Synthesis of poly(N-isopropylacrylamide) on initiator-modified self-assembled monolayers

Langmuir

Volumn 17, Issue 9, 2001, Pages 2552-2555

  Ista, Linnea K ^a   Mendez, Sergio ^a   Pérez Luna, Víctor H ^a,b   López, Gabriel P ^a  

^a University of New Mexico   (United States)

^b ILLINOIS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BACTERIA; CARBOXYLIC ACIDS; FREE RADICAL POLYMERIZATION; PLASTIC FILMS; SELF ASSEMBLY; SYNTHESIS (CHEMICAL); ULTRATHIN FILMS; X RAY PHOTOELECTRON SPECTROSCOPY;

ULTRATHIN POLYMER FILMS;

ORGANIC POLYMERS;

EID: 0035353429     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la001257d     Document Type: Article

References (32)

1. Prucker, O.; Rühe, J. Macromolecules 1998, 31, 602-613.
2. Prucker O.; Rühe J. Langmuir 1998, 14, 6893-6898
3. Prucker, O.; Rühe, J. Macromolecules 1998, 31, 592-601
4. Huang, W.; Skanth G.; Baker, G.L.; Bruening, M.L. Langmuir 2001, 17, 1731-1736.
5. Tsubokawa, N.; Ueno, H. J. Appl. Polym. Sci. 1995, 58, 1221-1227.
6. Tsubokawa, N.; Seno, K. J. Macromol. Sci., Pure Appl. Chem. 1996, A33, 23-31.
7. Tsubokawa, N.; Satoh, M. J. Appl. Polym. Sci. 1997, 65, 2165-2172.
8. Sekar, M.M.A.; Hampton, P.D.; Buranda, T.; Lopez, G.P. J. Am. Chem. Soc. 1999, 121, 5135-5141.
9. Galaev, I.Y. Russ. Chem. Rev. 1995, 64, 471.
10. Galaev, I.Y.; Mattiasson, B. Trends Biotechnol. 1999, 17, 335-340.
11. Hoffman, A.S. MRS Bull. 1991, 16, 42-46.
12. Heskins, M.; Guillet, J.E. J. Macromol. Sci., Chem 1968, A2, 1441-1455.
13. Ista, L.K.; Pérez-Luna, V.H.; López, G.P. Appl. Environ. Microbiol. 1999, 65, 1603-1609.
14. Schild, H.G. Prog. Polym. Sci 1992, 17, 163.
15. Liang, L.; Feng, X.D.; Liu, J.; Rieke, P.C.; Fryxell, G.E. Macromolecules 1998, 31, 7845.
16. Pu, H. J. Appl. Polym. Sci. 1996, 62, 1526.
17. Takei, Y.G.; Aoki, T.; Sanui, K.; Ogata, N.; Sakurai, Y.; Okano, T. Macromolecules 1994, 27, 6163.
18. Ista, L.K.; López, G.P. J. Ind. Microbiol. Biochem. 1998, 20, 121-125.
19. Cooksey, K.E.; Wigglesworth-Cooksey, B. The design of antifouling surfaces: background and some approaches. In Biofilms: Science and Technology; Melo, L.F. et al., Eds.; Kluwer: Amsterdam, 1992; pp 529-549.
20. Costerton, J.W.; Cheng, K.-J.; Geesey, G.G.; Ladd, T.I.; Nickel, J.C.; Dasgupta, M.; Marrie, T.J. Annu. Rev. Microbiol. 1987, 41 435-464.
21. Jass, J.; Lappin-Scott, H.M. Chem. Ind. 1997, 17, 682-685.
22. Baumann, L.; Baumann, P.; Mendel, M.; Allen, R.D. J. Bacteriol. 1972, 110, 402-429.
23. Baumann, L.; Bowditch, R.D.; Baumann, P. Int. J. Syst. Bacteriol. 1983, 33, 793-802.
24. Dobson, S.J.; Franzmann, P.D. Int. J. Syst. Bacteriol. 1996, 46, 550-558.
25. Kersters, K. The genus Deleya, 2nd ed.; Kersters, K., Ed.; Springer-Verlag: New York, 1992; Vol. 4, pp 3189-3197.
26. Bain, C.D.; Troughton, E.B.; Tao, Y.-T.; Evall, J.; Whitesides, G.M. J. Am. Chem. Soc. 1989, 111, 321-335.
27. We used a similar technique and a carboxylic acid containing initiator, 4,4′-azobis(4-cyanopentanoic acid) for in situ grafting of PNIPAAM onto SAMs formed from 2-aminoethanethiol (Sigma). The films produced were much thinner than those produced on COOH-containing SAMs. When PNIPAAM was produced on these surfaces, however, the LCST behavior, the range of contact angles, and bacterial release were comparable to plasma-initiated polymers and to films made on COOH-containing SAMs.
28. Samples washed by Soxhlet extraction in acetone for 10 h showed similar ellipsometric thicknesses (∼ 170-185 Å) and LCST performance as compared to the samples washed extensively in water. To further ensure that water extraction was sufficient to remove physisorbed PNIPAAM from the surface, 0.33-COOH SAMs were spin coated with a 0.5% ethanolic solution of commercial PNIPAAM (Polysciences) and subsequently washed using the above procedures. The ellipsometric thickness of the samples (n = 3) before PNIPAAM treatment was 18.77 ± 2.5 Å. The thicknesses of PNIPAAM deposited ranged from 225 ± 1 to 306 ± 5 Å. After washing, the final thickness of the SAMs was 21.54 ± 1 Å. It should be noted that a control sample that was subjected to the same procedures without the spin coating of PNIPAAM showed a ∼4 Å difference in thicknesses before and after the rinsing procedure.
29. Bain, C.D.; Whitesides, G.M. J. Am. Chem. Soc. 1988, 110, 6560-6561.
30. Lewis, K.B.; Ratner, B.D. J. Colloid Interface Sci. 1993, 159, 77-85.
31. AW above and below the LCST increased to 63 ± 3° (n = 5) and 81.2 ± 2°, respectively, The effect of the change in absolute contact angle values was noted on bacterial release, with the films exhibiting higher contact angles attaching more but releasing fewer bacteria. These phenomena are being investigated and will be reported in detail in subsequent articles.
32. Ista, L.K.; Fan, H.; Baca, O.; López, G.P. FEMS Microbiol. Lett. 1996, 142, 59-63.