A Biocompatible Fluorescent Ink Based on Water‐Soluble Luminescent Carbon Nanodots

Qu, Songnan; Wang, Xiaoyun; Lu, Qipeng; Liu, Xingyuan; Wang, Lijun

doi:10.1002/anie.201206791

Cited by 1,093 publications

(668 citation statements)

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“…21 The PL was significantly quenched when the g-CDs were deposited on glass, metal, or plastic substrates due to the formation of aggregates. 11 The g-CDs contain a lot of carboxyl and amide groups on the surfaces as demonstrated in our previous work, 11,21 which can be effectively adsorbed on starch particles through hydrogen bonding. The formation mechanism of the starch/g-CD phosphors is schematically illustrated in Fig.…”

Section: Resultsmentioning

confidence: 93%

Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites

et al. 2014

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Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites Sun, M.; Qu, S.; Hao, Z.; Ji, W.; Jing, P.; Zhang, H.; Zhang, L.; Zhao, J.; Shen, D. Published in: Nanoscale DOI:10.1039/c4nr04034aLink to publication Citation for published version (APA):Sun, M., Qu, S., Hao, Z., Ji, W., Jing, P., Zhang, H., ... Shen, D. (2014). Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites. Nanoscale, 6(21), 13076-13081. DOI: 10.1039/c4nr04034a General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. A new type of environmentally friendly phosphor based on carbon nanodots (CDs) has been developed through the dispersion of CDs by integrating the CDs with starch particles. The starch particles contain large numbers of hydroxyl groups around the surfaces, which can effectively absorb the CDs, whose surfaces are functionalized by lots of carboxyl and amide groups, through hydrogen bonding. Effective dispersion of CDs on the surfaces of starch particles can suppress the non-radiative decay processes and photoluminescence (PL) quenching induced by aggregation of CDs. The starch matrix neither competes for absorbing excitation light nor absorbs the emissions of CDs, which leads to efficient PL emitting. As a result, the starch/CD phosphors with a quantum yield of ∼50% were obtained. The starch/CD phosphors show great potential in phosphor-based light emitting diodes, temperature sensors, and patterning.

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Section: Resultsmentioning

confidence: 93%

Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites

et al. 2014

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“…12,29 The CDs-V have a specific intrinsic absorption band in the visible region ranging from 400 to 500 nm (Fig. 1a).…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Especially, CDs, owing to their superior performance in terms of water solubility, stability, toxicity, resistance to photobleaching, and biocompatibility, have recently drawn significant attention. [9][10][11][12][13][14][15] The electron injection from CDs to TiO 2 was demonstrated to be feasible and the CD-sensitized TiO 2 photoelectrodes have been applied in photocatalysis and PVs. 10,[16][17][18][19][20][21] However, it is still a challenge to achieve efficient electron injection from CDs to TiO 2 under sunlight, 21 which is a primary photophysical process in generating photocurrent in CD-based PVs.…”

Section: Introductionmentioning

confidence: 99%

“…24,25 The surface defects are unstable and dissipative in energy, which are unfavorable for efficient electron injection in PVs. 23,[26][27][28] In addition, the reported CDs are generally passivated with insulating long chain molecules, 10,12,29 which act as tunneling barriers and are against efficient electron injection and well performing CD-based optoelectronic devices. 22,30 To realize efficient CD-sensitized TiO 2 PVs under sunlight, the CDs should exhibit intrinsic absorption in the visible region and be integrated effectively with TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Previously, we prepared non-long-chain-molecule-functionlized CDs with a strong and specific absorption band in the visible region (CDs-V) extending to 500 nm, which exhibited superior photostability compared with organic dyes. 12,29,31,32 Amplified spontaneous green emission and lasing were achieved from the CDs-V. 29 Green photoluminescence (PL) was proposed to be intrinsic state emission and the visible absorption was from intrinsic absorption rather than from surface defect states. 29 In this work, we demonstrated that the CDs-V could be integrated with TiO 2 with the absorption band extending to the visible region.…”

Section: Introductionmentioning

confidence: 99%

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Towards efficient photoinduced charge separation in carbon nanodots and TiO₂ composites in the visible region

Sun

et al. 2015

Phys. Chem. Chem. Phys.

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Towards efficient photoinduced charge separation in carbon nanodots and TiO2 composites in the visible region Sun, M.; Qu, S.; Ji, W.; Jing, P.; Li, D.; Qin, L.; Cao, J.; Zhang, H.; Zhao, J.; Shen, D. General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. In this work, photoinduced charge separation behaviors in non-long-chain-molecule-functionalized carbon nanodots (CDs) with visible intrinsic absorption (CDs-V) and TiO 2 composites were investigated. Efficient photoinduced electron injection from CDs-V to TiO 2 with a rate of 8.8 Â 10 8 s À1 and efficiency of 91% was achieved in the CDs-V/TiO 2 composites. The CDs-V/TiO 2 composites exhibited excellent photocatalytic activity under visible light irradiation, superior to pure TiO 2 and the CDs with the main absorption band in the ultraviolet region and TiO 2 composites, which indicated that visible photoinduced electrons and holes in such CDs-V/TiO 2 composites could be effectively separated. The incident photon-to-current conversion efficiency (IPCE) results for the CD-sensitized TiO 2 solar cells also agreed with efficient photoinduced charge separation between CDs-V and the TiO 2 electrode in the visible range. These results demonstrate that non-long-chainmolecule-functionlized CDs with a visible intrinsic absorption band could be appropriate candidates for photosensitizers and offer a new possibility for the development of a well performing CD-based photovoltaic system.

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Recent Advances in Carbon Dots for Bioanalysis and the Future Perspectives

Fong

2018

Carbon Nanomaterials for Bioimaging, Bioanalysis, and Therapy

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A Biocompatible Fluorescent Ink Based on Water‐Soluble Luminescent Carbon Nanodots

Cited by 1,093 publications

References 54 publications

Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites

Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites

Towards efficient photoinduced charge separation in carbon nanodots and TiO₂ composites in the visible region

Recent Advances in Carbon Dots for Bioanalysis and the Future Perspectives

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