Molecular Assemblies, Patterning, and Deposition of Conjugated Polymers: Ultrathin Films Prepared using the Layer-by-Layer and Precursor Polymer Electrodeposition Approach

2001 ◽  
Vol 665 ◽  
Author(s):  
Rigoberto Advincula ◽  
Mi-kyoung Park ◽  
Chuanjun Xia
Keyword(s):  
Ultrathin Films ◽  
Conjugated Polymer ◽  
Film Formation ◽  
Molecular Assembly ◽  
Ultrathin Film ◽  
Polymer Materials ◽  
Layer By Layer ◽  
Precursor Polymer ◽  
Wet Processing ◽  
Novel Method

ABSTRACTIn this paper we present a combined protocol for ultrathin film formation and assembly of Φ- conjugated polymer materials using the layer-by-layer (LbL) technique and a precursor polymer approach to electrodeposition. While much work has been done on investigating the chemistry (synthesis) and properties (physics) of these materials, little focus has been given on the multilayer and ordering issues associated with ultrathin film formation especially using novel “wet-processing” approaches. This work details our molecular assembly approaches on conjugated polymer systems for polyfluorene and polythiophene derivatives. This was demonstrated in the following systems: a) ionene precursor polyfluorene polymers deposited as ultrathin films using the LbL technique from an aqueous solution and b) electrodeposition of polysiloxane modified precursor polymers. Important strategies are outlined for combining the two techniques as a novel method for preparing ultrathin films and patterning.

Epitaxial growth manner and structure of superconducting oxide films

1990 ◽  
Vol 48 (4) ◽  
pp. 2-3
Author(s):  
Yoshichika Bando ◽  
Takahito Terashima ◽  
Kenji Iijima ◽  
Kazunuki Yamamoto ◽  
Kazuto Hirata ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Film Surface ◽  
High Energy ◽  
Epitaxial Films ◽  
Layer By Layer ◽  
Initial Growth ◽  
In Situ Growth ◽  
High Quality ◽  
Activated Reactive Evaporation

The high quality thin films of high-Tc superconducting oxide are necessary for elucidating the superconducting mechanism and for device application. The recent trend in the preparation of high-Tc films has been toward “in-situ” growth of the superconducting phase at relatively low temperatures. The purpose of “in-situ” growth is to attain surface smoothness suitable for fabricating film devices but also to obtain high quality film. We present the investigation on the initial growth manner of YBCO by in-situ reflective high energy electron diffraction (RHEED) technique and on the structural and superconducting properties of the resulting ultrathin films below 100Å. The epitaxial films have been grown on (100) plane of MgO and SrTiO, heated below 650°C by activated reactive evaporation. The in-situ RHEED observation and the intensity measurement was carried out during deposition of YBCO on the substrate at 650°C. The deposition rate was 0.8Å/s. Fig. 1 shows the RHEED patterns at every stage of deposition of YBCO on MgO(100). All the patterns exhibit the sharp streaks, indicating that the film surface is atomically smooth and the growth manner is layer-by-layer.

Pillararene-Enriched Linear Conjugated Polymer Materials with Thiazolo[5,4-d]thiazole Linkages for Photocatalysis

2021 ◽  
Author(s):  
Zheng Li ◽  
Lu Li ◽  
Yan Wang ◽  
Ying-Wei Yang
Keyword(s):  
Band Structure ◽  
Conjugated Polymer ◽  
Polymer Materials

A heteroatom-doped conjugated polymer with tunable bandgaps is synthesized using pillararenes as electron-rich C2 symmetric nodes and thiazolo[5,4-d]thiazole as electron-deficient linkages. The influence of pillararenes in regulating band structure and...

A Facile Layer-by-Layer Adsorption and Reaction Method to the Preparation of Titanium Phosphate Ultrathin Films

2005 ◽  
Vol 17 (13) ◽  
pp. 3563-3569 ◽  
Author(s):  
Qifeng Wang ◽  
Ling Zhong ◽  
Junqi Sun ◽  
Jiacong Shen
Keyword(s):  
Ultrathin Films ◽  
Titanium Phosphate ◽  
Layer By Layer ◽  
Reaction Method ◽  
Layer Adsorption

Magnetic Moment Assisted Layer-by-Layer Film Formation of a Prussian Blue Analog

Langmuir ◽  
2013 ◽  
Vol 29 (7) ◽  
pp. 2159-2165 ◽  
Author(s):  
Abhijit Bera ◽  
Sukumar Dey ◽  
Amlan J. Pal
Keyword(s):  
Prussian Blue ◽  
Magnetic Moment ◽  
Film Formation ◽  
Layer By Layer ◽  
Layer Film ◽  
Prussian Blue Analog

Self-assembly layer-by-layer fabrication using porphyrin dye anion and polycation

2009 ◽  
Vol 13 (07) ◽  
pp. 774-778 ◽  
Author(s):  
Byung-Soon Kim ◽  
Young-A Son
Keyword(s):  
Ultrathin Films ◽  
Self Assembly ◽  
Film Surface ◽  
Layer By Layer ◽  
Preparation Technique ◽  
Force Microscopy ◽  
Atomic Force ◽  
Diallyldimethylammonium Chloride ◽  
Afm Analysis ◽  
Progressive Growth

In this study, self-assembled alternating film using poly(diallyldimethylammonium chloride) (PDDAC) and meso-tetrakis(4-carboxyphenyl)porphyrin (MTCP) was prepared as a multilayer deposition on glass substrate. This preparation technique for dye deposition may provide new feasibilities to achieve the manufacture of ultrathin films for nanotechnology application. The deposition films were characterized by UV-vis spectrophotometer and Atomic Force Microscopy (AFM) analysis. The results of UV-vis spectra showed that the absorbance characteristic of the multilayer films linearly increased with an increased number of PDDAC and MTCP bilayers. AFM analysis showed the film surface was relatively uniform and the progressive growth of layers was determined.

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