Fabrication of Patterned Ag and Au Inverse Opal Structures Through Repeated Self-Assembly of Fine Particles

Abstract

This study aims to apply the self-assembly process of particles to the fabrication of inverse opal structures, which improve the fabrication of catalysts and sensors. The process consists of two dip-coating steps. The first one is the production of sacrificial silica particles 1 or 2 µm in diameter. The second one is the fabrication of silver or gold nano-particles. After these processes, silica particles are dissolved to create the inverse opal structure. We demonstrate how changing the diameter of the sacrificial particle varies the size of the pores. Finally, we present how the patterned Ag and Au inverse opal structure can be created using the hydrophobic/hydrophilic patterned substrate.

Fabrication of high aspect ratio silicon micro-/nano-pore arrays and surface modification aiming at long lifetime liquid-infused-type self-cleaning function

“…Table 2 shows the experimental conditions for the surface modification. In this work, OTS concentration of 3 wt% was chosen and the dipping time was changed from 20 min to find suitable conditions based on our previous studies (Kanamori et al, 2008, Nishio et al, 2014. A high AR nanopore structure was used to estimate effect of the dipping time.…”

“…Figure 2 shows a schematic of a fabrication procedure. First, silica particles were self-assembled on a silicon substrate using dip coating method to produce a monolayer (Kanamori et al, 2008, Nishio et al, 2014, Moronuki et al, 2016b. A gold layer was then deposited using physical vapor deposition (PVD), originally used for scanning electron microscope (SEM) observation coating.…”

Metallo-Dielectric Colloidal Films as SERS Substrate

“…Consequently, the incorporation of metal nanoparticles (NPs) into colloidal crystals is a subject of study that emerges naturally [7]. Some of the methods to achieve the incorporation of the NPs are based on self-assembling, electroplating process, and photolysis [8][9][10]. The applications of these composite thin films cover catalysis, optical devices, solar cell, and sensors [11][12][13][14][15], among others.…”

Water Repellency Control of Oxygen-Free Copper Surface by Diamond-Cut Micro Grooves

“…Many previous studies have been conducted on increasing water repellency by modifying a solid surface. A typical method for improving water repellency is surface coating with water-repellent materials [1][2][3]. However, surface coatings have disadvantages, such as low strength and low durability.…”