Features of the Optical Response and Relaxation of the Nematic LC Doped with CdSe/ZnS Quantum Dots

被引：1

作者：

Galin, I. F. ^{[1
]}

Shcherbinin, D. P. ^{[1
]}

Gavrish, E. O. ^{[1
]}

Konshina, E. A. ^{[1
]}

机构：

[1] ITMO Univ, St Petersburg 197101, Russia

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2015年 / 612卷 / 01期

关键词：

optical response; quantum dots; Nematic liquid crystal; relaxation; response time; LIQUID-CRYSTAL; ELECTROOPTIC PROPERTIES; DEVICES; FIELD;

D O I：

10.1080/15421406.2015.1032001

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dynamics of the electro-optical response and relaxation time of nematic liquid crystal (NLC) cells doped with CdSe/ZnS semiconductor quantum dots (QDs) and homogeneously oriented by rubbed polyimide were investigated. The influence of nanoparticles' concentration as well as parameters of alternating electric field were shown. The optical response time decreased 1.5 time by increasing concentration of QDs up to 1.5mg/mL as it was compared with the pure LC. Applying unipolar square wave electric field to the LC cell reduces optical response time twice comparing to bipolar meander. However, we observed slowdown of the relaxation process both in case of doping NLC by nanoparticles and in case of applying unipolar square wave pulses.

引用

收藏

页码：261 / 266

页数：6

相关论文

共 13 条

[1] Ways of increasing the response rate of electrically controlled optical devices based on nematic liquid crystals [J].

Amosova, L. P. ;

Vasil'ev, V. N. ;

Ivanova, N. L. ;

Konshina, E. A. .

JOURNAL OF OPTICAL TECHNOLOGY, 2010, 77 (02) :79-87

[2] Evidence for directed self-assembly of quantum dots in a nematic liquid crystal [J].

Basu, Rajratan ;

Iannacchione, Germano S. .

PHYSICAL REVIEW E, 2009, 80 (01)

[3] How the electric-field parameters affect the optical response of a nematic liquid crystal [J].

Galin, I. F. ;

Konshina, E. A. .

JOURNAL OF OPTICAL TECHNOLOGY, 2014, 81 (06) :338-340

[4] Fast switching dual-frequency liquid crystal optical retarder, driven by an amplitude and frequency modulated voltage [J].

Golovin, AB ;

Shiyanovskii, SV ;

Lavrentovich, OD .

APPLIED PHYSICS LETTERS, 2003, 83 (19) :3864-3866

[5] Enhancement of electro-optic properties in liquid crystal devices via titanium nanoparticle doping [J].

Ha, Yong-Seok ;

Kim, Hyung-Jun ;

Park, Hong-Gyu ;

Seo, Dae-Shik .

OPTICS EXPRESS, 2012, 20 (06) :6448-6455

[6] Effects of size, capping agent, and concentration of CdSe and CdTe quantum dots doped into a nematic liquid crystal on the optical and electro-optic properties of the final colloidal liquid crystal mixture [J].

Kinkead, Brandy ;

Hegmann, Torsten .

JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (03) :448-458

[7] Optical transmission decay dynamics in dual-frequency nematic liquid crystal cells [J].

Konshina, E. A. ;

Fedorov, M. A. ;

Amosova, L. P. ;

Isaev, M. V. ;

Kostomarov, D. S. .

TECHNICAL PHYSICS LETTERS, 2008, 34 (05) :401-404

[8] Effect of Dispersed CdSe/ZnS Quantum Dots on Optical and Electrical Characteristics of Nematic Liquid Crystal Cells [J].

Konshina, E. A. ;

Gavrish, E. O. ;

Orlova, A. O. ;

Artem'ev, M. V. .

TECHNICAL PHYSICS LETTERS, 2011, 37 (11) :1011-1014

[9] Application of nanoparticle-induced vertical alignment in hybrid-aligned nematic liquid crystal cell [J].

Kuo, Chia-Wei ;

Jeng, Shie-Chang ;

Wang, Hsing-Lung ;

Liao, Chi-Chang .

APPLIED PHYSICS LETTERS, 2007, 91 (14)

[10] CIS-ZnS quantum dots for self-aligned liquid crystal molecules with superior electro-optic properties [J].

Lee, Won-Kyu ;

Hwang, Seung Jun ;

Cho, Min-Jae ;

Park, Hong-Gyu ;

Han, Jin-Woo ;

Song, Seogjeong ;

Jang, Jong Hyun ;

Seo, Dae-Shik .

NANOSCALE, 2013, 5 (01) :193-199