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A stable nanosilver solution was prepared, using PEG10000 as stabilizer and NaBH 4 as reducer. In pH 6.6 Na 2 HPO 4 –NaH 2 PO 4 buffer solution containing PEG10000 and NaCl, the nanosilvers (AgNPs) were aggregated to form the stable nanosilver-aggregation (AgNPA) that could conjugate with 4-mercaptopyridine (MPy) to obtain an AgNPA-MPy surface-enhanced Raman...
The 5 nm AuPd nanoalloy in mole ratio of Au:Pd=32:1 was prepared, using sodium citrate as the stabilizing agent and NaBH4 as the reductant. The AuPd nanoalloy was modified by the aptamer to prepare an aptamer‐ AuPd (AptAuPd) probe for resonance scattering (RS) detection of 5.0–1250 nmol/L Hg2+. The AptAuPd‐Hg2+ aptamer reaction solution was filtrated by membrane, and the AptAuPd in the filtrate exhibited...
Single strand DNA (ssDNA) was used to modify nanogold to obtain a nanogold-aptamer resonance scattering (RS) probe (NGssDNA) for Hg 2+ , based on the formation of stable thymine-Hg 2+ -thymine (T-Hg 2+ -T) mismatches and aggregation of the released nanogold particles. After removing the aggregated particles by filtrate membrane, the excess NGssDNA in the filtration solution...
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