Investigation of the Influence of Polyelectrolyte Charge Density on the Growth of Multilayer Thin Films Prepared by the Layer-by-Layer Technique

2002 ◽  
Vol 35 (3) ◽  
pp. 889-897 ◽  
Author(s):  
Bjoern Schoeler ◽  
Guruswamy Kumaraswamy ◽  
Frank Caruso
Keyword(s):  
Thin Films ◽  
Charge Density ◽  
Multilayer Thin Films ◽  
Layer By Layer ◽  
Layer Technique ◽  
Layer By Layer Technique

Stepwise fabrication of donor/acceptor thin films with a charge-transfer molecular wire motif

2016 ◽  
Vol 52 (97) ◽  
pp. 13983-13986 ◽  
Author(s):  
Yoshihiro Sekine ◽  
Taiga Yokoyama ◽  
Norihisa Hoshino ◽  
Manabu Ishizaki ◽  
Katsuhiko Kanaizuka ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Transfer ◽  
Layer By Layer ◽  
Molecular Wire ◽  
Layer Technique ◽  
Donor Acceptor ◽  
A Charge ◽  
Transfer Chain ◽  
Layer By Layer Technique ◽  
Chain Compound

Novel thin films composed of a donor/acceptor charge-transfer chain compound were fabricated by a layer-by-layer technique using complexation of a paddlewheel-type [Ru2II,II] complex with a DCNQI derivative on an ITO substrate with a pyridine-substituted phosphonate anchor.

Thin films from functionalized carbon nanotubes using the layer-by-layer technique

2014 ◽  
Vol 551 ◽  
pp. 68-73 ◽  
Author(s):  
Timo Bohnenberger ◽  
Lidija D. Rafailovic ◽  
Christian Weilach ◽  
David Hubmayr ◽  
Ulrich Schmid
Keyword(s):  
Thin Films ◽  
Carbon Nanotubes ◽  
Layer By Layer ◽  
Functionalized Carbon Nanotubes ◽  
Layer Technique ◽  
Layer By Layer Technique

Pectin-Chitosan Multilayer Coated Microbeads of Diclofenac Sodium Prepared by Layer-by-Layer Technique

2014 ◽  
Vol 1060 ◽  
pp. 45-49
Author(s):  
Kamonrak Cheewatanakornkool ◽  
Pornsak Sriamornsak
Keyword(s):  
Controlled Release ◽  
Drug Release ◽  
Diclofenac Sodium ◽  
Gastric Fluid ◽  
Layer By Layer ◽  
Release Behavior ◽  
Freeze Dried ◽  
Layer Technique ◽  
Calcium Pectinate ◽  
Layer By Layer Technique

The main objective of this study was to fabricate biopolymer-based microbeads, providing enteric properties and controlled release of diclofenac sodium, using layer-by-layer technique. The calcium pectinate microbeads have been designed and coated with chitosan and pectin multilayers. Drug release was performed in simulate gastric fluid (pH 1.2) for 2 hours, followed by pH 6.8 buffer for 8 hours. The effects of chitosan concentration, number of layer and drying technique on drug release were investigated. The results showed that the calcium pectinate microbeads could be simply prepared by ionotropic gelation and then coated with chitosan and pectin solutions using layer-by-layer procedure. The diameter of the microbeads ranged from 800 to 1000 μm for air-dried samples and from 1 to 2 mm for freeze-dried samples. The freeze-dried microbeads had a rough surface and many pores inside, as observed by SEM. The microbeads coated with 4% chitosan/4% pectin revealed a slower drug release than those coated with 1% chitosan/4% pectin and demonstrated a controlled release pattern. Moreover, different drying techniques and numbers of layer also influenced drug release behavior of the prepared microbeads.

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