Reduced ionic contaminations in CdSe quantum dot dispersed ferroelectric liquid crystal and its applications

被引：24
作者：
Singh, Dharmendra Pratap [1 ]
Gupta, Swadesh Kumar [1 ]
Tripathi, Prachi [1 ]
Varia, M. C. [2 ]
Kumar, Sandeep [2 ]
Manohar, Rajiv [1 ]
机构：
[1] Univ Lucknow, Dept Phys, Liquid Crystal Res Lab, Lucknow 226007, Uttar Pradesh, India
[2] Raman Res Inst, Soft Condensed Matter Lab, Bangalore 560080, Karnataka, India
来源：
LIQUID CRYSTALS | 2014年 / 41卷 / 09期
关键词：
quantum dots; relative permittivity; ion-trapping; conductivity; ELECTROOPTICAL PROPERTIES; MAGNETIC NANOPARTICLES;
D O I：
10.1080/02678292.2014.920933
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Octadecylamine capped cadmium selenide quantum dots (CdSe QDs) were dispersed in the ferroelectric liquid crystal (FLC) FELIX 16/100. The QD dispersed FLC system was investigated on the planar anchored cell. Addition of specific concentration of the QDs in the pure FLC induces a new relaxation mode along with the Goldstone relaxation mode. QDs assisted quantum fluctuations are probably responsible for the existence of this new relaxation mode in the QDs dispersed FLC system. The ionic contaminations associated with the FLC materials were trapped on the surface of QDs due to the ion-trapping character of QDs. The trapping of ionic contaminations was confirmed by the a. c. conductivity measurement. The physical properties of the pure and dispersed FLC were carried out as a function of doping concentration of QDs, temperature and frequency.
引用
收藏
页码：1356 / 1365
页数：10
相关论文
共 31 条
  • [1] [Anonymous], 2001, CHIRALITY LIQUID CRY
  • [2] High performance holographic polymer dispersed liquid crystal systems using multi-functional acrylates and siloxane-containing epoxides as matrix components
    Cho, Y. H.
    Kawakami, Y.
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 83 (03): : 365 - 375
  • [3] Drug delivery and nanoparticles: Applications and hazards
    De Jong, Wim H.
    Borm, Paul J. A.
    [J]. INTERNATIONAL JOURNAL OF NANOMEDICINE, 2008, 3 (02): : 133 - 149
  • [4] DIELECTRIC AND OPTICAL STUDIES NEAR THE CHIRAL SMECTIC C-SMECTIC-A TRANSITION OF (S)-2-HYDROXY-4-DECYLOXYBENZYLIDENE-4'-AMINO-2P''-METHYLBUTYLCINNAMATE
    EZCURRA, A
    JUBINDO, MAP
    DELAFUENTE, MR
    ETXEBARRIA, J
    REMON, A
    TELLO, MJ
    [J]. LIQUID CRYSTALS, 1989, 4 (02) : 125 - 132
  • [5] CdSe quantum dot-dispersed DOBAMBC: an electro-optical study
    Gupta, Swadesh Kumar
    Singh, Dharmendra Pratap
    Tripathi, Pankaj Kumar
    Manohar, Rajiv
    Varia, Mahesh
    Sagar, Laxmi K.
    Kumar, Sandeep
    [J]. LIQUID CRYSTALS, 2013, 40 (04) : 528 - 533
  • [6] SWCNT doped ferroelectric liquid crystal: The electro-optical properties with enhanced dipolar contribution
    Gupta, Swadesh Kumar
    Singh, Dharmendra Pratap
    Manohar, Rajiv
    [J]. CURRENT APPLIED PHYSICS, 2013, 13 (04) : 684 - 687
  • [7] Modification in dielectric properties of SWCNT doped ferroelectric liquid crystals
    Gupta, Swadesh Kumar
    Kumar, Anish
    Srivastava, Abhishek Kumar
    Manohar, Rajiv
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 2011, 357 (07) : 1822 - 1826
  • [8] Low power operation of ferroelectric liquid crystal system dispersed with zinc oxide nanoparticles
    Joshi, T.
    Kumar, A.
    Prakash, J.
    Biradar, A. M.
    [J]. APPLIED PHYSICS LETTERS, 2010, 96 (25)
  • [9] 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
    Kinkead, Brandy
    Hegmann, Torsten
    [J]. JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (03) : 448 - 458
  • [10] Monodispersity and ordering of semiconductor quantum dots synthesised in ionic liquid crystalline phase of cadmium alkanoates
    Klimusheva, G.
    Dmitruk, I.
    Mirnaya, T.
    Tolochko, A.
    Bugaychuk, S.
    Naumenko, A.
    Melnik, D.
    Asaula, V.
    [J]. LIQUID CRYSTALS, 2013, 40 (07) : 980 - 988
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