Silica passivation efficiency monitored by a surface-bound fluorescent dye

A new method for evaluating surface passivation of silicon surfaces using a strongly adsorbing and fluorescing perylenediimide (PDI) dye is reported. Silanes containing differing reactive groups delivering a trimethylsilyl moiety were investigated for their ability to passivate glass surfaces, both...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 24(2008), 16 vom: 19. Aug., Seite 8541-6
1. Verfasser: Crowe, Loretta L (VerfasserIn)
Weitere Verfasser: Tolbert, Laren M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a A new method for evaluating surface passivation of silicon surfaces using a strongly adsorbing and fluorescing perylenediimide (PDI) dye is reported. Silanes containing differing reactive groups delivering a trimethylsilyl moiety were investigated for their ability to passivate glass surfaces, both from solution and in the vapor phase, as a function of temperature and concentration. Among the silanizing agents used in this study were 1,1,1,3,3,3-hexamethyldisilazane ( HMDS), allyltrimethylsilane ( TMS-A), chlorotrimethylsilane ( TMS-Cl), N-(trimethylsilyl)imidazole ( TMS-Im), and N, N-dimethylaminotrimethylsilane ( TMS-DMA). Surface coverage was determined using fluorescence intensity. The highest surface coverage films were obtained on glass treated with HMDS vapor at 280 degrees C or with solutions of TMS-Im or TMS-DMA at 105 degrees C. These studies provide important insight into the optimal methods for surface passivation 
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