Characterization of electrodeposited gold and palladium nanowire gratings with optical diffraction measurements

16Citations
Citations of this article
24Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Parallel arrays of either Au or Pd nanowires were fabricated on glass substrates via the electrochemical process of lithographically patterned nanowire electrodeposition (LPNE) and then characterized with scanning electron microscopy (SEM) and a series of optical diffraction measurements at 633 nm. Nanowires with widths varying from 25 to 150 nm were electrodeposited onto nanoscale Ni surfaces created by the undercut etching of a photo-resist pattern on a planar substrate. With the use of a simple transmission grating geometry, up to 60 diffraction orders were observed from the nanowire gratings, with separate oscillatory intensity patterns appearing in the even and odd diffraction orders. The presence of these intensity oscillations is attributed to the LPNE array fabrication process, which creates arrays with alternating interwire spacings of distances d+Δ and d-Δ, where d = 25μm and the asymmetry Δ varied from 0 to 3.5 μm. The amount of asymmetry could be controlled by varying the LPNE undercut etching time during the creation of the nanoscale Ni surfaces. The Fourier transform of a mathematical model of the nanowire array was used to predict the diffraction intensity patterns and quantitatively determine Δ for any grating. Additional sensitivity and an expanded diffraction order range were obtained through the use of external reflection (ER) and total internal reflection (TIR) diffraction geometries. © 2009 American Chemical Society.

Cite

CITATION STYLE

APA

Halpern, A. R., Nishi, N., Wen, J., Yang, F., Xiang, C., Penner, R. M., & Corn, R. M. (2009). Characterization of electrodeposited gold and palladium nanowire gratings with optical diffraction measurements. Analytical Chemistry, 81(14), 5585–5592. https://doi.org/10.1021/ac900938t

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free