Adsorbed Water Structure on Acrylate-Based Biocompatible Polymer Surface

Saptarsi Mondal, Jooyoun Kang, Kwanghee Park, Jong Min Lim, Jeong Hyon Ha, Kyungwon Kwak, Minhaeng Cho

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The role of water in the excellent biocompatibility of the acrylate-based polymers widely used for antibiofouling coating material has been realized previously. Here, we report femtosecond mid-infrared pump-probe spectroscopy of the OD stretch band of HOD molecule adsorbed on highly biocompatible poly(2-methoxyethyl) acrylate [PMEA] and poorly biocompatible poly(2-phenoxyethyl) acrylate [PPEA], both of which reveal that there are two water species with significantly different vibrational lifetime. PMEA interacts more strongly with water than PPEA through the H-bonding interaction between carbonyl (C=O) and water. The vibrational lifetime of the OD stretch in PPEA is notably longer by factors of 3 and 7 than those in PMEA and bulk water, respectively. The IR-pump visible-probe photothermal imaging further unravels substantial spatial overlap between polymer CO group and water for hydrated PMEA and a significant difference in surface morphology than those in PPEA, which exhibits the underlying relationships among polymer-water interaction, surface morphology, and biocompatibility.

Original languageEnglish
Pages (from-to)9275-9282
Number of pages8
JournalJournal of Physical Chemistry Letters
Issue number38
Publication statusPublished - 2021 Sept 30

Bibliographical note

Funding Information:
This work was supported by the Institute for Basic Science (IBS-R023-D1) (M.C.) and the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (NRF-2020R1A2C2010675) (K.K.).

Publisher Copyright:
© 2021 American Chemical Society.

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry


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