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Tailoring the Photoluminescence Excitation Dependence of the Carbon Dots via an Alkali Treatment
Yun Yang Zhao1; Song Nan Qu1; Xi Yuan Feng1; Jin Cheng Xu1; Ye Yang1; Shi Chen Su2; Shuang Peng Wang1; Kar Wei Ng1
2019-08-15
Source PublicationJournal of Physical Chemistry Letters
ISSN1948-7185
Volume10Issue:16Pages:4596-4602
Abstract

Carbon dots (CDs) have shown great potential in various applications including biomedicines and optoelectronics. However, the origin of their photoluminescence excitation dependence (PL-ED) still remains uncertain, and this can limit the full exploit of their wonderful optical properties. Here we studied the mechanism for the PL-ED of solvothermally synthesized CDs using an alkali treatment. As-synthesized CDs were found to agglomerate and exhibited multicolor emissions with strong PL-ED. The alkali treatment can effectively break down the clusters into individual CDs via the hydrolysis of the amide and ester bonds that link the CDs together. This process effectively narrowed the emission line width and suppressed the observed PL-ED. The understanding of the excitation dependence mechanism here outlined a novel strategy for tailoring of the PL-ED of CDs via a synergy of chemical and physical processes, thus enhancing the versatility of CDs for a broader spectrum of applications.

DOI10.1021/acs.jpclett.9b01848
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Materials Science ; Science & Technology - Other Topics ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000481568500016
Scopus ID2-s2.0-85070672278
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorShuang Peng Wang
Affiliation1.Joint Key Laboratory,Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Taipa,Avenida da Universidade,Macao
2.Institute of Optoelectronic Material and Technology,South China Normal University,Guangzhou,510631,China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Yun Yang Zhao,Song Nan Qu,Xi Yuan Feng,et al. Tailoring the Photoluminescence Excitation Dependence of the Carbon Dots via an Alkali Treatment[J]. Journal of Physical Chemistry Letters,2019,10(16):4596-4602.
APA Yun Yang Zhao,Song Nan Qu,Xi Yuan Feng,Jin Cheng Xu,Ye Yang,Shi Chen Su,Shuang Peng Wang,&Kar Wei Ng.(2019).Tailoring the Photoluminescence Excitation Dependence of the Carbon Dots via an Alkali Treatment.Journal of Physical Chemistry Letters,10(16),4596-4602.
MLA Yun Yang Zhao,et al."Tailoring the Photoluminescence Excitation Dependence of the Carbon Dots via an Alkali Treatment".Journal of Physical Chemistry Letters 10.16(2019):4596-4602.
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