Yoon Young-Jin, Kang Shin-Hyun, Kim Tae-Hwan
Department of Applied Plasma & Quantum Beam Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea.
Research Center for Advanced Nuclear Interdisciplinary Technology, Jeonbuk National University, Jeonju 54896, Republic of Korea.
J Phys Chem Lett. 2021 Dec 16;12(49):11960-11967. doi: 10.1021/acs.jpclett.1c03268. Epub 2021 Dec 9.
Self-assembly of nanoparticles (NPs) into highly ordered structure can enhance their electronic and optical properties that provide great potential applications such as nanoelectronics and nanophotonics. However, the self-assembly of NPs upon external stimuli was still mainly continuous and irreversible, making various potential applications of NPs difficult. Herein, the self-assembled superlattices of gold nanoparticles (AuNPs) with a temperature-selective response had been investigated by using the amphiphilic block copolymer as a template. The AuNPs in the block copolymer template, which has the closed looplike phase behavior upon heating, self-assembled into the highly ordered body centered cubic (BCC) or face centered cubic (FCC) structures at a specific temperature region that means a temperature-selective responsiveness. The formation of highly ordered self-assembled superlattices (BCC or FCC symmetries) of AuNPs with the closed looplike phase behavior was controlled by the additive and temperature. This study is the first demonstration for temperature-selective response of the cooperative self-assembly of AuNPs in the block copolymer template.
纳米粒子（NPs）自组装成高度有序的结构可以增强其电子和光学性质，这为纳米电子学和纳米光子学等潜在应用提供了巨大潜力。然而，纳米粒子在外部刺激下的自组装仍然主要是连续且不可逆的，这使得纳米粒子的各种潜在应用变得困难。在此，通过使用两亲性嵌段共聚物作为模板，研究了具有温度选择性响应的金纳米粒子（AuNPs）自组装超晶格。在加热时具有闭环状相行为的嵌段共聚物模板中的AuNPs，在特定温度区域自组装成高度有序的体心立方（BCC）或面心立方（FCC）结构，这意味着具有温度选择性响应。具有闭环状相行为的AuNPs高度有序自组装超晶格（BCC或FCC对称性）的形成受添加剂和温度控制。本研究首次证明了在嵌段共聚物模板中AuNPs协同自组装的温度选择性响应。
