Sustainable quantum dot chemistry: effects of precursor, solvent, and surface chemistry on the synthesis of Zn3P2 nanocrystals

The quest of exploring alternative materials for the replacement of toxic cadmium- and lead-based quantum dots (QDs) is necessary for envisaging a sustainable future but remains highly challenging. Tackling this issue, we present the synthesis of Zn3P2 nanocrystals (NCs) of unprecedented quality. New, reactive zinc precursors yield highly crystalline, colloidally stable particles, exhibiting oxide-free surfaces, size tunability and outstanding optical properties relative to previous reports of zinc phosphide QDs.

Pitch-based carbon/nano-silicon composite, an efficient anode for Li-ion batteries

Composites are prepared by simple mixture of laser pyrolysed silicon nanoparticles and petroleum pitch, a low cost carbon source. Helped by a homogeneous dispersion of Si nanoparticles into the pitch matrix high stability over cycling is observed.