Controlling the emissive pathways of carbon nanoparticles by selective surface functionalization

Farsi, Basim Al; Sofin, R. G. S.; El-Shafey, E.I.; Issac, Abey; Marzouqi, Faisal Al; Mashaikhi, Said Al; Myint, Myo Tay Zar; Abou‐Zied, Osama K.

doi:10.1016/j.apsusc.2021.150618

Cited by 4 publications

(1 citation statement)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More endeavors are extremely desirable to explore tailoring of newfangled QD size carbon nanomaterials from greener horizon. Moreover, it has been reported that photoluminescence is an important feature of CDs determining their optical sensing properties and introduction of heteroatom/functional groups can also tune their FL performance [19] . It is also well documented that sensitivity of metal‐ion is one of the popular properties of CDs.…”

Section: Introductionmentioning

confidence: 99%

Realizing High Performance Tunable Sensing Mode and Selectivity of Metal Ions Based on Carbon Dot

Devi,

Singh

et al. 2024

ChemNanoMat

View full text Add to dashboard Cite

We have adopted a straightforward, eco‐friendly and economically profitable pyrolysis route of tailoring quantum dot size carbon particles (CD) from the leaves of Arundo donax. The synthesized uniformly dispersed CD1 and CD2 have an average diameter of 4.5 nm and 3.5 nm respectively as determined via HRTEM. FT‐IR analysis corroborated nitric acid treatment leads to rich surface functionalization of CD2. Experimentally estimated average fluorescence (FL) lifetime of the as‐prepared CD1 and CD2 are 2.31 ns and 3.87 ns respectively. Juxtapose to other metal ions, Cd+2 ions can efficiently quench FL of CD1, while Cr+6 ions, on contrary, prominently enhanced FL of CD2. Benefitting from their FL response, a turn off sensor was built using CD1 to detect Cd+2 ions and a turn on‐off sensor by CD2 to sense Cr+6 with impressive limit of detections of 2.58 nM and 1.73 nM respectively. They exhibit superior performance compare to other documented nanoscopic materials. The FL “turn off” interaction mechanism of CD1 was attributed mainly to static quenching. While that of “turn on‐off” mechanism for CD2 was ascribed to chelation enhanced fluorescence phenomenon and a rare partial combination of inner filter effect plus dominate dynamic type of quenching.

show abstract

Section: Introductionmentioning

confidence: 99%