Colorimetric detection of Cs⁺ based on the nonmorphological transition mechanism of gold nanoparticles in the presence of Prussian blue

Abstract

A colorimetric method for the detection of Cs+ using Au NPs and Prussian blue based on a nonmorphological transition mechanism.

Affinity driven ion exchange EG-OFET sensor for high selectivity and low limit of detection of cesium in seawater

“…It was indeed shown that with a molecular area of the cesium probe 1 of 120 Ų, i.e. a maximum surface density of ~5-8 ×10 13 probes/cm², and assuming a hexagonal close packing of the DCOH lipids, a DCOH-R:1 ratio of 5:1 is estimated [34]. Also, during the grafting process, the siloxane polymerization step leaves behind some unreacted groups or functions that are also pH sensitive.…”

“…Optical detection induced by cesium complexation appears to be one of the most favorite strategies [11,12]. A set of devices based on colorimetric detection using gold nanoparticles and Prussian blue [13], chrysoidine G as chemo indicator [14] or an optode based on ion-exchange membrane [15] allow naked eyes detection at the micromolar level. Fluorescence detection using squaraine fluorophore resulted in a significant lowering of the limit of detection down to 130 nM [16].…”

A Highly Sensitive and Selective Optical Sensor for the On-Line Detection of Cesium in Water

“…Consequently, the development of portable devices has become highly appealing in terms of cost-effectiveness and ease of use. Promising approaches involve leveraging techniques such as electrochemistry [ 10 ], colorimetric detection utilizing functionalized gold nanoparticles and Prussian blue [ 11 ], on-chip microplasma [ 12 ], and field-effect transistors (EG-FET) [ 13 ]. Notably, a recent study has demonstrated the utilization of fluorescent CsPbBr3 perovskite immobilized in an ionic liquid membrane for low-cost sensing purposes [ 14 ].…”