Raman spectroscopy – TechConnect Briefs

Spectral Characterization of Tin Dioxide for Gas-Sensing Applications

Alghamdi H., Concepcion B., Baliga S., Misra P., Howard University, US

Thin films and powder samples of tetragonal tin dioxide (SnO2) on UV quartz and silicon wafers, created through radio frequency (RF) sputtering in an oxygen/argon mixed atmosphere, have been prepared and characterized spectroscopically. These thin [...]

Surface Modification and Characterization of Polylactic Acid (PLA) 3D printed structures for Cell culture applications.

Pokharna P., Ghantasala M., Rozhkova E., Western Michigan University, US

The main aim of this research is to understand the surface modification effects and improve the surface properties of 3D printed scaffolds that would be biocompatible and support the growth and proliferation of cells. Polylactic [...]

Kinetics study of carbon nanotube alignment under shear force via real-time polarized Raman spectroscopy

He Y., Taub A.I., University of Michigan-Ann Arbor, US

Carbon nanotubes (CNTs) have been studied extensively since their discovery by Iijima in 1991. They have a unique quasi one-dimensional nanoscale structure with remarkable mechanical, electrical and thermal properties. Numerous investigations have been done on [...]

Nanostructural and biochemical property changes in activation-induced CD8+ T cell apoptosis utilizing AFM and Raman spectroscopy

Lee G.J., Lee Y.J., Lee G.J., Lee Y.J., Park H.K., Kyung Hee University, KR

This study was to investigate the changes in nanostructure and biochemical properties of activated mature CD8+ T cells related to apoptosis at a molecular level. We confirmed the activation and apoptosis of CD8+ T cells [...]

New Insights into Microstructure, Rheology & Molecular Level Structural Changes During Self-Assembly & Gelation in Complex Fluids Through Combined DLS-Optical Microrheology-Raman Spectroscopy

Amin S., Blake S., Kidder L., Lewis E.N., Kenyon S., Malvern Instruments, US

Soft Matter/Complex fluid systems are ubiquitous across a range of industrial and consumer sectors. In many instances the final product format of these complex fluids are gels or soft solids and the processing and product [...]

New Insights into Microstructure, Rheology & Molecular Level Structural Changes During Self-Assembly & Gelation in Complex Fluids Through Combined DLS-Optical Microrheology-Raman Spectroscopy

Amin S., Blake S., Kidder L., Lewis E.N., Kenyon S., Malvern Instruments, US

Soft Matter/Complex fluid systems are ubiquitous across a range of industrial and consumer sectors. In many instances the final product format of these complex fluids are gels or soft solids and the processing and product [...]

Investigation of interaction between graphene and steel using Raman Spectroscopy

Fushiwaki Y., Abdelkader A.M., Young R.J., University of Manchester, UK

The purpose of this study is to understand interaction between graphene and sheet steel by the use of Raman Spectroscopy. First of all, the graphene was put on the polished steel. Secondly, it was inspected [...]

Raman Spectroscopic Characterization of Carbon Nanotubes & Tungsten Oxide of Relevance to Energy Storage and Gas Sensing Applications

Misra P., Casimir D., Garcia-Sanchez R., Baliga S., Howard University, US

The characterization of graphitic and metal oxide nanomaterials through the use of Resonant Raman Spectroscopy at multiple laser excitations is the primary aim of this research. Raman spectroscopic techniques can help characterize the vibrational phonon [...]

Photothermal Structural and Optical Changes In GaAs Nanowires

Walia J., Dhindsa N., Flannery J., LaPierre R., Forrest J., Saini S.S., University of Waterloo, CA

The structural and optical changes in vertically etched GaAs nanowires are examined. The nanowires were annealed via photo-thermal conversion, using 100 mW of incident laser power, to induce the onset of arsenic formation. Four nanowire [...]

Reliability Prediction of Single-Crystal Silicon MEMS Using Dynamic Raman Spectroscopy

Dewanto R., Hu Z., Gallacher B., Hedley J., Newcastle University, UK

This paper proposes an extension and improvement to reliability predictions in single-crystal silicon MEMS by utilizing dynamic Raman spectroscopy to allow the gathering process of Weibull fracture test data to be done directly on devices [...]