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首页> 外文会议>NATO Advanced Study Institute on Nano-Optics: Principles Enabling Basic Research and Applications >Organization of Metallic Nanoparticles in Block Copolymer Ultra-Thin Films for Optical Devices
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Organization of Metallic Nanoparticles in Block Copolymer Ultra-Thin Films for Optical Devices

机译：用于嵌段共聚物的金属纳米粒子的组织用于光学装置的嵌段共聚物超薄膜

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Metallic nanoparticles (NPs) with sub-wavelength dimensions can interact with light because of the collective oscillation of conduction band electrons. This phenomenon, the so-called localized surface plasmon resonance (LSPR), offers significant promise for optical applications such as biosensors. Importantly, the LSPR is a function of several parameters, such as the size and shape of the particles. Moreover, the plasmonic properties of NPs assemblies differ from those of isolated particles because of interparticle coupling. Block copolymer Langmuir-Blodgett films have been investigated as templates for the organization of NPs. Lemineur JF, Saci N, Ritcey AM, Colloids Surf A. 498:88-97, 2016. Different kinds of self-assembled structures have been observed including isolated particles, clusters, rings and strands (Fig. 34.1). With this approach, the size, the shape and the periodicity of the domains used for assemblies can be systematically tuned. In addition, the particle diameter was also modifiable via an in situ seeded growth procedure. The optical properties of the resulting assemblies are currently under investigation and theoretical calculations (based on the discrete dipole approximation) were carried out to guide the interpretation of experimental results. Finally, the monolayers were evaluated as potential substrates for SERS and as bio-sensors.
机译：由于传导带电子的集体振荡，具有子波长尺寸的金属纳米颗粒（NPS）可以与光相互作用。这种现象，所谓的局部表面等离子体谐振（LSPR），对诸如生物传感器的光学应用提供了重要的承诺。重要的是，LSPR是几个参数的函数，例如粒子的尺寸和形状。此外，由于颗粒偶联，NPS组件的等离子体特性与隔离颗粒的等离子体特性不同。已经研究了嵌段共聚物Langmuir-Blodgett薄膜作为组织NPS的模板。 Lemineur JF，Saci N，Rityy Am，胶体冲浪A. 498：88-97,2016。已经观察到不同种类的自组装结构，包括分离的粒子，簇，环和股线（图34.1）。利用这种方法，可以系统地调整用于组件的域的大小，形状和周期性。此外，通过原位种子生长程序也可改变粒径。所得组件的光学性质目前正在研究，并进行理论计算（基于离散偶极近似），以指导实验结果的解释。最后，单层被评估为SERS和作为生物传感器的潜在基材。

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