Nucleobase chemosensor based on carbon nanodots

The Inherent Relationship between Carbon Nanodots and Carbon Source in the Determination of Metal Ions

“…The FL of the CDs almost stayed unchanged in the presence of Cu(II), indicating a time-independant mechanism. Therefore, a static quenching mechanism could account for the response behavior of the CDs to Cu(II) [41,42]. A non uorescent ground-state complex should be formed between the CDs and metal ions, which immediately returns to the ground-tate without emission of a photon after absorbing light.…”

Computer‐Aided Design and Analysis of Spectrally Aligned Hybrid Plasmonic Nanojunctions for SERS Detection of Nucleobases

“…CB7-Au@Ag NP hybrid plasmonic nanojunctions were then prepared and investigated experimentally. In a proof-of-concept application, SERS detection of nucleobases, which are biomarkers for diseases related to oxidative damage of DNA [17][18][19] and bacterial infection, [20][21][22] has been demonstrated by positioning them at the nanojunctions via novel host-guest complexation with CB7. Our scheme exhibits rapid response and a detection limit down to 10 −10 m in the case of spectrally aligned CB7-Au@Ag NPs, which show an enhancement factor (EF) up to ≈10 9 -10 10 , achieving the minimum required EF for singlemolecule detection.…”

Multifunctional cobalt metal–organic framework luminescent probe for the efficient sensing of Cr2O72−, MnO4− and nucleobases

“…15–20 However, all these methods have some common drawbacks, such as high cost, using complex systems, requiring specialist knowledge, and being time consuming. 21 Compared with the above-mentioned techniques, optical sensing methods, which are based on a change in the fluorescence intensity caused by an interaction between a sensor and an analyte, have attracted more attention because of their quick response times, ease of use, and real-time analytical capabilities. 22,23…”