Influence of Morphological Homogeneity of Superspherical Gold Nanoparticles on Plasmonic Photothermal Heat Generation

被引：9
|
作者：
Bae, Ji Yong [1 ]
Jung, Dae-Woong [1 ,2 ]
Jeong, Chan Bae [1 ]
Kim, Hong-Seung [1 ]
Kim, Jung Dae [1 ]
Ro, Hyun-Joo [1 ,3 ,4 ]
Jun, Sangmi [1 ,3 ,4 ]
Kim, Dong Uk [1 ]
Kim, Jun Min [1 ,2 ]
Yi, Gi-Ra [2 ]
Lee, Gaehang [1 ]
Chang, Ki Soo [1 ]
机构：
[1] Korea Basic Sci Inst, Div Sci Instrumentat, Daejeon 34133, South Korea
[2] Sungkyunkwan Univ, Dept Chem Engn, Suwon 16419, South Korea
[3] Korea Res Inst Chem Technol, Convergent Res Ctr Emerging Virus Infect, Daejeon 34114, South Korea
[4] Univ Sci & Technol, Bioanalyt Sci, Daejeon 34113, South Korea
来源：
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION | 2019年 / 36卷 / 07期
基金：
新加坡国家研究基金会;
关键词：
morphological homogeneity; plasmonic photothermal properties; superspherical gold nanoparticles; ULTRA-SMOOTH; CONVERSION; THERAPY; SIZE; ENHANCEMENT; NANOSPHERES; EFFICIENCY; RESONANCE; NANORODS;
D O I：
10.1002/ppsc.201900131
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The plasmonic photothermal (PPT) characteristics of gold nanostructures have been extensively investigated theoretically and experimentally due to their potential for use materials science and industry. The management of the size and shape of gold nanoparticles has been a key issue in the development of better solutions for PPT heat generation because their size and shape determine their resultant photothermal properties. However, the light absorption of gold nanostructures is mainly dependent on the wavelength and orientation of the incident light; hence, maintaining uniform size and shape is critical for achieving maximum photothermal energy. Morphologically homogeneous spherical gold nanoparticles, or super gold nanospheres prepared by slowly etching uniform octahedral gold nanoparticles, demonstrate better PPT heat generation compared with commercially available nonsmooth gold nanoparticles (GNSs). The PPT heating experiments show a maximum temperature difference of 5.7 degrees C between the super and ordinary GNSs with the same average maximum Feret's diameters, which result from the more efficient PPT heat power generation (20.6%) of the super GNSs. In an electromagnetic-wave simulation, the super GNSs show lower polarization dependence and a 24.6% higher absorption cross-section than ordinary GNSs.
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页数：9
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