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Issue 5, 2018
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Tailoring a nanostructured plasmonic absorber for high efficiency surface-assisted laser desorption/ionization

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Abstract

The surface-assisted laser desorption/ionization (SALDI) effect is investigated on Au plated anodized aluminum oxide (Au/AAO) thin films, a new type of low-cost broadband plasmonic absorber, which has attracted a lot of attention recently. Mass spectrometry (MS) measurements show that the ionization efficiency of Au/AAO substrates can be significantly improved (×30 fold) by simply tuning the size of nanopores in Au/AAOs. This leads to a signal-to-noise ratio of 394, which is 4 times better than the result obtained using the conventional matrix-assisted laser desorption/ionization (MALDI)-MS technique. Experimental and theoretical studies show that the dramatic improvement is caused by the pore-size-dependent optical and thermal properties of Au/AAOs. It provides a simple yet effective strategy for designing and building high performance plasmonic SALDI substrates.

Graphical abstract: Tailoring a nanostructured plasmonic absorber for high efficiency surface-assisted laser desorption/ionization

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Publication details

The article was received on 24 Oct 2017, accepted on 03 Jan 2018 and first published on 03 Jan 2018


Article type: Communication
DOI: 10.1039/C7CP07219H
Citation: Phys. Chem. Chem. Phys., 2018,20, 3424-3429
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    Tailoring a nanostructured plasmonic absorber for high efficiency surface-assisted laser desorption/ionization

    J. Zhu, X. Meng, C. Zhang, J. Bian, Z. Lu, Y. Liu and W. Zhang, Phys. Chem. Chem. Phys., 2018, 20, 3424
    DOI: 10.1039/C7CP07219H

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