Layer-by-layer self-assembly aluminum Keggin ions/Prussian blue nanoparticles ultrathin films towards multifunctional sensing applications

2007 ◽  
Vol 22 (12) ◽  
pp. 2921-2925 ◽  
Author(s):  
Geng Wang ◽  
Jianhua Zhou ◽  
Jinghong Li
Keyword(s):  
Prussian Blue ◽  
Ultrathin Films ◽  
Self Assembly ◽  
Layer By Layer ◽  
Sensing Applications ◽  
Keggin Ions ◽  
Prussian Blue Nanoparticles

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.

A rational study of the influence of Mn2+-insertion in Prussian blue nanoparticles on their photothermal properties

2021 ◽  
Author(s):  
Maëlle Cahu ◽  
Lamiaa Ali ◽  
Saad Sene ◽  
Jérôme Long ◽  
Franck Camerel ◽  
...  
Keyword(s):  
Prussian Blue ◽  
Surface State ◽  
Self Assembly ◽  
Prussian Blue Nanoparticles ◽  
One Step

We investigated a series of Mn2+-Prussian blue (PB) nanoparticles NazMnxFe1-x[Fe(CN)6]1-y□y·nH2O of similar size, surface state and cubic morphology with various amounts of Mn2+ synthesized through a one step self-assembly reaction....

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.

Nanografting of Polymer Brushes on Gold Substrate by RAFT-RIGP

2021 ◽  
Vol 7 (1) ◽  
pp. 5
Author(s):  
Bin Jeremiah D. Barba ◽  
Patricia Nyn L. Heruela ◽  
Patrick Jay E. Cabalar ◽  
John Andrew A. Luna ◽  
Allan Christopher C. Yago ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Optical Sensors ◽  
Self Assembly ◽  
Polymer Brushes ◽  
Incident Light ◽  
Organosulfur Compounds ◽  
Layer By Layer ◽  
Label Free ◽  
Sensing Applications ◽  
Wide Range

Optical sensors based on surface plasmon resonance (SPR) have made great strides in the detection of various chemical and biological analytes. A surface plasmon is a bound, non-radiative evanescent wave generated as resonant electrons on a metal–dielectric surface to absorb energy from an incident light. As analytes bind to a functionalized metal substrate, the refractometric response generated can be used for quantitation with great selectivity, sensitivity, and capacity for label-free real-time analysis. Polymer nanobrushes are ideal recognition elements because of their greater surface area and their wide range of functional versatility. Here, we introduce a simple “grafting-from” method to covalently attach nanometer-thick polymer chains on a gold surface. Nanografting on gold-coated BK-7 glass was performed in two steps: (1) self-assembly of organosulfur compounds; and (2) RAFT-mediated radiation-induced graft polymerization (RAFT-RIGP) of polyglycidyl methacrylate (PGMA). Surface modification was monitored and verified using FTIR and SPR. Layer-by-layer thickness calculated based on Winspall 3.02 simulation fitted with experimental SPR curves showed successful self-assembly of 1-dodecanethiol (DDT) monolayer with thickness measuring 1.4 nm. These alkane chains of DDT served as the graft initiation sites for RAFT-RIGP. Nanografting was controlled by adjusting the absorbed dose in the presence of chain transfer agent, 4-cyano-4-(phenylcarbonothioylthio)pentanoic acid. The molecular weight of grafted polymers measuring 2.8 and 4.3 kDa corresponded to a thickness increase of 3.6 and 7.9 nm, respectively. These stable nanografted gold substrates may be further functionalized for sensing applications.

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).

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
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