An Overview of Anodic Oxides Derived Advanced Nanocomposites Substrate for Surface Enhance Raman Spectroscopy

Abstract

Surface-enhanced Raman spectroscopy (SERS) is an analytical technique, which allows to identify traces of chemical or biological substances in many field, like pharmaceutical and food industries, homeland security, nanosensors, or environmental protection. The analytes are identified based on their vibrational spectra, unique for a given compound. The advantage of SERS is effective qualitative analysis of trace amounts of analyte, but the disadvantages are stability of substrate and repeatability of measurements. The challenge is to improve SERS substrates to minimize these drawbacks. Nowadays high-precision electron beam lithography or focused ion beam is used in SERS substrate fabrication, which is impractical for large-scale production. In recent years, researchers' attention has focused on porous anodic oxides, with inexpensive and scalable production method, as potential materials for SERS substrates. This chapter will discuss the progress of anodic oxides used as a SERS substrate, and the brief description of conventional SERS substrate fabrication methods will be presented.

Application of Anodic Titanium Oxide Modified with Silver Nanoparticles as a Substrate for Surface-Enhanced Raman Spectroscopy

“…Generally, the SERS substrates available commercially have uniform surface coverage and give significant SERS signal enhancement. On the other hand, the high cost of single substrate and expensive processing devices used in its fabrication processes (usually physical vapor deposition (PVD) or lithographic methods) are major problems that need to be solved to make SERS spectroscopy more accessible to a wider group of analysts [ 30 ]. Those conditions can be achieved by Ti anodizing, and that is why we present this approach.…”

Morphological and Optical Characterization of Colored Nanotubular Anodic Titanium Oxide Made in an Ethanol-Based Electrolyte

“…Generally, ATO is used in photocatalytic applications to achieve energy conservation and environment protection [21,22]. In addition, AAO and ATO can be used in many other applications, such as providing a substrate for surface-enhanced Raman spectroscopy [23,24], implants [25,26], or coloring metal surfaces [27,28].…”