Photoluminescent organosilane-functionalized carbon dots as temperature probes

Chen, Po‐Cheng; Chen, Ya-Na; Hsu, Pai-Hui; Shih, Chung-Chien; Chang, Huan‐Tsung

doi:10.1039/c3cc38486a

Cited by 147 publications

(99 citation statements)

References 40 publications

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“…The enhanced non-radiative recombination is possibly the main factor for the PL thermal quenching due to the activation of non-radiative recombination centers with temperature increasing. [33][34][35][36] The PL peak of starch/g-CD phosphors shows a red shift of ∼100 eV from 90 to 370 K, which is generally attributed to stronger electron-phonon interaction as the temperature increases (Fig. 4b).…”

Section: Resultsmentioning

confidence: 97%

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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: 97%

“…The temperature-dependent PL not only provides unique insight into the understanding of the PL mechanisms of QDs, 33 but also offers the potential for the application in temperature sensors. 34 The temperature-dependent PL spectra of the starch/g-CD phosphors (mass ratio: 70 : 1) from 90 to 370 K were recorded as shown in Fig. 4a.…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2014

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“…For the characterization of Cdots, XPS has generally been used for the assessment of the elemental composition and the chemical bonds of C-dots in combination with IR. Doping of C-dots with nonmetallic heteroatoms such as N [43,49,56,99,114,121,122,134], S [14,24,46,49,87], Si [50,127,140,141], P [39,49,93], and B [114,142] has been characterized by XPS. A typical example of XPS analysis employed to estimate the surface states and chemical composition of nitrogen and sulfur-codoped C-dots (SNCNs) was displayed in Figure 6 [46].…”

Section: X-ray Photoelectronmentioning

confidence: 99%

“…In the case of IR analysis of C-dots samples, apart from the evaluation of hydroxyl (-OH) and carbonyl (C=O) functional groups on the C-dots surface [41,49,69,127], IR is also able to examine the doping of heteroatoms into the C-dots framework. Important examples include the identification of the presence of amide/amine (-CN/NH 2 ) [15,20,21,[37][38][39][40][41][42][43][44][45][46], alkyl sulfide (C-S) [33,[46][47][48][49], organosiloxane (Si-OSi/Si-O-C) [89,127,140,141], phosphates (P=O and P-O-R) [38,49,93], and boronic acid (B-O and B-N) [114,142,143] moieties attached on the surface of C-dots, providing evidence for introduction of nitrogen (N), sulfur (S), silicon (Si), phosphorus (P), and boron (B) heteroatoms into Cdots. The merits of this technique for the characterization of surface functionalization of C-dots are being low cost, simple, rapid, and easy for sample preparation.…”

Section: Infrared Spectroscopymentioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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Carbon nanodots (C-dots) are recently discovered fluorescent carbon nanoparticles with typical sizes of <10 nm. The C-dots have been reported to have excellent photophysical and chemical characteristics. In recent years, the advances in the development and improvement in C-dots synthesis, characterization, and applications are burgeoning. In this review, we introduce the most commonly used techniques for the characterization of C-dots. The characterization techniques for C-dots are briefly classified, described, and illustrated with applied examples. In addition, the analytical separation methods for C-dots (including electrophoresis, chromatography, density gradient centrifugation, differential centrifugation, solvent extraction, and dialysis) are included and discussed according to their analytical characteristics. The review concludes with an outlook towards the future developments in the characterization and the analytical separation of C-dots. The comprehensive overview of the characterization and the analytical separation techniques will safeguard people to use each technique more wisely.

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“…Chen et al [25] reported a detection method using organosilane-functionalized CDs as temperature probes at 293-343 K. SiC-dot solutions and films both exhibited rapid temperature-dependent PL responses. The temperature induced PL quenching mechanism is related to the temperature enhanced population of nonradiative channels of surface (trap/defect) states [101].…”

Section: Other Detectionsmentioning

confidence: 99%

Controllable Synthesis of Fluorescent Carbon Dots and Their Detection Application as Nanoprobes

et al. 2013

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Abstract:Carbon dots (CDs), as a new member of carbon nanomaterial family, have aroused great interest since their discovery in 2004. Because of their outstanding water solubility, high sensitivity and selectivity to target analytes, low toxicity, favorable biocompatibility, and excellent photostability, researchers from diverse disciplines have come together to further develop the fundamental properties of CDs. Many methods for the production of CDs have been reported, therein, hydrothermal and solvothermal technology needs simple equipments, and microwave synthesis needs less reaction time, hence these methods become current common synthesis methods, in which many precursors have been applied to produce CDs. Due to their excellent fluorescence, CDs have made impressive strides in sensitivity and selectivity to a diverse array of salt ions, organic/biological molecules and target gases. The development of CDs as nanoprobes is still in its infancy, but continued progress may lead to their integration into environmental and biological applications. Hydrothermal, solvothermal, and microwave synthesis of fluorescent carbon dots and their detection applications as nanoprobes in salt ions, organic/biological molecules, and target gases will be reviewed.

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Photoluminescent organosilane-functionalized carbon dots as temperature probes

Cited by 147 publications

References 40 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

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Controllable Synthesis of Fluorescent Carbon Dots and Their Detection Application as Nanoprobes

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