Journal
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
Volume 35, Issue 11, Pages 1377-1385Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10295-008-0458-y
Keywords
Biochip; Dielectrophoresis; Gold nanoparticles; Detection; Salmonella
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This study developed a method of detecting bioparticles such as Salmonella that exist in the biological samples. The method employed a substrate with interlaced comb-like electrodes into which the mixtures of biological samples and antibody-coated gold nanoparticles were added. The alternative signals with appropriate frequency bands were then conducted into the comb-like electrodes to change the dielectrophoresis force. The gold-modified Salmonella can be adsorbed on the edges of the electrodes and isolated from various biological samples. The impedance of the adsorbed Salmonella on the edges of the electrodes was measured and comparison of the impedance between the electrodes with and without Salmonella can quantify the amount of the adsorbed Salmonella.
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