A wireless magnetoelastic sensor for uranyl using DNAzyme–graphene oxide and gold nanoparticles-based amplification

Precisely Determining Ultralow level UO22+ in Natural Water with Plasmonic Nanowire Interstice Sensor

“…However, these methods present several drawbacks in that they require expensive instruments, involve complicated methods, and are time-consuming. Recently, nanomaterial-based UO 2 2+ sensing methods have been developed by employing fluorescence 12 13 , electrochemistry 14 , resonance scattering 15 16 , colorimetry 17 , magnetoelasticity 18 , and surface-enhanced Raman scattering (SERS) 19 20 21 . Among these techniques, SERS offers highly sensitive molecular detection because SERS signals can be obtained from a small number of molecules or even a single molecule located within a sub-10 nm metallic nano-gap (hot spot) 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 .…”

Recent advances in electrochemical biosensing schemes using graphene and graphene-based nanocomposites

“…It is a formidable task to distinguish this important neurotransmitter from AA, and UA in biological samples. The presence of sp 2 -like planes and various edge defects on the graphene surface might attribute to a better sensing performance toward DA than single walled CNTs [89] and can differentiate DA from AA and serotonin, a monoamine neurotransmitter DNAzyme-AuNPs/GO/magnetoelastic ribbon 9.57-120 nM (2.87 nM) [420] * Octa(3-aminopropyl)octasilae quioxane octahydrochloride (OA-POSS); poly(sodium 4-styrenesulfonate) (PSS); cetyltrimethylammonium bromide (CTAB); poly(aniline-co-o-aminophenol)-Pd nanofiber (PANOA); poly(diallydimethylammonium chloride) (PDDA).…”

A turn-off fluorescent biosensor for the rapid and sensitive detection of uranyl ion based on molybdenum disulfide nanosheets and specific DNAzyme

“…As we mentioned previously, so far, several rapid methods including colorimetric sensors [8,9,22], fluorescent sensor [21] and magnetoelastic sensor [23] have been developed for detecting UO 2 2+ . In comparison with previous colorimetric sensors [8,9,22], the proposed biosensor has higher sensitivity, similar or more excellent selectivity and short analysis time.…”

“…Not long ago, a uranyl ion-specific DNAzyme was reported by Lu and his co-workers [20]. Encouraged by the discovery of uranyl ion-specific DNAzyme, some DNAzyme-based biosensors have been developed for the rapid and specific detection of UO 2 2+ [21][22][23]. For example, Lu and his co-workers have reported a catalytic beacon fluorescent biosensor for detecting UO 2 2+ by using uranyl ion-specific DNAzyme as recognition probe [21].…”