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Formation Kinetics of Mixed Self-Assembled Monolayers of Alkanethiols on GaAs(100)
Langmuir ( IF 3.9 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1021/acs.langmuir.7b00929 Vivien Lacour 1, 2 , Khalid Moumanis 1 , Walid M. Hassen 1 , Céline Elie-Caille 2 , Thérèse Leblois 2 , Jan J. Dubowski 1
Langmuir ( IF 3.9 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1021/acs.langmuir.7b00929 Vivien Lacour 1, 2 , Khalid Moumanis 1 , Walid M. Hassen 1 , Céline Elie-Caille 2 , Thérèse Leblois 2 , Jan J. Dubowski 1
Affiliation
We report on the formation kinetics of mixed self-assembled monolayers (SAMs) comprising 16-mercaptohexadecanoic acid (MHDA) and 11-mercapto-1-undecanol (MUDO) thiols on GaAs(100) substrates. These compounds were selected for their potential in constructing highly selective and efficient architectures for biosensing applications. The molecular composition and quality of one-compound and mixed SAMs were determined by the Fourier transform infrared absorption spectroscopy measurements. The formation of enhanced-quality mixed SAMs was investigated as a function of the molecular composition of the thiol mixture and the proportion of ethanol/water solvent used during their arrangement. Furthermore, the formation of mixed SAMs has been carried out by successive immersion of MHDA SAMs in MUDO thiol solutions and MUDO SAMs in MHDA thiol solution through the process involving thiol–thiol substitution. Our results, in addition to confirming that water–ethanol-based solvents improve the packing density of single thiol monolayers, demonstrate the attractive role of water–ethanol solvents in forming superior quality mixed SAMs.
中文翻译:
GaAs(100)上烷硫醇混合自组装单分子层的形成动力学
我们报告了在GaAs(100)基质上包含16-巯基十六烷酸(MHDA)和11-巯基-1-十一烷醇(MUDO)硫醇的混合自组装单分子层(SAMs)的形成动力学。选择这些化合物的原因在于它们在构建用于生物传感应用的高选择性和高效结构方面的潜力。通过傅立叶变换红外吸收光谱测量确定单化合物和混合SAM的分子组成和质量。研究了质量提高的混合SAM的形成与硫醇混合物的分子组成以及在布置过程中使用的乙醇/水溶剂的比例的关系。此外,通过将MHDA SAMs连续浸入MUDO硫醇溶液中并将MUDO SAMs浸入MHDA硫醇溶液中,通过涉及硫醇-硫醇取代的过程,可以完成混合SAMs的形成。我们的结果,除了证实水-乙醇基溶剂可提高单硫醇单分子层的堆积密度外,还证明了水-乙醇溶剂在形成优质混合SAM中的诱人作用。
更新日期:2017-11-09
中文翻译:
GaAs(100)上烷硫醇混合自组装单分子层的形成动力学
我们报告了在GaAs(100)基质上包含16-巯基十六烷酸(MHDA)和11-巯基-1-十一烷醇(MUDO)硫醇的混合自组装单分子层(SAMs)的形成动力学。选择这些化合物的原因在于它们在构建用于生物传感应用的高选择性和高效结构方面的潜力。通过傅立叶变换红外吸收光谱测量确定单化合物和混合SAM的分子组成和质量。研究了质量提高的混合SAM的形成与硫醇混合物的分子组成以及在布置过程中使用的乙醇/水溶剂的比例的关系。此外,通过将MHDA SAMs连续浸入MUDO硫醇溶液中并将MUDO SAMs浸入MHDA硫醇溶液中,通过涉及硫醇-硫醇取代的过程,可以完成混合SAMs的形成。我们的结果,除了证实水-乙醇基溶剂可提高单硫醇单分子层的堆积密度外,还证明了水-乙醇溶剂在形成优质混合SAM中的诱人作用。