Nanotribological and nanomechanical properties of plasma-polymerized polyterpenol thin films
Tóm tắt
Organic plasma polymers are currently attracting significant interest for their potential in the areas of flexible optoelectronics and biotechnology. Thin films of plasma-polymerized polyterpenol fabricated under varied deposition conditions were studied using nanoindentation and nanoscratch analyses. Coatings fabricated at higher deposition power were characterized by improved hardness, from 0.33 GPa for 10 W to 0.51 GPa for 100 W at 500-μN load, and enhanced wear resistance. The elastic recovery was estimated to be between 0.1 and 0.14. Coatings deposited at higher RF powers also showed less mechanical deformation and improved quality of adhesion. The average (Ra) and root mean square (Rq) surface roughness parameters decreased, from 0.44 nm and 0.56 nm for 10 W to 0.33 nm and 0.42 nm for 100 W, respectively.
Tài liệu tham khảo
S.R. Forrest: The path to ubiquitous and low-cost organic electronic appliances on plastic. Nature 428 (6986), 911 (2004).
F.F. Shi: Recent advances in polymer thin films prepared by plasma polymerization: Synthesis, structural characterization, properties and applications. Surf. Coat. Technol. 82 (1–2), 1 (1996).
B.D. Beake, S. Zheng, and M.R. Alexander: Nanoindentation testing of plasma-polymerised hexane films. J. Mater. Sci. 37 (18), 3821 (2002).
V. Cech: Plasma polymer film as a model interlayer for polymer composites. IEEE Trans. Plasma Sci. 34 (4), 1148 (2006).
K. Bazaka, M.V. Jacob, and B.F. Bowden: Optical and chemical properties of polyterpenol thin films deposited via plasma-enhanced CVD. J. Mater. Res. 26, 1018 (2011).
K. Bazaka and M.V. Jacob: Synthesis of radio frequency plasma polymerized non-synthetic terpinen-4-ol thin films. Mater. Lett. 63 (18–19), 1594 (2009).
K. Bazaka and M.V. Jacob: Effect of iodine doping on surface and optical properties of polyterpenol thin films. Mater Sci. Forum 654–, 1764 (2010).
K. Bazaka and M.V. Jacob: Post-deposition ageing reactions of plasma derived polyterpenol thin films. Polym. Degrad. Stabil. 95 (6), 1123 (2010).
K. Bazaka, M.V. Jacob, V.K. Truong, F. Wang, W.A. Pushpamali, J. Wang, A. Ellis, C.C. Berndt, R.J. Crawford, and E.P. Ivanova: Effect of plasma-enhanced chemical vapour deposition on the retention of antibacterial activity of terpinen-4-ol. Biomacromolecules 11 (8), 2016 (2010).
K. Bazaka, M.V. Jacob, and E.P. Ivanova: A study of a retention of antimicrobial activity by plasma polymerized terpinen-4-ol thin films. Mater. Sci. Forum 654–, 2261 (2010).
M.V. Jacob, K. Bazaka, M. Weis, D. Taguchi, T. Manaka, and M. Iwamoto: Fabrication and characterization of polyterpenol as an insulating layer and incorporated organic field effect transistor. Thin Solid Films 518 (21), 6123 (2010).
K. Bazaka, M.V. Jacob, D. Taguchi, T. Manaka, and M. Iwamoto: Investigation of interfacial charging and discharging in double-layer pentacene-based metal-insulator-metal device with polyterpenol blocking layer using electric field induced second harmonic generation. Chem. Phys. Lett. 503 (1–3), 105 (2011).
W.C. Oliver and G.M. Pharr: An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mater. Res. 7, 1564 (1992).
F. Abbes, M. Troyon, J.M. Meza, and S. Potiron: Finite element analysis of the penetration depth/tip radius ratio dependence on the correction factor ß in instrumented indentation of elastic–plastic materials. J. Micromech. Microeng. 20 (6), 065003 (2010).
Y. Chen, S.R. Bakshi, and A. Agarwal: Correlation between nanoindentation and nanoscratch properties of carbon nanotube reinforced aluminum composite coatings. Surf. Coat. Technol. 204 (16–17), 2709 (2010).
S.B. Lafaye and M. Troyon: On the friction behaviour in nanoscratch testing. Wear 261 (7–8), 905 (2006).
C. Brechignac, P. Houdy, and M. Lahmani: Nanomaterials and Nanochemistry (Springer, New York, 2008).
X. Hu, X. Zhao, A. Uddin, and C.B. Lee: Preparation, characterization and electronic and optical properties of plasma-polymerized nitriles. Thin Solid Films 477 (1–2), 81 (2005).
M. Pelliccione and T-M. Lu: Evolution of Thin Film Morphology (Springer, New York, 2008), p. 203.
G.W. Collins, S.A. Letts, E.M. Fearon, R.L. McEachern, and T.P. Bernat: Surface roughness scaling of plasma polymer films. Phys. Rev. Lett. 73 (5), 708 (1994).
E.E. Johnston and B.D. Ratner: Surface characterization of plasma deposited organic thin films. J. Electron Spectrosc. Relat. Phenom. 81 (3), 303 (1996).
S.F. Lamolle, M. Monjo, M. Rubert, H.J. Haugen, S.P. Lyngstadaas, and J.E. Ellingsen: The effect of hydrofluoric acid treatment of titanium surface on nanostructural and chemical changes and the growth of MC3T3-E1 cells. Biomaterials 30 (5), 736 (2009).
E.S. Gadelmawla, M.M. Koura, T.M.A. Maksoud, I.M. Elewa, and H.H. Soliman: Roughness parameters. J. Mater. Process. Technol. 123 (1), 133 (2002).
R.N. Wenzel: Resistance of solid surfaces to wetting by water. Ind. Eng. Chem. 28 (8), 988 (1936).
J.M. Kranenburg, C.A. Tweedie, K.J. van Vliet, and U.S. Schubert: Challenges and progress in high-throughput screening of polymer mechanical properties by indentation. Adv. Mater. 21 (35), 3551 (2009).
C.A. Tweedie, G. Constantinides, K.E. Lehman, D.J. Brill, G.S. Blackman, and K.J. van Vliet: Enhanced stiffness of amorphous polymer surfaces under confinement of localized contact loads. Adv. Mater. 19 (18), 2540 (2007).
V. Cech, B. Cechalova, R. Trivedi, and J. Studynka: Single layer and multilayered films of plasma polymers analyzed by nanoindentation and spectroscopic ellipsometry. Thin Solid Films 517 (21), 6034 (2009).
I.S. Bae, S.J. Cho, W.S. Choi, H.J. Cho, B. Hong, H.D. Jeong, and J.H. Boo: Characterization on polymerized thin films for low-k insulator using PECVD. Prog. Org. Coat. 61 (2–4), 245 (2008).
E.C. Rangel, N.C. Cruz, and C.M. Lepienski: Effect of helium implantation on the properties of plasma polymer films. Nucl. Instrum. Methods Phys. Res., Sect. B 191 (1–4), 704 (2002).
F. Benítez, E. Martínez, and J. Esteve: Improvement of hardness in plasma polymerized hexamethyldisiloxane coatings by silica-like surface modification. Thin Solid Films 377–, 109 (2000).