Enriched graphitic N dopants of carbon dots as F cores mediate photothermal conversion in the NIR-II window with high efficiency

Geng, Bijiang; Shen, Wenwen; Fang, Fuling; Qin, Hua; Li, Ping; Wang, Xulong; Li, Xiaokai; Pan, Dengyu; Shen, Longxiang

doi:10.1016/j.carbon.2020.02.053

Cited by 87 publications

(74 citation statements)

References 67 publications

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“…It is worth noting that, although some reported NIR‐II PTAs showed a high PCE, they usually displayed a large particle size (above 25 nm) or tailed absorption in the NIR‐II region due to their insufficient absorption. [ 5a,26 ] Such high PCE of Ni‐CDs should be attributed to the formation of coordination complex between Ni and CDs, which enhances the electron delivery efficiency. [ 27 ]…”

Section: Resultsmentioning

confidence: 99%

Renal‐Clearable Nickel‐Doped Carbon Dots with Boosted Photothermal Conversion Efficiency for Multimodal Imaging‐Guided Cancer Therapy in the Second Near‐Infrared Biowindow

Tian

Liu

Feng

et al. 2021

Adv Funct Materials

141

108

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Photothermal agents with absorption in the second near‐infrared (NIR‐II) biowindow have attracted increasing attention for photothermal therapy (PTT) on account of their deeper tissue penetration capacity. However, most of the current NIR‐II photothermal agents exhibit low photothermal conversion efficiency (PCE) and long‐term biotoxicity. To overcome these shortcomings, herein, nickel and nitrogen co‐doped carbon dots (Ni‐CDs, ≈4.6 nm) are prepared via a facile one‐pot hydrothermal approach for imaging‐guided PTT in the NIR‐II window. The Ni‐CDs exhibit significant absorption in the NIR‐II region with a distinguished PCE as high as 76.1% (1064 nm) and have excellent photostability and biocompatibility. Furthermore, the Ni‐CDs can be employed as photothermal, photoacoustic, and magnetic resonance imaging contrast agents because of their outstanding photothermal effect and instinctive paramagnetic feature. The Ni‐CDs demonstrate significant PTT efficacy of tumor upon 1064 nm irradiation with a low power density (0.5 W cm−2). The Ni‐CDs can be eliminated from the body via a renal filtration pathway, thereby minimizing their long‐term biotoxicity. Therefore, this work provides a simple and feasible approach to develop photothermal agents with remarkable PCE in the NIR‐II region, presenting good biosafety for multimodal imaging‐guided PTT of tumor.

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Section: Resultsmentioning

confidence: 99%

Renal‐Clearable Nickel‐Doped Carbon Dots with Boosted Photothermal Conversion Efficiency for Multimodal Imaging‐Guided Cancer Therapy in the Second Near‐Infrared Biowindow

Tian

Liu

Feng

et al. 2021

Adv Funct Materials

141

108

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“…showed that the introduction of graphitic nitrogen in C‐dots leads to absorption in the NIR‐II range (808 and 1064 nm) as shown in Figure 2c. [ 46 ] As a result, the photothermal conversion efficiency of 81.3% was achieved in the NIR‐II window with a graphitic nitrogen content of 4.30%. Mechanistic studies to find the origin of NIR‐II absorption in these CD are represented in Figure 2d–f.…”

Section: Role Of C‐dots In Photodegradationmentioning

confidence: 99%

Carbon Dots for Photocatalytic Degradation of Aqueous Pollutants: Recent Advancements

Akbar

Moretti

Vomiero

2021

Advanced Optical Materials

119

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The immense progress of humanity on the technological, domestic, and industrial fronts comes at the cost of polluting the planet. Aquatic pollution is particularly dangerous since all life forms are directly linked to it. Each year tons of industrial and domestic pollutants make their way into aqueous systems. Efficient removal/degradation of these pollutants is of prime importance for the sustainable future. Among many technologies, photodegradation is an emerging and promising method for the successful removal of aqueous pollutants since it is powered by abundant solar light. The last decade had shown that carbon dots are among the most promising materials that can be utilized as an efficient tool to derive various solar‐driven chemical reactions. Carbon dots possess unique photophysical and chemical properties such as light‐harvesting over a broad‐spectrum region, upconversion photoluminescence, photosensitizers, chemical inertness, and bivalent redox character, etc. The ease of synthesis of carbon dots at low cost also contributes hugely to their utilizations as an efficient photocatalyst for the degradation of aqueous pollutants. This review summarizes the recent progress made in the field of photodegradation of aqueous pollutants with the aid of carbon dots and their hybrids, highlighting the critical role carbon dots can play in the field.

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“…Enriched graphitic N doped carbon dots (NIR–II–CDs) showed an ultrahigh photothermal conversion efficiency of 81.3% when the graphitic N doping level was 4.3%. The carbon dots can rapidly increase the tumor temperature from 35.8 to 48.6°C within 5 min upon the 1,064 nm laser irradiation, in addition, it also can work as drug carrier and release the chemotherapeutics under NIR- II laser to facilitate the comprehensive curative effect ( Geng et al, 2020 ). Other carbon nanomaterials such as carbon dots (CDs), carbon nanotubes, Graphene quantum dots (GQDs), carbon fiber, carbon nano-onion clusters and carbon-based nanocomposite like degradable carbon−silica nanocomposite (CSN) with high photothermal conversion efficiency were developed for cancer photothermal treatment, and exhibited promising prospect of carbon materials in NIR-based PTT ( Thakur et al, 2017 ; Geng et al, 2018 ; Gong et al, 2018 ; Permatasari et al, 2018 ; Li et al, 2019b ; Lu et al, 2019 ; Sun et al, 2019b ; Wang et al, 2020b ).…”

Section: Nir-ii Absorbing Materialsmentioning

confidence: 99%

Recent Progress on NIR-II Photothermal Therapy

Zhang

et al. 2021

Front. Chem.

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Photothermal therapy is a very promising treatment method in the field of cancer therapy. The photothermal nanomaterials in near-infrared region (NIR-I, 750-900 nm) attracts extensive attention in recent years because of the good biological penetration of NIR light. However, the penetration depth is still not enough for solid tumors due to high tissue scattering. The light in the second near-infrared region (NIR-II, 1000-1700 nm) allows deeper tissue penetration, higher upper limit of radiation and greater tissue tolerance than that in the NIR-I, and it shows greater application potential in photothermal conversion. This review summarizes the photothermal properties of Au nanomaterials, two-dimensional materials, metal oxide sulfides and polymers in the NIR-II and their application prospects in photothermal therapy. It will arouse the interest of scientists in the field of cancer treatment as well as nanomedicine.

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Enriched graphitic N dopants of carbon dots as F cores mediate photothermal conversion in the NIR-II window with high efficiency

Cited by 87 publications

References 67 publications

Renal‐Clearable Nickel‐Doped Carbon Dots with Boosted Photothermal Conversion Efficiency for Multimodal Imaging‐Guided Cancer Therapy in the Second Near‐Infrared Biowindow

Renal‐Clearable Nickel‐Doped Carbon Dots with Boosted Photothermal Conversion Efficiency for Multimodal Imaging‐Guided Cancer Therapy in the Second Near‐Infrared Biowindow

Carbon Dots for Photocatalytic Degradation of Aqueous Pollutants: Recent Advancements

Recent Progress on NIR-II Photothermal Therapy

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