A reversible fluorescence nanoswitch based on bifunctional reduced graphene oxide: use for detection of Hg2+ and molecular logic gate operation

Abstract

Herein, we demonstrate the first use of a reduced graphene oxide (rGO)-organic dye nanoswitch for the label-free, sensitive and selective detection of Hg(2+) using bifunctional rGO as an effective nanoquencher and highly selective nanosorbent. Moreover, a reversible on-off INHIBIT rGO logic gate based on a cysteine-Hg(2+) system has also been designed.

A facile one step electrostatically driven electrocodeposition of polyviologen–reduced graphene oxide nanocomposite films for enhanced electrochromic performance

“…The fluorescence intensity of PV decreased in presence of rGO. This might be due to the electrostatic interaction between photochemically produced PV Å+ and negatively charged rGO which result in fluorescence quenching with stepwise addition of rGO [39,40]. These results proves that as-formed PV-rGO nanocomposites is highly stabilized by strong electrostatic and p-p stacking interactions between PV 2+ and rGO as well as well-established viologen cation-p electron (rGO) interactions [41] (Fig.…”

Synthesis, characterization and optical properties of in situ ZnFe2O4 functionalized rGO nano hybrids through modified solvothermal approach

“…This high optical band gap is due to the high chemical composition of rGO in overall hybrid sample. The high band gap is attributed to the large defect concentration (Section 3.2) in wet reduction of GO and restacking of graphite sheets during thermal annealing of hybrid sample [51][52][53][54][55].…”

Fluorescent/luminescent detection of natural amino acids by organometallic systems

“…Schematic illustration of Cys detection based on reduced graphene oxide (rGO)-53-Hg 2+ ensemble[84].…”