Characterization of self-assembled organic films using differential charging in X-ray photoelectron spectroscopy

Langmuir : the ACS Journal of Surfaces and Colloids
Manish DubeyJeffrey Schwartz

Abstract

Differential charging is often regarded as a problem in X-ray photoelectron spectroscopic studies, especially for insulating or partially conducting samples. Application of a positive bias can reduce the effect of differential charging by attracting stray electrons from the system, thereby compensating for the electron loss. On the other hand, differential charging effect can be enhanced by the application of a negative bias to the sample during spectrum acquisition. The successful use of the differential charging technique to distinguish between multi- and monolayer organophosphonate films on oxide-covered silicon has been reported. A detailed description of this technique is now presented which shows how differential charging can be used as an important tool for the characterization of self-assembled films deposited on various surfaces. The dependence of this technique on the conductivity of the substrate has been investigated by studying the spectral behavior of the deposited films of phosphonic acid on conducting, semiconducting, and insulating samples (stainless steel, silicon, and glass). Application of either positive or negative dc electrical bias affects the carbon core-level (C1s) line shape and intensity, which is de...Continue Reading

References

Dec 18, 2003·Journal of the American Chemical Society·Eric L HansonMehmet Fatih Danisman
Jul 27, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Ketul C PopatTejal A Desai
Jul 21, 2006·The Journal of Physical Chemistry. B·Ilknur TuncLuis M Liz-Marzán

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Citations

Aug 26, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Manish DubeyDavid G Castner
May 27, 2016·Chemical Reviews·Sergio A PaniaguaSeth R Marder
Aug 24, 2018·Antibiotics·Alexander Yu Vasil'kovAlexander V Naumkin
Oct 1, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A K M Maidul Islam, M Mukherjee
Nov 1, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Tom HauffmanHerman Terryn
Apr 17, 2008·Analytical Chemistry·Sefik SuzerAykutlu Dâna
Jan 8, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Can Pinar Conger, Sefik Suzer
Jun 28, 2008·The Journal of Physical Chemistry. B·A K M Maidul Islam, M Mukherjee
Sep 29, 2006·The Journal of Physical Chemistry. B·Sefik Suzer, Aykutlu Dâna
May 15, 2007·Journal of the American Chemical Society·Manish DubeyJeffrey Schwartz

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