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The detection sensitivities of gap plasmons in gold nanoslit arrays are studied and compared with surface plasmons on outside surface. The nanoslit arrays were fabricated in a 130 nm-thick gold film with various slit widths. For transverse-magnetic (TM) incident wave, the 600 nm-period nanoslit...
A photoelectrochemical signal chain sensitive to the presence of superoxide radicals was developed on the basis of CdSe/ZnS quantum dots which were immobilized on gold electrodes using a dithiol compound. The conditions of photo current generation under illumination have been characterized with...
We report the investigation of label-free protein detection directly from lysed cells using microcantilever sensors. The integration of an internally referenced microcantilever sensor combined with peptide aptamer technology enables scalable and label-free detection of proteins from a complex...
In this work, the direct electrochemical determination of poly-histidine tagged proteins using immunosensor based on anti-His (C-term) antibody immobilized on gold electrodes modified with 1,6-hexanedithiol, gold colloid particles or gold nanorods is described. The recombinant histidine-tagged...
This paper describes the development of novel biosensor surfaces supported by robust self-assembled monolayers (SAMs) of aromatic alkanedithiol and oligo(ethylene glycol) (OEG) linker for highly sensitive surface plasmon resonance (SPR) detection of 2,4,6-trinitrotoluene (TNT). Aromatic...
A highly sensitive biosensor was developed based on bionanomultilyer with water-soluble carbon nanotubes (CNTs). The water-soluble poly(allylamine hydrochloride)-wrapped multiwall carbon nanotubes (PAH-MWNTs) can be obtained for the first time relying on the function of barbiturates, which...
A surface immobilized optical protein sensor has been utilized to detect Interleukin-8 (IL-8) protein, an oral cancer marker, and can reach limit of detection (LOD) at 1.1 pM in buffer without using enzymatic amplification. Only after applying enzymatic amplification to increase the signal level...
Four different silica sol–gel films: methyltrimethoxysilane (MTMOS), tetraethoxysilane (TEOS), 3-aminopropyltriethoxysilane (APTOS) and 3-glycidoxypropyl-trimethoxysilane (GOPMOS) assembled onto highly oriented pyrolytic graphite (HOPG) were characterized using atomic force microscopy (AFM),...
The emerging nanotechnology has opened new exciting opportunities to explore analytical applications of the freshly prepared nanostructured materials. Among them, metal-oxide-based nanowires or nanotubes attracted great attention due to their one-dimensional (1D) morphology, extraordinary...
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