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A label-free approach to selective detection of 3,3',4,4'-tetrachlorobiphenyl (PCB77) using aptamer modified silica-Au/core-shell nanoparticles (denoted as SiO2@Au core/shell NPs) through surface enhanced Raman scattering (SERS) spectroscopy was proposed. The devised system consisted of SiO2@Au core/shell NPs fixed on the amino-silane functionalized glass(More)
A new type of surface-enhanced Raman scattering (SERS) substrate consisting of β-cyclodextrin (β-CD) coated SiO2@Au@Ag nanoparticles (SiO2@Au@Ag@CD NPs) has been achieved. Our protocol was a simplified approach as the fabrication and modification of the silver shell were realized in a single-step reaction by taking advantage of β-CD as both the reducing and(More)
An improved label-free approach for highly sensitive and selective detection of 3,3',4,4'-tetrachlorobiphenyl (PCB-77), a type of polychlorinated biphenyl, via surface-enhanced Raman spectroscopy (SERS) using DNA aptamer-modified Ag-nanorod arrays as the effective substrate is reported. The devised system consists of Ag-nanorod (Ag-NR) arrays with the(More)
The objective of this paper is to investigate the major factors that influence Chinese students’ decision-making of an overseas study destination. The major education markets are USA, UK, Australia, Canada, Germany France and Japan. Chinese students constitute the largest proportion of international students in the world education market accounting for(More)
Dithiocarbamate (DTC) pesticides are widely used for fruits, vegetables, and mature crops to control fungal diseases. Their residues in food could pose a threat to human health. Therefore, a surface-enhanced Raman scattering-based (SERS-based) sensor is developed to detect DTC pesticides because SERS can provide the characteristic spectrum of pesticides and(More)
In designing robot control systems, simulation is still the primary approach to verifying the functions of circuit descriptions written in hardware design language. The validity of the verification depends on the coverage metric. But not all state spaces can be specified in a simulation. Model checking can overcome the shortcomings of simulation, because(More)
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