| 1. |
- Uvdal, Kajsa, et al.
(författare)
-
Vapor deposited polyaniline
- 1989
-
Ingår i: Synthetic metals. - : Elsevier. - 0379-6779 .- 1879-3290. ; 29:1, s. 451-456
-
Tidskriftsartikel (refereegranskat)abstract
- We have prepared thin films of polyaniline (emeraldine base) by an open boat evaporation process. These vapor-deposited films have a higher molecular weight than expected from a vapor deposition process, indicating a post deposition chemical process. The films have optical properties very similar to, but not identical to, these of “conventional†emeraldine. After treatment with protonic acid, the films exhibit an electrical conductivity of up to about 10% of that of conventional emeraldine salt.
|
|
| 2. |
- Lazzaroni, R., et al.
(författare)
-
Electronic Structure of Metal/Polymer Interfaces : aluminum on Conjugated Polymers
- 1991
-
Ingår i: Metallized Plastics 2. - Boston, MA : Springer. - 9781489907370 - 9781489907356 ; , s. 199-212
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Aluminum has been deposited on two types of conjugated polymers, polyalkylthiophene and polyaniline. The polymers were in the undoped, neutral form which possesses semiconducting properties. The chemical structure of the metal/polymer interface has been investigated by X-ray and UV photoelectron spectroscopy. Core level spectra indicate that aluminum reacts with the sulfur atom of the polythiophene chain, strongly perturbing the π-electron system. In the case of polyaniline, the interaction with the metal depends on the oxidation state of the polymer. UPS data, combined with the results of band structure calculations, are interpreted in terms of the Al-induced modifications of the π-electron system.
|
|
| 3. |
- Lögdlund, Michael, et al.
(författare)
-
A photoelectron spectroscopy study of the charge-induced π-electronic structural changes in α.ω.-diphenyltetradecaheptaene, a model molecule for polyacetylene
- 1993
-
Ingår i: Synthetic metals. - : Elsevier. - 0379-6779 .- 1879-3290. ; 57:2, s. 4722-4727
-
Tidskriftsartikel (refereegranskat)abstract
- The π€-electronic structural changes in diphenylpolyene, α.ω.-diphenyltetradecaheptaene, or DP7, have been studied upon gradually doping with sodium Xu using X-ray and Ultraviolet Photoelectron Spectroscopy, XPS and UPS. The spectra are interpreted with the help of the results from Austin Model 1 (AM1) and Valence Effective Hamiltonian (VEH) quantum chemical calculations. The results of the doping with sodium can be discussed in terms of two confined solitons on the polyene part of the molecule, which results in two new energy levels in the originally forbidden energy gap.
|
|
| 4. |
- Lögdlund, Michael, et al.
(författare)
-
Soliton pair charge storage in doped polyene molecules : Evidence from photoelectron spectroscopy studies
- 1993
-
Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 70:7, s. 970-973
-
Tidskriftsartikel (refereegranskat)abstract
- The π-electronic structural changes in a polyene molecule containing seven double bonds, α,ω-diphenyltetradecaheptaene (DP7), have been studied upon gradually doping with sodium, using x-ray and ultraviolet photoelectron spectroscopies. The spectra are interpreted with the help of detailed quantum chemical calculations. Analysis of the evolution of the XPS and UPS spectra as a function of doping with sodium indicates that the extra charges are stored in the form of two charged solitons on the polyene part of the molecules, which results in two new energy levels in the originally forbidden energy gap.
|
|
