Nanowire Crystals of a Rigid Rod Conjugated Polymer

2009 ◽  
Vol 131 (47) ◽  
pp. 17315-17320 ◽  
Author(s):  
Huanli Dong ◽  
Shidong Jiang ◽  
Lang Jiang ◽  
Yaling Liu ◽  
Hongxiang Li ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Rigid Rod

Phototransistors of a Rigid Rod Conjugated Polymer

2008 ◽  
Vol 112 (49) ◽  
pp. 19690-19693 ◽  
Author(s):  
Huanli Dong ◽  
Hongxiang Li ◽  
Erjing Wang ◽  
Hiroshi Nakashima ◽  
Keiichi Torimitsu ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Rigid Rod

First observation of spectral fluctuation in a single molecule of a rigid-rod π-conjugated polymer

Polymer ◽  
2001 ◽  
Vol 42 (18) ◽  
pp. 7915-7918 ◽  
Author(s):  
Ken-ichi Shinohara ◽  
Shingo Yamaguchi ◽  
Tetsuichi Wazawa
Keyword(s):  
Single Molecule ◽  
Conjugated Polymer ◽  
Rigid Rod

Ordering Rigid Rod Conjugated Polymer Molecules for High Performance Photoswitchers

Langmuir ◽  
2008 ◽  
Vol 24 (23) ◽  
pp. 13241-13244 ◽  
Author(s):  
Huanli Dong ◽  
Hongxiang Li ◽  
Erjing Wang ◽  
Zhongming Wei ◽  
Wei Xu ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
High Performance ◽  
Polymer Molecules ◽  
Rigid Rod

Molecular Orientation and Field-effect Transistors of a Rigid Rod Conjugated Polymer Thin Films

2009 ◽  
Vol 113 (13) ◽  
pp. 4176-4180 ◽  
Author(s):  
Huanli Dong ◽  
Hongxiang Li ◽  
Erjing Wang ◽  
Shouke Yan ◽  
Jianming Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Conjugated Polymer ◽  
Molecular Orientation ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Polymer Thin Films ◽  
Rigid Rod

Self-assembled multimicellar vesicles via complexation of a rigid conjugated polymer with an amphiphilic block copolymer

RSC Advances ◽  
2014 ◽  
Vol 4 (97) ◽  
pp. 54752-54759 ◽  
Author(s):  
Anbazhagan Palanisamy ◽  
Qipeng Guo
Keyword(s):  
Block Copolymer ◽  
Conjugated Polymer ◽  
Amphiphilic Block Copolymer ◽  
Flexible Coil ◽  
Rigid Rod ◽  
Assembled Complexes ◽  
Self Assembled

We report here a facile method for fabrication of multimicellar vesicles from self-assembled complexes of a flexible coil-like block copolymer and a rigid rod conjugated homopolymer.

Morphology of High-Performance Rigid-Rod Polymer Fibers and Molecular Composites

1989 ◽  
Vol 47 ◽  
pp. 338-339
Author(s):  
W.W. Adams ◽  
S. J. Krause
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Liquid Crystalline ◽  
Molecular Level ◽  
Synergistic Effects ◽  
Tensile Modulus ◽  
Commercial Development ◽  
The Matrix ◽  
Molecular Composites ◽  
Rigid Rod

Rigid-rod polymers such as PBO, poly(paraphenylene benzobisoxazole), Figure 1a, are now in commercial development for use as high-performance fibers and for reinforcement at the molecular level in molecular composites. Spinning of liquid crystalline polyphosphoric acid solutions of PBO, followed by washing, drying, and tension heat treatment produces fibers which have the following properties: density of 1.59 g/cm3; tensile strength of 820 kpsi; tensile modulus of 52 Mpsi; compressive strength of 50 kpsi; they are electrically insulating; they do not absorb moisture; and they are insensitive to radiation, including ultraviolet. Since the chain modulus of PBO is estimated to be 730 GPa, the high stiffness also affords the opportunity to reinforce a flexible coil polymer at the molecular level, in analogy to a chopped fiber reinforced composite. The objectives of the molecular composite concept are to eliminate the thermal expansion coefficient mismatch between the fiber and the matrix, as occurs in conventional composites, to eliminate the interface between the fiber and the matrix, and, hopefully, to obtain synergistic effects from the exceptional stiffness of the rigid-rod molecule. These expectations have been confirmed in the case of blending rigid-rod PBZT, poly(paraphenylene benzobisthiazole), Figure 1b, with stiff-chain ABPBI, poly 2,5(6) benzimidazole, Fig. 1c A film with 30% PBZT/70% ABPBI had tensile strength 190 kpsi and tensile modulus of 13 Mpsi when solution spun from a 3% methane sulfonic acid solution into a film. The modulus, as predicted by rule of mixtures, for a film with this composition and with planar isotropic orientation, should be 16 Mpsi. The experimental value is 80% of the theoretical value indicating that the concept of a molecular composite is valid.

Alignment of Rigid-Rod Polypeptide Chains by Solvent Quenching

2003 ◽  
Vol 771 ◽  
Author(s):  
Yuli Wang ◽  
Ying Chih Chang
Keyword(s):  
Tilt Angle ◽  
Rigid Rod ◽  
Polypeptide Chains ◽  
Poor Solvent

AbstractWe introduce a simple “solvent quenching” approach to align the rigid-rod à-helical poly(α-benzyl-L-glutamate) (PBLG) chains in the surface-grafted monolayer. By sequentially treating with a good solvent and a poor solvent, a unidirectionally aligned PBLG monolayer with an average tilt angle as small as 3° is obtained.

Scanning-tunneling spectroscopy on conjugated polymer films

2003 ◽  
Vol 771 ◽  
Author(s):  
M. Kemerink ◽  
S.F. Alvarado ◽  
P.M. Koenraad ◽  
R.A.J. Janssen ◽  
H.W.M. Salemink ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Three Dimensional ◽  
Field Enhancement ◽  
Direct Consequence ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Band Alignment ◽  
Scanning Tunneling ◽  
Order Of Magnitude

AbstractScanning-tunneling spectroscopy experiments have been performed on conjugated polymer films and have been compared to a three-dimensional numerical model for charge injection and transport. It is found that field enhancement near the tip apex leads to significant changes in the injected current, which can amount to more than an order of magnitude, and can even change the polarity of the dominant charge carrier. As a direct consequence, the single-particle band gap and band alignment of the organic material can be directly obtained from tip height-voltage (z-V) curves, provided that the tip has a sufficiently sharp apex.

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