Malachite Green Optical Sensor Based on Electrospun Polyimide Nanofiber

Electrospun nanofiber-based drug delivery systems

Electrospinning is a very simple and versatile process by which polymer nanofibers with diameters ranging from a few nanometers to several micrometers can be produced using an electrostatically driven jet of polymer solution or polymer melt. Significant progress has been made in this process throughout the past few years and electrospinning has advanced its applications in many fields, includin...

Electrospun Nanofiber Based Solid Phase Extraction

Label-free fluorescent aptamer sensor based on regulation of malachite green fluorescence.

We report a label-free fluorescent aptamer sensor for adenosine based on the regulation of malachite green (MG) fluorescence, with comparable sensitivity and selectivity to other labeled adenosine aptamer-based sensors. The sensor consists of free MG, an aptamer strand containing an adenosine aptamer next to an MG aptamer, and a bridging strand that partially hybridizes to the aptamer strand. S...

Optical pH Sensor Based on Quinizarin for Alkaline pH Regions

The development of an optical pH sensor based on immobilization of quinizarin (1,4-dihydroxyanthraquinone) on a triacetylcellulose membrane was described. The resulting membrane exhibited fast color change from yellow to violet, while changing the pH in alkaline region. The immobilized quinizarin showed a broader dynamic range from (pH 9.4-11.4) with respect to free form (pH 8.8-10.4). The sens...

Lysozyme-loaded, electrospun chitosan-based nanofiber mats for wound healing.

In this study, a blend mixture of chitosan-ethylenediaminetetraacetic acid (CS 2 wt%-EDTA) at a weight ratio of 30/70 and polyvinyl alcohol (PVA) solution (10 wt%) was electrospun to produce fibrous mats with lysozyme (10, 20 and 30 wt%) used for wound healing. The morphology and diameter of the electrospun fiber mats with and without lysozyme were analyzed by scanning electron microscopy (SEM)...