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Scanning electron microscopy (SEM) plays an indispensable role in nanoscience and nanotechnology because of its high efficiency and high spatial resolution in characterizing nanomaterials. Recent progress indicates that the contrast arising from different conductivities or bandgaps can be observed in SEM images if single-walled carbon nanotubes (SWCNTs) are placed on a substrate. In this study, we...
A modified chirp scaling (CS) algorithm for processing spaceborne squinted sliding spotlight synthetic aperture radar (SAR) data is proposed in this paper. For squinted sliding spotlight mode, both the squint angle and azimuth beam steering make the spectral aliasing in azimuth. To solve this problem, the linear range cell migration correction (LRCM) and De-rotation are adopted firstly. Then a modified...
In order to achieve efficient parallel processing of the spaceborne Synthetic Aperture Radar (SAR), this paper studied the principle and flow of a compatible algorithm for imaging of spaceborne SAR based on the HLA and designed the framework of imaging system as well as the simulation of each federate. As a following, it also analyzed the method how to attain parallel processing. Furthermore, the...
Range migration of space borne SAR at large squint angle is much greater than the side-looking SAR, and longer echo receiving window is needed. Thus, the traditional beam position design method is invalid. In this paper, the method of drawing zebra map is improved by taking the range migration into consideration. The maximum and the minimum slant ranges during the synthetic time are derived. This...
In this study, we demonstrated the potential use of nucleic acid ligand (aptamers) conjugated gold nanoparticles (AuNPs) for cancer cell detection. Through specific binding of the aptamers toward platelet-derived growth factor (PDGF), MDA-MB-231 and Hs578T cells (cancer cells) that over-express PDGF, interact with Apt-AuNPs to a greater extent than do H184B5F5/M10 cells (normal cells). These results...
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