Ando Jun, Kato Aki, Fukuda Takashi, Emoto Akira
Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara-miyakodani, Kyotanabe, Kyoto 610-0321, Japan.
Sensing System Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
ACS Omega. 2020 Feb 11;5(7):3513-3521. doi: 10.1021/acsomega.9b03811. eCollection 2020 Feb 25.
In our previous study, we developed an array of unique porous structures (an array of barnacle-like porous structures) to apply to biosensing chips. The porous structure was formed by an internal swelling phenomenon of a polystyrene colloidal particle monolayer, which was surrounded by a poly(vinyl alcohol) layer, for the duration of the monolayer's immersion in a toluene bath. Barnacle-like porous structures were formed when polystyrene particles that had rapidly swelled broke the outer layer around the top of the particles. However, after the surface was coated with a thin Ag layer, the porous structure showed a relatively broad extinction spectrum that was undesirable for sensing chips based on both surface plasmon extinction and grating coupling. In this paper, we propose an approach to obtain relatively sharp extinction spectra based on the decimation of the spatial frequencies of the porous structures. This study also investigates formation properties in more detail to control the structural features of the resultant porous structures. A relatively sharp peak in the extinction spectrum was ultimately obtained.
在我们之前的研究中，我们开发了一系列独特的多孔结构（一系列藤壶状多孔结构）以应用于生物传感芯片。多孔结构是由聚苯乙烯胶体颗粒单层的内部溶胀现象形成的，该单层被聚乙烯醇层包围，在单层浸入甲苯浴期间形成。当快速溶胀的聚苯乙烯颗粒打破颗粒顶部周围的外层时，形成了藤壶状多孔结构。然而，在表面涂覆薄银层后，多孔结构显示出相对较宽的消光光谱，这对于基于表面等离子体消光和光栅耦合的传感芯片来说是不理想的。在本文中，我们提出了一种基于多孔结构空间频率抽取来获得相对尖锐消光光谱的方法。本研究还更详细地研究了形成特性，以控制所得多孔结构的结构特征。最终获得了消光光谱中相对尖锐的峰。
