 

Aroca, R. F., Constantino, C. J. L., and Duff, J. (2000). Surface-enhanced Raman scattering and imaging of Langmuir-Blodgett monolayers of bis(phenethylimido)perylene on silver island films. Applied Spectroscopy 54 1120-1125. 

DeSaja-Gonzalez, J., Aroca, R., Nagao, Y., and DeSaja, J. A. (1997). Surface-enhanced fluorescence and SERRS spectra of N-octadecyl-3,4 9,10-perylenetetraca boxylic monoanhydride on silver island films. Spectrochimica Acta, Part A Molecular and Biomolecular Spectroscopy 53A 173-181. 

Aslan, K., Malyn, S. N. and Geddes, C. D. (2008). Angular-dependent metal-enhanced fluorescence from silver island films. Chem. Phys. Lett. 453 222-228. 

Kununerlen, J., Leitner, A., Brunner, H., Aussenegg, F. R. and Wokaun, A. (1993). Enhanced Dye Fluorescence over Silver Island Films - Analysis of the Distance Dependence. Mol. Phys. 80 1031-1046. 

Figure 5.3 Atomic Force Microscopy (AFM) images of two Silver Island Film (SIF) coated glass slides (A B), showing the variation in size and density that can be obtained by altering the dip coating conditions. Slides were produced by LI-COR Biosciences and imaged at the University of Nebraska-Lincoln.

Figure 5.4 Light microscope images of glass slides coated with silver island films, colloids, concentrated colloids, and CCA nanostructures. The CCA nanostructures form discrete aggregate structures that are not observed in the other preparations.

Table 5.1 Average fold-enhancements observed for either Alexa Fluor 680 or IRDye 800CW spotted on sliver nanostructure coated glass relative to imcoated glass slides. Average enhancements are shown for colloid, silver island film, and CCA nanostructure coated surfaces. The CCA nanostructiu es provide the greatest enhancements.

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