Molecular heterostructure devices composed of langmuir-blodgett films of conducting polymers

1992 ◽  
Vol 21 (11) ◽  
pp. 1057-1063 ◽  
Author(s):  
E. Punkka ◽  
M. F. Rubner
Keyword(s):  
Conducting Polymers ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
Heterostructure Devices

Novel Langmuir-Blodgett Films of Electrically Conducting Polyion Complexes and Diblock Copolymers

1992 ◽  
Vol 247 ◽  
Author(s):  
A. Timothy Royappa ◽  
Randall S. Saunders ◽  
Robert E. Cohen ◽  
Michael F. Rubner
Keyword(s):  
Conducting Polymers ◽  
Diblock Copolymers ◽  
Water Soluble ◽  
Molecular Organization ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
First Case ◽  
Langmuir Blodgett Films ◽  
Order Of Magnitude ◽  
Polyion Complexes

ABSTRACTThe Langmuir-Blodgett (LB) technique has been used to form two different types of multilayer films with novel molecular organizations. In the first case, a new method of fabricating superlattices of conducting polymers has been devised and studied. This method involves forming polyion complexes of acid derivatized conducting polymers with stearylamine (StNH2) and subsequently manipulating them into AB type superlattices by the LB technique. To date, superlattices consisting of isolated alternating monolayers of poly(thiophene acetic acid) (PTAA) and sulfonated polyaniline (PAn) have been studied. The layered structure of these films was found to be very similar to that of their respective homopolymer LB films, as evidenced by X-ray diffraction patterns. The conductivity of these superlattices was in the range of 10−1 S/cm, which is approximately one order of magnitude higher than that obtained with the homopolymer LB films (about 10−2 S/cm). In the second case, LB films of a novel diblock copolymer have been made, where one of the blocks is a water-insoluble polyacetylene precursor and the other block a non-conjugated, water-soluble poly(norbornene) derivative. The precursor block of the LB films could be converted to trans-polyacetylene by heating, and doped to a conductivity of 10−3 S/cm, which was significantly higher than that of cast (10−7 S/cm) or spin-coated (10−5 S/cm) films of the same material. Thus, in both cases, the unique molecular organization created by the LB technique has resulted in films with higher conductivities than those obtained by traditional casting techniques.

High-Performance Taste Sensor Made from Langmuir−Blodgett Films of Conducting Polymers and a Ruthenium Complex

2003 ◽  
Vol 75 (4) ◽  
pp. 953-955 ◽  
Author(s):  
Marystela Ferreira ◽  
Antonio Riul, ◽  
Karen Wohnrath ◽  
Fernando J. Fonseca ◽  
Osvaldo N. Oliveira, ◽  
...  
Keyword(s):  
Conducting Polymers ◽  
High Performance ◽  
Ruthenium Complex ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
Taste Sensor

Langmuir-blodgett films of liquid-crystalline heteroaromatic cations associated with diamagnetic (BF4-, CIO4-) or paramagnetic (TCNQ[math]) anions

1988 ◽  
Vol 85 ◽  
pp. 385-389 ◽  
Author(s):  
M. Vandevyver ◽  
J. Richard ◽  
A Barraud ◽  
M. Veber ◽  
C Jallabert ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

Non linear physical properties of langmuir-blodgett films : their possible applications

1988 ◽  
Vol 85 ◽  
pp. 1093-1097 ◽  
Author(s):  
G.G. Roberts ◽  
B. Holcroft ◽  
T. Richardson ◽  
R. Colbrook
Keyword(s):  
Physical Properties ◽  
Langmuir Blodgett ◽  
Non Linear ◽  
Langmuir Blodgett Films
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