Chapagain Puskar, Guisbiers Grégory, Kusper Matthew, Geoffrion Luke D, Benamara Mourad, Golden Alexander, Bachri Abdel, Hewavitharana Lionel
Department of Engineering and Physics, Southern Arkansas University, 100 E. University, Magnolia, Arkansas 71753, United States.
Department of Physics and Astronomy, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, Arkansas 72204, United States.
ACS Omega. 2021 Mar 1;6(10):6871-6880. doi: 10.1021/acsomega.0c06062. eCollection 2021 Mar 16.
Gold has always fascinated humans, occupying an important functional and symbolic role in civilization. In earlier times, gold was predominantly used in jewelry; today, this noble metal's surface properties are taken advantage of in catalysis and plasmonics. In this article, the plasmon resonance of gold dumbbell nanorods is investigated. This unusual morphology was obtained by a seed-mediated growth method. The concentration of chemical precursors such as cetyltrimethylammonium bromide and silver nitrate plays a significant role in controlling the shape of the nanorods. Indeed, the aspect ratio of dumbbell nanostructures was varied from 2.6 to 4. UV-visible absorption spectra revealed a shift of the longitudinal surface plasmon resonance peak from 669 to 789 nm. Having the plasmon resonance in the near infrared region helps to use those nanostructures as photothermal agents.
黄金一直吸引着人类，在文明中占据着重要的功能和象征角色。在早期，黄金主要用于珠宝制作；如今，这种贵金属的表面特性在催化和等离子体学中得到了利用。在本文中，对金哑铃形纳米棒的等离子体共振进行了研究。这种不寻常的形态是通过种子介导生长法获得的。十六烷基三甲基溴化铵和硝酸银等化学前驱体的浓度在控制纳米棒的形状方面起着重要作用。事实上，哑铃形纳米结构的纵横比从2.6变化到4。紫外可见吸收光谱显示纵向表面等离子体共振峰从669纳米移至789纳米。在近红外区域具有等离子体共振有助于将这些纳米结构用作光热剂。
