Photothermal effects of gold nanorods in aqueous solution and gel media: Influence of particle size and excitation wavelength.
Photothermal effects of gold nanorods in aqueous solution and gel media: Influence of particle size and excitation wavelength.
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DOI：
10.1049/nbt2.12110
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发表时间：
2023-04
影响因子：
2.3
通讯作者：
中科院分区：
文献类型：
--
作者：
金纳米棒（GNRs）已经成为癌症治疗和癌症治疗中最有效的光热剂。了解周围介质、颗粒大小和激发波长的影响对于优化光热转换率至关重要。在这里，研究了三对大小不同纵横比的金纳米棒及其在水溶液和凝胶状介质中在表面和离表面等离子体共振波长下的激光辐射下的热生成。在水溶液中，在共振激发下，大的金纳米棒的温度升高大于小的金纳米棒。与大的金纳米棒（LGNRs）相比，小的金纳米棒（SGNRs）对激发波长的敏感性较低。在非共振激发下，SGNR的温升大于LGNR的温升。在琼脂糖凝胶中，SGNR的光热效应大于在其溶液相纵向表面等离子体共振波长附近的波长处激发的LGNR。LGNRs在凝胶中的温度升高明显小于在水溶液中的温度升高。这些发现表明，SGNR可能比LGNR更有益于生物系统中的光热应用，并在选择GNR时提供了进一步的见解。研究了溶液和凝胶介质中不同长径比的大小金纳米棒在表面等离子体共振波长和离表面等离子体共振波长下的光热效应。与大的金纳米棒相比，小的金纳米棒对激发波长不太敏感。当金纳米棒将介质从水改变为凝胶时，这导致凝胶介质中的小金纳米棒的更增强的热生成，因为表面等离子体共振波长偏移。
Gold nanorods (GNRs) have emerged as the most efficient photothermal agent in cancer therapy and photocatalysis. Understanding the influence of the surrounding medium, particle size, and excitation wavelength is critical to optimising the photothermal conversion rate. Here, three pairs of large and small gold nanorods of different aspect ratios and their heat generation under laser radiation at on and off surface plasmon resonance wavelengths in aqueous solution and gel‐like media are investigated. In the aqueous solution, the temperature rise of the large gold nanorods is more than with small gold nanorods at resonance excitation. In contrast to the large gold nanorods (LGNRs), the small gold nanorods (SGNRs) were less sensitive to excitation wavelength. At off‐resonance excitation, the temperature rise of the SGNRs is larger than that of the LGNRs. In the agarose gel, the photothermal effect of the SGNRs is greater than LGNRs excited at the wavelength near their solution phase longitudinal surface plasmon resonance wavelength. The temperature increase of LGNRs in gel is significantly less than in aqueous solution. These findings suggest that SGNRs could be more beneficial than the LGNRs for photothermal applications in biological systems and provides further insight when selecting GNRs. Photothermal effect of large and small gold nanorods of different aspect ratios have been investigated at on and off surface plasmon resonance wavelengths in solution and gel media. In contrast to large gold nanorods, small gold nanorods were less sensitive to the excitation wavelength. This leads to more enhanced heat generation of small gold nanorods in gel media as surface plasmon resonance wavelength shifts when gold nanorods change media from water to gel.
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影响因子：
3.9
作者：
Jia, Henglei;Fang, Caihong;Wang, Jianfang
通讯作者：
Wang, Jianfang
影响因子：
3.1
作者：
Awan UA;Raza A;Ali S;Saeed RF;Akhtar N
通讯作者：
Akhtar N
影响因子：
1.2
作者：
Lee, Pei Yun;Costumbrado, John;Kim, Yong Hoon
通讯作者：
Kim, Yong Hoon
影响因子：
11.2
作者：
Manivasagan, Panchanathan;Hoang, Giang;Oh, Junghwan
通讯作者：
Oh, Junghwan
影响因子：
16.6
作者：
Latreille, Pierre-Luc;Adibnia, Vahid;Banquyf, Xavier
通讯作者：
Banquyf, Xavier