Formation of carbon quantum dots and nanodiamonds in laser ablation of a carbon film

We have experimentally shown that nanosecond near-IR pulsed laser ablation of a thin amorphous carbon film produces carbon quantum dots with a graphite structure and nanodiamonds with a characteristic size of 20 ? 500 nm on the substrate surface. The formation of these nanostructures is confirmed by electron microscopic images, luminescence spectra and Raman spectra. The mechanisms explaining the observed effects are proposed.

[1]  B. Rezek,et al.  Photoluminescence of nanodiamonds influenced by charge transfer from silicon and metal substrates , 2016 .

[2]  Christian P. Fergusson,et al.  Kinetically driven graphite-like to diamond-like carbon transformation in low temperature laminar diffusion flames , 2017 .

[3]  A. Bulgakov,et al.  PHOTONICS AND NANOTECHNOLOGY Pulsed laser ablation of binary semiconductors: mechanisms of vaporisation and cluster formation , 2010 .

[4]  K. Ostrikov,et al.  Fast, energy-efficient synthesis of luminescent carbon quantum dots , 2014 .

[5]  J. L. Hueso,et al.  Nitrogen-doped luminescent carbon nanodots for optimal photo-generation of hydroxyl radicals and visible-light expanded photo-catalysis , 2016 .

[6]  Bai Yang,et al.  Highly photoluminescent carbon dots for multicolor patterning, sensors, and bioimaging. , 2013, Angewandte Chemie.

[7]  D. Bäuerle.  Laser Processing and Chemistry , 1996 .

[8]  J. L. Hueso,et al.  Feroxyhyte nanoflakes coupled to up-converting carbon nanodots: a highly active, magnetically recoverable, Fenton-like photocatalyst in the visible-NIR range. , 2015, Chemical communications.

[9]  V. Russo,et al.  Nanocrystalline diamond produced by direct current micro-plasma: Investigation of growth dynamics , 2017 .

[10]  N. Ade,et al.  The dose rate dependence of synthetic diamond detectors in the relative dosimetry of high-energy electron therapy beams , 2014 .

[11]  R Svensson,et al.  Design and characterization of a tissue-equivalent CVD-diamond detector for clinical dosimetry in high-energy photon beams. , 2008, Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics.

[12]  Christoph F Schmidt,et al.  Super-Resolution Optical Fluctuation Bio-Imaging with Dual-Color Carbon Nanodots. , 2016, Nano letters.

[13]  V. Golubev,et al.  Photoluminescence of carbon dots from mesoporous silica , 2016 .