Advancement in Photothermal Effect of Carbon Nanotubes by Grafting of Poly(amidoamine) and Deposition of CdS Nanocrystallites.
Advancement in Photothermal Effect of Carbon Nanotubes by Grafting of Poly(amidoamine) and Deposition of CdS Nanocrystallites.
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DOI：
10.1021/acs.iecr.7b04732
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发表时间：
2018-04
影响因子：
4.2
通讯作者：
G. Neelgund;A. Oki
中科院分区：
文献类型：
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作者：
G. Neelgund;A. Oki
通过将第四代聚酰胺-胺（PAMAM）共价接枝到碳纳米管（CNTs）上，并在CNTs上沉积硫化镉（CdS）纳米晶，设计了一种稳定的近红外（NIR）活性光热剂CNTs-PAMAM/G4-CdS。通过迈克尔加成的重复过程，将第一、二、三、四代PAMAM接枝到碳纳米管上，实现了碳纳米管光热效应的系统化进展。随后在第四代PAMAM接枝的CNT上沉积CdS纳米晶，进一步改善了CNT的光热效应（PTE）。用980 nm近红外激光照射，考察了CNTs-PAMAM/G4-CdS的光热效应。在PTE测量过程中，CNTs-PAMAM/G4-CdS达到的最高温度为64.1 °C，远远超过癌细胞的存活温度。CNTs-PAMAM/G4-CdS的光热转换效率估计为32%，这高于报道的流行的金和铜基光热剂的值。CNTs-PAMAM/G4-CdS复合材料除了具有良好的光热效应外，还具有良好的抗光漂白和抗光腐蚀性能。
A robust, near-infrared (NIR) active photothermal agent, CNTs-PAMAM/G4-CdS, is designed by covalent grafting of fourth generation poly(amidoamine) (PAMAM) to carbon nanotubes (CNTs) and successive deposition of cadmium sulfide (CdS) nanocrystallites. The systematic advancement in photothermal effect of CNTs was achieved by grafting of first, second, third, and fourth generation PAMAM through the repeated process of Michael's addition. The subsequent deposition of CdS nanocrystallites over fourth generation PAMAM grafted CNTs has further improved the photothermal effect (PTE) of CNTs. The photothermal effect of CNTs-PAMAM/G4-CdS was accessed by illuminating with 980 nm NIR laser. During measurement of PTE, maximum temperature attained by CNTs-PAMAM/G4-CdS was 64.1 °C which far exceeds the survival temperature of cancer cells. The photothermal conversion efficiency estimated for CNTs-PAMAM/G4-CdS was 32%, which is higher than the value reported for popular gold and copper based photothermal agents. Apart from its outstanding photothermal effect, CNTs-PAMAM/G4-CdS possessed excellence in both antiphoto-bleaching and antiphoto-corrosiveness.