Emission of double core infrared (CdSeTe)/ZnS quantum dots conjugated to antibodies

Commercially available double core CdSeTe/ZnS quantum dots (QDs) with emission at 800 nm (1.60 eV) have been studied by photoluminescence (PL) and Raman scattering methods in non-conjugated states and after the conjugation to the anti-Interleukin 10 (IL-10) antibodies. The PL energy shift, stimulated by the electric charge of antibodies, has been detected in PL spectra of bioconjugated QDs. All optical measurements are performed on the dried droplets of the original solution of non-conjugated and bio-conjugated QDs located on the Si substrate. Raman scattering spectra are studied with the aim to reveal the CdSeTe core compositions, as well as to design the QD energy diagrams in non-conjugated and bio-conjugated states, and to detect the elastic strains at the QD bioconjugation.