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Nematic Liquid Crystals (NLC) Alignment by the Oriented Nanopatterns of some Polymers Functionalized with Monochlorotriazinyl-β-Cyclodextrin

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Abstract:

This paper presents the practical strategies of obtaining the oriented nanostructured surfaces of some polymers functionalized with monochlorotriazinyl-β-cyclodextrin (MCT-β-CD) by two techniques: uniaxial rubbing or linearly polarized UV light (LPUVL) irradiation. We have chosen for the present study polymers and copolymers with exotic behavior with hydroxyl groups allowing the grafting of the reactive product monochlorotriazinyl-β-cyclodextrin or whose pyridinic nuclei can be complexated with MCT-β-CD. The obtained oriented nanostructures align colourless nematic liquid crystals (NLC) or NLC coloured with a dichroic dye. The orientation of NLC has been studied by means of polarized light FT-IR spectroscopy (IR dichroism) and polarized light UV-VIS spectroscopy (VIS dichroism). The initial polymers as well as the chemically modified products have an exotic behavior with regard to the ability of orientating the NLC. The polymers functionalized with MCT-β-CD orientate the NLC perpendicularly to the rubbing direction (or, for photopolymers, perpendicularly to the electrical vector of LPUVL).

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Journal of Nano Research Vol. 20 View Preview

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Periodical:

Journal of Nano Research (Volume 20)

Pages:

117-128

DOI:

https://doi.org/10.4028/www.scientific.net/JNanoR.20.117

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Online since:

December 2012

Authors:

Ana Maria Grigoriu, Constantin Luca, Aurelia Grigoriu, Cristina Racu, Gabriela Hitruc, Bogdan Stoica, George Ervant Grigoriu

Keywords:

Monochlorotriazinyl-β-Cyclodextrin, Oriented Nanostructured Surface, Poly-4-Vinylpyridine, Vinyl Cinnamate-Vinylalcohol Copolymer

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] D.H. Chung, Y. Takanishi, K. Ishikawa, H. Takezof, B. Park, Y. Jung, H.K. Hwang, S. Lee, K.J. Han, S. H. Jang, Alignment Mechanism of Nematic Liquid Crystal on Rubbed Polymer Surface Studied by Subsequent Processes of Rubbing and Photoalignement, Jpn. J. Appl. Phys. 39 (2000).

DOI: 10.1143/jjap.39.l185

Google Scholar

[2] K. Nakajima, H. Wakemoto, S. Sato, F. Yokotani, S. Ishihara, Y. Matsuo, Polystyrene Derivative Films for Liquid Crystal Alignment, Mol. Cryst. & Liq. Cryst. 180B (1990) 223-232.

DOI: 10.1080/00268949008042204

Google Scholar

[3] S. Frunza, G. Grigoriu, A. Grigoriu, C. Luca, L. Frunza, R. Moldovan, D.N. Stoenescu, Alignment Properties of Some Polymeric Layers, Cryst. Res. Technol. 32 (1997) 989-997.

DOI: 10.1002/crat.2170320713

Google Scholar

[4] S. Frunza, T. Beica, R. Moldovan, I. Zgura, L. Frunza, Peculiar orientation of Nematic Liquid Crystals on Rubbed Polyvinylimidazole, J. Optoelectr. Adv. Mater. 7 (2005) 2149-2157.

Google Scholar

[5] J.C. Wittmann, P. Smith, Highly oriented thin films of poly(tetrafluoroethylene) as a substrate for oriented growth of materials, Nature 352 (1991) 414- 417.

DOI: 10.1038/352414a0

Google Scholar

[6] L. Motamedi, K.J. Ihn, J.C. Wittmann, P. Smith, Friction- Transfer Layers of Polymers and their Use as Orienting Substrates, Polymer preprints 34 (1993) 760-761.

Google Scholar

[7] J.F. Moulin, M. Brinkmann, A. Thierry, J.C. Wittmann, Oriented Crystalline Films of Tris(8-hydroxyquinoline) Aluminium (III): Growth of the Alpha Polymorph onto an Ultra-Oriented Poly(tetrafluoroethylene) Substrate, Advanced materials 14 (2002).

DOI: 10.1002/1521-4095(20020318)14:6<436::aid-adma436>3.0.co;2-k

Google Scholar

[8] H. Frey, S. Sheiko, M. Moeller, J.C. Wittmann, B. Lotz, Highly Oriented Poly(di-n-alkylsilylene) Films on Oriented PTFE Substrates, Advanced materials 5 (1993) 917-919.

DOI: 10.1002/adma.19930051208

Google Scholar

[9] D.W. Berreman, Alignment of Liquid Crystals by Grooved Surfaces, Mol. Cryst. & Liq. Cryst. 23 (1973) 215-220.

Google Scholar

[10] S. Frunza, R. Moldovan, T. Beica, D. Stoenescu, M. Tintaru, Orientational properties of PVA coated SiO films, Liquid Crystals 14 (1993) 293-296.

DOI: 10.1080/02678299308027643

Google Scholar

[11] G.E. Grigoriu, A. Grigoriu, S. Frunza, D. Mihai, E.C. Buruiana, M. Onciu, Alignment of Nematic Liquid Crystals by the Cinnamic Polymers irradiated with Linear Polarized Light, 6-th International Symposium on Polymers for Advanced Technologies, Eilat, Israel, (2001).

Google Scholar

[12] D.H. Chung, Y. Takanishi, K. Ishikawa, H. Takezof, B. Park, Y. Jung, H.K. Hwang, S. Lee, K.J. Han, S. H. Jang, Alignment Mechanism of Nematic Liquid Crystal on Rubbed Polymer Surface Studied by Subsequent Processes of Rubbing and Photoalignement, Jpn. J. Appl. Phys. 39 (2000).

DOI: 10.1143/jjap.39.l185

Google Scholar

[10] M. Hasegawa, Key Molecular Structure Determination of Photoalignement Materials from the Effects of Lineraly Polarized Deep UV Light on Several Polymers, Jpn. J. Appl. Phys. 39 (2000)1272-1277.

DOI: 10.1143/jjap.39.1272

Google Scholar

[14] S. Gong, J. Knicki, L. Ma, J.Z.Z. Zhong, Ultraviolet-light Induced Liquid – Crystal Alignement on Polyimide Films, Jpn. J. Appl. Phys. 38 (1999) 5996 – 6004.

DOI: 10.1143/jjap.38.5996

Google Scholar

[15] J.H. Kim, S. Kumar, Alignement of liquid crystals on polyimide films exposed to ultraviolet light, Physical Review E 57 (1998) 5644- 5650.

DOI: 10.1103/physreve.57.5644

Google Scholar

[16] W.M. Gibbons, P.J. Shannon, S.T. Sun, B.J. Swetlin, Surface - mediated alignement of nematic liquid crystals with polarized laser light, Nature 351 (1991) 49-50.

DOI: 10.1038/351049a0

Google Scholar

[17] S.T. Sun, W.M. Gibbons, P.J. Shannon, Alignement of guest-host liquiid crystals with polarized laser light, Liquid Crystals 12 (1992) 869-874.

DOI: 10.1080/02678299208029130

Google Scholar

[18] M. Schadt, Linear and non-linear liquid crystal materials, electro-optical effects and surface interactions. Their application in present and future devices, Liquid Crystals 14 (1993) 73-104.

DOI: 10.1080/02678299308027305

Google Scholar

[19] J.H. Kim, M. Yoneya, J. Yamamoto, H. Yokoyama, Nanorubbing of a liquid Crystal alignement layer by an atomic force microscope : a detalied characterization, Nanotechnology 13 (2002) 133-137.

DOI: 10.1088/0957-4484/13/2/301

Google Scholar

[20] W. -K. Lee, P.E. Sheehan, Scanning Probe Lithography of Polymers: Tailoring Morphology and Functionality at the Nanometer Scale, Scanning 30 (2008) 172-183.

DOI: 10.1002/sca.20084

Google Scholar

[21] M. D'Acunto, S. Napolitano, P. Pingue, P. Giusti, P. Rolla, Fast formation of ripples induced By AFM. A new method for patterning polymers on naoscale, Materials Letters 61 (2007) 3305-3309.

DOI: 10.1016/j.matlet.2006.11.067

Google Scholar

[22] O.M. Leung, M. C. Goh, Orientational Order in of Polymers by Atomic Force Microscopy tip – Surface Interaction, Science 255 (1992) 64-66.

DOI: 10.1126/science.255.5040.64

Google Scholar

[23] V.K. Gupta, J.J. Skaife, T.B. Dubrovsky, N.L. Abbott, Optical Amplification of Ligand- Receptor Binding Using Liquid Crystals, Science 279 (1998) 2077-(2080).

DOI: 10.1126/science.279.5359.2077

Google Scholar

[24] A. -M. Grigoriu, C. Luca, Inclusion compounds of cyclodextrins for nanostructurated systems utilized in medical diagnose, ZFIC – fifth ed., Materials and inovative processes, Politehnium, Iasi, (2008).

Google Scholar

[25] A. -M. Grigoriu, C. Luca, New application of cyclodextrins in textile industry, Performantica, Iasi, (2010).

Google Scholar

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