Preparation and Characterization of Biocompatible Microcapsules of Sodium Cellulose Sulfate/Chitosan by Means of Layer-by-Layer Self-Assembly

Langmuir ◽  
2009 ◽  
Vol 25 (16) ◽  
pp. 8999-9005 ◽  
Author(s):  
Yu-Liang Xie ◽  
Ming-Jun Wang ◽  
Shan-Jing Yao
Keyword(s):  
Self Assembly ◽  
Layer By Layer ◽  
Cellulose Sulfate ◽  
Sodium Cellulose Sulfate

Dumbbell-shaped dendrimers — Synthesis and self-assembly

2008 ◽  
Vol 86 (6) ◽  
pp. 540-547 ◽  
Author(s):  
Tatiana Vassilieff ◽  
Ashok Kakkar
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Layer By Layer ◽  
Acid Base ◽  
Detailed Characterization ◽  
Generation Number ◽  
Backbone Structure

We report on the synthesis and detailed characterization of dendrimers that evolve symmetrically from a linear core of 2-butyne-1,4-diol with 3,5-dihydroxybenzyl alcohol based dendron arms. The divergent layer-by-layer build-up of the dumbbell-shaped dendrimers is based on simple acid–base hydrolytic chemistry of bis(dimethylamino)dimethylsilane with OH-terminated molecules. The self-assembly of these dendrimers in THF and water is significantly influenced by their generation number, the backbone structure, and the solvent.Key words: dendrimers, divergent synthesis, macromolecules, self-assembly

Preparation and Characterization of Nano-Films Materials

2011 ◽  
Vol 492 ◽  
pp. 160-163
Author(s):  
Cai Xia Li ◽  
Qing Lv ◽  
Jie Song ◽  
Dan Yu Jiang ◽  
Qiang Li
Keyword(s):  
Self Assembly ◽  
Chemical Properties ◽  
Layered Compounds ◽  
Insertion Reaction ◽  
Layer By Layer ◽  
Vis Spectroscopy ◽  
Assembly Technique ◽  
Assembly Technology ◽  
Physical And Chemical

Nano-sheets are two-dimensional sheet materials exfoliated from the inorganic layered compounds by various physical and chemical methods. Their unique characteristics insertion reaction and excellent physical and chemical properties have attracted more and more researchers' widespread interests. Selecting quartz glass as the substrate, using layer by layer self-assembly technology, different nano-films materials are prepared. UV/Vis spectroscopy confirmed nano-films materials have been successfully assembled using LBL self-assembly technique. Raman spectrum are mainly used to analyze and characterize the structure of nano-films materials.

Preparation and characterization of polymeric thin films containing gold nanoshells via electrostatic layer-by-layer self-assembly

2014 ◽  
Vol 558 ◽  
pp. 200-207 ◽  
Author(s):  
Sang Ho Lee ◽  
Andrew C. Jamison ◽  
David M. Hoffman ◽  
Allan J. Jacobson ◽  
T. Randall Lee
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Gold Nanoshells ◽  
Layer By Layer ◽  
Polymeric Thin Films

Self-Assembly and Characterization of TiO2/PS Complex Particle and TiO2 Hollow Spheres

2011 ◽  
Vol 197-198 ◽  
pp. 136-139
Author(s):  
Fan Xiao ◽  
Wei Li ◽  
Zhi Xian Zhang ◽  
Fei Gao
Keyword(s):  
Self Assembly ◽  
Ph Value ◽  
Hollow Spheres ◽  
Layer By Layer ◽  
X Ray Diffraction ◽  
Complex Particle ◽  
Assembly Technique ◽  
Synthesized Materials ◽  
Hydrolysis Of

Using TiO2 particles obtained by hydrolysis of titanium oxysulfate as the precursor, polystyrene (PS) microspheres as the template, TiO2/PS complex particles were successfully deposited on Ti substrates through layer-by-layer self-assembly technique and the surfactant-assisted process at low temperature. Then removed PS spheres by two methods, TiO2 hollow spheres were attained. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize the synthesized materials. The results showed that the crystallization, structure and surface morphology of TiO2/PS on the surface have a great relationship with the pH value of treating solution. Diversity effects on surface integrity and bioactive of hollow spheres happened due to different ways of removing PS core.

scholarly journals Synthesis and characterization of innovative poly(lactide-co-glycolide)-(poly-l-ornithine/fucoidan) core–shell nanocarriers by layer-by-layer self-assembly

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 32786-32794 ◽  
Author(s):  
Jingqian Fan ◽  
Yuangang Liu ◽  
Shibin Wang ◽  
Yulu Liu ◽  
Siming Li ◽  
...  
Keyword(s):  
Self Assembly ◽  
Biomedical Applications ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Layer By Layer

Layer-by-Layer (LbL) self-assembly of nanocarriers has garnered the interest of researchers for a wide variety of biomedical applications.

Characterization Of SnO2 Nanoparticles Deposited Via Layer-by-Layer Self Assembly And Investigation Of Their Sensing Properties

2002 ◽  
Vol 739 ◽  
Author(s):  
R. C. Ghan ◽  
Y. Lvov ◽  
R. S. Besser
Keyword(s):  
Self Assembly ◽  
High Selectivity ◽  
Sno2 Nanoparticles ◽  
Test Chamber ◽  
The Self ◽  
Layer By Layer ◽  
Product Analysis ◽  
Glass Substrates ◽  
Self Assembled

ABSTRACTA technique of Layer-by-Layer (LbL) self-assembly is used to deposit SnO2 nanoparticles on Quartz Crystal Microbalance (QCM) resonators, and on glass substrates which the authors believe has not been previously reported. Characterization of self-assembled SnO2 layers has been performed using QCM, Scanning Electron Microscopy (SEM), and Zeta Potential analysis.We have successfully deposited SnO2 nanoparticles on QCM resonator using self-assembly technique. LbL self-assembly is a method of organization of ultra-thin films by interlayer electrostatic attraction. The thickness and mass of the self-assembled layers can be characterized by the frequency shift obtained using the QCM and empirical equations relating change in frequency with mass and thickness of deposited layers. The deposition of SnO2 nanolayers exhibited a linear reproducibility and the process of self-assembly was independent of the residence time of QCM resonator in the SnO2 nanoparticle colloidal solution. High resolution SEM analysis reveals that the SnO2 nanoparticle layers are uniformly deposited across the entire substrate. Electrical characterization was performed on SnO2 nanoparticle layers self-assembled on glass substrates which were patterned for two point (current-voltage) IV characteristic measurements. Two classes of samples were used. One sample was self-assembled glass substrate patterned with electrical contacts and calcined (baked at 350°C for one hour) to eliminate interlayered polyions and the other sample was not calcined. Results revealed that the calcined samples demonstrated linear ohmic behavior but the uncalcined showed some spurious points which we believe are due to the polyion layers.Characterization of the self-assembled SnO2 nanoparticles is being carried out with the intention of fabricating a high-selectivity μ-gas sensor. A test chamber has been fabricated and results of resistance behavior of the sensor with variation in temperature have been presented.The sensor can find applications in high selectivity sensing of chemical, industrial, domestic, and hazardous environments. After further research and development, this μ-gas sensors could be made generic to sense a variety of gases and employed for integrated on-chip product analysis in multiple chemical microsystem applications.

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