Anisotropic Thermal Processing of Polymer Nanocomposites via the Photothermal Effect of Gold Nanorods
Anisotropic Thermal Processing of Polymer Nanocomposites via the Photothermal Effect of Gold Nanorods
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DOI：
10.1002/ppsc.201200084
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发表时间：
2013-02-01
影响因子：
2.7
通讯作者：
Clarke, Laura I.
中科院分区：
文献类型：
--
作者：
Maity, Somsubhra;Kozek, Krystian A.;Clarke, Laura I.
通过将金属纳米颗粒嵌入聚合物材料内，可以经由用与纳米颗粒表面等离子体共振共振的光照射来实现选择性热聚合物处理，这是由于纳米颗粒的光热效应，其有效地将光转化为热。来自嵌入的金纳米棒的光热加热的波长和偏振灵敏度用于选择性地处理聚合物纳米纤维的集合，完全熔化沿着选定方向放置的那些纤维，同时使剩余材料基本上不加热且不受影响。采用基于双折射的温度和粘度感测来确认所选纤维中加热和熔融的存在以及其在反向排列纤维中的不存在。在处理样品的子集而其余部分不变时的这种可调特异性不能通过常规加热技术容易地实现。
By embedding metal nanoparticles within polymeric materials, selective thermal polymer processing can be accomplished via irradiation with light resonant with the nanoparticle surface plasmon resonance due to the photothermal effect of the nanoparticles which efficiently transforms light into heat. The wavelength and polarization sensitivity of photothermal heating from embedded gold nanorods is used to selectively process a collection of polymeric nanofibers, completely melting those fibers lying along a chosen direction while leaving the remaining material largely unheated and unaffected. Fluorescence-based temperature and viscosity sensing was employed to confirm the presence of heating and melting in selected fibers and its absence in counter-aligned fibers. Such tunable specificity in processing a subset of a sample, while the remainder is unchanged, cannot easily be achieved through conventional heating techniques.