Electrospray Ion Beam Deposition: Soft-Landing and Fragmentation of Functional Molecules at Solid Surfaces

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• 作者：Stephan Rauschenbach ; Ralf Vogelgesang ; N. Malinowski ; Jürgen W. Gerlach ; Mohamed Benyoucef ; Giovanni Costantini ; Zhitao Deng ; Nicha Thontasen ; Klaus Kern
• 刊名：ACS Nano
• 出版年：2009
• 出版时间：October 27, 2009
• 年：2009
• 卷：3
• 期：10
• 页码：2901-2910
• 全文大小：389K
• 年卷期：0
• ISSN：1936-086X

文摘

The ion beam deposition (IBD) of rhodamine dye molecules on solid surfaces in high vacuum is explored in order to characterize the possibility of fabricating molecular coatings or nanostructures from nonvolatile molecules. Molecular ion beams with a well-defined composition are deposited on silicon oxide surfaces with a controlled kinetic energy. Photoluminescence spectroscopy and time-of-flight secondary ion mass spectrometry (TOF-SIMS) are employed in order to characterize the sample with respect to coverage, homogeneity, and the fraction of intact landed ions (soft-landing ratio). We find that homogeneous rhodamine films of defined composition can be produced at energies of 2−100 eV. The coverage is found to be proportional to the ion dose. Soft-landing is observed for energies up to 35 eV.