Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation

Enshan Liu; Tao Liang; Elena V. Ushakova; Bingzhe Wang; Bohan Zhang; Huiqun Zhou; Guichuan Xing; Chunming Wang; Zikang Tang; Songnan Qu; Andrey L. Rogach

doi:10.1021/acs.jpclett.0c03383

Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation

Enshan Liu, Tao Liang, Elena V. Ushakova, Bingzhe Wang, Bohan Zhang, Huiqun Zhou, Guichuan Xing, Chunming Wang, Zikang Tang^*, Songnan Qu^*, Andrey L. Rogach

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

40 Citations (Scopus)

Abstract

Carbon dots (CDs) with efficient excitation and emission in deep-red/near-infrared (NIR) spectral range are important for bioimaging applications. Herein, we develop a simple and effective method to significantly enhance both the absorption and emission of CDs in deep-red/NIR by suppressing nonradiative charge recombination via deprotonation of the CD surface. As compared to aqueous solutions at room temperature, NIR emission of CDs in N,N-dimethylformamide and glycerol experience a 50- and 70-fold increase at -20 °C, respectively, due to enhanced deprotonation ability and viscosity. On the basis of the adjustable NIR fluorescence intensity of CDs, multilevel data encryption in the NIR region is realized by controlling the humidity and the temperature of a CD-ink stamped paper.

Original language	English
Pages (from-to)	604-611
Journal	Journal of Physical Chemistry Letters
Volume	12
Issue number	1
Online published	31 Dec 2020
DOIs	https://doi.org/10.1021/acs.jpclett.0c03383
Publication status	Published - 14 Jan 2021

Access Output

10.1021/acs.jpclett.0c03383

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{98cb6945d8614b878cb9ac1b80162849,

title = "Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation",

abstract = "Carbon dots (CDs) with efficient excitation and emission in deep-red/near-infrared (NIR) spectral range are important for bioimaging applications. Herein, we develop a simple and effective method to significantly enhance both the absorption and emission of CDs in deep-red/NIR by suppressing nonradiative charge recombination via deprotonation of the CD surface. As compared to aqueous solutions at room temperature, NIR emission of CDs in N,N-dimethylformamide and glycerol experience a 50- and 70-fold increase at -20 °C, respectively, due to enhanced deprotonation ability and viscosity. On the basis of the adjustable NIR fluorescence intensity of CDs, multilevel data encryption in the NIR region is realized by controlling the humidity and the temperature of a CD-ink stamped paper.",

author = "Enshan Liu and Tao Liang and Ushakova, {Elena V.} and Bingzhe Wang and Bohan Zhang and Huiqun Zhou and Guichuan Xing and Chunming Wang and Zikang Tang and Songnan Qu and Rogach, {Andrey L.}",

year = "2021",

month = jan,

day = "14",

doi = "10.1021/acs.jpclett.0c03383",

language = "English",

volume = "12",

pages = "604--611",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "American Chemical Society",

number = "1",

}

TY - JOUR

T1 - Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation

AU - Liu, Enshan

AU - Liang, Tao

AU - Ushakova, Elena V.

AU - Wang, Bingzhe

AU - Zhang, Bohan

AU - Zhou, Huiqun

AU - Xing, Guichuan

AU - Wang, Chunming

AU - Tang, Zikang

AU - Qu, Songnan

AU - Rogach, Andrey L.

PY - 2021/1/14

Y1 - 2021/1/14

N2 - Carbon dots (CDs) with efficient excitation and emission in deep-red/near-infrared (NIR) spectral range are important for bioimaging applications. Herein, we develop a simple and effective method to significantly enhance both the absorption and emission of CDs in deep-red/NIR by suppressing nonradiative charge recombination via deprotonation of the CD surface. As compared to aqueous solutions at room temperature, NIR emission of CDs in N,N-dimethylformamide and glycerol experience a 50- and 70-fold increase at -20 °C, respectively, due to enhanced deprotonation ability and viscosity. On the basis of the adjustable NIR fluorescence intensity of CDs, multilevel data encryption in the NIR region is realized by controlling the humidity and the temperature of a CD-ink stamped paper.

AB - Carbon dots (CDs) with efficient excitation and emission in deep-red/near-infrared (NIR) spectral range are important for bioimaging applications. Herein, we develop a simple and effective method to significantly enhance both the absorption and emission of CDs in deep-red/NIR by suppressing nonradiative charge recombination via deprotonation of the CD surface. As compared to aqueous solutions at room temperature, NIR emission of CDs in N,N-dimethylformamide and glycerol experience a 50- and 70-fold increase at -20 °C, respectively, due to enhanced deprotonation ability and viscosity. On the basis of the adjustable NIR fluorescence intensity of CDs, multilevel data encryption in the NIR region is realized by controlling the humidity and the temperature of a CD-ink stamped paper.

UR - http://www.scopus.com/inward/record.url?scp=85100070105&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85100070105&origin=recordpage

U2 - 10.1021/acs.jpclett.0c03383

DO - 10.1021/acs.jpclett.0c03383

M3 - RGC 21 - Publication in refereed journal

C2 - 33382631

SN - 1948-7185

VL - 12

SP - 604

EP - 611

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 1

ER -

Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation

Abstract

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

GRF: Anisotropic Carbon Nanorods with Polarized Emission for Two-Photon Fluorescence Bioimaging

Cite this

Enhanced Near-Infrared Emission from Carbon Dots by Surface Deprotonation

Abstract

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Anisotropic Carbon Nanorods with Polarized Emission for Two-Photon Fluorescence Bioimaging

Cite this