Abstract

Electro-optic performance of a liquid-crystal (LC) system is enhanced by TiO2 nanoparticle dispersed in nematic liquid crystal (NLC). The 2.5V threshold voltage of LC for device operation is lowered to 0.5V through TiO2 nanoparticle mixing up to 2wt.%. To characterize the shape and size distribution of the nanoparticles, high-resolution transmission electron microscopy is employed. Transmittance spectra for the TiO2 dispersed LC structure and nondispersed LC structure showed that transparency of the TiO2 dispersed LC is similar to that of pure liquid LC.

© 2009 Optical Society of America

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2008

M. Kaczmarek, O. Buchnev, and I. Nandhakumar, Appl. Phys. Lett. 92, 103307 (2008).
[CrossRef]

S. Chuangchote, T. Sgawa, and S. Yoshikawa, Appl. Phys. Lett. 93, 033310 (2008).
[CrossRef]

2007

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

2006

J. H. Park and O. O. Park, Appl. Phys. Lett. 89, 193101 (2006).
[CrossRef]

I. C. Khoo, K. Chen, and Y. Z. Williams, IEEE J. Sel. Top. Quantum Electron. 12, 443 (2006).
[CrossRef]

I. C. Khoo, D. H. Werner, X. Liang, A. Diaz, and B. Weiner, Opt. Lett. 31, 2592 (2006).
[CrossRef] [PubMed]

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

2004

P. N. Pradad, Curr. Opin. Solid State Mater. Sci. 8, 11 (2004).
[CrossRef]

1999

B. Xia, H. Haung, and Y. Xie, Mater. Sci. Eng., B 57, 150 (1999).
[CrossRef]

1986

H. Mada and K. Osajima, J. Appl. Phys. 60, 3111 (1986).
[CrossRef]

Aslam, F.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Binks, D. J.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Buchnev, O.

M. Kaczmarek, O. Buchnev, and I. Nandhakumar, Appl. Phys. Lett. 92, 103307 (2008).
[CrossRef]

Chen, K.

I. C. Khoo, K. Chen, and Y. Z. Williams, IEEE J. Sel. Top. Quantum Electron. 12, 443 (2006).
[CrossRef]

Chen, Q.

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

Chuangchote, S.

S. Chuangchote, T. Sgawa, and S. Yoshikawa, Appl. Phys. Lett. 93, 033310 (2008).
[CrossRef]

Daniels, S.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Diaz, A.

Haung, H.

B. Xia, H. Haung, and Y. Xie, Mater. Sci. Eng., B 57, 150 (1999).
[CrossRef]

Kaczmarek, M.

M. Kaczmarek, O. Buchnev, and I. Nandhakumar, Appl. Phys. Lett. 92, 103307 (2008).
[CrossRef]

Khoo, I. C.

I. C. Khoo, K. Chen, and Y. Z. Williams, IEEE J. Sel. Top. Quantum Electron. 12, 443 (2006).
[CrossRef]

I. C. Khoo, D. H. Werner, X. Liang, A. Diaz, and B. Weiner, Opt. Lett. 31, 2592 (2006).
[CrossRef] [PubMed]

Lee, J. E.

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

Liang, X.

Lin, M. R.

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

Mada, H.

H. Mada and K. Osajima, J. Appl. Phys. 60, 3111 (1986).
[CrossRef]

Nandhakumar, I.

M. Kaczmarek, O. Buchnev, and I. Nandhakumar, Appl. Phys. Lett. 92, 103307 (2008).
[CrossRef]

Nehring, J.

T. Scheffer and J. Nehring, in Liquid Crystals: Applications and Uses, B.Bahadur, ed. (World Scientific, 1990), Vol. 1, p. 232.

O'Brien, P.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Osajima, K.

H. Mada and K. Osajima, J. Appl. Phys. 60, 3111 (1986).
[CrossRef]

Park, J. H.

J. H. Park and O. O. Park, Appl. Phys. Lett. 89, 193101 (2006).
[CrossRef]

Park, O. O.

J. H. Park and O. O. Park, Appl. Phys. Lett. 89, 193101 (2006).
[CrossRef]

Pickett, N. L.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Pradad, P. N.

P. N. Pradad, Curr. Opin. Solid State Mater. Sci. 8, 11 (2004).
[CrossRef]

Scheffer, T.

T. Scheffer and J. Nehring, in Liquid Crystals: Applications and Uses, B.Bahadur, ed. (World Scientific, 1990), Vol. 1, p. 232.

Sgawa, T.

S. Chuangchote, T. Sgawa, and S. Yoshikawa, Appl. Phys. Lett. 93, 033310 (2008).
[CrossRef]

Stevenson-Hill, J.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Weiner, B.

Werner, D. H.

Williams, Y. Z.

I. C. Khoo, K. Chen, and Y. Z. Williams, IEEE J. Sel. Top. Quantum Electron. 12, 443 (2006).
[CrossRef]

Xia, B.

B. Xia, H. Haung, and Y. Xie, Mater. Sci. Eng., B 57, 150 (1999).
[CrossRef]

Xie, Y.

B. Xia, H. Haung, and Y. Xie, Mater. Sci. Eng., B 57, 150 (1999).
[CrossRef]

Yin, S.

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

Yoshikawa, S.

S. Chuangchote, T. Sgawa, and S. Yoshikawa, Appl. Phys. Lett. 93, 033310 (2008).
[CrossRef]

Zhang, Q. M.

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

Appl. Phys. Lett.

Q. Chen, M. R. Lin, J. E. Lee, Q. M. Zhang, and S. Yin, Appl. Phys. Lett. 89, 141121 (2006).
[CrossRef]

J. H. Park and O. O. Park, Appl. Phys. Lett. 89, 193101 (2006).
[CrossRef]

M. Kaczmarek, O. Buchnev, and I. Nandhakumar, Appl. Phys. Lett. 92, 103307 (2008).
[CrossRef]

S. Chuangchote, T. Sgawa, and S. Yoshikawa, Appl. Phys. Lett. 93, 033310 (2008).
[CrossRef]

Chem. Phys.

F. Aslam, J. Stevenson-Hill, D. J. Binks, S. Daniels, N. L. Pickett, and P. O'Brien, Chem. Phys. 334, 45 (2007).
[CrossRef]

Curr. Opin. Solid State Mater. Sci.

P. N. Pradad, Curr. Opin. Solid State Mater. Sci. 8, 11 (2004).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron.

I. C. Khoo, K. Chen, and Y. Z. Williams, IEEE J. Sel. Top. Quantum Electron. 12, 443 (2006).
[CrossRef]

J. Appl. Phys.

H. Mada and K. Osajima, J. Appl. Phys. 60, 3111 (1986).
[CrossRef]

Mater. Sci. Eng., B

B. Xia, H. Haung, and Y. Xie, Mater. Sci. Eng., B 57, 150 (1999).
[CrossRef]

Opt. Lett.

Other

T. Scheffer and J. Nehring, in Liquid Crystals: Applications and Uses, B.Bahadur, ed. (World Scientific, 1990), Vol. 1, p. 232.

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Figures (5)

Fig. 1
Fig. 1

XRD pattern of synthesized Ti O 2 nanoparticles. The inset shows the HRTEM micrograph of synthesized Ti O 2 nanoparticles.

Fig. 2
Fig. 2

Transmittance spectra of both LC system mixed with 2% Ti O 2 nanoparticle and the pure LC system. A non-LC is also shown for comparison. The inset shows a schematic of hybridized LC systems.

Fig. 3
Fig. 3

LC orientation and pretilt angle: (a), (b) photomicrograph of VA-LCD cells (A, analyzer; P, polarizer) and (c) transmittance and incidence angle obtained from the pretilt angle measurements [black (blue online) curve, simulated curve; gray (red online) curve, experimental curve].

Fig. 4
Fig. 4

V-T curves of the Ti O 2 hybridized VA LCDs on the PI surface. The weight percent of the Ti O 2 varies from 0 wt. % to 2.0 wt. % with increments of 0.5 wt. % .

Fig. 5
Fig. 5

Threshold voltage of Ti O 2 -doped VA-LCDs as a function of doping concentrations. The inset shows switching voltage amplitude for device operation.

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