spectroscopy

Overview

Brief introduction to Raman spectroscopy of materials

Growth of out-of-plane standing MoTe$_{2(1-x)}$Se$_{2x}$/MoSe$_2$ composite flake films by sol-gel nucleation of MoO$_y$ and isothermal closed space telluro-selenization

This study describes the sol-gel processing of MoO$_y$ on Si (100) to subsequently achieve out-of-plane MoTe$_{2}$/MoSe$_{2}$ flake composite films by an isothermal closed space vapor transformation. The oxide precursor films have been prepared from …

Laser writing of nanostructured silicon arrays for the SERS detection of biomolecules with inhibited oxidation

The present work reports the processing of laser irradiated Si arrays (LISi) and underlines their surface enhanced Raman scattering (SERS) functionality. A nanostructured Si/SiOx surface forms providing additional fluidic and photoprotective …

Nanostructural changes upon substitutional Al doping in ZnO sputtered films

Al:ZnO layers, with low and high Al content, 0.2% and 2.1% cat. respectively, have been prepared using the RF magnetron sputtering technique. Noticeable differences in the optical and electrical properties have been detected in these films. With …

Propiedades ópticas

Los métodos ópticos de caracterización han sido desde el principio fundamentales en el estudio de la materia, el desarrollo de la astronomía y de la teoría cuántica. Estos métodos son en general no destructivos y relativamente económicos, pues en el …

Lattice damage in 9-MeV-carbon irradiated diamond and its recovery after annealing

We have studied the radiation damage in diamond as a function of layer depth upon self-ion implantation with 9-MeV carbon ions and its recovery after annealing at $1000^\circ$C. Raman and photoluminescence spectra show substantial damage of the …

Micro-Raman spectroscopy of near-surface damage in diamond irradiated with 9-MeV boron ions

We have studied the near-surface damage in a diamond crystal caused by irradiation with swift boron ions and its healing after high-temperature annealing. A diamond crystal was irradiated with 9-MeV $^{11}$B$^{3+}$ ions with fluence values between $1 …

The apparent variability of silkworm (Bombyx mori) silk and its relationship with degumming

As spun silkworm (*Bombyx mori*) silk fibers were compared in terms of their tensile behavior and microstructure with fibers subjected to different degumming treatments. Fibers were initially retrieved by forced silking directly from the worms and, …

Laser heating induced phase changes of VO$_2$ crystals in air monitored by Raman spectroscopy

We have studied the effect of intense visible light on vanadium dioxide crystals in air by measuring micro-Raman spectra for increasing laser powers. A laser wavelength of 632.8 nm was used. For power densities above 500 MW/m2 laser heating triggers …

Differences in n-type doping efficiency between Al- and Ga-ZnO films

A careful and wide comparison between Al and Ga as substitutional dopants in the ZnO wurtzite structure is presented. Both cations behave as n-type dopants and their inclusion improves the optical and electrical properties of the ZnO matrix, making …