Photoalignment in Ultrathin Films of a Layer-by-Layer Deposited Water-Soluble Azobenzene Dye

Langmuir ◽  
2003 ◽  
Vol 19 (3) ◽  
pp. 654-665 ◽  
Author(s):  
Rigoberto Advincula ◽  
Mi-Kyoung Park ◽  
Akira Baba ◽  
Futao Kaneko
Keyword(s):  
Ultrathin Films ◽  
Water Soluble ◽  
Layer By Layer

Fabrication and Conductive Properties of Multilayered Ultrathin Films Designed by Layer-by-Layer Assembly of Water-Soluble Fullerenes

Langmuir ◽  
2010 ◽  
Vol 26 (16) ◽  
pp. 13472-13478 ◽  
Author(s):  
Kohji Masuda ◽  
Takefumi Abe ◽  
Hiroaki Benten ◽  
Hideo Ohkita ◽  
Shinzaburo Ito
Keyword(s):  
Ultrathin Films ◽  
Water Soluble ◽  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Conductive Properties ◽  
Layer Assembly

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

FABRICATION AND ELECTROCHROMIC PROPERTIES OF LAYER-BY-LAYER SELF-ASSEMBLED ULTRATHIN FILMS CONTAINING WATER-SOLUBLE PHTHALOCYANINE

2003 ◽  
Vol 407 (1) ◽  
pp. 97-104 ◽  
Author(s):  
Kazunari Shinbo ◽  
Keizo Kato ◽  
Futao Kaneko ◽  
Ken Onishi ◽  
Rigoberto C. Advincula ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Water Soluble ◽  
Layer By Layer ◽  
Electrochromic Properties ◽  
Self Assembled

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.

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

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.

Use of an electronic tongue in the assessment of highly diluted systems

2021 ◽  
Vol 10 (36) ◽  
pp. 104-107
Author(s):  
Mateus Silva Laranjeira ◽  
Marilisa Guimarães Lara ◽  
Marco Vinicius Chaud ◽  
Olney Leite Fontes ◽  
Antônio Riul Jr
Keyword(s):  
Ultrathin Films ◽  
Electronic Tongue ◽  
Principal Component ◽  
Original Data ◽  
Relevant Information ◽  
Statistical Correlation ◽  
Layer By Layer ◽  
Layer Technique ◽  
Liquid Systems ◽  
Complex Liquid

Introduction: “Eletronic tongue” is a device commonly used in the analysis of tastants, heavy metal ions, fruit juice, wines and also in the development of biosensors [1-3]. Briefly, the e-tongue is constituted by sensing units formed by ultrathin films of distinct materials deposited on gold interdigitated electrodes, which are immersed in liquid samples, followed by impedance spectroscopy measurements [1]. The e-tongue sensor is based on the global selectivity concept, i.e., the materials forming the sensing units are not selective to any substance in the samples, therefore, it allows the grouping of information into distinct patterns of response, enabling the distinction of complex liquid systems [1]. Aim: Our aim was to use e-tongue system for the assessment the homeopathic medicine Belladonna at different degrees of dilution, in attempt to differentiate highly diluted systems. Methods: Ultrathin films forming the sensing units were prepared by the layer-by-layer technique [4], using conventional polyelectrolytes such as poly(sodium styene sulfonate) (PSS) and poly(allylamine) hydrochloride (PAH), chitosan and poly(3,4-ethylenedioxythiophene) (PEDOT). Homeopathic medicines (Belladonna 1cH, 6cH, 12cH and 30cH) were prepared by dilution and agitation according to Hahnemann´s method [5], using ethanol at 30% (w/w) as vehicle. Experimental data acquisition was conducted by blind tests measurements involving Belladonna samples and the vehicle used in the dilutions. Five independent and consecutive measurements were taken for each solution at 1 kHz, which were further analysed by Principal Component Analysis (PCA), a statistical method largely employed to reduce the dimensionality of the original data without losing information in the correlation of the samples [3]. Results: Figure 1 shows that the five independent measurements are grouped quite closed each other for each solution analysed, with a clear distinction of them. Therefore, it was noticed a change in the observed pattern measured at different days, indicating a reduced reproducibility, although the groups of data could still be identified. Discussion: PCA is a powerful tool highly employed to extract relevant information in the correlation of data analysis of e-tongue systems. PCA plots showed a good statistical correlation of the systems (PC1 + PC2 ³ 90%), with the solutions being straightforwardly distinguished each other and also from the vehicle used. Conclusion: Despite the differences of data obtained along distinct days of analysis, the e-tongue could detect differences among the samples tested, even considering the highly diluted cases studied.

Partially ordered porous structures on layer‐by‐layer polyaniline/poly(vinyl sulfate sodium) ultrathin films: Easy fabrication of robust submicroscopic patterning

2019 ◽  
Vol 137 (17) ◽  
pp. 48597
Author(s):  
A. M. A. Faria ◽  
M. A. Miranda ◽  
G. E. Gonçalves ◽  
R. F. Bianchi ◽  
A. G. C. Bianchi ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Layer By Layer ◽  
Porous Structures ◽  
Partially Ordered ◽  
Ordered Porous
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