Rectifying Self-Assembled Ultrathin Films

MRS Bulletin ◽  
2000 ◽  
Vol 25 (9) ◽  
pp. 40-46 ◽  
Author(s):  
T. P. Cassagneau ◽  
B. Sweryda-Krawiec ◽  
J. H. Fendler
Keyword(s):  
Ultrathin Films ◽  
Self Assembly ◽  
Energy Input ◽  
Room Temperature ◽  
Minimum Energy ◽  
Solution Processing ◽  
Layer By Layer ◽  
Preparation Methods ◽  
Dilute Aqueous Solutions ◽  
Viable Approach

“Soft solution processing” is rapidly becoming a viable approach for the fabrication of advanced nanostructured materials. It involves the use of environmentally friendly chemicals and preparation methods with minimum energy input. Construction of ultrathin films by the room-temperature, layer-by-layer self-assembly of dilute aqueous solutions (or dispersions) of polyelectrolytes (or polymers), nanoparticles, and nanoplatelets is clearly soft solution processing (see the articles by Yoshimura et al. in this issue).

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.

Spin-Coating Self-Assembly for Micropatterning of Ultrathin Multilayer Films

2003 ◽  
Vol 775 ◽  
Author(s):  
Hongseok Jang ◽  
Sangcheol Kim ◽  
Kookheon Char
Keyword(s):  
Ultrathin Films ◽  
Self Assembly ◽  
Multilayer Films ◽  
Process Time ◽  
Microfluidic Channels ◽  
Layer By Layer ◽  
New Approach ◽  
High Line ◽  
Spinning Process ◽  
Distinct Line

AbstractA new approach to create layer-by-layer assembled multilayer ultrathin films with welldefined micropatterns in a short process time is introduced. To achieve such micropatterns with high line resolution in organic multilayer films, microfluidic channels were combined with the convective self-assembly process employing both hydrogen bonding and electrostatic intermolecular interactions. The channels were initially filled with polymer solution by capillary pressure and the residual solution was then removed by spinning process. The micropatterns with distinct line boundaries were obtained and the small ridges were also observed at the edges of the patterned lines. Spin self-assembled vertical heterostructural multilayer patterning using (PVP/PAA)5 micropatterns, which were prepared with microfluidic channels, as a template was also investigated.

scholarly journals Nanowires by Step Decoration

MRS Bulletin ◽  
1999 ◽  
Vol 24 (8) ◽  
pp. 20-24 ◽  
Author(s):  
F.J. Himpsel ◽  
T. Jung ◽  
A. Kirakosian ◽  
J.-L. Lin ◽  
D.Y. Petrovykh ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Electronic Properties ◽  
Self Assembly ◽  
Room Temperature ◽  
Electronic Materials ◽  
Layer By Layer ◽  
Optimum Thickness ◽  
Single Digit ◽  
Cooperative Phenomenon ◽  
Nanometer Regime

Recent advances in the control of thin films and surfaces have brought an intriguing question within reach: Is it possible to tailor the electronic properties of solids by controlling them layer by layer or row by row? Customized molecules are commonplace in biochemistry. Can the same idea be brought to bear on solids and electronic materials? Electronic properties of semiconductor devices have been controlled by hetero-structures, quantum wells, and super-lattices. Magnetism as a cooperative phenomenon lends itself to manipulation in small structures, where neighbor atoms can be replaced systematically by species with stronger or weaker magnetism. In fact, a class of magnetic/nonmagnetic multilayers termed spin valves has recently been introduced into commercial read heads for magnetically stored data. The optimum thickness of their active region lies in the single-digit-nanometer regime.The smallest nanostructures may be viewed as objects consisting only of interfaces with no bulk behind them. More typically, single-digit-nanometer dimensions are sufficient for realizing the benefits of structuring (e.g., operating a quantum-well device at room temperature). This regime is difficult to reach with lithography methods, particularly when macroscopic amounts are to be fabricated. Self-assembly becomes the method of choice.

Interlayer Interactions in Self-Assembled Poly(Phenylene Vinylene) Multilayer Heterostructures, Implications for Light-Emitting and Photorectifying Diodes

1994 ◽  
Vol 369 ◽  
Author(s):  
A.C. Fou ◽  
O. Onitsuka ◽  
M. Ferreira ◽  
M.F. Rubner ◽  
B.R. Hsieh
Keyword(s):  
Ultrathin Films ◽  
Self Assembly ◽  
Organic Light Emitting Diodes ◽  
Phenylene Vinylene ◽  
Layer By Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Emission Color ◽  
Multilayer Heterostructures ◽  
Self Assembled

AbstractLayer-by-layer molecular self-assembly has been used to fabricate multilayer heterostructures containing poly(phenylene vinylene) (PPV) and a variety of polyanions. These ultrathin films exhibit widely different photoluminescence intensities and peak positions (emission color) depending on the polyanion used. The characteristics of light-emitting devices based on such films are described. This represents the first demonstration of working organic light-emitting diodes, the active layer of which consists of ultrathin, self-assembled films of between 130 - 500 Å

Layer-by-layer self-assembly of polyimide precursor/layered double hydroxide ultrathin films

2010 ◽  
Vol 518 (23) ◽  
pp. 7081-7085 ◽  
Author(s):  
Dan Chen ◽  
Shu Huang ◽  
Chao Zhang ◽  
Weizhi Wang ◽  
Tianxi Liu
Keyword(s):  
Layered Double Hydroxide ◽  
Ultrathin Films ◽  
Self Assembly ◽  
Layer By Layer ◽  
Double Hydroxide ◽  
Polyimide Precursor

Nanostructured Ultrathin Films of Water-Soluble Sexithiophene Bolaform Amphiphiles Prepared by Layer-by-Layer Self-Assembly

Langmuir ◽  
2002 ◽  
Vol 18 (3) ◽  
pp. 877-883 ◽  
Author(s):  
Jason Locklin ◽  
Ji Ho Youk ◽  
Chuanjun Xia ◽  
Mi-Kyoung Park ◽  
Xiaowu Fan ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Self Assembly ◽  
Water Soluble ◽  
Layer By Layer
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