Influence of One-Dimensional Photonic Crystal on Raman Signal Enhancement: A Detailed Experimental Study.

The enhancement of Raman signals using photonic crystal structures has been the subject of numerous experimental and theoretical studies, leading to a variety of issues and inconsistencies. This paper presents a comprehensive experimental investigation into the impact of alignment between the laser excitation wavelength and the specific position of the photonic band gap on signal enhancement in Raman spectroscopy. By employing one-dimensional (1D) porous silicon photonic crystals, a systematic analysis across a large number of spectra was conducted.

Solid-State Dispersions of Platinum in the SnO and FeO Nanomaterials.

The dispersion of platinum (Pt) on metal oxide supports is important for catalytic and gas sensing applications. In this work, we used mechanochemical dispersion and compatible Fe(II) acetate, Sn(II) acetate and Pt(II) acetylacetonate powders to better disperse Pt in FeO and SnO. The dispersion of platinum in SnO is significantly different from the dispersion of Pt over FeO.

Vibrational dynamics of 1,3-propanediol in liquid, polycrystalline and glassy states: A Raman spectroscopic study.

Vibrational transitions of 1,3-propanediol in liquid and crystal phases are assigned on the basis of Raman and infrared spectra of liquid and low temperature (295K-10K) Raman spectra which are presented here for the first time. In the crystal, there are four molecules per unit cell, each having a gGGg' conformation. The vibrations for the P2/n crystal phase having four molecules in the unit cell are obtained by an ab initio calculation using CRYSTAL09 program, and are in good agreement with the observed Raman bands.

Features and advantages of flexible silicon nanowires for SERS applications.

The paper reports on the features and advantages of horizontally oriented flexible silicon nanowires (SiNWs) substrates for surface-enhanced Raman spectroscopy (SERS) applications. The novel SERS substrates are described in detail considering three main aspects. First, the key synthesis parameters for the flexible nanostructure SERS substrates were optimized.

Sensing Properties of Oxidized Nanostructured Silicon Surface on Vaporized Molecules.

Porous silicon has been intensely studied for the past several decades and its applications were found in photovoltaics, biomedicine, and sensors. An important aspect for sensing devices is their long⁻term stability. One of the more prominent changes that occur with porous silicon as it is exposed to atmosphere is oxidation.