Selenium reduction pathways in the colloidal synthesis of CdSe nanoplatelets

• DOI: 10.1039/d3nr05157a
• Publication Date: 2024-02-22T09:04:38Z
• Authors: Alessio Di Giacomo; Alina Myslovska; Vic De Roo; Jan Goeman; José C. Martins; Iwan Moreels
• Keywords: PHOSPHINE-FREE SYNTHESIS; PRECURSORS; Chemistry; Physics and Astronomy; THRESHOLD STIMULATED-EMISSION; SEMICONDUCTOR NANOCRYSTALS; 02 engineering and technology; QUANTUM DOTS; 0210 nano-technology; GROWTH-KINETICS; SE

Several established procedures are now available to prepare zinc blende CdSe nanoplatelets. While these protocols allow for detailed control over both thickness and lateral dimensions, the chemistry behind their formation is yet be unraveled. In this work, we discuss influence of solvent on synthesis We confirmed that presence double bonds, as case 1-octadecene, plays a key role in evolution nanoplatelets, through isomerization alkene, by nuclear magnetic resonance spectroscopy mass spectrometry. Consequently, 1-octadecene can replaced (or mixture), however, only one also contains α protons CC bonds. confirm via nanoplatelets hexadecane spiked with small amount aromatic 1,2,3,4-tetrahydronaphthalene (tetralin). At same time, chemical reaction leading occurs some extent saturated solvents. A closer examination revealed an alternative pathway possible, interaction carboxylic acids, such octanoic acid, selenium. Next shedding more light fundamental understanding precursor paves way use optimized admixtures additional handle nanoplatelet synthesis, well reduce potential self-polymerization hurdles observed 1-octadecene.