Nanosecond Pulsed Laser Heated Nanocrystals Inside A Metal Organic Framework Matrix
Nanosecond Pulsed Laser Heated Nanocrystals Inside A Metal Organic Framework Matrix
复制标题
纳秒脉冲激光加热金属有机框架基质内的纳米晶体
DOI：
10.1002/cnma.202200169
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发表时间：
2022
期刊：
影响因子：
3.8
通讯作者：
D. Dorfs
中科院分区：
文献类型：
--
作者：
M. Niemeyer;P. Bessel;P. Rusch;R. Himstedt;D. Kranz;H. Borg;N. C. Bigall;D. Dorfs
研究了用纳秒激光脉冲等离子体激元加热封装在金属有机框架（ZIF-8）基质中的金和金氧化锌纳米晶体。辐照Au@ZIF-8复合颗粒导致金芯加热和周围基质分解，充当温度探针。在辐照后的TEM图像上发现ZIF-8基质内的空腔。它们的尺寸取决于激光能量密度和在吸收激光脉冲后在金芯处产生的热量。金芯的周围可以在高达60 nm的距离内加热至ZIF-8分解。 这代表了一种在三维中可视化从金芯到ZIF-8基质的热传递的方法。对ZIF-8封装的Au@ZnO点棒颗粒的研究深入了解了颗粒组分之间的热传递，并显示了该方法对不同、更复杂系统的适用性。
Investigations on gold and gold‐zinc oxide nanocrystals encapsulated in a matrix of a metal‐organic framework (ZIF‐8) upon plasmonic heating with nanosecond laser pulses are presented. Irradiation of Au@ZIF‐8 composite particles leads to heating of the gold core and decomposition of surrounding matrix acting as temperature probe. Cavities inside the ZIF‐8 matrix are found on TEM images after irradiation. Their size is determined dependent on laser energy density and the generated heat at the gold core after absorption of a laser pulse approximated. The surrounding of the gold cores can be heated up to ZIF‐8 decomposition over a distance up to 60 nm. This represents a method to visualize heat transfer from the gold cores to the ZIF‐8 matrix in three dimensions. Studies on ZIF‐8 encapsulated Au@ZnO dot‐rod particles give insight in heat transfer between the particle components and show the applicability of the method to different, more complex systems.