Analysis of self-assembled monolayers on gold surfaces using direct analysis in real time mass spectrometry

被引：63

作者：

Kpegba, Kafui

Spadaro, Tycho

Cody, Robert B.

Nesnas, Nasri

Olson, Joel A.

机构：

[1] Florida Inst Technol, Melbourne, FL 32901 USA

[2] Jeol USA Inc, Peabody, MA 01960 USA

来源：

ANALYTICAL CHEMISTRY | 2007年 / 79卷 / 14期

关键词：

D O I：

10.1021/ac062276g

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Mass spectrometry was performed on self-assembled monolayers (SAMs) of dodecanethiol on gold using the new direct analysis in real time (DART) ionization technique. Observed peaks for the SAMs included monomers, dimers, and trimers of the SAM molecules, with the dimer and trimer relative peak heights enhanced as compared to the spectra for neat dodecanethiol. The possibility that the observed peaks were due to residual (noncovalently bonded) material on the surface was tested by attempting to observe residual dodecanol. No peaks corresponding to dodecanol were observed. These results indicate that DART is an excellent ionization method for the direct and unambiguous mass analysis of chemical species in self-assembled monolayers.

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收藏

页码：5479 / 5483

页数：5

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