raman – Page 2 – TechConnect Briefs

Introduction to Raman Spectroscopy as a Characterization Tool for Carbon Nanotubes, Graphene, and other Carbon Nanostructures

Hodkiewicz J., Wall M., Thermo Fisher Scientific, US

While there have been many publications produced in which Raman spectroscopy has been used to characterize various aspects of carbon nanostructures, there have been few works published which provide an overview of what the technique [...]

Rapid Determination of Purity of Carbon Nanotubes

Hodkiewicz J., Wall M., Thermo Fisher Scientific, US

Raman spectroscopy can provide for quick measurements of the carbonaceous purity of carbon nanotube samples. Carbonaceous purity is a critical parameter for many applications of carbon nanotubes. Raman spectroscopy has been reported many times in [...]

Effect of doping on the radial breathing mode of carbon nanotubes

Gerber I.C., Puech P., Gannouni A., Bacsa W.S., CEMES-CNRS, FR

Doping CNTs is an attractive alternative to control the electronic conductivity of CNTs independent of their diameter. Highly conducting nanotubes are of interest for applications in transparent thin film electrodes. When doping CNTs through substitution [...]

Fabrication of Nanoparticulate Inks for Applications in Printable Electronics

Reindl A., Aldabergenova S., Altin E., Frank G., Peukert W., Friedrich-Alexander University, DE

The main impetus of this work is the fabrication of stable suspensions (in regard to aggregation) suitable for a printing process. Therefore semiconducting nanoparticles were dispersed systematically in organic solvents using a variety of methods [...]

Confocal Raman AFM, a powerful tool for the nondestructive characterization of heterogeneous materials

Schmidt U., Vargas F., Kress M., Dieing T., Weishaupt K., Hollricher O., WITec GmbH, DE

The Confocal Raman-AFM is a breakthrough in microscopy. It combines three measuring techniques in one instrument: a high resolution confocal optical microscope, an extremely sensitive Raman spectroscopy system, and an Atomic Force Microscope (AFM). Using [...]

Near-Field Raman and Luminescence Spectroscopies to evidence chemical heterogeneity of surfaces with sub-wavelength spatial resolution

Humbert B., Grausem J., Dossot M., Cremel S., LCPME UMR 7564 CNRS-UHP, FR

Near-field scanning optical microscopy (NSOM or SNOM) offers the opportunity to collect optical information at a spatial scale well below the diffraction limit. Using a silica fiber tip coated with aluminum and having a small [...]

SERS Nanotags for Point-of-Care Diagnostics

Natan M., Oxonica, US

A holy grail in point-of-care diagnostics is to develop tests that perform on par with the central laboratory in terms of robustness, multi-analyte capability, precision, and sensitivity. Oxonica has developed a series of proprietary, nanoscale [...]

Nanoplex(TM) Biotags: Near-IR Excited, Highly Multiplexed Nanoparticulate Optical Detection Tags for Diagnostic Assays

Penn S., Cromer R., Sha M., Doering B., Brown B., Norton S., Walton I., Oxonica Inc, US

Oxonica Inc has developed a novel optical detection tag for use in point of care diagnostics, cellular imaging assays, and life science assays. Nanoplex(TM) Biotags are silica coated Au nanoparticles that, by virtue of surface [...]

Chemical imaging using molecular spectroscopy – providing answers to fundamental biomedical questions at the nanoscale

Whitley A., Gilmore A., Tay L., Lee E., Adar F., HORIBA Jobin Yvon, US

HORIBA Jobin Yvon have been at the cutting edge of major breakthroughs in many key areas of instrument development and materials analysis including the latest hybrid approach of combining two or more techniques in one [...]

Synthesis, Encapsulation and Functionization of Composite Organic-Inorganic Nanoparticles with Distinctive Surface Enhanced Raman Signatures

Zhang J., Lu Y., Lutz B., Cao M., Qin H., Yamakawa M., Dentinger C., Nguyen L., Chmura A.J., Zhu J., Lutz B., Sung K-B, Swartz K., Wang L., Su X., Sun L., Sung K-B, Berlin A.A., Chan S., Sun L., Sung K-B, Intel Corporation, US

Composite organic-inorganic nanoparticle (COIN) is a new type of optical label for multiplex biomolecule detection. It has strong Raman signal intensity and potentials for a large number of unique Raman signatures. We have developed methods [...]