Compact microcubic structures platform based on self-assembly Prussian blue nanoparticles with highly tuneable conductivity.
Control of molecular and supramolecular properties is used to obtain a new advanced hybrid material based on Prussian blue nanoparticles (PB NPs). This hybrid material is obtained through a self-assembled Layer-by-Layer (LbL) approach combining the advantageous features of β-cyclodextrin (β-CD) polysaccharides, PB NPs and poly(allylamine hydrochloride) from electrostatic interaction between the deposited layers. Transmission electronic microscopy images suggested that PB NPs were protected by β-CD polysaccharides that prevent the aggregation phenomena. In addition, as confirmed by scanning electronic microscopy images, it was found that PB NPs are organized in microcubic supramolecular like structures via a mesoscale self-assembly process. Interestingly, the 3-bilayer {PAH/PB-CD} film exhibited a higher density of microcubic structures and a high electrochemical response with PB sites available for redox reactions at a supramolecular level. By utilizing fewer bilayers and consequently less material deposition, the formed {PAH/PB-CD} multilayer films of a tuneable conductivity can be expected to have interesting future applications for host-guest like dependent electrochemical biosensing designs.
Institut Català de Nanotecnologia, Universitat Autônoma de Barcelona (UAB), 08193 Campus Bellaterra, Barcelona, Catalonia, Spain. welter@ufpi.edu.br
Welter
W
Cantanhêde Silva
Maria
M
Guix
Georgina
G
Alarcón Angeles
Arben
A
Merkoçi
D015374:Biosensing Techniques; D055664:Electrochemical Techniques; D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011073:Polyamines / Q000737:chemistry; D055672:Static Electricity; D047392:beta-Cyclodextrins / Q000737:chemistry
D005295:Ferrocyanides; D011073:Polyamines; D047392:beta-Cyclodextrins; C063994:polyallylamine; C031215:betadex; C000170:ferric ferrocyanide