Abstract
Fluorescent quantum dots (QDs) are potential candidates for bio-imaging but major problems in using them for bio-imaging applications are either bandgaplyinginUVregionorthecytotoxicity of the visible light-excited cadmium-based QDs. Keeping these things in mind, glutathione (GLT) functionalised Mn-doped ZnS QDs has been studied to make a desired fluorescent system for bioimaging application. XRD measurements show that grain size decreases at higher concentration of GLT capping on Mn-doped quantum dots. UV–visible studies show that the band gap shows a blue shift at higher GLT concentration. FTIR studies confirm GLT functionalisation on thesurfaceofZnSQDs.BothUVexcitedandIRexcited photoluminescence spectrum of samples exhibited a tunable orange emission intensity with increase in GLT concentration however multiphoton infrared excited spectra was used to show the feasibility of GLT functionalised ZnS: Mn quantum dots for a real application in a biological window of 650–950 nm.
Original language | English |
---|---|
Pages (from-to) | 321-328 |
Number of pages | 8 |
Journal | Advances in Applied Ceramics |
Volume | 118 |
Issue number | 6 |
DOIs | |
State | Published - 2019 |
Keywords
- Biological window
- Glutathione
- Photoluminescence
- Quantum dots
- ZnS:Mn