A novel one-pot room-temperature synthesis route to produce very small photoluminescent silicon nanocrystals
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A novel strategy to synthesize photoluminescent silicon nanocrystals (SiNCs) from a reaction between tetraethylorthosilicate (TEOS) and trimethyl-hexadecyl-ammonium borohydride (CTABH4) in organic solvent is presented. The formation reaction occurs spontaneously at room temperature in homogeneous phase. The produced silicon nanocrystals are characterized by using their photoluminescent properties and via HRTEM. In addition, theoretical calculations of the optical absorption spectrum of silicon quantum dots in vacuum with different sizes and surface moieties were performed in order to compare with the experimental findings. The new chemical reaction is simple and can be implemented to produce silicon nanocrystal with regular laboratory materials by performing easy and safe procedures.
KeywordsSilicon quantum dots Photoluminescent silicon nanocrystals Synthesis Colloids
The authors acknowledge the financial support by Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) through grant PIP 112-201101-0092 and PIP 11220110100992 and wish to thank both SeCyT and FONDeCyT (PICT-2015-2191) for the funding received. Raman microscopy facilities were supported by Laboratorio de Nanoscopía y Nanofotónica LANN-SNM of MINCyT (PME 1544) at INFIQC-CONICET. EM work was supported by the National Institute on Minority Health and Health Disparities of the National Institutes of Health under Award Number G12MD007591. This work has used computational resources from CCAD (Universidad Nacional de Córdoba (http://ccad.unc.edu.ar)), in particular Mendieta Cluster, which is part of SNCAD-MinCyT, República Argentina. Oscar A. Douglas-Gallardo thanks Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) for his post-doctoral fellowship.
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Conflict of interest
The authors declare that they have no conflict of interest.
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