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A poly(3-methylthiophene-carbazole)/graphene oxide composite coating was prepared on a stainless steel wire through electrochemical method. It showed high extraction efficiency, thermal stability and durability than those of corresponding single-component coatings due to the synergistic effect of different components. The resulting fiber was used for the headspace solid phase microextraction of octanal,...
Intracellular acidic vesicles, constituted mostly by lysosomes, mediated a variety of biological events ranging from endocytosis, apoptosis, to cancer metastasis, etc. A chimeric molecular pH-meter (Lyso-DR), comprised of a dansyl fluorophore and proton activatable rhodamine-lactam, was prepared for ratiometric reporting of intralysosomal acidity. Exclusively confined in lysosomes, Lyso-DR exhibited...
The influence of silver ions on Escherichia coli and Staphylococcus epidermidis has been investigated by atomic force microscopy (AFM). Both single cell and cell communities were visualized, and the nanoscale ultrastructure images of these two bacteria strains before and after stimulation of silver ions were obtained. The results showed that in the case of E. coli after treatment with silver ions,...
A new antibody immobilization strategy was proposed for the fabrication of a label-free capacitive immunosensor based on electrodeposition of nanometer-sized bioactive hydroxyapatite (HAP). By a procedure of constant current cathodal electrodeposition, a nano-HAP film with bioactivity was formed on a self-assembled β-mercaptoethanol monolayer-modified gold electrode. A suitable amount of chitosan...
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