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

    Authors

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

    Comments

    Authors: contact us about adding a copy of your work at [email protected]

    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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