scholarly journals Atomic force and optical near‐field microscopic investigations of polarization holographic gratings in a liquid crystalline azobenzene side‐chain polyester

1996 ◽  
Vol 68 (10) ◽  
pp. 1329-1331 ◽  
Author(s):  
P. S. Ramanujam ◽  
N. C. R. Holme ◽  
S. Hvilsted
Keyword(s):  
Liquid Crystalline ◽  
Near Field ◽  
Side Chain ◽  
Holographic Gratings ◽  
Atomic Force ◽  
Microscopic Investigations

Polarization holographic gratings in an azobenzene side-chain liquid-crystalline polymer

2006 ◽  
Vol 86 (4) ◽  
pp. 693-697 ◽  
Author(s):  
X. Pan ◽  
C. Wang ◽  
H. Xu ◽  
C. Wang ◽  
X. Zhang
Keyword(s):  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Side Chain ◽  
Holographic Gratings

scholarly journals Membranes for Cation Transport Based on Dendronized Poly(Epichlorohydrin-Co-Ethylene Oxide). Part 2: Membrane Characterization and Transport Properties

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3915
Author(s):  
Alireza Zare ◽  
Xavier Montané ◽  
José Antonio Reina ◽  
Marta Giamberini
Keyword(s):  
Transport Properties ◽  
Liquid Crystalline ◽  
Linear Sweep Voltammetry ◽  
Cation Transport ◽  
Side Chain ◽  
Force Microscopy ◽  
Atomic Force ◽  
Membrane Characterization ◽  
Alkaline Cations

In this paper, we report on the preparation and characterization of membranes out of two side-chain liquid crystalline copolymers, dendronized at two different extents (20 and 40%, CP20 and CP40, respectively). The membranes were characterized by atomic force microscopy (AFM), field-emission scanning electron microscopy (FESEM), contact angle (CA) analysis, and water uptake. Moreover, transport properties were studied by methanol and proton conductivity experiment and by linear sweep voltammetry (LSV). For the sake of comparison, the behavior of the grafted copolymers was compared with the unmodified copolyether CP0 and with Nafion 117. Results demonstrated that in CP20 and CP40, cation transport depends on the presence of defined cationic channels, not affected by water presence; the comparison between LSV experiments performed with different alkaline cations suggests that CP40 possesses channels with larger diameters and better-defined inner structures.

Relaxation of holographic gratings in liquid-crystalline side chain polymers with azo chromophores

1995 ◽  
Vol 196 (5) ◽  
pp. 1375-1390 ◽  
Author(s):  
Thomas Bieringer ◽  
Roland Wuttke ◽  
Dietrich Haarer ◽  
Uwe Geßner ◽  
Joachim Rübner
Keyword(s):  
Liquid Crystalline ◽  
Side Chain ◽  
Holographic Gratings

scholarly journals Steady state charge conduction through solution processed liquid crystalline lanthanide bisphthalocyanine films

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1603-1615
Author(s):  
Chandana Pal ◽  
Isabelle Chambrier ◽  
Andrew N. Cammidge ◽  
A. K. Sharma ◽  
Asim K. Ray
Keyword(s):  
Metal Ions ◽  
Liquid Crystalline ◽  
Microscopy Study ◽  
Individual Characteristics ◽  
Central Metal ◽  
Force Microscopy ◽  
Atomic Force ◽  
Double Decker ◽  
Order Of Magnitude ◽  
Chain Lengths

In-plane electrical characteristics of non-peripherally octyl(C[Formula: see text]H[Formula: see text]- and hexyl(C[Formula: see text]H[Formula: see text]-substituted liquid crystalline (LC) double decker lanthanide bisphthalocyanine (LnPc[Formula: see text] complexes with central metal ions lutetium (Lu), and gadolinium (Gd) have been measured in thin film formulations on interdigitated gold (Au) electrodes for the applied voltage ([Formula: see text] range of [Formula: see text]. The conduction mechanism is found to be Ohmic within the bias of [Formula: see text] while the bulk limited Poole–Frenkel mechanism is responsible for the higher bias. The compounds show individual characteristics depending on the central metal ions, substituent chain lengths and their mesophases. Values of 67.55 [Formula: see text]cm[Formula: see text] and 42.31 [Formula: see text]cm[Formula: see text] have been obtained for room temperature in-plane Ohmic conductivity of as-deposited octyl lutetium (C[Formula: see text]LuPc[Formula: see text] and hexyl gadolinium (C[Formula: see text]GdPc[Formula: see text] films, respectively while C[Formula: see text]GdPc[Formula: see text] films exhibit nearly two orders of magnitude smaller conductivity. On annealing at 80[Formula: see text]C, Ohmic conductivities of C[Formula: see text]LuPc[Formula: see text] and C[Formula: see text]GdPc[Formula: see text] are found to have increased but the conductivity of C[Formula: see text]GdPc[Formula: see text] decreased by more than one order of magnitude to 1.5 [Formula: see text]cm[Formula: see text]. For physical interpretation of the charge transport behavior of these three molecules, their UV-vis optical absorption spectra in the solution and in as-deposited and annealed solid phases and atomic force microscopy study have been performed. It is believed that both orientation and positional reorganizations are responsible, depending upon the size of the central ion and side chain length.

Discotic columnar liquid-crystalline polymer semiconducting materials with high charge-carrier mobility via rational macromolecular engineering

2017 ◽  
Vol 8 (21) ◽  
pp. 3286-3293 ◽  
Author(s):  
Bin Mu ◽  
Xingtian Hao ◽  
Jian Chen ◽  
Qian Li ◽  
Chunxiu Zhang ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Cost Effective ◽  
Crystalline Polymer ◽  
Charge Carrier Mobility ◽  
Optoelectronic Device ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Semiconducting Materials ◽  
Organic Semiconducting Materials ◽  
Device Applications

Well-prepared side-chain discotic liquid crystal polymers with shorter spacers in ordered columnar phases are fascinating and promising cost-effective, solution-processable organic semiconducting materials for various potential optoelectronic device applications.

New side-chain liquid crystalline terpolymers with anhydrous conductivity: effect of azobenzene substitution on light response and charge transfer

2021 ◽  
pp. 110246
Author(s):  
Sakinah Mohd Alauddin ◽  
A. Ramadan Ibrahim ◽  
Nurul Fadhilah Kamalul Aripin ◽  
Thamil Selvi Velayutham ◽  
Osama K. Abou-Zied ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Liquid Crystalline ◽  
Light Response ◽  
Side Chain

scholarly journals Phase Transitions of Side Chain Liquid Crystalline Polymers Having a Terminal Alkyl Chain.

1993 ◽  
Vol 50 (9) ◽  
pp. 687-691 ◽  
Author(s):  
Seiji UJIIE ◽  
Tamami FUKUI ◽  
Kazuko HIGAKI ◽  
Satoshi TAKAHASHI ◽  
Kazuyoshi IIMURA
Keyword(s):  
Phase Transitions ◽  
Liquid Crystalline ◽  
Alkyl Chain ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers
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