Issue 100, 2014
From the journal:

RSC Advances

Facile method to sort graphene quantum dots by size through ammonium sulfate addition†

Seongwoo Ryu,‡a   Kyueui Lee,‡a   Soon Hyung Hongbc  and  Haeshin Lee*ac  

* Corresponding authors

a Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Rd., Daejeon 305-701, Republic of Korea
E-mail: haeshin@kaist.ac.kr

b Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 University Rd., Daejeon 305-701, Republic of Korea

c Center for Nature-inspired Technology (CNiT) in KAIST Institute for NanoCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 University Rd., Daejeon 305-701, Republic of Korea

Abstract

We report a method to purify graphene quantum dots size simply by adding ammonium sulfate. The addition of a salt to a heterogeneous GQD suspension results into the sorting of GQD sub-populations with diameters corresponding to 2.7 ± 1.6, 5.1 ± 1.5, 13.3 ± 1.9, and 18.7 ± 4.4 nm. These GQDs also exhibit different optical properties.

Graphical abstract: Facile method to sort graphene quantum dots by size through ammonium sulfate addition

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Article information

DOI
https://doi.org/10.1039/C4RA07032A
Article type
Communication
Submitted
12 Jul 2014
Accepted
15 Oct 2014
First published
15 Oct 2014

RSC Adv., 2014,4, 56848-56852

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Facile method to sort graphene quantum dots by size through ammonium sulfate addition

S. Ryu, K. Lee, S. H. Hong and H. Lee, RSC Adv., 2014, 4, 56848 DOI: 10.1039/C4RA07032A

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