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Qian Liu Jingyi Li Hongxue Liu Ibrahim Tora Matthew S. Ide Jiwei Lu Robert J. Davis David L. Green James P. Landers
纳米研究:英文版, 2014 5Journal Article
DNA and silica-coated magnetic particles entangle and form visible aggregates under chaotropic conditions with a rotating magnetic field, in a manner that enables quantification of DNA by image analysis. As a means of exploring the mechanism of this DNA quantitation assay, nanoscale SiO2-coated Fe304 (Fe3O4@SiO2) particles are synthesized via a solvothermal method. Characterization of the particles defines them to be -200 nm in diameter with a large surface area (141.89 m2/g), possessing superparamagnetic properties and exhibiting high saturation magnetization (38 emu/g). The synthesized Fe3O4@SiO2 nanoparticles are exploited in the DNA quantification assay and, as predicted, the nanoparticles provide better sensitivity than commercial microscale Dynabeads for quantifying DNA, with a detection limit of 4 kilobase-pair fragments of human DNA. Their utility is proven using nanoparticle DNA quantification to guide efficient polymerase chain reaction (PCR) amplification of short tandem repeat loci for human identification.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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