This study is focused on the properties of the diamond lattice before and after implantation. The diamond lattices with nitrogen-vacancy centres have very exciting properties and they can be used in a plethora of applications from quantum sensing to biomarkers. Characteristic transmission, scattering and photoluminescence of diamond lattice with nitrogen-vacancy centres (NV-) were studied through different techniques at different temperatures. The luminescence of the synthesised diamonds was studied at a 532nm excitation wavelength and recorded in the range of 500-1100nm. Since its intensity decreases with decreasing the number of nitrogen-vacancy centres. Also, we analysed the luminescence depend on the functional groups attached to the diamond surface.
Raman spectroscopy studies provide interesting results about the phonon confinement effect, structure composition and homogeneity of the material and information about the functional groups attached above the diamond surface. Raman spectra depend on the structure, purity, sp3/sp2 ratio, crystal size and surface chemistry. With increasing sp3 carbon content the intensity of the diamond peak increases, while the D-band in the Raman spectra weakens. Also, we analysed the shifts in the energy and linewidth of the diamond peak in the Raman spectra.
The recent development of novel super-resolution imaging techniques coincides with the efforts to synthesize optically bright and stable biomarkers. In the future, we can use the differently doped nanodiamond fluorophores as biomarkers for sensing and bioimaging.
Sini Nanadath Shibu, Dzianis Saladukha, Kang An, and Tomasz J. Ochalski, "Photonic and phononic properties of the photoluminescent diamond lattice before and after implantation (Conference Presentation)," Proc. SPIE 10927, Photonic and Phononic Properties of Engineered Nanostructures IX, 109270Q (Presented at SPIE OPTO: February 05, 2019; Published: 8 March 2019); https://doi.org/10.1117/12.2510735.6011671815001.
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