Adsorption characteristics of Au nanoparticles onto poly(4-vinylpyridine) surface revealed by QCM, AFM, UV/vis, and Raman scattering spectroscopy

Journal of Colloid and Interface Science
Kwan KimKuan Soo Shin

Abstract

In this work, we report that the adsorption and aggregation processes of Au nanoparticles on a polymer surface can be monitored by means of surface-enhanced Raman scattering (SERS) spectroscopy. Specifically, we were able to analyze the adsorption process of citrate-stabilized Au nanoparticles onto a film of poly(4-vinylpyridine) (P4VP) by taking a series of SERS spectra, during the self-assembly of Au nanoparticles onto the polymer film. In order to better analyze the SERS spectra, we separately conducted quartz crystal microbalance (QCM), UV/vis spectroscopy, and atomic force microscope (AFM) measurements. The adsorption kinetics revealed by QCM under the in situ conditions was in fair agreement with that determined by the ex situ AFM measurement. The number of Au nanoparticles adsorbed on P4VP increased almost linearly with time: 265 Au nanoparticles per 1microm(2) were adsorbed on the P4VP film after 6h of immersion. The SERS signal measured in the ex situ condition showed a more rapid increase than that of QCM; however, its increasing pattern was quite similar to that of UV/vis absorbance at longer wavelengths, suggesting that Au nanoparticles actually became agglomerated on P4VP.

References

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Citations

Oct 25, 2011·Colloids and Surfaces. B, Biointerfaces·Grzegorz Milczarek, Aleksander Ciszewski
Sep 27, 2014·ACS Applied Materials & Interfaces·Ximin ChenC Geraldine Bazuin
Aug 18, 2012·Journal of Molecular Recognition : JMR·Robert E Speight, Matthew A Cooper
Jun 1, 2011·Journal of Materials Chemistry·Wei XieChuanbin Mao
Jan 27, 2021·Analytical and Bioanalytical Chemistry·Arnaud PallottaAriane Boudier
Jan 23, 2019·Colloids and Surfaces. B, Biointerfaces·J BeurtonA Boudier
Jun 12, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Hyeong-Min KimSeung-Ki Lee

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