… We report colorimetric, label-free, and non-aggregation-based gold nanoparticle (AuNP) …
the leaching of gold at room temperature in the presence of thiourea species and hydrochloric …

… alginate powder by thiourea, 6.0 g thiourea was firstly dissolved in 200.0 mL of 5% sodium
hydroxide, 15.0 mL ECH was then added to the thiourea solution. The mixture was heated in …

… reported for detecting thiourea based on the leaching of thiourea to gold nanoparticles (Au …
notably decreased by the appearance of thiourea in the mixture. A linear relationship exists …

… nanoparticles (Au nano ) mixed with carbon nanotubes (CNTs) is presented. The sensor is
fabricated by casting a thin layer from CNT-Au nano -TU mixture … Gold nanoparticles increase …

… in several seconds, indicating the formation of gold nanoparticles. The obtained wine red
solution … For the mixture of fluorescein and thiourea, the spectrum and yellow-green color under …

… HCl, thiourea and the mixture of HCl and thiourea under at … for effective and selective
adsorption of gold(III), palladium(II) … coating thiourea onto the surface of magnetite nanoparticles (…

… Synthesis of gold colloidal solution … Heating and stirring under reflux were carried out for
another 15 min, during which time the color of the mixture changed from pale yellow to wine red. …

… Aqueous dispersions of Au nanoparticles (or mixture of Au nanoparticles and thiourea) were
diluted by a factor of 10 with distilled water and then dropped onto a carbon-coated copper …

… The eluent is a mixture of thiourea, hydrochloric acid and H 2 O 2 . The elemental gold
can be oxidized and dissolved in acidic thiourea medium and H 2 O 2 acts as an oxidant to …

… Enlightened by these facts, we consider that when Cr 3+ was added to the mixture of citrate
and thiourea, a synergistic complex will be formed among them as shown in Fig. 1a. This …