Material Research

A pigment obtains, for example, its maximum colour effect only in a narrow particle size range below 1 to 2 microns. Therefore, understanding particle size distribution of calcium carbonates becomes one of the foremost parameters to be examined. In this study, the particle size distribution of the two different grades of calcium carbonate was investigated using HORIBA Partica LA-960V2 Laser Scattering Particle Size Distribution Analyzer.

Steel coating plays an important role in preventing corrosion of steel samples. Therefore, an understanding of coatings can help in improving the steel properties. XRF is a powerful technique for measuring thickness and composition of coatings. We carried out non-destructive thickness and composition analysis of Zinc-Nickel coating on steel using the MESA-50 X-ray fluorescence analyzer.

This application note describes the use of the Aqualog for monitoring regulated Dissolved Organic Matter (DOM) and disinfection by-product issues for drinking water treatment.

Emergence of organic memristors has been hindered by poor reproducibility, endurance stability scalability and low switching speed. Knowing the primary driving mechanism at the molecular scale will be the key to improve the robustness and reliability of such organic based devices.

Co-localized microscopy techniques for pyrite mineral spatial characterization

In this study we have chosen to investigate pyrite and its surrounding minerals in order to identify the different mineral phases as well as the chemical variations from micro- to nano-scale. Using the different microscopes instruments and being co-localized allows a comprehensive characterization of the sample and a precise superimposition of all the images.

Multimodal spectroscopy techniques for nanostructured materials characterization

In this article, we present the combination of Raman spectroscopy, Photoluminescence and SEM-CL techniques, where the instruments weren’t physically connected. Smart nanostructured materials require a comprehensive understanding of their morphology, elemental and chemical composition. nanoGPS Suite solution allows a colocalized combination of a variety of microscopy techniques, providing a full characterization of nanostructured materials and a precise superimposition of the results obtained.

Fast analysis of microscopic metal particles is an important application for engineering (e.g. engine wear analysis). Micro-XRF scanning and spot analysis of specific fragments identifies their chemical composition.

TERS Characterization of Graphene Nanoribbons

Graphene is foreseen for a handful of electronic and optoelectronic nano-devices. Making nano-devices out of graphene requires nanopatterning. Determining the quality of patterned graphene is essential and the detection of defects demands a sensitive chemical nano-characterization tool.

TERS Characterization of phospholipid bilayers and detection of nanoparticles

Phospholipid bilayers, major constituents of membranes act as a barrier of selective permeability for the nanoparticles now largely into our environment. Studying the interactions between nanoparticles and cellular membranes requires a molecular chemical probe with nanometer resolution capability.

Gold nanorods are rod-shaped gold nanoparticles. Fig. 1 shows that gold nanorods have two surface plasmon bands in the directions of the short and long axes derived from their anisotropic shapes.

Carbon nanotubes (CNT) are attracting attention and being utilized as cutting-edge materials, including battery materials, due to their lightness, strength, and current density resistance. Various applications have been developed based on these characteristics.

Silica particle size standards with National Institute of Standards and Technology (NIST) traceable certified mean diameters are suitable for a wide variety of particle measurement applications. This time, four types of monodispersed colloidal silica Sigma-AldrichTM (SA) were mixed to evaluate the resolution and quantitative capability of the centrifugal sedimentation method.

Cellulose nanocrystals (CNC) are needle-like materials with a width of about 5-20 nm and a length of about 100-250 nm defibrated using chemical treatment. It is important to understand the fiber size and dispersion state. It is necessary to have an analysis method that can quickly evaluate a wide ranges of particle size distribution for separated particles to agglomerates.

Optical Micro-spectroscopies on a Path to Identify the Source of Life

In this article, we present how our Raman and X-Ray Fluorescence microscopies can be combined to shed some light on the origins of the universe. We show some examples on a meteorite piece and on water inclusion in quartz matrix.

Nanocellulose is a fibrous material derived from wood and is used as composite materials, etc. Cellulose nanocrystals (CNC) are needle-like materials with a width of about 5-20 nm and a length of about 100-250 nm defibrated using chemical treatment. CNC is cheaper and more attractive than other high-performance nanomaterials as an alternative to some other petrochemical products. It is expected to be useable for oil spill cleaning, engineering, pharmaceuticals, container substitutes, biodegradable food packaging, etc. It is important to understand the fiber size and dispersion state. It is necessary to have an analysis method that can quickly evaluate a wide ranges of particle size distribution for separated particles to agglomerates.

Nanocellulose is a fibrous substance derived from wood and is attracting attention as a cutting-edge material. Cellulose nanofibers (CNF) manufactured by TEMPO oxidation are cellulose fibers that have added carboxy groups at high density. This type of CNF is made with high efficiency and is characterized by a very thin and uniform fiber width of about 3 nm. To utilize nanocellulose, it is important to understand the fiber diameter and dispersion state. To do so, it is necessary to have an analytical method that can quickly evaluate a wide ranges of particle size distribution, from well-dispersed particles to agglomerates at high resolution.

Chemical Mechanical Polishing (CMP) technology is used as an indispensable fundamental technology in the manufacturing process of ultra-large-scale semiconductor integrated circuits (ULSI). CMP is a technique in which the surface of a substrate is softened, removed or flattened by chemical etching and frictional abrasion with a chemical slurry that contains abrasive particles. Fumed silica abrasive particles are synthesized in a gas phase reaction in flame and are dispersed as secondary particles that are aggregates of primary particles. They are known to have thiogenic properties. Although the rate of polishing is high for fumed silica, its polishing precision is inferior to that of colloidal silica.

TERS Characterization of Single- to Few-Layer Ti₃C₂Tₓ MXene

MXenes is the largest and fastest growing 2D materials. They have unique properties such as good conductivity and a hydrophilic surface. The control of nanoscale composition would ultimately allow for engineering properties locally, gaining more control over the 2D material-based systems.

The Flowing Gas Technique for determining BET Surface Area has been in use for over 70 years. Many facets of the technology make it a very attractive alternative to the Static-Volumetric approach. Detection is done by measuring a gas concentration difference instead of an absolute pressure. Difference measurements are typically more accurate than many absolute measurements.

A feasibility study to measure low specific surface areas was performed using Certified Reference Materials consisting of two alpha-alumina powders and one quartz powder. The results show the SA-9600 can measure low specific surface area, with great agreement with certified values.

Nanocellulose is a fibrous material derived from wood that is applied to composite materials and is attracting attention as an advanced material. In order to utilize nanocellulose, it is important to understand the fiber diameter and dispersion state. 3 types of nanocellulose were analyzed using the Partica CENTRIFUGE centrifugal nanoparticle analyzer.

Elemental distribution is crucial for material science. The XGT-9000 Series provides this information non-destructively.

Pulsed Radio Frequency Glow Discharge-Optical Emission Spectrometry was used to study different electroplated samples. The flexibility of the spot size, the use of a pulsed RF source and the introduction of the differential interferometry profiling make RF GD-OES a key technique for the electroplating industry.

It is not yet understood how co-crystal nanoparticles (co-crystallinity combined with nanostructuring) have superior properties to single compound crystals. Only a technique capable of probing single nanoparticles can bring answers.

Magnetron sputtering is a type of Plasma Vapour Deposition that uses magnetic fields to keep the plasma in front of the target, intensifying the bombardment of ions.

Pulsed RF GDOES is a companion analytical tool for magnetron sputtering deposition. Magnetron sputtering is a type of Plasma Vapour Deposition. The vacuum chamber of the PVD coating machine is filled with an inert gas, such as argon. By applying a high voltage (RF, HIPIMS etc), a glow discharge is created, resulting in acceleration of ions to the target surface and a plasma coating. The argon-ions will eject sputtering materials from the target surface (sputtering), resulting in a sputtered coating layer on the products in front of the target.

Can we accurately and quickly measure the amount of carbon contained in the material?

The aim of this application note is to explain the determination of organic and inorganic carbon in soils and how to prepare samples to eliminate inorganic carbon (carbonates) in these soils.

The use of metal surfaces in conjunction with fluorescence molecules employing a plasmon effect, sometimes referred to as metal enhanced fluorescence, can be advantageous because of the possible enhancement of photophysical properties.

Correlated TERS and KPFM of Graphene Oxide Flakes

Visualizing the distribution of structural defects and functional groups present on the surface of two-dimensional (2D) materials such as graphene oxide challenges the sensitivity and spatial resolution of most advanced analytical techniques.

Characterization of diamond layers by SE: crystalline undoped diamond layers on silicon substrate.

In this work, spectroscopic ellipsometry (SE) was successfully applied to characterize the optical properties and the thicknesses of doped and undoped diamond layers. The sensitivity of this technique enables the doped layer to be distinguished from the undoped one in a sample consisting of a stack of these two layers. Moreover, an interface between the two layers has been detected. This work and others reported previously show clearly that ellipsometry is the technique of choice for the characterization of optical and structural properties of layered materials thanks to its sensitivity and the wide range of information it provides.

AFM-TERS measurements in a liquid environment with side illumination/collection

Atomic Force Microscopy (AFM) associated to Raman spectroscopy has proven to be a powerful technique for probing chemical properties at the nanoscale. TERS in liquids will bring promising results in in-situ investigation of biological samples, catalysis and electrochemical reactions.

Three Dimensional Raman Imaging

Segmented channel waveguides have been fabricated in single crystal KTiOPO4 through a topotactic process of partial cation exchange. The ion-exchanged waveguides maintain the high nonlinear susceptibility of KTiOPO4 to function as frequency doubling laser light sources. We apply three dimensional (3D) Raman imaging to understand and characterize the changes to the chemical bonding and crystalline structure as well as measure the volumetric structure of the waveguide segments.

Correlated TERS, TEPL and SPM Measurements of 2D Materials

Many challenges remain before the promise of 2D materials is realized in the form of practical nano-devices. An information-rich, nanoscale characterization technique is required to qualify these materials and assist in the deployment of 2D material-based applications.

InGaAs/GaAs and InAs/GaAs quantum dots (QDs) have been identified as suitable candidates for various applications in the terahertz range by using their intraband carrier transitions.

Upconverting lanthanide-based nanomaterials exhibit a unique fluorescence anti-Stokes shift, which enables them to convert NIR wavelength excitation into visible shorter wavelength emissions (NIR to UV-Vis).

Measurement of Hydrogen (and Deuterium) by RF GDOES

RF GD OES is well known for ultra fast elemental depth profile of thin and thick films. All elements can be measured including Hydrogen (H) which is important in many application fields - for corrosion studies, for PV, in metallurgy, for the development of hydrogen storage materials and for all polymeric coatings studies to name a few. The most sensitive emission line for H is in the VUV range at 121,567 nm.

A flake of MoS2: the TEPL shift image derived from fitting the PL peak through regression analysis.

Both TEPL and TERS images are well correlated with AFM morphological images obtained simultaneously, and all are consistent in revealing the nature (number of layers) of MoS2 flakes. Upon deconvolution, the TEPL signal is even capable of revealing local inhomogeneities within a MoS2 flake of 100 nm size. Kelvin probe measurement supports TEPL and TERS measurements and adds to the power of such tip-enhanced combinative tools. TEOS characterization of 2D materials is likely to contribute to further deployment of these materials into commercial products through a better understanding of their electrical and chemical properties at the nanoscale.

Combined Raman and Photoluminescence Imaging of 2D WS2

Raman and photoluminescence spectroscopy reveal different aspects of the solid state structure of 2D materials. Raman and photoluminescence imaging performed simultaneously with one instrument reveals the spatial variation of the solid state structure and electronic properties of 2D crystals that is not revealed in reflected white light imaging. That ability should allow materials scientists to better design and fabricate electronic and optoelectronic devices based upon 2D crystals.

Characterization of Carbon Nanotubes using Tip-Enhanced Raman Spectroscopy (TERS)

The use of TERS to reveal the defects density in the structure of CNTs is of interest for a better understanding of the electrical properties of the devices made with such nano-objects. Not only defects concentration but also local chirality changes from the different radial breathing modes, pressure effect and strain distribution can be studied at the single carbon nanotube level through TERS.

A combined (low-frequency and fingerprint) Raman map of MoS2 layers.

The two methods - Analysis of fingerprint modes (intralayer) and Analysis of low-frequency modes (interlayer) - give complementary results and allow the determination of the number of MoS2 layers. Method 2 (using low frequency modes) gives excellent contrast; however it does not show single layer regions (which is related to the nature of the modes, rising from interaction between at least two layers). Method 1 (using fingerprint modes) shows all the layers, but the contrast is poorer, particularly for higher numbers of layers. The best result can be obtained combining the two methods. All the measurements (low-frequency and fingerprint) were done using ultra-low frequency ULFTM filters which allow a high throughput measurement in a full Raman range, down to <10 cm-1.

C60 (a) and C70 (b) fullerenes.

Spectroscopic ellipsometry (SE) is used to determine the optical constants of C60 and C70 thin films over the range 0.6-6.5eV (i.e. 190-2100nm). The information provided by the optical constants allows for a better understanding of the electronic structure of these materials.

Main properties determined by Spectroscopic Ellipsometry.

The UVISEL Spectroscopic Ellipsometer is the ideal tool for reliable film thickness and optical constants characterization of amorphous carbon coatings, even in difficult cases where the film thickness is very thin. Roughness, and interface "adhesion" can also been determined.

RBM spectrum that represents tubes with at least 3 different properties.

Raman has shown a high potential in characterising the SWCNTs' structure. The correlation between knowledge about structure with physical and chemical properties about the tubes make the technique extremely powerful to control the quality of the SWCNTs for specific applications. Raman spectrometer capabilities like spatial resolution, spectral resolution and excitation wavelength versatility have been examined. Beside Raman, preliminary fluorescence studies are describing the potential of the technique.

Spectra of carbon films that require a fit with 2 and 3 bands.

The Raman spectra of the various forms of elemental carbon are very sensitive to the type of nearest neighbour bonding, and to intermediate and long range order. In many cases Raman spectroscopy is the technique of choice for characterization of carbon materials. Correlation of Raman spectral features with tribological properties can facilitate the deposition of carbon films.

A Raman map of a graphene sample on a SiO2/Si substrate performed using the XploRA Raman spectrometer with a 532 nm laser excitation: Multivariate analysis.

Graphene is a new nanomaterial which may partially replace silicon in microcircuits and computer chips in the future. In order to better understand its quality characteristics, fast reliable techniques that deliver the right property measures are needed. Raman spectroscopy has emerged as a key technique for studying this exceptional material.

Photoluminescence Spectroscopy of Quantum Dots

Quantum dots (QDs) have potential applications in optoelectronics, biosensing, biolabeling, memory devices, and sources of laser light.

Characterization of diamond layers by SE: crystalline undoped diamond layers on silicon substrate.

In this work, spectroscopic ellipsometry (SE) was successfully applied to characterize the optical properties and the thicknesses of doped and undoped diamond layers. The sensitivity of this technique enables the doped layer to be distinguished from the undoped one in a sample consisting of a stack of these two layers. Moreover, an interface between the two layers has been detected. This work and others reported previously show clearly that ellipsometry is the technique of choice for the characterization of optical and structural properties of layered materials thanks to its sensitivity and the wide range of information it provides.

HORIBA Jobin Yvon’s NanoLog® spectrofluorometer, specially optimized for recording near-IR fluorescence from nanoparticles, includes a double-grating excitation monochromator, imaging emission spectrograph with a selectable-grating turret, and a variety of detectors.

A typical spectrum of a hard carbon film.

The Raman spectra of elemental carbon materials are known to be sensitive to polymorphy. For hard carbon films, the spectra of amorphous and diamond-like carbons can be band-fit to separate the contributions of the "graphitic carbon" (G band) from the "disordered carbon" (D band). The spectral behaviour of carbon films has been empirically correlated with thin film physical properties such as hardness, durability, optical transparency, electrical conductivity, thermal conductivity and corrosion resistance, and can be of use for prediction of these properties without extensive alternative testing. The DiskRam has been designed to automate the collection of Raman spectra from hard carbon coatings on computer hard disk media and the extraction of parameters that are well correlated with the properties of the films. The extracted information is output in spreadsheet format for SPC at a manufacturing facility.

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DP-50S Electrode stand

DP-50S Electrode stand

6367-10D (for high accuracy pH measurement)

6367-10D (for high accuracy pH measurement)

DP-70S Electrode Stand

DP-70S Electrode Stand

6252-10D (for food samples)

6252-10D (for food samples)

Glass Electrode 1066A-10C

Glass Electrode 1066A-10C

Standard type

Glass Electrode 1076A-10C

Glass Electrode 1076A-10C

For measurement of low-conductivity water and non-aqueous solvents.

6069-10C (for very slender test tubes)

6069-10C (for very slender test tubes)

6261-10C (for flat surface measurement)

6261-10C (for flat surface measurement)

XGT-7200

X-ray Analytical Microscope

MESA-50K

X-Ray Fluorescence Analyzer

MESA-50

X-Ray Fluorescence Analyzer