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Silicon Quantum Dots: From Synthesis to Bioapplications

  • Miruna Silvia Stan
  • Cornelia Sima
  • Anca DinischiotuEmail author
Chapter
Part of the Nanomedicine and Nanotoxicology book series (NANOMED)

Abstract

Silicon quantum dots (Si QDs) represent a special class of nanomaterials with distinctive properties, being used in different applications such as photovoltaics, optoelectronics devices, and biomedical ones. They have excellent luminescence at UV irradiation, tunable band gap, and resistance against photobleaching compared to standard dyes. Being less toxic in comparison with conventional metal-containing QDs, they received growing research interest in the last decade as a more biocompatible alternative to which displayed toxicological concerns. There are several physical and chemical methods for Si QDs synthesis, each of them involving advantages and disadvantages. In physical methods, the experimental setup is very simple and parameters can be adjusted from outside in order to obtain the desired size of nanoparticles. Chemical methods seem to be attractive due to the huge scale of productions, but the purity control of the material and experimental setup are more complicated. For biomedical applications, many techniques have been established to achieve water-soluble Si QDs and for their conjugation with biomolecules that render them to specific biological targets. Si QDs have become powerful nanomaterials in various biomedical applications, a promising approach for in vivo imaging, tumor biology investigation, and cancer treatment. Besides of all these advantages, their characteristics can also trigger cytotoxicity in healthy cells by different mechanisms that have been in vitro and in vivo investigated in the last years. This chapter summarizes the major methods of synthesis and recent advances in bioconjugation strategies for preparing high-quality Si QDs, with a focus on their toxicity evaluation and bioapplications.

Keywords

Silicon quantum dots Semiconductors Self-fluorescence Biocompatibility Biomedical applications 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2017

Authors and Affiliations

  • Miruna Silvia Stan
    • 1
  • Cornelia Sima
    • 2
  • Anca Dinischiotu
    • 1
    Email author
  1. 1.Department of Biochemistry and Molecular BiologyUniversity of BucharestBucharestRomania
  2. 2.Laser DepartmentNational Institute of Laser, Plasma and Radiation PhysicsBucharest, MagureleRomania

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