Influence of carbon nanotubes and graphene nanosheets on photothermal effect of hydroxyapatite

Neelgund, Gururaj M.; Oki, Aderemi

doi:10.1016/j.jcis.2016.07.078

Cited by 46 publications

(36 citation statements)

References 81 publications

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“…The apoptosis rate of group with CNPs was a bit higher than that of groups with CNs (P < 0.05). The results indicated that the CNPs had the excellent photothermal therapeutic effect in vitro , similar to other similar materials33233.…”

Section: Resultssupporting

confidence: 54%

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Phase-Transition Nanodroplets for Real-Time Photoacoustic/Ultrasound Dual-Modality Imaging and Photothermal Therapy of Sentinel Lymph Node in Breast Cancer

Cheng

Chen

et al. 2017

Sci Rep

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Pathological status of lymph nodes (LNs) plays a critical role in staging and treatment for the patients with breast cancer. Sentinel lymph node biopsy has become the standard method in determining pathological status of axillary LNs. Therefore, the determination of sentinel lymph nodes (SLNs) and therapy of metastatic LNs are highly desirable in clinic. Herein, an unprecedented carbon nanoparticles (CNs)-incorporated liquid-gas phase-transition nanodroplets (CNPs) with strong near-infrared (NIR) absorption, good biocompatibility, excellent photoacoustic (PA) and ultrasound (US) contrast, and high photothermal-conversion efficiency are reported in this study. Upon laser irradiation, liquid-gas phase transition of the CNPs has been demonstrated to provide excellent contrasts for PA/US dual-modality imaging both in vitro and in vivo. Additionally, the CNPs are capable of staining lymph nodes, which can contribute significantly to the identification of LNs with naked eyes. With increased laser energy, the CNPs exhibit the high performance in killing the breast cancer cells both in vitro and in vivo, due to the photothermal effect induced from the CNs within CNPs. These results suggest that the developed multifunctional phase-transition nanodroplets have high potential to act as the theranostic agents in both SLNs detection and therapy of metastatic LNs.

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Section: Resultssupporting

confidence: 54%

“…Moreover, the CNPs have photothermal-conversion effect after exposure to laser. Photothermal therapy is highly effective in oncotherapy43233. In this study, we have shown that CNPs has the therapeutic effect on the tumor, as demonstrated both in vitro and in vivo .…”

mentioning

confidence: 68%

Phase-Transition Nanodroplets for Real-Time Photoacoustic/Ultrasound Dual-Modality Imaging and Photothermal Therapy of Sentinel Lymph Node in Breast Cancer

Cheng

Chen

et al. 2017

Sci Rep

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“…In a very recently study, Neelgund et al (Neelgund and Oki, 2016 ) found that CNT could improve the photothermal efficiency (PTE) of HAP, and HAP could also overcome the poor dispersion of CNT. In this work, we proposed the combination of HAP with CNT for fluoride removal from aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Defluoridation Capacity From Aqueous Media via Hydroxyapatite Decorated With Carbon Nanotube

Tang

Duan

et al. 2018

Front. Chem.

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In this work, the potential of a novel hydroxyapatite decorated with carbon nanotube composite (CNT-HAP) for fluoride removal was investigated. The synthesized CNT-HAP composite was systematically characterized by X-ray diffraction(XRD), Fourier Transform infrared spectroscopy(FTIR), scanning electron microscope (SEM) and Brunauer–Emmett–Teller(BET). Batch adsorption experiments were conducted to investigate the defluorination capacity of CNT-HAP. The CNT-HAP composite has a maximum adsorption capacity of 11.05 mg·g−1 for fluoride, and the isothermal adsorption data were fitted by the Freundlich model to calculate the thermodynamic parameters. Thermodynamic analysis implies that the adsorption of fluoride on CNT-HAP is a spontaneous process. Furthermore, the adsorption of fluoride follows pseudo-second-order model. The effects of solution pH, co-existing anions and reaction temperature on defluorination efficiency were examined to optimize the operation conditions for fluoride adsorption. It is found that the optimized pH-value for fluoride removal by CNT-HAP composite is 6. In addition, among five common anions studied in this work, the presence of HCO3- and PO43- could considerably affect the fluoride removal by CNT-HPA in aqueous media. Finally, the underlying mechanism for the fluoride removal by CNT-HAP is analyzed, and an anion exchange process is proposed.

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“…The spectrum of CNTs‐PLA‐Pd (Figure d) could not demonstrate any individual band corresponding to both CNTs‐PLA and Pd nanoparticles, instead, these bands have merged and appeared as a single band at 274 nm. Moreover, these samples have showed a strong absorption in NIR region between 950–1080 nm, which could be originated by the electronic transitions between the first or second van Hove singularities of the CNTs . The absorption of CNTs‐COOH in NIR region is significantly improved by grafting with PLA and further enhanced by deposition of Pd nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

“…The total rise in temperature of 43.5, 42.0 and 40.7 °C was recorded at 1, 0.5 and 0.25 mg/mL of concentration, respectively for CNTs‐PLA‐Pd . For further quantification of PTE of CNTs‐PLA‐Pd, its photothermal conversion efficiency (η) was calculated by the help of Roper's method using following equation

true η = \frac{h S (() T_{m a x} - T_{s u r r}) - Q_{d i s}}{I (1 - 10^{- A_{980}})}

…”

Section: Resultsmentioning

confidence: 99%

Contribution of Polylactic Acid and Pd Nanoparticles in the Enhanced Photothermal Effect of Carbon Nanotubes

Neelgund

Oki

2020

ChemistrySelect

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The carbon nanotubes (CNTs) have been successfully modified to absorb in near‐infrared (NIR) region by synergetic functionalization with an important biopolymer, polylactic acid (PLA) and subsequent in‐situ deposition of Pd nanoparticles. This process has also extended the absorption ability of Pd nanoparticles towards NIR region apart from its classical absorption in UV and visible regions. Thus fabricated CNTs‐PLA‐Pd demonstrated excellent photothermal effect under exposure to 980 nm laser and significant stability against photo‐bleaching and corrosiveness. A stepwise increment in the photothermal effect of CNTs was attained by covalent grafting of PLA and successive deposition of Pd nanoparticles. The photothermal effect of CNTs‐PLA‐Pd was proportional to its concentration level and photothermal conversion efficiency calculated for CNTs‐PLA‐Pd was 26.5 %. The photothermal effect of CNTs‐PLA‐Pd under illumination to 980 nm laser was higher than that of 808 nm laser. The temperature attained during photothermal effect for CNTs‐PLA‐Pd was beyond 60 °C, which far exceeds the temperature survival level of cancer cells. Overall, the rational integration of CNTs, PLA and Pd nanoparticles in CNTs‐PLA‐Pd by reported strategy could offer a suitable avenue for advancement of cancer therapy.

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Influence of carbon nanotubes and graphene nanosheets on photothermal effect of hydroxyapatite

Cited by 46 publications

References 81 publications

Phase-Transition Nanodroplets for Real-Time Photoacoustic/Ultrasound Dual-Modality Imaging and Photothermal Therapy of Sentinel Lymph Node in Breast Cancer

Phase-Transition Nanodroplets for Real-Time Photoacoustic/Ultrasound Dual-Modality Imaging and Photothermal Therapy of Sentinel Lymph Node in Breast Cancer

Enhanced Defluoridation Capacity From Aqueous Media via Hydroxyapatite Decorated With Carbon Nanotube

Contribution of Polylactic Acid and Pd Nanoparticles in the Enhanced Photothermal Effect of Carbon Nanotubes

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