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Tailoring a nanostructured plasmonic absorber for high efficiency surface-assisted laser desorption/ionization.
Zhu, Jing-Jing; Meng, Xiao; Zhang, Chi; Bian, Jie; Lu, Zhenda; Liu, Ying; Zhang, Weihua.
Afiliación
  • Zhu JJ; College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China. zwh@nju.edu.cn.
Phys Chem Chem Phys ; 20(5): 3424-3429, 2018 Jan 31.
Article en En | MEDLINE | ID: mdl-29336439
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.

Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2018 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2018 Tipo del documento: Article País de afiliación: China