Preparation and Characterization of Sodium Alginate and Polyquaternium‐10 Hollow Microcapsules by a Layer‐by‐Layer Self‐Assembly Technique

2020 ◽  
Vol 5 (42) ◽  
pp. 13295-13299
Author(s):  
Min Wang ◽  
Huihui Zhang ◽  
Huili Shao ◽  
Gesheng Yang
Keyword(s):  
Sodium Alginate ◽  
Self Assembly ◽  
Layer By Layer ◽  
Assembly Technique

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.

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.

Flexible Layer-by-Layer Self-Assembled Graphene Based Glucose Biosensors

2011 ◽  
Author(s):  
Bo Zhang ◽  
Tony Zhengyu Cui
Keyword(s):  
Self Assembly ◽  
Low Cost ◽  
Glucose Biosensor ◽  
Layer By Layer ◽  
Glucose Biosensors ◽  
Flexible Polymer ◽  
Assembly Technique ◽  
Self Assembled ◽  
The Cost

The manufacture and characterization of glucose biosensor based on layer by layer self assembled graphene are presented. Due to self assembly technique and flexible polymer substrate, the cost of the biosensor is very competitive. The resolution of the graphene based biosensor reaches down to 10 pM, which shows greater advantages over CNT based biosensor under the same conditions. The response time of graphene biosensor is less than 3 s, which is much faster than other materials and methods. This work demonstrates that graphene and polymers are very promising materials for the applications of low-cost glucose biosensors.

Preparation and Characterization of Quaternary Chitosan/sodium Alginate Self-Assembled Microcapsules

2012 ◽  
Vol 554-556 ◽  
pp. 263-267
Author(s):  
Hui Chen ◽  
Xiao Hui Wang ◽  
Dong Li ◽  
Yan Zhu Guo ◽  
Run Cang Sun
Keyword(s):  
Sodium Alginate ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Red Light ◽  
Formaldehyde Resin ◽  
Layer By Layer ◽  
Light Emitting ◽  
Resin Microspheres ◽  
Self Assembled

Biocompatible quaternary chitosan/sodium alginate multilayer microcapsules were prepared by layer-by-layer (LBL) self-assembly on the template of monodispersed melamine formaldehyde resin microspheres (MF). The process of self-assembly was monitored by measuring the surface zeta-potential of colloidal particles. The particle size was determined by digital light scattering (DLS) after each deposition, and the average thickness of monolayer film was revealed to be 3.9 nm. Using rhodamine B-labeled quaternary chitosan as the positive polyelectrolyte and sodium alginate as the negative polyelectrolyte, self-assembled multilayer microcapsules with strong red-light emitting were obtained and observed with fluorescence microscope. The fluorescent microcapsules self-assembled from the biocompatible natural polysaccharides may be potentially applied in drug delivery and fluorescence diagnosis.

Fabrication and characterization of Ag/polymer nanocomposite films through layer-by-layer self-assembly technique

2007 ◽  
Vol 515 (20-21) ◽  
pp. 7870-7875 ◽  
Author(s):  
Xiaohong Liu ◽  
Jinqing Wang ◽  
Junyan Zhang ◽  
Bin Liu ◽  
Jinfang Zhou ◽  
...  
Keyword(s):  
Self Assembly ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Layer By Layer ◽  
Assembly Technique ◽  
Fabrication And Characterization

Multilayer composite beads constructed via layer-by-layer self-assembly for lysozyme controlled release

RSC Advances ◽  
2014 ◽  
Vol 4 (46) ◽  
pp. 24369-24376 ◽  
Author(s):  
Jiemin Zhao ◽  
Xiaoping Wang ◽  
Yanshen Kuang ◽  
Yufeng Zhang ◽  
Xiaowen Shi ◽  
...  
Keyword(s):  
Controlled Release ◽  
Self Assembly ◽  
Cross Linking ◽  
Layer By Layer ◽  
Multilayer Composite ◽  
Composite Beads ◽  
Assembly Technique ◽  
Positively Charged

Alginate (ALG)–lysozyme (LZ) beads were fabricated by a cross-linking process. Negatively charged ALG and positively charged LZ were alternately deposited on the positively charged ALG–LZ beads via a layer-by-layer (LBL) self-assembly technique.

scholarly journals Fabrication and in vitro evaluation of stable collagen/hyaluronic acid biomimetic multilayer on titanium coatings

2013 ◽  
Vol 10 (84) ◽  
pp. 20130070 ◽  
Author(s):  
Haiyong Ao ◽  
Youtao Xie ◽  
Honglue Tan ◽  
Shengbing Yang ◽  
Kai Li ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Photoelectron Spectroscopy ◽  
Self Assembly ◽  
Human Mesenchymal Stem Cells ◽  
Biological Properties ◽  
Covalent Immobilization ◽  
Layer By Layer ◽  
Titanium Coating ◽  
Assembly Technique

Layer-by-layer (LBL) self-assembly technique has been proved to be a highly effective method to immobilize the main components of the extracellular matrix such as collagen and hyaluronic acid on titanium-based implants and form a polyelectrolyte multilayer (PEM) film by electrostatic interaction. However, the formed PEM film is unstable in the physiological environment and affects the long-time effectiveness of PEM film. In this study, a modified LBL technology has been developed to fabricate a stable collagen/hyaluronic acid (Col/HA) PEM film on titanium coating (TC) by introducing covalent immobilization. Scanning electron microscopy, diffuse reflectance Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the PEM film. Results of Sirius red staining demonstrated that the chemical stability of PEM film was greatly improved by covalent cross-linking. Cell culture assays further illustrated that the functions of human mesenchymal stem cells, such as attachment, spreading, proliferation and differentiation, were obviously enhanced by the covalently immobilized Col/HA PEM on TCs compared with the absorbed Col/HA PEM. The improved stability and biological properties of the Col/HA PEM covalently immobilized TC may be beneficial to the early osseointegration of the implants.

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