Journal
APPLIED SPECTROSCOPY
Volume 62, Issue 7, Pages 733-738Publisher
SAGE PUBLICATIONS INC
DOI: 10.1366/000370208784909553
Keywords
fluorescence; surface plasmon resonance; SPR : metallic nanoparticles; electron beam lithography; EBL; fluorescence spectroscopy; plasmonics; nano-optics
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Funding
- NCRR NIH HHS [1R43 RR021785-01, R43 RR021785] Funding Source: Medline
- NHGRI NIH HHS [R01 HG002655-05, R01 HG002655-03, R01 HG002655, R01 HG002655-04A1, HG-002655] Funding Source: Medline
- NIBIB NIH HHS [EB-006521, R01 EB006521-02, R01 EB006521, R01 EB006521-01A1, EB-00682, R01 EB000682] Funding Source: Medline
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We report on the nanofabrication of patterned silver particle arrays using electron-beam lithography and the evaluation of their optical properties using backscattering and fluorescence spectroscopy. The silver particles varied in size from 100 to 250 nm and were in the shape of circles, squares, and triangles. Three inter-particle separations, 40, 65, and 90 nm as measured from the side of one particle to the side of the next particle, were used. We observed distinctive patterns of backscattering and fluorescence intensity depending on the particle size, inter-particle spacing, and excitation/emission wavelength used. Our approach allows for a study of the correlation between the backscattering intensities and fluorescence enhancement of silver particle arrays, which can be used to optimize the arrays for multi-fluorophore configuration for advanced sensing designs.
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