Boron-doped carbon nanoparticles: Size-independent color tunability from red to blue and bioimaging applications

Hari Krishna Sadhanala, Karuna Kar Nanda

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Here, we report the hydrothermal synthesis of boron-doped CNPs (B-CNPs) with different size/atomic percentage of doping and size-independent color tunability from red to blue. The variation of size/atomic percentage of B is achieved by simply varying the reaction time, while the color tunability is obtained by diluting the solution. With dilution, the luminescence spectra are not only blue-shifted, the intensity increases as well. The huge blue-shift in the emission energy (∼1 eV) is believed to be due to the increase in the interparticle distance. The quantum yield with optimum dilution is found to increase with boron doping though it is very low as compared to CNPs and nitrogen-doped CNPs. Finally, we show that B-CNPs with a quantum yield of 0.5% can be used for bioimaging applications.

Original languageEnglish
Pages (from-to)166-173
Number of pages8
JournalCarbon
Volume96
DOIs
StatePublished - Jan 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Funding

The authors acknowledge Department of Science and Technology (DST) ( 1046 ) for the financial support and IISc for 200 kV FETEM facility. The authors also acknowledge the help of Siva Krishna Narra for bioimaging experiments in their Laboratory.

FundersFunder number
Indian Institute of Science
Department of Science and Technology, Ministry of Science and Technology, India1046

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