Boron Based Quantum Dots and their Applications in Energy Transfer Processes through Biomolecules


Budak E., Aykut S., Ünlü C.

15th Nanoscience and Nanotechnology Conference, Antalya, Turkey, 3 - 06 November 2019, pp.64

  • Publication Type: Conference Paper / Summary Text
  • City: Antalya
  • Country: Turkey
  • Page Numbers: pp.64
  • Istanbul Technical University Affiliated: Yes

Abstract

Quantum Dots(QDs) are semiconductor nanocrystals with size smaller than 5 nm which have become a significant material in biomedicine, optics and electronics very recently. Most of the quantum dots consist of cadmium, however, it is crucial to develop cadmium free QDs for biomedical applications since cadmium is a highly toxic element. Boron Nitride (BN) QDs are one of the newest members in QD field and become popular in biomedical application due to their low toxicity and biocompatibility. However, until now BN QDs are synthesized at high temperature and high pressure conditions. In this study, a novel quantum dot type containing Boron, Nitrogen and Carbon elements were synthesized at ambient conditions through a microwave based bottom-up method. Composition of QDs were controlled by tuning mass ratio of boron precursor and nitrogen precursor. Boron doped carbon nitride, carbon doped boron nitride and boron carbon nitride QDs with size around 2 nm were synthesized with high quantum efficiency. Emission wavelength of QDs were controlled by changing mass ratio of boron and nitrogen precursors, in other words by controlling composition of QDs. Also, boron based QDs were mixed with photosynthetic pigments to check energy transfer between QDs and biomolecules. Mixing photosynthetic pigments with QDs resulted in enhancement of fluorescence of photosynthetic pigments at 670 nm which demonstrates that boron based QDs can be an important constituent of artificial antenna systems for photosynthetic organisms.