Layer-by-layer self-assembly of polyaniline nanofibers/TiO2 nanotubes heterojunction thin film for ammonia detection at room temperature

Herein, poly (N-(4-aminophenyl) methacrylamide))-carbon nano-onions (PAPMA-CNOs = f-CNOs) and anilinated-poly (ether ether ketone) (AN-PEEK) have synthesized, and AN-PEEK/f-CNOs composite thin films were primed via layer-by-layer (LbL) self-assembly for stimuli-responsive drug release. The obtained thin films exhibited pH-responsive drug release in a controlled manner; pH 4.5 = 99.2% and pH 6.5 = 59.3% of doxorubicin (DOX) release was observed over 15 days. Supramolecular π-π stacking interactions between f-CNOs and DOX played a critical role in controlling drug release from thin films. Cell viability was studied with human osteoblast cells and augmented viability was perceived. Moreover, the thin films presented 891.4 ± 8.2 MPa of the tensile strength (σult), 43.2 ± 1.1 GPa of Young’s modulus (E), and 164.5 ± 1.7 Jg−1 of toughness (K). Quantitative scrutiny revealed that the well-ordered aligned nanofibers provide critical interphase, and this could be responsible for augmented tensile properties. Nonetheless, a pH-responsive and mechanically robust biocompatible thin-film system may show potential applications in the biomedical field.

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Fabrication and characterization of TiO2 thin film prepared by a layer-by-layer self-assembly method

Thin Solid Films ◽

10.1016/j.tsf.2005.07.001 ◽

2006 ◽

Vol 499 (1-2) ◽

pp. 83-89 ◽

Cited By ~ 50

Author(s):

Jin-Ho Kim ◽

Shiro Fujita ◽

Seimei Shiratori

Keyword(s):

Thin Film ◽

Self Assembly ◽

Tio2 Thin Film ◽

Layer By Layer ◽

Assembly Method ◽

Fabrication And Characterization

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A wearable and highly sensitive strain sensor based on a polyethylenimine–rGO layered nanocomposite thin film

Journal of Materials Chemistry C ◽

10.1039/c7tc01872j ◽

2017 ◽

Vol 5 (31) ◽

pp. 7746-7752 ◽

Cited By ~ 30

Author(s):

Xueliang Ye ◽

Zhen Yuan ◽

Huiling Tai ◽

Weizhi Li ◽

Xiaosong Du ◽

...

Keyword(s):

Thin Film ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Self Assembly ◽

Strain Sensor ◽

Layer By Layer ◽

Nanocomposite Thin Film ◽

Assembly Method ◽

Reduced Graphene ◽

Highly Sensitive

A novel strain sensor based on reduced graphene oxide with ultra-sensitive and ultra-durable performance was fabricated by the chemical layer-by-layer self-assembly method.

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Using Self-assembly and Selective Chemical Vapor Deposition for Precise Positioning of Individual Germanium Nanoparticles on Hafnia

MRS Proceedings ◽

10.1557/proc-0921-t07-09 ◽

2006 ◽

Vol 921 ◽

Author(s):

Shawn S Coffee ◽

Wyatt A Winkenwerder ◽

Scott K Stanley ◽

Shahrjerdi Davood ◽

Sanjay K Banerjee ◽

...

Keyword(s):

Thin Film ◽

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Self Assembly ◽

Room Temperature ◽

Chemical Vapor ◽

Pore Density ◽

Hot Wire ◽

Precise Positioning ◽

Selective Chemical

AbstractGermanium nanoparticle nucleation was studied in organized arrays on HfO2 using a SiO2 thin film mask with ~20-24 nm pores and a 6×1010 cm-2 pore density. Poly(styrene-b-methyl methacrylate) diblock copolymer was employed to pattern the SiO2 film. Hot wire chemical vapor deposition produced Ge nanoparticles using 4-19 monolayer Ge exposures. By seeding adatoms on HfO2 at room temperature before growth and varying growth temperatures between 725-800 K, nanoparticle size was demonstrated to be limited by Ge etching of SiO2 pore walls.

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Fluorescence Quenching Based Thin Film Sensors Employing Electrostatic Layer-by-Layer Self-Assembly

MRS Proceedings ◽

10.1557/proc-660-jj8.9 ◽

2000 ◽

Vol 660 ◽

Author(s):

Soo-Hyoung Lee ◽

J. Kumar ◽

S. K. Tripathy

Keyword(s):

Thin Film ◽

Fluorescence Quenching ◽

Chemical Sensors ◽

Self Assembly ◽

Linear Increase ◽

Layer By Layer ◽

Thin Film Sensors ◽

Optical Chemical Sensors ◽

And Performance ◽

Bimolecular Quenching

ABSTRACTIn this work, the fabrication and performance of thin film optical chemical sensors based on the fluorescence quenching of indicator molecules by several analytes such as organic nitro compounds or metal ions are described. To fabricate the sensors, a fluorescent molecule, 1- hydroxypyrene-3,6,8-trisulfonate or pyrene methanol, was covalently incorporated into poly(acrylic acid) (PAA) and subsequently the polymers were assembled with a polycation employing electrostatic layer-by-layer self-assembly into thin film structures. Fluorescence intensities decreased with increasing concentration of analytes. Quenching behavior follows Stern-Volmer bimolecular quenching kinetics. Linear increase in absorbance, film thickness and emission intensity was observed with increase in number of bilayers deposited in all multilayer films.

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