Title

Biomimic Light Trapping Silicon Nanowire Arrays for Laser Desorption/Ionization of Peptides

Authors

Authors

C. M. Wang; J. M. Reed; L. Y. Ma; Y. Qiao; Y. Luo; S. L. Zou; J. J. Hickman;M. Su

Comments

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Abbreviated Journal Title

J. Phys. Chem. C

Keywords

MALDI MASS-SPECTROMETRY; POROUS SILICON; CARBON NANOTUBES; MATRIX; IDENTIFICATION; SURFACES; PLATFORM; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

Abstract

This article describes a low cost method of generating silicon nanowire arrays that have similar structure and light trapping ability as moth-eye for matrix-free laser desorption/ionization mass spectrometry analysis of small molecules without matrix peak interference. The nanowire array is produced by combining low cost nanosphere lithography and metal nanoparticle-assisted chemical etching of silicon. Owing to their excellent light trapping ability over broad spectral range, silicon nanowire arrays can absorb incoming laser light efficiently, and convert laser energy to heat, which allows efficient desorption/ionization of intact peptide/proteins without matrix. Compared to existing matrix-free substrate such as porous silicon substrates, the biomimic silicon nanowire arrays are better in terms of lower laser energy, structural tunability, and low spatial resistance.

Journal Title

Journal of Physical Chemistry C

Volume

116

Issue/Number

29

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

15415

Last Page

15420

WOS Identifier

WOS:000306725200027

ISSN

1932-7447

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