Rapid Octadecylphosphonic Acid Self-Assembled Monolayer Formation on Cu for Etch Inhibition: Characterizations Using Sum Frequency Generation Vibrational Spectroscopy

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-02-18 DOI:10.1021/acs.langmuir.4c05097

Trace Johnson, Jayani Mawela, Yuchen Wu, Haci Osman Guevenc, Andreas Klipp, Rohini Gupta, Sabine Hirth, Zhan Chen

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Abstract

Self-assembled monolayers (SAMs) can be used to modify surface properties in a large area, which have wide applications ranging from corrosion inhibition, electronic device fabrication, oil/water separation, to biosensors. In industry, it is required to deposit a monolayer on copper substrate for etch inhibition within a short period of time. This study developed a simple method to satisfy such a need in industry. The SAM was deposited by using octadecylphosphonic acid (ODPA) solution. The quality of the prepared ODPA SAM on copper was compared to that of the SAM prepared using octadecanethiol (ODT) on copper. Sum frequency generation (SFG) vibrational spectroscopy was applied to characterize the deposited SAMs. It was found that ODPA SAMs prepared with 2 min of deposition time using ODPA solutions with concentrations of 0.05%, 0.1%, and 0.2% only have small numbers of gauche defects, with 80% or more methyl surface coverages compared to ODT SAMs. The deduced methyl group orientations of such ODPA SAMs are similar to that of the ODT SAM methyl groups. This study successfully demonstrated the feasibility of preparing relatively good quality ODPA SAMs on copper using a short deposition time.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).